CN112622536A - Vehicle tire working state monitoring and sensing device and method - Google Patents
Vehicle tire working state monitoring and sensing device and method Download PDFInfo
- Publication number
- CN112622536A CN112622536A CN202011558846.9A CN202011558846A CN112622536A CN 112622536 A CN112622536 A CN 112622536A CN 202011558846 A CN202011558846 A CN 202011558846A CN 112622536 A CN112622536 A CN 112622536A
- Authority
- CN
- China
- Prior art keywords
- tire
- strain
- monitoring
- contact
- vertical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000012545 processing Methods 0.000 claims abstract description 25
- 238000004891 communication Methods 0.000 claims abstract description 20
- 238000005259 measurement Methods 0.000 claims abstract description 19
- 230000006641 stabilisation Effects 0.000 claims abstract description 5
- 238000011105 stabilization Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 19
- 230000000087 stabilizing effect Effects 0.000 claims description 9
- 238000004364 calculation method Methods 0.000 claims description 8
- 238000010248 power generation Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000004806 packaging method and process Methods 0.000 claims description 4
- 239000004636 vulcanized rubber Substances 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 claims description 3
- 229910002113 barium titanate Inorganic materials 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 150000004767 nitrides Chemical class 0.000 claims description 3
- 229910052723 transition metal Inorganic materials 0.000 claims description 3
- 150000003624 transition metals Chemical class 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000004134 energy conservation Methods 0.000 abstract 1
- 238000009434 installation Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229920009405 Polyvinylidenefluoride (PVDF) Film Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/06—Signalling devices actuated by deformation of the tyre, e.g. tyre mounted deformation sensors or indirect determination of tyre deformation based on wheel speed, wheel-centre to ground distance or inclination of wheel axle
- B60C23/08—Signalling devices actuated by deformation of the tyre, e.g. tyre mounted deformation sensors or indirect determination of tyre deformation based on wheel speed, wheel-centre to ground distance or inclination of wheel axle by touching the ground
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
- B60R16/0307—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for using generators driven by a machine different from the vehicle motor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/02—Tyres
- G01M17/022—Tyres the tyre co-operating with rotatable rolls
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention relates to a vehicle tire working state monitoring and sensing device and a vehicle tire working state monitoring and sensing method. The device comprises a dynamic sensitive element, a dynamic strain measurement circuit module, a data processing module, a wireless communication module, a power supply module and a current stabilization power storage module. The device can acquire the strain information of the inner surface of the tire in the transverse direction, the longitudinal direction and the vertical direction, and provides more comprehensive data to reflect the working state of the tire; according to the strain information, working state parameters such as contact stress, grounding area, driving force, driving torque, lateral force, slip ratio and the like of the vehicle tire are obtained; the device has the advantages of small volume, convenient installation, energy conservation and emission reduction, realizes the passive power supply and wireless transmission of the working state parameters of the tire, and provides basic data for improving the safety and dynamic property of the vehicle.
Description
Technical Field
The invention belongs to the field of sensor measurement, and particularly relates to a vehicle tire working state monitoring and sensing device and method.
Background
Most current vehicle tires are passive rubber components and the lack of information provided by the tire during travel is a hot issue in the industry and research. The detection and sensing technology aiming at the parameters such as pressure and temperature in the tire is mature, and the acquisition of other working state parameters of the tire contacting with the ground or soil by detecting strain is a difficult point.
Foreign research institutions have made a great deal of research on the collection of parameters of intelligent tires. The japanese company pleistone has issued a new technology called "intelligent strain sensor" for measuring the stress variation when the tire is in contact with the road surface, estimating the axle load and the tire wear by a proprietary algorithm, and this technology is in a locked-up privacy state overseas. Researchers at the university of Jiangsu adopt polyvinylidene fluoride (PVDF) film as a sensitive material to develop a tire surface dynamic strain sensor, but the technology is not mature. The currently used tire detection methods or devices have the following disadvantages: (1) most methods are limited to test bed tests, and detection in vehicle running is difficult to realize; (2) the monitoring parameters of the working state of the tire are single; (3) the strain sensor mostly adopts wired transmission, and the spatial arrangement is inconvenient; (4) the testing device is powered by a battery, and the monitoring duration is limited.
Disclosure of Invention
In view of the above technical problems, an object of the present invention is to provide a device and a method for monitoring and sensing the operating state of a vehicle tire, which can obtain information such as tire contact stress, contact area, driving force, driving torque, lateral force, slip ratio and the like during the running of a vehicle by detecting the strain of the inner surface of the tire, so as to solve the problem of detecting the operating state parameters of the tire during the running of the vehicle, and provide basic data for improving the safety and dynamic performance of the vehicle.
In order to achieve the purpose, the invention provides the following technical scheme:
a vehicle tire operating condition monitoring and sensing device comprising:
and the dynamic sensitive element is used for detecting the contact strain of the inner surface of the tire, converting the strain of the inner surface of the tire into a voltage signal through the built-in resistor and outputting the voltage signal to the dynamic strain measuring circuit module.
The dynamic strain measurement circuit module is used for connecting a built-in strain bridge circuit unit with a dynamic sensitive element on the surface of the tire through a lead; when the vehicle tire is in contact with and extruded with the ground, the strain signal is amplified, filtered and digitally converted in the form of an analog voltage signal and then output to the data processing module.
And the data processing module is used for processing and packaging the strained voltage signal and then sending the voltage signal to the wireless communication module.
And the wireless communication module is used for monitoring the communication between the signals and the PC end and wirelessly transmitting the monitoring signals to the signal receiver connected with the PC end.
The power supply module is used as a power supply of the whole monitoring sensing device and consists of a piezoelectric material 1 and a lead; under the action of vertical extrusion force of the tire, the power generation characteristic of the piezoelectric material is utilized to transmit electric quantity to the current stabilization power storage module, and the dynamic strain measurement circuit module, the data processing module and the wireless communication module are indirectly powered.
And the current stabilizing and power storage module is used for receiving the current generated by the power supply module, is directly connected with the dynamic strain measurement circuit module, the data processing module and the wireless communication module, and plays roles of stabilizing voltage, stabilizing current and storing energy for the whole device.
The dynamic sensitive elements comprise a vertical uniaxial strain gauge 3, a longitudinal uniaxial strain gauge 6 and a transverse uniaxial strain gauge 7 which are adhered to a vulcanized rubber sheet substrate 5 adhered to the inner surface of the tire; the longitudinal uniaxial strain gauges 6 and the transverse uniaxial strain gauges 7 are uniformly arranged on the inner surface of the tire carcass 2, and longitudinal and transverse strain signals of the inner surface of the tire are respectively acquired; the plurality of vertical uniaxial strain gages 3 are uniformly arranged on the inner surfaces of the tire sidewalls 4 on the two sides along the tire circumferential direction, and collect vertical strain signals of the inner surfaces of the tires.
The number of the vertical uniaxial strain gages 3 is even.
The piezoelectric material 1 is in a strip shape and is uniformly arranged on the inner surface of the tire sidewall 4 on both sides in the tire circumferential direction.
The dynamic strain measurement circuit module comprises a strain bridge circuit unit, a signal amplifier, a signal filter and a digital-to-analog conversion unit which are connected in sequence.
The piezoelectric material 1 is two-dimensional transition metal carbon/nitride or barium titanate.
A method of monitoring the operating condition of a vehicle tyre, comprising the steps of:
s1, in the running process of the vehicle, when the tire is in contact with the ground and extruded, monitoring the dynamic strain measurement circuit module of the sensing device, amplifying, filtering and digitally converting the strain signals of the transverse uniaxial strain gauge 7, the longitudinal uniaxial strain gauge 6 and the vertical uniaxial strain gauge 3 of the dynamic sensing element in the form of analog voltage signals, and outputting the signals to the data processing module, processing the strain voltage signals by the data processing module, packaging the signals and transmitting the signals to the signal receiver connected with the PC end through the wireless communication module, and respectively obtaining the transverse contact strain epsilon of the tirexLongitudinal contact strain epsilonyAnd contact strain in the vertical directionz；
S2, monitoring the contact stress of the tire;
the contact stress sigma of the tire in the transverse direction is respectively calculated and obtained through the formulas 1 to 3xContact stress [ sigma ] in the tire longitudinal directionyContact stress σ in the direction perpendicular to the tirez：
σx＝EεxEquation 1
σy＝EεyEquation 2
σz＝EεzEquation 3
Wherein E is the elastic modulus of the tire material and has the unit of GPa; epsilonx、εy、εzThe contact strain of the tire in the transverse direction, the longitudinal direction and the vertical direction is respectively, and the unit is mu epsilon; sigmax、σyAnd σzThe contact stress in the tire transverse direction, the contact stress in the tire longitudinal direction and the contact stress in the tire vertical direction are respectively expressed in MPa.
The method further comprises:
s3, monitoring the tire grounding area;
the tire contact area S is obtained by calculation of formula 4:
wherein R is the tire radius and is expressed in m; b is the tire width in m; d is the maximum vertical strain value max (epsilon) of the tirez) The corresponding sag depth is in m.
The method further comprises:
s4, monitoring tire driving force, lateral force and driving torque;
the tire driving force F is obtained by respectively calculating through a formula 5 to a formula 7yTire side force FxTire drive torque M:
Fy＝Sσyequation 5
Fx＝SσxEquation 6
M＝FyR formula 7
Wherein S is the tire contact area and the unit is m2；σyContact stress in the tire longitudinal direction is expressed in MPa; sigmaxIs the contact stress in the transverse direction of the tire, and has the unit of MPa; r is the tire radius in m; fyIs a tire driving force in units of N · m; fxIs the lateral force of the tire, and has the unit of N.m; m is the tire drive torque, with the unit of N M.
The method further comprises:
s5, monitoring the slip rate of the tire;
the number of the vertical uniaxial strain gauges 3 is even, and two vertical uniaxial strain gauges 3 which are symmetrical to each other are arranged on the same diameter of the inner surface of the tire sidewall 4;
the tire slip ratio Sr is obtained by calculation from equation 8 and equation 9:
wherein Vt is a theoretical speed of the vehicle and is in m/s; va is the actual speed of the vehicle, and the unit is m/s; r is the tire radius in m; t is tpThe time when the contact stress of one vertical uniaxial strain gauge 3, which is a designated timing starting point, reaches the maximum value of the contact stresses in all the vertical uniaxial strain gauges, and the unit is s; t is tqThe time when the contact stress of one vertical uniaxial strain gage 3 having the same diameter as that of one vertical uniaxial strain gage 3 at the specified timing start point reaches the maximum value of the contact stresses in all the vertical uniaxial strain gages is s.
Compared with the prior art, the invention has the beneficial effects that:
1. the vehicle tire working state monitoring and sensing device can acquire the strain information of the inner surface of the tire in the transverse direction, the longitudinal direction and the vertical direction, and provides more comprehensive data for reflecting the working state of the tire; and the volume is small, the arrangement is convenient, and the wireless transmission of signals is realized.
2. The vehicle tire working state monitoring and sensing device utilizes the vertical pressure of the tire side part during running, provides a power supply solution for the whole monitoring and sensing device based on the power generation characteristic of the piezoelectric material, and is a breakthrough progress compared with the traditional tire strain acquisition device.
3. By matching with the monitoring and sensing device, on the basis of obtaining the strain of the inner surface of the tire, a calculation method of other working state parameters of the vehicle tire is provided, and the monitoring and transmission of parameters such as the contact stress, the grounding area, the driving force, the driving torque, the lateral force, the slip ratio and the like of the tire are realized.
Drawings
FIG. 1 is a schematic structural view of a vehicle tire operating condition monitoring and sensing device according to the present invention;
FIG. 2 is a schematic diagram of the power generation principle of the power supply module material of the present invention;
FIG. 3 is a schematic diagram of the dynamic strain measurement circuit module of the present invention;
fig. 4a to 4c are schematic views showing the arrangement of the dynamic sensing element on the inner surface of the tire according to the present invention.
Wherein the reference numerals are:
1 piezoelectric material 2 tyre body
3 vertical single-axis strain gauge 4 tire side wall
5 longitudinal uniaxial strain gauge of vulcanized rubber sheet substrate 6
7 transverse uniaxial strain gage
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
As shown in FIG. 1, the vehicle tire working state monitoring and sensing device of the invention comprises a dynamic sensitive element, a dynamic strain measurement circuit module, a data processing module, a wireless communication module, a power supply module and a current stabilization and power storage module.
And the dynamic sensitive element is used for detecting the contact strain of the inner surface of the tire. The strain of the inner surface of the tire is converted into a voltage signal through the built-in resistor and then is output to the dynamic strain measuring circuit module.
And the dynamic strain measurement circuit module is connected with the dynamic sensitive element on the surface of the tire through a built-in strain bridge circuit unit of the dynamic strain measurement circuit module and a lead. When the vehicle tire is in contact with and extruded with the ground, the strain signal is amplified, filtered and digitally converted in the form of an analog voltage signal and then output to the data processing module.
As shown in fig. 3, the dynamic strain measurement circuit module includes a strain bridge circuit unit, a signal amplifier, a signal filter, and a digital-to-analog conversion unit, which are connected in sequence. The strain bridge circuit unit is connected with the dynamic sensitive element, and the digital-to-analog conversion unit is connected with the data processing module.
And the data processing module is used for processing and packaging the strained voltage signal and then sending the voltage signal to the wireless communication module.
And the wireless communication module is used for monitoring the communication between the signal and the PC terminal. And the monitoring signal is wirelessly transmitted to a signal receiver connected with the PC terminal.
And the power supply module is used as a power supply of the whole monitoring and sensing device and consists of the piezoelectric material 1 and a lead. As shown in fig. 2, under the action of the vertical extrusion force of the tire, the power generation characteristic of the piezoelectric material is utilized to transmit electric quantity to the current stabilization power storage module, so as to indirectly supply power to the dynamic strain measurement circuit module, the data processing module and the wireless communication module.
The piezoelectric material 1 is two-dimensional transition metal carbon/nitride (MXene) or barium titanate.
As shown in fig. 4a, the piezoelectric material 1 is in a strip shape and is uniformly provided on the inner surface of the tire sidewall 4 on both sides in the tire circumferential direction.
And the current stabilizing and power storage module is used for receiving the current generated by the power supply module, is directly connected with the dynamic strain measurement circuit module, the data processing module and the wireless communication module, and plays roles of stabilizing voltage, stabilizing current and storing energy for the whole device.
As shown in fig. 4a to 4c, the dynamic sensing element includes a vertical uniaxial strain gauge 3, a longitudinal uniaxial strain gauge 6 and a transverse uniaxial strain gauge 7 which are adhered to a vulcanized rubber sheet substrate 5 attached to the inner surface of the tire by glue; the longitudinal uniaxial strain gauge 6 and the transverse uniaxial strain gauge 7 are uniformly arranged on the inner surface of the tire carcass 2, and are used for respectively acquiring longitudinal and transverse strain signals of the inner surface of the tire; the vertical uniaxial strain gauge 3 is uniformly arranged on the inner surfaces of the tire sidewalls 4 at two sides along the circumferential direction of the tire, and collects vertical strain signals of the inner surfaces of the tire. Preferably, the number of the vertical uniaxial strain gages 3 is even.
A vehicle tire working state monitoring method based on the vehicle tire working state monitoring and sensing device comprises the following steps:
s1, in the running process of the vehicle, when the tire is in contact with the ground and extruded, monitoring the dynamic strain measurement circuit module of the sensing device, and simulating the strain signals of the transverse uniaxial strain gauge 7, the longitudinal uniaxial strain gauge 6 and the vertical uniaxial strain gauge 3 of the dynamic sensing element to simulateThe voltage signal form is amplified, filtered and digitally converted and then output to a data processing module, the data processing module processes and encapsulates the strain voltage signal and then sends the strain voltage signal to a signal receiver connected with a PC (personal computer) end through a wireless communication module, and the strain epsilon of the tire in the transverse direction is respectively obtainedxLongitudinal contact strain epsilonyAnd contact strain in the vertical directionz；
And S2, monitoring the contact stress of the tire.
The contact stress sigma in the tire transverse direction is obtained by calculating through the formulas (1) to (3)xContact stress [ sigma ] in the tire longitudinal directionyContact stress σ in the direction perpendicular to the tirez：
σx＝EεxFormula (1)
σy＝EεyFormula (2)
σz＝EεzFormula (3)
Wherein E is the elastic modulus of the tire material and has the unit of GPa; epsilonx、εy、εzThe contact strain of the tire in the transverse direction, the longitudinal direction and the vertical direction is respectively, the unit is mu epsilon, and the contact strain is directly read by a monitoring sensing device; sigmax、σyAnd σzThe contact stress in the tire transverse direction, the contact stress in the tire longitudinal direction and the contact stress in the tire vertical direction are respectively expressed in MPa.
And S3, monitoring the tire ground contact area.
When the vehicle tire runs on the ground, the transverse width of the contact surface of the vehicle tire can be approximately regarded as the width of the tire; the contact surface longitudinal length varies according to changes in vehicle load, travel speed, and road surface conditions.
The tire ground contact area S is obtained by calculation of formula (4):
wherein R is the tire radius and is expressed in m; b is the tire width in m; d is the maximum vertical strain value max (epsilon) of the tirez) The corresponding sag depth is m, and the relationship is obtained through experiments.
And S4, monitoring tire driving force, lateral force and driving torque.
Tire driving force F is obtained by calculation through the formulas (5) to (7)yTire side force FxTire drive torque M:
Fy＝Sσyformula (5)
Fx＝SσxFormula (6)
M＝FyR formula (7)
Wherein S is the tire contact area and the unit is m2；σyContact stress in the tire longitudinal direction is expressed in MPa; sigmaxIs the contact stress in the transverse direction of the tire, and has the unit of MPa; r is the tire radius in m; fyIs a tire driving force in units of N · m; fxIs the lateral force of the tire, and has the unit of N.m; m is the tire drive torque, with the unit of N M.
And S5, monitoring the tire slip rate.
Vehicles travel on soft ground, particularly off-road vehicles such as tractors, where the vehicle tires slip backwards relative to the ground due to the force of soil shear. The contact stress in the tire vertical direction changes with the change of the rolling position of the wheel, and the theoretical speed of the vehicle is calculated according to the change time of the stress peak value.
The number of the vertical uniaxial strain gauges 3 is even, and two vertical uniaxial strain gauges 3 which are symmetrical to each other are arranged on the same diameter of the inner surface of the tire sidewall 4;
the tire slip ratio Sr is obtained by calculation from the formula (8) and the formula (9):
wherein Vt is a theoretical speed of the vehicle and is in m/s; va is the actual speed of the vehicle, and the unit is m/s; r is the tire radius in m; t is tpThe time when the contact stress of one vertical uniaxial strain gauge 3, which is a designated timing starting point, reaches the maximum value of the contact stresses in all the vertical uniaxial strain gauges, and the unit is s; t is tqThe time when the contact stress of one vertical uniaxial strain gage 3 having the same diameter as that of one vertical uniaxial strain gage 3 at the specified timing start point reaches the maximum value of the contact stresses in all the vertical uniaxial strain gages is s.
The above description is for the best mode of carrying out the invention, but the invention is not limited to the above description, and any other changes, modifications, substitutions, and simplifications that are made under the spirit and principle of the invention are all equivalent substitutions included in the protection scope of the invention.
Claims (10)
1. A vehicle tire operating condition monitoring and sensing device, said monitoring and sensing device comprising:
the dynamic sensitive element is used for detecting the contact strain of the inner surface of the tire, converting the strain of the inner surface of the tire into a voltage signal through the built-in resistor and outputting the voltage signal to the dynamic strain measuring circuit module;
the dynamic strain measurement circuit module is used for connecting a built-in strain bridge circuit unit with a dynamic sensitive element on the surface of the tire through a lead; when the vehicle tire is in contact with and extruded with the ground, the strain signal is amplified, filtered and digitally converted in the form of an analog voltage signal and then output to the data processing module;
the data processing module is used for processing and packaging the strained voltage signal and then sending the voltage signal to the wireless communication module;
the wireless communication module is used for monitoring the communication between the signals and the PC end and wirelessly transmitting the monitoring signals to a signal receiver connected with the PC end;
the power supply module is used as a power supply of the whole monitoring sensing device and consists of a piezoelectric material (1) and a lead; under the action of vertical extrusion force of the tire, the power generation characteristic of the piezoelectric material is utilized to transmit electric quantity to the current stabilization power storage module, and the dynamic strain measurement circuit module, the data processing module and the wireless communication module are indirectly powered;
and the current stabilizing and power storage module is used for receiving the current generated by the power supply module, is directly connected with the dynamic strain measurement circuit module, the data processing module and the wireless communication module, and plays roles of stabilizing voltage, stabilizing current and storing energy for the whole device.
2. The vehicle tire operating condition monitoring and sensing device according to claim 1, wherein the dynamic sensor comprises a vertical uniaxial strain gauge (3), a longitudinal uniaxial strain gauge (6) and a transverse uniaxial strain gauge (7) adhered to a vulcanized rubber sheet base (5) adhered to the inner surface of the tire; the longitudinal uniaxial strain gauges (6) and the transverse uniaxial strain gauges (7) are uniformly arranged on the inner surface of the tire carcass (2), and longitudinal and transverse strain signals of the inner surface of the tire are acquired respectively; the vertical uniaxial strain gauges (3) are uniformly arranged on the inner surfaces of the tire side walls (4) at two sides along the circumferential direction of the tire, and vertical strain signals of the inner surfaces of the tire are collected.
3. The vehicle tire operation state monitoring and sensing device according to claim 1, wherein the number of the vertical uniaxial strain gauges (3) is an even number.
4. The vehicle tire operating condition monitoring sensing device according to claim 1, wherein the piezoelectric material (1) is in a strip shape and is disposed uniformly in the tire circumferential direction on the inner surface of the tire side wall (4) on both sides.
5. The vehicular tire operating condition monitoring and sensing device as claimed in claim 1, wherein said dynamic strain measuring circuit module comprises a strain bridge circuit unit, a signal amplifier, a signal filter and a digital-to-analog conversion unit connected in sequence.
6. The vehicle tire operating condition monitoring and sensing device according to claim 1, wherein the piezoelectric material (1) is a two-dimensional transition metal carbo/nitride or barium titanate.
7. A method for monitoring the operating condition of a vehicle tyre with a sensor device according to claims 1 to 6, characterized in that it comprises the following steps:
s1, in the running process of a vehicle, when a tire is in contact with the ground and extruded, monitoring a dynamic strain measurement circuit module of the sensing device, amplifying, filtering and digitally converting strain signals of a transverse uniaxial strain gauge (7), a longitudinal uniaxial strain gauge (6) and a vertical uniaxial strain gauge (3) of the dynamic sensing element in the form of analog voltage signals, and outputting the signals to a data processing module, wherein the data processing module processes the strain voltage signals, encapsulates the signals and sends the signals to a signal receiver connected with a PC (personal computer) end through a wireless communication module, and the contact strain epsilon of the tire in the transverse direction is respectively obtainedxLongitudinal contact strain epsilonyAnd contact strain in the vertical directionz；
S2, monitoring the contact stress of the tire;
the contact stress sigma of the tire in the transverse direction is respectively calculated and obtained through the formulas 1 to 3xContact stress [ sigma ] in the tire longitudinal directionyContact stress σ in the direction perpendicular to the tirez：
σx＝EεxEquation 1
σy＝EεyEquation 2
σz＝EεzEquation 3
Wherein E is the elastic modulus of the tire material and has the unit of GPa; epsilonx、εy、εzThe contact strain of the tire in the transverse direction, the longitudinal direction and the vertical direction is respectively, and the unit is mu epsilon; sigmax、σyAnd σzThe contact stress in the tire transverse direction, the contact stress in the tire longitudinal direction and the contact stress in the tire vertical direction are respectively expressed in MPa.
8. The method of claim 7, further comprising:
s3, monitoring the tire grounding area;
the tire contact area S is obtained by calculation of formula 4:
wherein R is the tire radius and is expressed in m; b is the tire width in m; d is the maximum vertical strain value max (epsilon) of the tirez) The corresponding sag depth is in m.
9. The method of claim 7, further comprising:
s4, monitoring tire driving force, lateral force and driving torque;
the tire driving force F is obtained by respectively calculating through a formula 5 to a formula 7yTire side force FxTire drive torque M:
Fy＝Sσyequation 5
Fx＝SσxEquation 6
M＝FyR formula 7
Wherein S is the tire contact area and the unit is m2；σyContact stress in the tire longitudinal direction is expressed in MPa; sigmaxIs the contact stress in the transverse direction of the tire, and has the unit of MPa; r is the tire radius in m; fyIs a tire driving force in units of N · m; fxIs the lateral force of the tire, and has the unit of N.m; m is the tire drive torque, with the unit of N M.
10. The method of claim 7, further comprising:
s5, monitoring the slip rate of the tire;
the number of the vertical uniaxial strain gauges (3) is even, and two vertical uniaxial strain gauges (3) which are symmetrical to each other are arranged on the same diameter of the inner surface of the tire side wall (4);
the tire slip ratio Sr is obtained by calculation from equation 8 and equation 9:
wherein Vt is a theoretical speed of the vehicle and is in m/s; va is the actual speed of the vehicle, and the unit is m/s; r is the tire radius in m; t is tpThe time when the contact stress of one vertical uniaxial strain sheet (3) which is a designated timing starting point reaches the maximum value of the contact stresses in all the vertical uniaxial strain sheets is s; t is tqThe time when the contact stress of one vertical uniaxial strain gauge (3) with the same diameter as that of one vertical uniaxial strain gauge (3) at the specified timing starting point reaches the maximum value of the contact stresses in all the vertical uniaxial strain gauges is s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011558846.9A CN112622536B (en) | 2020-12-25 | 2020-12-25 | Vehicle tyre working state monitoring and sensing device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011558846.9A CN112622536B (en) | 2020-12-25 | 2020-12-25 | Vehicle tyre working state monitoring and sensing device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112622536A true CN112622536A (en) | 2021-04-09 |
| CN112622536B CN112622536B (en) | 2023-10-31 |
Family
ID=75324958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011558846.9A Active CN112622536B (en) | 2020-12-25 | 2020-12-25 | Vehicle tyre working state monitoring and sensing device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112622536B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113515807A (en) * | 2021-04-21 | 2021-10-19 | 灵耘智能科技(上海)有限公司 | Wheel vertical force detection method and device, electronic equipment and storage medium |
Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005126008A (en) * | 2003-10-27 | 2005-05-19 | Sumitomo Rubber Ind Ltd | Detection method for force applied to tire and pneumatic tire used for it |
| JP2005343281A (en) * | 2004-06-02 | 2005-12-15 | Bridgestone Corp | Method and device for estimating dynamic condition of tire, and tire with sensor |
| CN1719694A (en) * | 2004-07-09 | 2006-01-11 | 米其林技术公司 | Bridge patch for electromechanical transducer elements in tire assemblies |
| CN1733513A (en) * | 2004-08-04 | 2006-02-15 | 米其林技术公司 | Power conversion from piezoelectric source with multi-stage storage |
| JP2006215591A (en) * | 2004-09-06 | 2006-08-17 | Bridgestone Corp | Tire sensor device and tire information transmission method |
| US20070233352A1 (en) * | 2006-03-31 | 2007-10-04 | Naoshi Miyashita | Tire transient response data calculating method, data processing method, tire designing method, vehicle motion predicting method, and tire cornering characteristic evaluation method and evaluation device therefor |
| US20080264327A1 (en) * | 2005-10-05 | 2008-10-30 | Qinetiq Limited | Strain-Responsive Visual Indicator |
| CN101710027A (en) * | 2009-11-24 | 2010-05-19 | 江苏大学 | Non-linear dynamic characteristic monitoring system and method of vehicle tyre |
| CN102069686A (en) * | 2010-12-14 | 2011-05-25 | 吉林大学 | Automobile tire monitoring device based on organic piezoelectric material |
| JP2012162259A (en) * | 2012-03-21 | 2012-08-30 | Technologie Michelin:Soc | Deflection characteristic analysis for tire state |
| US20140277926A1 (en) * | 2013-03-12 | 2014-09-18 | The Goodyear Tire & Rubber Company | Dynamic tire slip angle estimation system and method |
| US20140326062A1 (en) * | 2011-12-29 | 2014-11-06 | Michelin Recherche Et Techniques S.A. | System and method for determining tire uniformity parameters from piezoelectric measurements in the tire counter-deflection zone |
| US9815343B1 (en) * | 2014-06-06 | 2017-11-14 | Iowa State University Research Foundation, Inc. | Tire sensing method for enhanced safety and controllability of vehicles |
| CN107521294A (en) * | 2017-08-31 | 2017-12-29 | 江苏大学 | A kind of TRT of Tire Pressure Monitor System |
| KR20190062791A (en) * | 2017-11-29 | 2019-06-07 | 최병우 | Tire provided with means for sensing a deformation |
| CN110962512A (en) * | 2019-12-24 | 2020-04-07 | 深圳供电局有限公司 | Intelligent monitoring system for automobile tire |
| CN111141206A (en) * | 2020-01-20 | 2020-05-12 | 中国农业大学 | Strain gauge dynamic characteristic detection device and test method thereof |
| JP2020093751A (en) * | 2018-12-14 | 2020-06-18 | 株式会社ブリヂストン | Functional component |
| CN111845775A (en) * | 2020-07-20 | 2020-10-30 | 上海大学 | Joint estimation method for driving state and inertia parameters of distributed driving electric automobile |
| CN214138129U (en) * | 2020-12-25 | 2021-09-07 | 中国农业大学 | Vehicle tyre working state monitoring and sensing device |
-
2020
- 2020-12-25 CN CN202011558846.9A patent/CN112622536B/en active Active
Patent Citations (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005126008A (en) * | 2003-10-27 | 2005-05-19 | Sumitomo Rubber Ind Ltd | Detection method for force applied to tire and pneumatic tire used for it |
| JP2005343281A (en) * | 2004-06-02 | 2005-12-15 | Bridgestone Corp | Method and device for estimating dynamic condition of tire, and tire with sensor |
| CN101001763A (en) * | 2004-06-02 | 2007-07-18 | 株式会社普利司通 | Method and device for estimating dynamic state quantity of tire, and tire with sensor |
| CN1719694A (en) * | 2004-07-09 | 2006-01-11 | 米其林技术公司 | Bridge patch for electromechanical transducer elements in tire assemblies |
| CN1733513A (en) * | 2004-08-04 | 2006-02-15 | 米其林技术公司 | Power conversion from piezoelectric source with multi-stage storage |
| JP2006215591A (en) * | 2004-09-06 | 2006-08-17 | Bridgestone Corp | Tire sensor device and tire information transmission method |
| US20080264327A1 (en) * | 2005-10-05 | 2008-10-30 | Qinetiq Limited | Strain-Responsive Visual Indicator |
| US20070233352A1 (en) * | 2006-03-31 | 2007-10-04 | Naoshi Miyashita | Tire transient response data calculating method, data processing method, tire designing method, vehicle motion predicting method, and tire cornering characteristic evaluation method and evaluation device therefor |
| CN101710027A (en) * | 2009-11-24 | 2010-05-19 | 江苏大学 | Non-linear dynamic characteristic monitoring system and method of vehicle tyre |
| CN102069686A (en) * | 2010-12-14 | 2011-05-25 | 吉林大学 | Automobile tire monitoring device based on organic piezoelectric material |
| US20140326062A1 (en) * | 2011-12-29 | 2014-11-06 | Michelin Recherche Et Techniques S.A. | System and method for determining tire uniformity parameters from piezoelectric measurements in the tire counter-deflection zone |
| JP2012162259A (en) * | 2012-03-21 | 2012-08-30 | Technologie Michelin:Soc | Deflection characteristic analysis for tire state |
| US20140277926A1 (en) * | 2013-03-12 | 2014-09-18 | The Goodyear Tire & Rubber Company | Dynamic tire slip angle estimation system and method |
| US9815343B1 (en) * | 2014-06-06 | 2017-11-14 | Iowa State University Research Foundation, Inc. | Tire sensing method for enhanced safety and controllability of vehicles |
| CN107521294A (en) * | 2017-08-31 | 2017-12-29 | 江苏大学 | A kind of TRT of Tire Pressure Monitor System |
| KR20190062791A (en) * | 2017-11-29 | 2019-06-07 | 최병우 | Tire provided with means for sensing a deformation |
| JP2020093751A (en) * | 2018-12-14 | 2020-06-18 | 株式会社ブリヂストン | Functional component |
| CN110962512A (en) * | 2019-12-24 | 2020-04-07 | 深圳供电局有限公司 | Intelligent monitoring system for automobile tire |
| CN111141206A (en) * | 2020-01-20 | 2020-05-12 | 中国农业大学 | Strain gauge dynamic characteristic detection device and test method thereof |
| CN111845775A (en) * | 2020-07-20 | 2020-10-30 | 上海大学 | Joint estimation method for driving state and inertia parameters of distributed driving electric automobile |
| CN214138129U (en) * | 2020-12-25 | 2021-09-07 | 中国农业大学 | Vehicle tyre working state monitoring and sensing device |
Non-Patent Citations (2)
| Title |
|---|
| 张硕;武仲斌;陈军;李臻;朱忠祥;宋正河;毛恩荣;: "犁耕作业大马力拖拉机驱动轮滑转率控制方法", 农业工程学报, no. 15, pages 55 - 63 * |
| 黄小靖;张峰;张士文;: "嵌入式无线智能轮胎系统设计", 实验室研究与探索, no. 07, pages 89 - 92 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113515807A (en) * | 2021-04-21 | 2021-10-19 | 灵耘智能科技(上海)有限公司 | Wheel vertical force detection method and device, electronic equipment and storage medium |
| CN113515807B (en) * | 2021-04-21 | 2024-01-30 | 灵耘智能科技(上海)有限公司 | Wheel vertical force detection method and device, electronic equipment and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112622536B (en) | 2023-10-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN214138129U (en) | Vehicle tyre working state monitoring and sensing device | |
| CN101001763B (en) | Method and device for estimating dynamic state quantity of tire, and tire with sensor | |
| EP0887211A1 (en) | Tire monitoring system | |
| JP5250754B2 (en) | Sensor transponder, tire contact length and tire load measuring method | |
| US11945266B2 (en) | Tire load estimation | |
| CN102069686B (en) | Automobile tire monitoring device based on organic piezoelectric material | |
| CN1852814B (en) | Sensor-incorporated tire and tire condition estimating method | |
| CN104169706B (en) | System and method for determining tyre evenness parameter from the piezo-electric measurement in tire counter deflexion region | |
| CN86104399A (en) | The coding circuit of two variable measured values of tire and use the apparatus surveillance of pneumatic tyre of this circuit | |
| CN112622536B (en) | Vehicle tyre working state monitoring and sensing device and method | |
| WO2012091719A1 (en) | Piezoelectric based system and method for determining tire load | |
| US9815343B1 (en) | Tire sensing method for enhanced safety and controllability of vehicles | |
| CN101337491A (en) | Method to estimate the residual useful adhering potential of a rolling tyre | |
| CN204679190U (en) | A kind of mine hoist rotation shaft torquemeter | |
| CN1977156A (en) | System for estimating the maximum adherence coefficient by measuring stresses in a tyre tread | |
| Lee et al. | A self-powering system based on tire deformation during driving | |
| CN107957305A (en) | A kind of multidirectional wireless soil pressure sensor | |
| CN103223830A (en) | Automobile tire air pressure compound monitoring apparatus and monitoring method thereof | |
| Zhang et al. | Abrasion status prediction with BP neural network based on an intelligent tire system | |
| CN210954088U (en) | Detection device for detecting motion state of object | |
| CN108189627A (en) | A kind of self-powered, the tire transmission function method for sensing from perception | |
| CN106840706B (en) | Sideslip detection method and device based on strain gauge type | |
| CN112124013A (en) | Intelligent tire testing system and testing method based on piezoelectric power generation material | |
| BR112021009453A2 (en) | method for determining the firmness of a soil | |
| EP2736781B1 (en) | Method for optical measuring of tyre adhesion |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |