WO2009117933A1 - Tire burst detecting device, detecting system and detecting method for vehicle tire - Google Patents

Abstract

A tire burst detecting device for vehicle tire, which is used for detecting a tire burst signal, wherein the detecting device comprises a signal source (2) and a detecting element (3). The signal source (2) is mounted in the closed cavity or on the outside of the cavity wall of the tire (1). The detecting element (3) is mounted on the bracket of a wheel (12) for detecting the signal from the signal source (2) and the signal is transmitted to a control center unit (4) by wire. If the tire pressure is normal, the signal source (2) is located in the first position, and if the tire burst happens, the distortion of the tire (1) makes the signal source (2) deviate from the first position to the second position, so that the detecting element (3) can detect the variation of the signal from the signal source (2).

Description

 Vehicle tire puncture detecting device, detecting system and detecting method

 The present invention relates to a vehicle safety technology, and more particularly to a vehicle tire puncture detecting device, a detecting system and a detecting method for securing a vehicle after a tire puncture. Background technique

 At present, the method for detecting tire puncture in a car is to transmit the tire tire puncture signal detected by the pressure sensing device to the vehicle control center unit (ECU) by wirelessly transmitting the pressure sensing device mounted on the tire. Then, the car control center unit (ECU) commands the various actuators according to the received tire puncture signal to ensure the safety of the car after the tire bursts.

 However, the above-mentioned puncture detection system has the following problems:

 1. The pressure sensing device installed on the tire of the car has a large volume and a large mass. Therefore, the centrifugal force generated when the wheel rotates at a high speed is also large, which seriously affects the dynamic balance of the wheel and affects the driving of the car. Safety and stability;

 2. Since the pressure sensing device transmits the tire puncture signal to the car control center unit (ECU) by wireless transmission, it needs power supply (such as battery), which has the problem of battery life;

 3. Because the tire temperature rises greatly when the car is driving at high speed in summer (nearly 80~10(TC), this requires the electrical components of the pressure sensing device to have higher stability to temperature changes, so the cost is higher. .

 4. The pressure sensing device transmits the puncture signal to the car control center unit (ECU) by means of wireless transmission. The puncture signal transmission may be failed due to external electromagnetic signal interference, and the delay may not be guaranteed. Summary of the invention

 SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle tire puncture detecting device, a detecting system and a detecting method which do not affect the dynamic balance of the wheel and are not affected by the power source.

 To this end, the technical solution of the present invention comprises: a vehicle tire puncture detecting device for detecting a tire puncture signal, the detecting device comprising a signal source and a detecting element, wherein the signal source is located in a closed tire cavity of the tire Or on the outside of the cavity wall, the detecting component is mounted on the wheel bracket for detecting the signal of the signal source and transmitting to the control center unit by wire. When the tire pressure is normal, the signal source is located at the first position; At the time of the tire, the tire is deformed to cause the signal source to leave the first position and reach the second position, thereby causing the detecting element to detect a change in the signal of the signal source.

The invention also provides a vehicle tire puncture detecting system, comprising the above detecting device, a control center unit, An execution device connected to the output end of the control center unit via a signal line, wherein the control center unit is preset with a range of the puncture signal, and the detecting component and the executing device of the detecting device are respectively connected to the control center unit through a signal line, The control center unit receives the detection signal output by the detecting component, and if the detection signal is within the range of the puncture signal, issues an execution command to the executing device.

 The invention also provides a vehicle tire puncture detecting method, which comprises:

 A signal source is installed in the closed tire cavity of the vehicle tire or outside the cavity wall, and a detecting component is disposed on the signal source. When the tire pressure is normal, the signal source is in the first position; when the tire blow occurs, the signal is generated. The source energy can be moved to the second position, that is, the distance between the source and the detecting element changes;

 Presetting a range of puncture signals in the control center unit;

 The detecting component detects a signal of the signal source and transmits the signal to the control center unit in a wired manner;

 The control center unit receives the detection signal and compares it to the range of the puncture signal: when the detection signal is within the range of the puncture signal, the control center unit issues an instruction to the executing device to stabilize the driving state of the vehicle.

 The invention detects the occurrence of the puncture by detecting the signal change of the signal source during the normal tire tire pressure and the tire puncture, so that the permanent magnet maintains a certain distance from the Hall sensor during the normal operation of the tire, and after the tire is puncture As the tire pushes and pushes, the distance between the permanent magnet and the Hall sensor changes, the electric signal generated by the Hall sensor changes, and the result of the tire puncture is known, and then the electric signal generated by the Hall sensor through the signal line is transmitted to The control center unit, in order to control the control of the executing device by the central unit, has the following advantages:

 1. The permanent magnets located in the closed tire cavity and mounted on the outer peripheral surface of the rim are of low quality and will not affect the dynamic balance of the wheel;

 2. It does not need to be powered, and is not affected by the power supply;

 3. It is almost independent of temperature changes;

 4. The transmission of the tire puncture signal is output to the control center unit through wired transmission, which has high reliability.

5. Its function is not affected by road conditions, etc., and the detection effect is sensitive. The fixed connecting device adopts a clamp that is fixed on the outer peripheral surface of the rim, and the swing rod seat is fixedly mounted on the clamp, and the installation is convenient, and the wheel dynamic balance is not affected.

 6. The pendulum rod resetting device enables the invention to be used multiple times and has a long service life. DRAWINGS

 The accompanying drawings, which are incorporated in and constitute in the In the drawings: Fig. 1 is a schematic view showing the structure of a first embodiment of the present invention when the tire pressure is normal.

Fig. 1A is a schematic view showing the structure of a first embodiment of the present invention in the event of a puncture. Fig. 2 is a schematic view showing the structure of the second embodiment of the present invention when the tire pressure is normal.

 Fig. 2A is a schematic view showing the structure of a second embodiment of the present invention in the event of a puncture.

 Fig. 2B is a schematic view showing the structure of a clip used in the second embodiment of the present invention.

 2C is a schematic view showing the structure of the clip of FIG. 2B after being placed on the rim.

 2D is a cross-sectional view of a permanent magnet device employed in a second embodiment of the present invention.

 Figure 3 is a cross-sectional view showing a puncture detecting device in a third embodiment of the present invention;

 Fig. 3A is a schematic view showing the structure of the third embodiment of the present invention when the tire pressure is normal.

 Fig. 3B is a schematic view showing the structure of a third embodiment of the present invention in the event of a puncture. detailed description

 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The drawings are merely schematic and are not drawn to scale. In the drawings, the same reference numerals are used to describe the same or similar components and the like.

 The invention relates to a vehicle tire puncture detecting device for detecting a tire puncture signal, comprising a signal source and a detecting component, wherein the signal source is located in a closed tire cavity of the tire or outside the cavity wall, the detecting The component is mounted on the wheel bracket for detecting a signal of the signal source. When the tire pressure is normal, the signal source is located at the first position; when a tire blow occurs, the tire is deformed to cause the signal source to leave the first position and reach the first The two positions are such that the detecting element detects a change in the signal of the signal source, and the detecting element detecting the change of the signal outputs a puncture signal. The present invention also relates to a detection system and a detection method using the tire puncture detecting device. The present invention can employ various detecting elements and signal sources to implement corresponding technical solutions. For the sake of clarity, the present invention will be generally described in the context of a detecting device in which a Hall sensor and a permanent magnet are used.

 The sensing receiving end of the Hall sensor is directed to the contact point of the tire with the ground; when the tire pressure is normal, the permanent magnet device is located at the first position, and the Hall sensor detects the magnetic signal of the first position of the permanent magnet device; After the occurrence, the tire is deformed such that the permanent magnet device leaves the first position to reach the second position, the Hall sensor detects the second position magnetic signal of the permanent magnet device, and the Hall sensor detecting the change outputs the puncture signal.

As shown in FIG. 1 and FIG. 1A, FIG. 1 is a schematic structural view of a vehicle tire puncture detecting device and a detecting system according to a first embodiment of the present invention, the detecting device including a permanent magnet device fixed to the inner side of the cavity wall of the tire 1 or the outer side of the cavity wall. 2 and a Hall sensor 3 mounted on the wheel bracket 12 for receiving a magnetic signal from the permanent magnet device 2, the sensing receiving end of the Hall sensor 3 is directed to the contact point of the tire and the ground, and the output of the Hall sensor 3 is passing the signal line 71 is connected to the control center unit. The power of the control center unit (ECU) comes from the battery 6 connected by wires. In use, the permanent magnet device 2 can be fixed to the inner side surface or the outer side surface of the side wall of the tire 1, ensuring that the ground 8 and the rim are received. When the tire 1 is deformed by the pressing action of the tire 1, the permanent magnet device 2 can be moved from the tire side to the Hall sensor 3, so that the control center unit acquires the puncture signal and realizes effective control of the vehicle by the executing device.

 The Hall sensor can be fixed to the wheel bracket 12 by means of a fixing screw, so that the induction receiving end of the Hall sensor 3 is directed to the contact point of the tire with the ground, and is located at the contact point of the tire 1 with the ground 8 and the axis of rotation of the wheel. On the plane, to ensure the reliability of signal reception.

 The actuating device 5 may include a puncture stabilizing device for stabilizing the steering of the vehicle and an automatic decelerating device for controlling the braking of the vehicle to solve the problem of vehicle deflection and driver transient reaction occurring after the tire of the vehicle tire is blown, thereby greatly Improve the safety of vehicles after tire tires are blown up.

 Correspondingly, as shown in FIG. 1 and FIG. 1A, the flat tire detecting system of the embodiment includes the foregoing detecting device, a control center unit (ECU) 4 and an executing device 5, wherein the control center unit 4 presets a detection signal range. The detecting component and the executing device 5 of the detecting device are respectively connected to the control center unit via signal lines 71, 7. The control center unit 4 receives the detection signal output by the detecting component, and if the detection signal is within the range, The executing device 5 issues an execution command.

 In addition, the present invention also provides a vehicle tire puncture detection method, which includes:

 Mounting a signal source in the closed tire cavity of the vehicle tire or outside the cavity wall, and providing a detecting component to the signal source, the signal source can be moved to change the distance between the detecting component and the detecting component when the tire burst occurs, thereby Causing a change in the signal detected by the detecting element;

 Presetting a range of puncture signals in the control center unit;

 The detecting component detects a signal of the signal source and transmits the signal to the control center unit;

 The control center unit receives the detection signal and compares it to the range of the puncture signal: when the detection signal is within the range of the puncture signal, the control center unit issues an instruction to the executing device to stabilize the driving state of the vehicle.

 As shown in FIG. 1 and FIG. 1A, the magnetic signal emitted by the permanent magnet device 2 is inductively received by the Hall sensor 3, and the magnetic signal is received by the Hall sensor 3 according to the change in distance from the permanent magnet device 2. The generated pulse signal is input to the control center unit through the signal line 71, and is outputted after being detected and processed by the control center unit, and sent to the execution device such as the puncture stabilization device and the automatic deceleration device through the signal line 7 to be converted into a stable vehicle control device. Working status.

 The working principle of the vehicle tire puncture detecting device is as follows:

As shown in FIG. 1, when the air pressure of the vehicle tire 1 is normal, when the permanent magnet device 2 is turned to the ground 8 with the wheel, the distance between the permanent magnet device 2 and the sensing end of the Hall sensor 3 is , _ι , and the Hall sensor 3 at this time The pulse voltage signal generated according to the received magnetic signal from the permanent magnet device 2 is V, and the pulse voltage signal is transmitted through the signal line. Delivered to the control center unit, the control center unit compares the signal with a preset range of the puncture signal to determine whether the signal is normal. Since the signal is normal, the control center unit has no command output, and the puncture stabilization device Execution devices such as automatic deceleration devices do not work;

As shown in FIG. 1A, when the tire 1 of the vehicle is puncture, when the permanent magnet device 2 is turned to the ground 8 with the wheel, the tire of the vehicle is squeezed so that the distance between the permanent magnet device 2 and the sensing end of the Hall sensor 3 becomes r. ₂ , at this time, the Hall sensor 3 generates a pulse voltage signal value of Vr ₂ according to the magnetic signal emitted by the permanent magnet device 2, and transmits the pulse voltage signal to the control center unit through the signal line, and the control center unit The pulse voltage signal is compared with a preset range of the puncture signal to determine whether the signal is normal. Since the signal is abnormal at this time, the pulse voltage signal is located in the range of the puncture signal, and therefore, the control center unit determines that the explosion occurs. The tire, and an instruction is issued to the actuator 5, and the actuator 5 (such as a puncture stabilization device and an automatic deceleration device) is quickly turned into an operating state to stabilize the running state of the vehicle.

During the whole operation of the vehicle tire puncture detecting device, the control center unit compares the pulse electric signal value (such as the pulse voltage signal value, but not limited thereto) generated by the received Hall sensor with a preset value. To judge the vehicle puncture, the principle of judging the tire puncture is as follows - r ₂ in Fig. 1 and Fig. 1A respectively indicate that the permanent magnet device 2 is in the first position and the second position (ie, the tire pressure of the vehicle tire 1 is normal and the tire blasts The distance from the sensing end of the Hall sensor 3 to the permanent magnet device 2 fixed to the sidewall of the tire 1 in this embodiment, in this embodiment, it is apparent that the sensing end of the Hall sensor 3 and the permanent magnet device when the vehicle tire pressure is normal _Γι distance between the tires is greater than 2 between the puncture Houhuo Er sensor senses the end of the permanent magnet 3 apparatus r _2.

 The Hall sensor 3 generates a pulse voltage signal value of V according to the magnetic signal emitted from the permanent magnet device 2.

= k / r ² (k is a constant), then correspondingly, V _ri <Vr _{2 ;} in the specific application of the present invention, the range value of the pre-set puncture parameter of the control center unit can be in V _ri +2 (Vr ₂ -V _ri ) /3 and Vr ₂ , so that when the value of the pulse voltage signal generated by the Hall sensor 3 is within this value range, the control center unit can determine that the tire is in a puncture state, otherwise it is normal. 2 and 2A are schematic views showing the structure of a second embodiment of the tire tire puncture detecting device of the present invention. The detecting device of this embodiment includes a permanent magnet device 2 mounted on an outer circumferential surface of a rim 11 that closes a tire cavity, and a Hall sensor 3 corresponding to the permanent magnet device 2. The Hall sensor 3 is fixed to the wheel bracket 12, and the sensing receiving end of the Hall sensor 3 is directed to the contact point of the tire with the ground; the permanent magnet device 2 includes a fixing seat 21 fixed to the rim 11 and movably mounted on the fixed Permanent magnet 22 on the seat. When the tire is working properly, The fixing seat 21 keeps the permanent magnet 22 at a certain distance from the Hall sensor 3, and can support the permanent magnet to have a certain displacement amount to ensure that the permanent magnet 22 can be squeezed by the tire deformation when the tire is blasted. The action moves to the Hall sensor 3.

 The fixing base 21 is fixed on the rim 11 by a fixing connecting device, and the fixing connecting device can fix the clamp 40 fixed on the outer circumferential surface of the rim 11, as shown in FIG. 2B and FIG. 2C, the fixing seat 21 is fixed (such as welding). On the clamp 40, after the clip 40 with the permanent magnet device 2 is sleeved on the outer circumference of the rim 11, the two end portions can be fastened by screws, preferably, the mounting position and the clamp of the fixing seat 21 are The position of the fastening end of 40 is symmetrical with respect to the axis of rotation of the wheel to ensure a balance of wheel rotation.

 In this embodiment, in order to ensure the effective operation of the detecting device, the permanent magnet 22 is away from the Hall sensor 3 when the tire pressure is normal, and is close to the Hall sensor 3 when the tire is in a tire burst. The fixing seat 21 is preferably In the form of a mounting cylinder, as shown in FIG. 2D, the permanent magnet 22 is firmly mounted in the magnetic steel sleeve 24 and is screwed into the mounting cylinder cavity through the housing 23, and the end away from the rim 11 extends out of the housing 23. When subjected to an external force, the permanent magnet 22 can move inward with the magnetic steel sleeve 24; in addition, a spring that pushes the permanent magnet 22 away from the rim 11 to maintain a certain distance from the Hall sensor can be disposed in the mounting cylinder cavity (Fig. (not shown), or in the installation cylinder cavity is provided with a way to clamp the permanent magnet 22 to keep the permanent magnet away from the rim 11 to maintain a certain distance from the Hall sensor (such as rubber clamping ring) (Figure These structures are simple and effective.

 Similar to the previous embodiment, a mounting seat can be disposed on the wheel bracket 12, and the Hall sensor is fixed to the mounting seat of the wheel bracket 12 by a fixing screw, so that the sensing end of the Hall sensor 3 is directed to the contact point between the tire and the ground. It is preferably located on the plane of contact between the tire 1 and the ground 8 and the axis of rotation of the wheel (or on the plane of revolution of the permanent magnet device about the axis of the wheel) to ensure reliability of signal reception. The output of the Hall sensor 3 is connected to the control center unit via a signal line 71. The power of the control center unit is from the vehicle battery 6 connected by wires, and the actuator 5 may include a puncture stabilization device for stabilizing the steering of the vehicle and for controlling the vehicle. The automatic deceleration device for braking solves the problem of vehicle deflection and the driver's excessive reaction after the tire tire is smashed, thereby greatly improving the safety of the vehicle after the tire is punctured.

 As shown in FIG. 2 and FIG. 2A, the magnetic signal emitted by the permanent magnet 22 is inductively received by the Hall sensor 3, and the Hall sensor 3 is generated by the strength of the magnetic signal according to the change in distance from the permanent magnet 22. The pulse electric signal is input to the control center unit through the signal line 71, and is outputted by the control center unit after being judged, and then sent to the execution device such as the puncture stabilization device and the automatic deceleration device through the signal line 7, so that the control device is stabilized. Working status.

A detailed description of the puncture detecting device in connection with the embodiment and the previous embodiment regarding the detecting system and the detecting For the description of the measurement method, the detection system and the detection method of the aforementioned puncture detecting device of the present embodiment can be clearly understood by those skilled in the art, and therefore, details are not described herein again.

 In this embodiment, the working principle of the puncture detecting device is as follows:

 As shown in FIG. 2, when the air pressure of the tire 1 is normal, the permanent magnet 22 is turned with the wheel rim 11 at the contact point of the tire and the ground 8, and the distance between the permanent magnet 22 and the sensing end of the Hall sensor 3 is, at this time, Hall. The sensor 3 generates a pulse voltage signal value V according to the magnetic signal emitted from the permanent magnet 22, and transmits the signal to the control center unit 4 through the signal line 71, and the control center unit 4 transmits the signal with a preset explosion. Comparing the tire parameters, it is determined whether the signal is normal. Since the signal is normal at this time, the control center unit has no command output, and the execution device such as the puncture stabilization device and the automatic deceleration device does not work.

As shown in FIG. 2A, when the tire 1 is blown, the permanent magnet 22 is turned to the point where the tire is in contact with the ground 8 as the wheel rim 11 is pressed, and the vehicle tire is pushed to push the permanent magnet 22 toward the wheel rim 11 to make the permanent magnet 22 Located at the second position, the distance from the sensing end of the Hall sensor 3 is r ₂ . At this time, the Hall sensor 3 generates a pulse voltage signal value of Vr ₂ according to the magnetic signal emitted from the permanent magnet 22, and passes the signal line 71. The signal is sent to the control center unit, and the control center unit compares the signal with a preset puncture parameter to determine whether the signal is normal. Because the signal is abnormal at this time, the control center unit issues an instruction to execute the device (such as a burst). The tire stabilizing device and the automatic deceleration device are quickly turned into a working state to stabilize the running state of the vehicle.

 During the whole operation of the puncture detecting device, the control center unit determines whether the vehicle has a puncture according to the value of the pulse voltage signal generated by the received Hall sensor and compares the preset value, and determines the tire puncture principle. as follows:

2, 2A, r ₂ respectively indicate that the permanent magnet device 2 is located at the first position and the second position (i.e., the vehicle tire 1 is at a normal pressure and the tire is puncture) from the sensing end of the Hall sensor 3 to the permanent magnet 22. Distance, it is apparent that the distance between the sensing end of the Hall sensor 3 and the permanent magnet 22 when the vehicle tire pressure is normal is greater than the distance r2 between the sensing end of the Hall sensor 3 and the permanent magnet 22 _{after the} tire puncture.

The value of the pulse voltage signal generated by the Hall sensor 3 according to the magnetic signal emitted by the receiving permanent magnet 22 is V=k/r ² (k is a constant), then V _ri <Vr _{2 ; in} specific applications, the control center unit can be The range value of the puncture parameter is set between V _ri +2 (Vr ₂ -V _ri ) /3 and Vr ₂ (but is not limited thereto), so that the pulse voltage signal value generated by the Hall sensor 3 is in the value range. In the case of inside, the control center unit can determine that the tire is in a puncture state, otherwise it is normal. 3 to FIG. 3B, which is a schematic structural view of a third embodiment of a vehicle tire puncture detecting device according to the present invention. The flat tire detecting device of the embodiment includes a permanent magnet device 2 for closing the outer circumferential surface of the rim 11 in the tire cavity, and a Hall sensor 3 corresponding to the permanent magnet device. The manner of setting the Hall sensor of the embodiment can be The second embodiment is the same, that is, fixed on the wheel bracket 12, the sensing receiving end is directed to the contact point between the tire and the ground, and the Hall sensor 3 is correspondingly disposed on the plane of the permanent magnet 22 about the wheel axis to ensure reliable signal reception. The main difference between this embodiment and the previous embodiment is that the structure of the permanent magnet device is different. In this embodiment, the permanent magnet device 2 is realized by a swing rod structure, that is, the swing rod seat 21 is used as a fixed seat, and the swing rod base 21 is provided with a rotating shaft 28, and the rotating shaft 28 is mounted with the rotating shaft 28 a swinging pendulum rod 26, and the swing rod 26 is fixedly mounted with a permanent magnet 22 near one end of the rim 11, and the other end of the swing rod 26 is protruded radially upward from the edge of the rim 11 to facilitate deformation after the tire is broken. The tire can effectively push the swing lever 26; in addition, the swing lever resetting device 25 can be connected to the swing lever 26 to return to the original position after the tire is replaced and continue to be used.

 Referring to the previous embodiment, the fixed connecting device may be a clamp 40 fixed on the outer peripheral surface of the rim 11, and the swing lever seat 21 is fixedly mounted on the clamp 40. Preferably, the mounting position and the fixed card of the swing lever seat 21 are fixed. The position of the fastening end of the hoop 40 is symmetrical with respect to the axis of rotation of the wheel to ensure the balance of the rotation of the wheel.

 In this embodiment, the swing rod resetting device 5 can be two tension springs mounted between the swing rod seat 21 and the clamp 40 to ensure that the permanent magnet device 2 can be kept in the correct position during the tire rotation, and can It can be used many times; of course, other elastic originals such as torsion springs or torsion bar springs can also be used, which have the same technical effects as the tension springs.

 As in the previous embodiment, the output of the Hall sensor 3 is connected to the control center unit via the data line 71. The power of the control center unit is from the vehicle battery 6 connected by wires, and the actuator 5 may include a tire blower for stabilizing the steering of the vehicle. The device and the automatic deceleration device for controlling the braking of the vehicle are used to solve the problem of vehicle deflection and the driver's excessive reaction after the tire tire is smashed, thereby greatly improving the safety of the vehicle after the tire is punctured.

 As shown in FIG. 3A and FIG. 3B, the magnetic signal emitted by the permanent magnet 22 is inductively received by the Hall sensor 3, and the Hall sensor 3 is generated by the strength of the magnetic signal according to the change in distance from the permanent magnet 22. The pulse electric signal is input to the control center unit 4 through the signal line 71, and is outputted by the control center unit 4, and is sent to the execution device 5 such as the puncture stabilization device and the automatic deceleration device through the signal line 7 to be controlled. The vehicle is in a stable working condition.

 With reference to the detailed description of the puncture detecting device in the present embodiment and the description of the detecting system and the detecting method in the previous embodiment, those skilled in the art can clearly understand the detecting system and the detecting of the aforementioned puncture detecting device to which the present embodiment is applied. The method, therefore, will not be described here.

 The working principle of the puncture detecting device of this embodiment is as follows:

As shown in FIG. 3A, when the tire pressure of the vehicle tire 1 is normal, the permanent magnet 22 is turned to the wheel with the wheel rim 11 When the tire is in contact with the ground 8, the distance between the permanent magnet 22 and the sensing end of the Hall sensor 3 is such that the pulse voltage signal generated by the Hall sensor 3 according to the magnetic signal emitted from the permanent magnet 22 is V, and the signal is passed. Line 71 delivers the signal to control center unit 4, which compares the signal to a pre-set puncture parameter value to determine if the signal is normal, so that the signal is normal, control center unit 4 has no command output, and bursts The actuator 5 such as the tire stabilizer and the automatic speed reduction device does not operate.

As shown in FIG. 3, after the tire 1 is blown, the permanent magnet 22 is rotated with the wheel rim 11 at the contact point of the tire and the ground 8, and the tire is pushed to push the swing lever 26 to rotate about the rotating shaft 28, so that the permanent magnet 22 is away from the fire. The sensor 3 has a sensing end distance r ₂ therebetween. At this time, the Hall sensor 3 generates a pulse voltage signal value of Vr ₂ according to the magnetic signal emitted from the permanent magnet 22, and passes the signal line 71. The signal is sent to the control center unit, and the control center unit compares the signal with a preset value to determine whether the signal is normal. Since the signal is abnormal at this time, the control center unit 4 issues an instruction to execute the device 5 (such as a tire blown stable). The device and the automatic deceleration device are quickly turned into a working state to stabilize the running state of the vehicle.

 During the whole operation of the puncture detecting device, the control center unit determines the puncture of the vehicle according to the value of the pulse voltage signal generated by the received Hall sensor and the value of the preset puncture parameter, and determines the tire puncture. The principle is as follows:

In FIG. 3A and FIG. 3B, r ₂ respectively indicates that the permanent magnet device 2 is located at the first position and the second position (ie, the vehicle tire 1 is normal in pressure and after the tire is puncture) from the sensing end of the Hall sensor 3 to the permanent magnet 22 The distance between the sensing end of the Hall sensor 3 and the permanent magnet 22 when the vehicle tire pressure is normal is the distance r ₂ between the sensing end of the Hall sensor 3 and the permanent magnet 22 after the tire puncture.

 The pulse voltage signal value generated by the Hall sensor 3 based on the received magnetic signal from the permanent magnet 22 is V.

= k / r ² (k is a constant), then V _ri > Vr _{2 ; In the} present invention, with reference to the foregoing embodiment, a puncture parameter can be set in advance by the control center unit, since in the present embodiment, when the tire pressure is normal The distance between the permanent magnet and the sensing end of the Hall sensor is the shortest. Therefore, the range value of the puncture parameter of the control center unit can be set between V — (Vr −Vr ₂ ) /3 and Vr ₂ (but is not limited thereto). ), where the pulse voltage signal value generated by the Hall sensor 3 is within the set parameter range, the control center unit can determine that the tire is in a flat tire state, otherwise it is normal.

 The above description of the exemplary embodiments of the present invention has been provided for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many variations and modifications will be apparent to those skilled in the art. The exemplary embodiments were chosen and described in order to best explain the principles of the invention, Variant. The scope of the invention is intended to be defined by the appended claims

Claims

Claim A vehicle tire puncture detecting device for detecting a tire puncture signal, the detecting device comprising a signal source and a detecting component, wherein the signal source is located in a closed tire cavity of the tire or outside the cavity wall, the detecting component Mounted on the wheel bracket, used to detect the signal of the signal source and transmitted to the control center unit by wire. When the tire pressure is normal, the signal source is in the first position; when a tire blow occurs, the tire is deformed to make the signal The source leaves the first position and reaches the second position such that the detection element detects a change in the signal of the signal source.  2. The vehicle tire puncture detecting device according to claim 1, wherein the signal source is a permanent magnet device, the detecting element is a Hall sensor, and the sensing receiving end of the Hall sensor is directed to the tire and the ground. Contact point direction; when the tire pressure is normal, the permanent magnet device is located at the first position, the Hall sensor detects the magnetic signal of the permanent magnet device to generate a first pulse electrical signal value; when the tire burst occurs, the tire is deformed The permanent magnet device leaves the first position to reach the second position, and the Hall sensor detects a magnetic signal of the permanent magnet device to generate a second pulse electrical signal value.  3. The vehicle tire flat tire detecting device according to claim 2, wherein the permanent magnet device is fixed to the inner side of the tire cavity wall or the outer side of the cavity wall, and the Hall sensor is disposed at a contact point between the tire and the ground and the wheel In the plane of the axis of rotation.  4. The vehicle tire puncture detecting device according to claim 2, wherein the permanent magnet device is mounted on an outer peripheral surface of a rim that encloses a tire cavity, the permanent magnet device including a fixing seat fixed to an outer circumference of the rim and mounted on The fixing seat is a permanent magnet that can be moved by the deformation deformation of the tire when the tire is blasted; the Hall sensor is located on a plane in which the permanent magnet rotates around the wheel.  The vehicle tire flat tire detecting device according to claim 4, wherein the fixing base is fixed to the rim by a fixed connecting device.  The vehicle tire flat tire detecting device according to claim 5, wherein the fixed connecting device is a clip that is fixed to the outer peripheral surface of the rim, and the fixing base is fixedly mounted on the clip.  The vehicle tire flat tire detecting device according to claim 6, wherein the fixing base is a mounting cylinder, the permanent magnet is installed in the mounting cylinder cavity, and an end of the cylinder is extended away from the rim. When the tire pressure is normal, the permanent magnet is kept at a certain distance from the Hall sensor, and the permanent magnet can be supported to have a certain displacement amount, so as to ensure that the permanent magnet moves to the hoof due to tire deformation and compression during tire blasting. Sensor. The vehicle tire puncture detecting device according to claim 7, wherein the mounting cylinder chamber is provided with a spring that maintains the permanent magnet at a certain distance from the Hall sensor. The vehicle tire puncture detecting device according to claim 7, wherein the cylindrical cavity of the mounting cylinder is provided with an elastic rubber ring capable of clamping a permanent magnet and holding the permanent magnet away from the rim when the tire is normally operated.  The vehicle tire flat tire detecting device according to claim 7, wherein the fixing base is a swing rod seat, the swing rod seat is provided with a rotating shaft, and the rotating shaft is mounted with a tire when the tire is blasted a swinging rod that swings around the rotating shaft under deformation, a permanent magnet is fixedly mounted on one end of the swinging rod near the rim, and the other end of the swinging rod is protruded radially upward from the edge of the rim.  The vehicle tire puncture detecting device according to claim 10, wherein the swing lever is further connected to the swing lever resetting device.  The vehicle tire flat tire detecting device according to claim 11, wherein the swing lever returning device is a torsion spring installed between the fixed seat and the swing lever.  The vehicle tire puncture detecting device according to claim 11, wherein the swing bar restoring device is a tension spring that is mounted between the fixing base and the clip.  A vehicle tire puncture detecting system comprising the detecting device according to any one of claims 1 to 13, a control center unit, and an executing device connected to the output end of the control center unit via a signal line, wherein the control center unit is pre- a bursting signal range is provided, wherein the detecting component and the executing device of the detecting device are respectively connected to the control center unit through a signal line, and the control center unit receives the detection signal output by the detecting component, if the detecting signal is in the range of the puncture signal Then, an execution instruction is issued to the executing device.  A vehicle tire puncture detecting system according to claim 14, wherein said actuating means comprises a puncture stabilizing device and an automatic decelerating device.  16. A vehicle tire puncture detection method, comprising:  A signal source is installed in the closed tire cavity of the vehicle tire or outside the cavity wall, and a detecting component is disposed on the signal source. When the tire pressure is normal, the signal source is in the first position; when the tire blow occurs, the signal is generated. The source energy can be moved to the second position, that is, the distance between the source and the detecting element changes;  Presetting a range of puncture signals in the control center unit;  The detecting component detects a signal of the signal source and transmits the signal to the control center unit in a wired manner;  The control center unit receives the detection signal and compares it to the range of the puncture signal: when the detection signal is within the range of the puncture signal, the control center unit issues an instruction to the executing device to stabilize the driving state of the vehicle. The vehicle tire flat tire detecting method according to claim 16, wherein the signal source is a permanent magnet device, the detecting component is a Hall sensor, and the control center unit is pre-set with a puncture pulse electrical signal range; The Hall sensor generates a pulse electrical signal according to the detected magnetic signal and outputs it to the control center unit when the pulse electrical signal When located within the range of the aforementioned puncture pulse electrical signal, the control center unit issues an instruction to the actuator to stabilize the vehicle's driving state.  The tire tire flat tire detecting method according to claim 17, wherein the permanent magnet device is mounted on an outer circumference of the rim, and a distal end thereof protrudes radially from an edge of the rim when the tire air pressure is normal. The permanent magnet device includes a fixed seat and a permanent magnet that is movable relative to the fixed seat in a radial direction of the rim.  The tire tire flat tire detecting method according to claim 17, wherein the permanent magnet device is mounted on an outer circumference of the rim, and a distal end thereof protrudes radially from an edge of the rim when the tire air pressure is normal. The permanent magnet device includes a fixed seat and a permanent magnet, and the permanent magnet can swing along a rotating shaft on the fixed seat in a plane of rotation of the wheel.  The vehicle tire flat tire detecting method according to claim 18, wherein the fixing base comprises a swing rod seat and the rotating shaft of the upper end thereof, and a swing rod is pivotally disposed on the rotating shaft, the permanent magnet The component is disposed at an end of the swing bar adjacent to the rim.