CN105856981A - Wireless tire pressure monitoring system and automatic code learning method thereof - Google Patents

Abstract

The wireless tire pressure monitoring system and the automatic code learning method thereof comprise the following steps: enabling each tire to generate vibration according to a preset sequence, and enabling the vibration sensing module of the tire pressure detector arranged in each tire to sense the amplitude larger than a preset value in sequence; each tire pressure detector sends a signal packet to a receiver, wherein the signal packet records the tire pressure of the tire and an identifier representing the tire pressure detector; the receiver receives the signal packets sent by each tire pressure detector in sequence, reads each identifier, and pairs each identifier of each tire pressure detector with each tire to complete automatic code learning of the wireless tire pressure monitoring system.

Description

Wireless tire pressure monitoring system and its automatic code learning method

technical field

The invention relates to a tire pressure monitoring system; in particular, it refers to a wireless tire pressure monitoring system and an automatic code learning method thereof.

Background technique

According to the statistics of the National Highway Bureau, nearly 70% of the major accidents on highways in recent years are caused by tire blowouts. Therefore, how to effectively control the status of tires while driving has become the key to driving safety. measure.

At present, some countries in the world have laws and regulations that require vehicles to be equipped with a wireless tire pressure monitoring system (Tire Pressure Monitoring System; TPMS) as a standard equipment for vehicles. At the initial stage of the abnormality, the system will warn and stop the driving action, further achieving the effect of preventing tire blowouts and avoiding accidents and casualties. When setting up a wireless tire pressure monitoring system on a vehicle, each tire is provided with a transmitter and a sensor respectively. When positioning the sensor of each tire, the learning method of the wireless tire pressure monitoring system in the prior art, The technician releases part of the pressure of each tire of the vehicle in sequence. When the sensor detects a sudden change in tire pressure, the transmitter is driven to send an identifier representing the tire, so as to locate the sensor on the tire. After the code learning is completed, the tire still needs to be inflated again to drive the vehicle.

However, the above-mentioned code learning method is very troublesome for ordinary car owners, especially when the car owner needs to re-learn the code of the wireless tire pressure monitoring system, the procedure of inflating and deflated tires will inevitably require the assistance of technical personnel from the car factory for ordinary car owners to complete.

In addition, U.S. Patent No. 6,668,636 discloses a tire position recognition system and method for identifying tire pressure monitoring, which is respectively equipped with a tire pressure detector for each tire to detect the tire pressure, each tire pressure The detector further includes a vibration sensor for sensing vibration, and a receiver is installed on the vehicle for receiving the tire pressure signal sent by the tire pressure detector, and a controller for processing the signal received by the receiver. Tire pressure signal. Therefore, when the controller is operating in a program mode and the vehicle is stationary, each tire pressure detector transmits an identifier to which it belongs when each tire is tapped in a preselected sequence And the tire pressure signal to the receiver to complete the coding of the tire pressure monitoring system. When the vehicle is in motion, any shock affecting the tires will be ignored by the tire pressure detector and will not trigger the transmission of the tire pressure signal. At this time, the controller operates in a normal mode. Accordingly, compared with the above method of learning codes by releasing the tire pressure, the above tire pressure system programming method is simple for the general untrained car owners.

However, the above tire pressure system programming method can only be programmed when the vehicle is stationary. When the vehicle is moving, the controller will enter a normal mode, only receive tire pressure signals, and cannot perform tire pressure system programming. In this way, It is very inconvenient for car owners. Furthermore, when the vehicle is stationary, if there is vibration in the environment, such as the vibration generated by the vehicle on the road when parking on the roadside, the tire pressure detectors may also send signals abnormally and consume electric energy.

It can be seen that the code learning method of the existing wireless tire pressure monitoring system still has some imperfections.

Contents of the invention

In view of this, the object of the present invention is to provide a wireless tire pressure monitoring system and its automatic code learning method. After the tire pressure detector installed on the tire detects a vibration greater than a certain degree, each tire is connected to the Each tire pressure monitor is paired.

In order to achieve the above purpose, a wireless tire pressure monitoring system provided by the present invention is applied to a vehicle with multiple tires. The wireless tire pressure monitoring system includes multiple tire pressure detectors, which are respectively installed in each tire , each of the tire pressure detectors has a tire pressure sensing module, a vibration sensing module, a signal sending module and a processor; the tire pressure sensing module is used to sense the tire pressure of the tire; the vibration sensor It is used to sense the vibration amplitude acting on the tire; the signal sending module is used to send wireless signals; In the operation of the above module, when the shock sensor first detects the movement of the tire and then senses a vibration amplitude greater than a predetermined value, the processor transmits a signal packet containing an identifier to the signal sending module, wherein the identifiers of the tire pressure detectors are different from the identifiers of other tire pressure detectors; and a receiver is arranged in the vehicle for receiving the signal packets sent by the tire pressure detectors, And interpret and obtain the corresponding tire pressure and identifier. Thus, when each of the tire pressure detectors sends the signal packets to the receiver according to a predetermined order, the receiver sets the identifier in the signal packets correspondingly according to the order in which the signal packets are received. The location of each tire.

In order to achieve the above object, the present invention further provides an automatic code learning method suitable for the above wireless tire pressure monitoring system, which is used to pair each tire pressure detector with the position of each tire, so that the identifier Corresponding to each of the tires and recorded in the receiver, the automatic code learning method includes the following steps: A. Make each of the tires or each of the tire pressure detectors exposed to each of the tires to generate vibrations in accordance with the predetermined sequence, so that The vibration sensing module of each tire pressure detector senses the amplitude greater than the predetermined value in sequence; B, each of the tire pressure detectors sends the signal packet to the receiver; C, the receiver sequentially receives The signal packets sent by each tire pressure detector pair each tire pressure detector with each tire.

The effect of the present invention is to make each tire pressure detector sense an amplitude greater than a predetermined value in sequence, and send a signal packet storing the identifier of each tire pressure detector and the tire pressure to the receiver in sequence. device, to complete the pairing of each tire pressure detector with the location of each tire.

Description of drawings

In order to illustrate the present invention more clearly, the following preferred embodiments are given in conjunction with the accompanying drawings in detail as follows, wherein:

Fig. 1 is a configuration diagram of a wireless tire pressure monitoring system according to a preferred embodiment of the present invention.

FIG. 2 is a block diagram of the tire pressure detector of the present invention.

FIG. 3 discloses that driving a vehicle through a roadblock causes each tire to vibrate sequentially.

FIG. 4 discloses the use of a tool to tap each tire in sequence to generate vibrations.

detailed description

Please refer to FIG. 1, which is a wireless tire pressure monitoring system 100 of a preferred embodiment of the present invention, which can be applied to a vehicle 10 with multiple tires. The wireless tire pressure monitoring system 100 includes multiple tire pressure detection Devices 21-24 and a receiver 30.

Each of the tire pressure detectors 21-24 is respectively arranged in each of the tires 11-14 of the vehicle 10, and partly exposed to each of the tires 11-14, and each of the tire pressure detectors 21-24 The exposed part can be used as the signal sending antenna of the tire pressure detector and the air nozzle of the tire. Wherein, the number of tire pressure detectors can be increased or decreased according to the number of tires of the vehicle. Since each tire pressure detector 21-24 has the same structure, the tire pressure detector 21 is cited to illustrate its internal structure. Please refer to FIG. 2, the tire pressure detector 21 has a tire pressure sensor Detecting module 25, a temperature sensing module 26, a vibration sensing module 27, a signal sending module 28 and a processor 29, the tire pressure sensing module 25 is used to sense the tire pressure of the tire to generate the corresponding tire pressure pressure information; the temperature sensing module 26 is used to sense the tire temperature of the tire; the vibration detection module 27 is used to sense the amplitude acting on the tire, and in this embodiment the vibration sensing module 27 is a vibration sensor ( Shock Sensor), wherein the advantage of using the shock sensor is that the weight and volume of the shock sensor are lighter, and when it is installed on the tire, it has less influence on the offset of the center of gravity of the tire and does not affect the moment of inertia of the tire; the signal sending module 28 is used to send wireless signals; the processor 29 is electrically connected to the tire pressure sensing module 25, the temperature sensing module 26, the vibration sensing module 27 and the signal sending module 28, and the processor 29 can read the The tire pressure information, tire temperature, and tire information such as the amplitude acting on the tire sensed by the tire pressure sensing module 25, the temperature sensing module 26, and the vibration sensing module 27, the processor 29 then After the tire information and an identifier are compiled into a signal packet, the signal packet is transmitted to the signal sending module 28, wherein the identifier of each tire pressure detector is different from the identifiers of other tire pressure detectors.

The receiver 30 is installed in the vehicle 10, and can be used to receive the signal packets transmitted by each of the tire pressure detectors 21-24, and interpret and obtain the corresponding tire information and represent each of the tire pressure detectors 21-24. identifier of the . The receiver 30 has a display interface 32 and a control interface 34. The display interface 32 displays the acquired tire information for the driver to monitor tire pressure, tire temperature and other information. The control interface 34 allows the driver to operate the receiver 30 to enter two modes: a code learning mode and a monitoring mode.

In the code learning mode, each tire pressure detector 21-24 can be paired with the position of each tire 11-14 by causing the tires of the vehicle to generate an amplitude greater than a predetermined value in a predetermined order, Each of the identifiers corresponds to each of the tires and is recorded in the receiver 30 . Wherein, as shown in FIG. 3, the automatic code learning method of the wireless tire pressure monitoring system 100 is:

The driver drives the vehicle 10 on a lane and maintains a speed between 20 kilometers and 40 kilometers per hour. Two hump-designed deceleration hills (Speed Hump) 41, 42 are arranged on both sides of the lane ahead as appropriate roadblocks. Each tire pressure detector on the vehicle reads the vibration waveform measured by the vibration sensing module every 20 milliseconds. Wherein, the setting of the successive distance D1 of the two deceleration hills 41, 42 is designed to match the distance D2 of the front and rear tires of the vehicle. Since the distance D1 is greater than the distance D2, when the vehicle 10 passes through the two deceleration hills 41, 42 in sequence , the tires of the vehicle 10 will follow the order of tire 11, tire 12, tire 13, and tire 14 (that is, from the front tire 11 on the driving side to the rear tire 12, and then to the front tire 13 on the passenger side to the rear tire 14) Roll over the two deceleration mounds 41, 42 respectively to generate a vibration amplitude greater than the predetermined value. At this time, the tire pressure detectors 21-24 installed on each of the tires 11-14 will successively sense vibration signal waveforms with obvious variations as shown in Figure 4, and the tire pressure detectors 21-24 will then Send signal packets to the receiver 30 according to the order in which the tires 11-14 vibrate, and then, the receiver 30 will interpret the signal packets to obtain the tire pressure detectors 21 according to the order in which the signal packets are received. -24 identifiers, each identifier is paired with the tires 11-14 in sequence, and recorded in the receiver 30, so as to complete the code learning of the wireless tire pressure monitoring system of the vehicle 10. Among them, suitable roadblocks are not limited to deceleration hills, any potholes or convex hills, etc., as long as they can cause obvious vibration when the tires of the vehicle are rolled over.

Among them, the reason for choosing 21 kilometers to 40 kilometers per hour as the vehicle speed range is that in response to the frequency at which the tire pressure detector reads the vibration sensing module to read the amplitude, under this speed range, the time interval for the tires to sense vibrations in sequence Exactly coincides with the processing time of the receiver 30 corresponding to each of the tires and each of the identifiers. In addition, in other applications, the tire pressure detector can also be set to read the vibration waveform measured by the vibration sensing module every 10 milliseconds or less, but it is not limited thereto.

The above-mentioned automatic code learning method is based on the predetermined sequence of tire 11, tire 12, tire 13, and tire 14, so that the tires produce obvious vibrations in order to trigger the tire pressure detector to send a tire pressure packet to the receiver, and the receiver obtains The sequence of identifiers is paired with each tire. In addition to this predetermined order, the wireless tire pressure monitoring system can also be set according to the user's needs, usage habits, or according to the appropriate distribution of roadblocks on the receiver's control interface. The pairing sequence of pressure detectors, for example:

(1) When the distance D1 of the deceleration hills 41, 42 is less than the distance D2 of the front and rear wheels, it is set in the order of tire 11, tire 13, tire 12, and tire 14 (that is, the front side tire 11 of the vehicle to the tire 13, and then to the rear side tires 12 to 14 of the vehicle) to learn codes, then, the driver drives the vehicle 10 through the two deceleration hills 41, 42, and according to the order of the tires 11, 13, 12, and 14 respectively with the two deceleration hills. The two deceleration hills 41, 42 generate vibrations to sequentially trigger the tire pressure detectors in the tires to complete the automatic code learning of the wireless tire pressure monitoring system.

(2) When there is only one convex hill on the road, the driver can set the order of tire 13, tire 14, tire 11, and tire 12 to learn the code, and drive the vehicle 10 in sequence with tire 13, tire 14, The order of the tires 11 and 12 (the front tire 13 to the rear tire 14 on the passenger side, and then to the front tire 11 to the tire 12 on the driver's side) vibrate with the bump respectively to trigger the tires in each tire in sequence. The tire pressure detector completes the automatic code learning of the wireless tire pressure monitoring system. Among them, the advantages of the above-mentioned pairing sequence can not only complete the code learning of the wireless tire pressure detection system installed on the vehicle more quickly, but also allow the driver to set an appropriate pairing sequence according to the current road environment, such as the pairing sequence (1) The middle driver only needs to drive through the two deceleration hills 41 and 42 once to complete the code learning, and does not need to detour the road for many times to complete. However, in different road environments such as in pairing sequence (2), in the case of only one speed bump, it is only necessary to go around twice, one is used to trigger the front and rear tires on one side of the vehicle, and the other is used to trigger the vehicle The front and rear tires on the other side can complete the code learning.

It is worth mentioning that the automatic code learning method of the present invention can also allow the wireless tire pressure monitoring system installed on the vehicle to learn code when the vehicle is stationary or idling. Please refer to Figure 5 and set it to the code learning mode Afterwards, after driving the vehicle to maintain a speed greater than 20 kilometers per hour for a period of time, park the vehicle and continue to supply power to the receiver 30, so that the receiver 30 is in a working state, and then, hold a hammer 50 and beat the tires 11- 14 Close to the part where the tire pressure detector 21-24 is installed (for example, tire skin, etc.), or use a wrench, screwdriver or pliers to directly tap the tire pressure detector 21-24 exposed on the For the part of the tires 11-14, let the tire pressure detectors 21-24 detect vibrations greater than the predetermined value in accordance with a predetermined sequence to complete automatic code learning. In addition, any tool can be used as long as it can knock the tire and cause the tire or the valve to vibrate, without being limited to the aforementioned tools.

The automatic code learning method of the present invention is to drive the vehicle to maintain a certain speed and drive for a period of time, then park the vehicle and keep it in a static or idling state, and then let the tire pressure detector detect the Vibration greater than the predetermined value is used to complete automatic code learning. In addition, the automatic code learning method of the present invention can choose an environment and time with less vibration to learn codes, so as to increase the accuracy of code learning, and avoid the tire pressure detectors in the prior art that may be affected by external vibrations. Send signals abnormally, and consume power and other problems.

In the monitoring mode, the wireless tire pressure monitoring system 100 can provide the driver with information about the tires of the vehicle 10 during normal driving, and give warnings when the tire pressure and tire temperature are abnormal. The update frequency of the tire information can be set on the control interface 34 of the receiver 30 according to the usage requirements. Preferably, each tire pressure detector reads the measured tire pressure every 4 seconds. pressure and tire temperature once, and send each signal packet to the receiver 30 every 1 minute, and the receiver 30 obtains the tire pressure and tire temperature information of the tire and displays them on the display interface 32 for the driver to monitor Tire pressure status, tire temperature and other information. And when one of the tire pressure detectors 21-24 detects that the tire pressure or tire temperature of the tire 11-14 changes abnormally (such as a sudden increase or decrease in tire pressure or tire temperature), The abnormal tire pressure detector will immediately send a signal packet to the receiver 30, and the receiver 30 will immediately send a warning on the display interface 32 after receiving it. Wherein, the above-mentioned update frequency can effectively save the energy consumed by the wireless tire pressure monitoring system, and provide the driver with the ability to monitor the tire condition while effectively keeping close to the current tire information.

In summary, the automatic code learning method of the wireless tire pressure monitoring system of the present invention has the following advantages:

1. Using a tire pressure detector with a shock sensor does not need to connect additional circuits and components in series, which can effectively reduce the overall volume and weight. Therefore, when doing tire balance calibration after installing the tire pressure detector , the required device has fewer balance counterweight elements, which can reduce the influence on the moment of inertia of the vehicle tires when the vehicle is running.

2. Use the vibration sensor to sense the obvious signal difference between the flat road and the uneven road, just set up simple roadblocks, or use the existing roadblocks on the road, or knock each tire or each The tire pressure detector is exposed to the parts of the tires, and the automatic learning code of the wireless tire pressure monitoring system can be implemented. The conditions required for learning the code are simple, and ordinary drivers can learn the code for the wireless tire pressure system monitoring system without asking for professional assistance.

3. The driving performance of the vehicle will not be affected during the code learning (no need to deflate the tires, release pressure, or disassemble, assemble, etc.), the vehicle can run normally, and the vehicle can be on the road immediately after the code learning is completed, which can effectively shorten the Learning to code schedule.

4. After the vibration sensor first detects the movement of the tire, and then senses an amplitude greater than a predetermined value, the processor transmits a signal packet containing an identifier to the signal sending module for transmission. This design can save power and avoid Signals are sent abnormally.

The above descriptions are only preferred feasible embodiments of the present invention, and all equivalent changes made by applying the description of the present invention and the scope of the patent application should be included in the scope of the claims of the present invention.

Claims (8)

1. a radio tire pressure monitoring system, is applied to a vehicle with multiple tire, this is wireless tire Pressure monitoring system includes:

Multiple tire pressure detectors, are respectively arranged at respectively in this tire, and respectively this tire pressure detector all has one Tire pressure sensing module, a vibrations sensing module, a signal transmitting module and a processor；This tire pressure Sensing module is for sensing the tire pressure of this tire；This shock sensor acts on this tire for sensing Amplitude；This signal transmitting module is used for sending wireless signal；This processor senses mould with this tire pressure respectively Block, these vibrations sensing module and this signal transmitting module are electrically connected with；When these vibrations sensing module is first After detecting the motion of this tire, then when sensing the amplitude more than a predetermined value, this processor i.e. passes The defeated signal package comprising an identifier gives this signal transmitting module and sends, respectively this tire pressure detection The identifier of device is different from the identifier of other tire pressure detectors；And

One receiver, is arranged in this vehicle, for receiving the signal envelope that described tire pressure detector sends Bag, and the identifier that interpretation acquirement is corresponding；

Thus, this receiver is given when each this tire pressure detector sends this signal package according to a predefined procedure Time, this receiver is according to the order of the described signal package of reception, by this mark in described signal package Symbol sets the position of corresponding respectively this tire.

2. radio tire pressure monitoring system as claimed in claim 1, wherein these vibrations sensing module is shake Dynamic sensor.

3. radio tire pressure monitoring system as claimed in claim 1, wherein these vibrations sensing module is first detectd Measure this tire speed per hour not less than after 20 kilometers, then when sensing the amplitude more than this predetermined value, This processor i.e. transmits this signal package and gives this signal transmitting module.

4. radio tire pressure monitoring system as claimed in claim 1, wherein, this tire pressure sensing module in After sensing the tire pressure of this tire, produce a corresponding tire pressure and be transferred to this processor, this process This tire pressure and this identifier are compiled into this signal package and give this signal transmitting module by device in the lump Send.

5. it is applicable to a code method of automatically learning for the radio tire pressure monitoring system of claim 1, in order to Being matched the position of respectively this tire pressure detector with respectively this tire, respectively this is taken turns to make described identifier correspondence Tire is also recorded in this receiver, and this learns code method automatically, and to comprise step as follows:

A, make each this tire or respectively this tire pressure detector expose to the position of respectively this tire and make a reservation for according to this Order produces vibrations, and makes the vibrations sensing module of respectively this tire pressure detector sequentially sense pre-more than this The amplitude of fixed number value；

B, respectively this tire pressure detector send this signal package and give this receiver；

The signal package that C, this receiver received in sequence respectively this tire pressure detector send, by respectively this tire pressure Detector matches with respectively this tire.

6. the code method of automatically learning of radio tire pressure monitoring system as claimed in claim 5, wherein in this Step A arranges at least one suitable roadblock, and drives this vehicle so that respectively this tire makes a reservation for suitable according to this Sequence produces vibrations with this roadblock.

7. the code method of automatically learning of radio tire pressure monitoring system as claimed in claim 5, wherein in step Rapid A can be again make each this tire or respectively this tire pressure detector to expose to the position of respectively this tire pre-according to this Definite sequence produces vibrations, and makes the vibrations sensing module of respectively this tire pressure detector sequentially sense more than being somebody's turn to do During the amplitude of predetermined value, this processor i.e. transmits this signal package and gives this signal transmitting module, this letter Number sending module i.e. sends this signal package and gives this receiver.

8. the code method of automatically learning of the radio tire pressure monitoring system as described in claim 5 or 7, wherein In step A use an instrument according to this predefined procedure beat respectively this tire or respectively this tire pressure detector expose to Respectively the position of this tire is to produce vibrations.