CN206177317U - Measuring device and taxi pricing device of vehicle tyre revolution - Google Patents
Measuring device and taxi pricing device of vehicle tyre revolution Download PDFInfo
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- CN206177317U CN206177317U CN201621074817.4U CN201621074817U CN206177317U CN 206177317 U CN206177317 U CN 206177317U CN 201621074817 U CN201621074817 U CN 201621074817U CN 206177317 U CN206177317 U CN 206177317U
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Abstract
Measuring device and taxi pricing device of vehicle tyre revolution, the measuring device of vehicle tyre revolution includes: acceleration sensor, a wireless transmission module and a microprocessor, an acceleration sensor and a microprocessor communication are connected, and a wireless transmission module is connected with a microprocessor communication. The acceleration information of vehicle tyre is acquireed through acceleration sensor, the revolution of vehicle tyre is confirmed according to acceleration information by microprocessor, send away the revolution biography of vehicle tyre through a wireless transmission module, with the distance of traveling of confirming the vehicle according to this revolution, can avoid among the prior art not measuring the difficulty because the revolution that the mechanical interface of sensor caused is connected to vehicle itself, and mechanical connection sensor mode such as flexible axle causes the problem of installation and maintenance difficulty, thereby improve vehicle traveling distance measuring maneuverability and feasibility.
Description
Technical field
The utility model is related to measurement technology, more particularly to the measurement apparatus and taxi of a kind of vehicle tyre revolution to valuate
Device.
Background technology
In recent years, the traffic congestion in each city is increasingly serious, and the expansion of Car ownership is further exacerbated by urban congestion,
Public traffic in priority has turned into the development tactics in each city, is also benefited from it as the taxi of quasi- public transport, the growth of taxis quantity
Speed is significantly improved.Taxi, is a kind of vehicles of charge, and the operating range generally according to taxi determines that passenger need to pay
Expense.
In the prior art, flexible axle is typically installed on the output shaft of taxi gearbox, valuation is installed on flexible axle and is passed
Sensor, valuation sensor is connected by wire with fee register；In vehicle travel process, the output shaft of gearbox drives flexible axle to turn
It is dynamic, and flexible axle and output shaft synchronization, the mechanical signal of output shaft rotation is passed to by valuation sensor by flexible axle, and count
The mechanical signal of output shaft rotation is converted into corresponding electric signal by valency sensor, and the electric signal is passed into the valuation
Device, so that fee register determines the operating range of taxi according to the electric signal, and then determines that passenger need to pay use.
However, because the revolution speed measuring that the mechanical interface for not having to connect sensor on existing vehicle is caused is difficult and soft
Installation and problem difficult in maintenance that the mechanical linkage sensors mode such as axle is caused, cause the operable of vehicle operating range measurement
Property and feasibility have difficulties.
Utility model content
For drawbacks described above of the prior art, the utility model provides a kind of measurement apparatus of vehicle tyre revolution and goes out
Hire a car pricing device, be favorably improved the operability and feasibility of the measurement of vehicle operating range.
One side of the present utility model is to provide a kind of measurement apparatus of vehicle tyre revolution, including：
Acceleration transducer, the first wireless transport module and first microprocessor, the acceleration transducer and described
One microprocessor communications are connected, and first wireless transport module is connected with first microprocessor communication；
Wherein, the acceleration transducer is used to detect the acceleration information of vehicle tyre；The first microprocessor is used
In the revolution that the vehicle tyre is determined according to the acceleration information；First wireless transport module is used for described first
The revolution of the vehicle tyre that microprocessor determines is sent to corresponding receiving device by way of being wirelessly transferred.
Further, the first microprocessor includes：
Determining module, for the acceleration information according to the vehicle tyre, determines the acceleration sensing on vehicle tyre
The tangential acceleration of device；
And, processing module, for the tangential acceleration according to the acceleration transducer on the vehicle tyre and described
The acceleration of gravity of acceleration transducer, determines the wavy curve of the acceleration of the acceleration transducer, and according to the ripple
Shape curve determines the revolution of the vehicle tyre.
Further, the determining module according to following first formula specifically for determining cutting for the acceleration transducer
To acceleration：
Wherein, a21It is the tangential acceleration of acceleration transducer；a1It is vehicle tyre acceleration；R is acceleration transducer
The distance between with the center of circle of vehicle tyre；R is the radius of vehicle tyre；
The processing module is specifically for determining the ripple of the acceleration of the acceleration transducer according to following second formula
Shape curve：
a2=cos θ × G-a21；
Wherein, a2It is the acceleration of acceleration transducer；θ is the corresponding radius in acceleration transducer current location and starting
Angle between the corresponding radius in position；G is the acceleration of gravity of acceleration transducer；a21Tangential for acceleration transducer adds
Speed.
Further, the processing module is additionally operable to determine the number of the curved section on the wavy curve, the curve
The number of section is the revolution of the vehicle tyre；Wherein, the curved section be two adjacent minimum points of the wavy curve it
Between curved section.
Further, the measurement apparatus of the vehicle tyre revolution also include：Angular-rate sensor, with described first micro- place
Reason device communication link, the angular speed for detecting the vehicle tyre is believed with the acceleration detected to the acceleration transducer
Breath is calibrated.
Further, the measurement apparatus of the vehicle tyre revolution also include：Power module, with the first microprocessor
Electrical connection, electric energy is provided for the measurement apparatus to the vehicle tyre revolution.
Other side of the present utility model is to provide a kind of taxi pricing device, including：The survey of vehicle tyre revolution
Amount device and receiving device, the measurement apparatus of the vehicle tyre revolution are the survey of the vehicle tyre revolution described in foregoing any one
Amount device；Wherein, the measurement apparatus of the vehicle tyre revolution are used to for the revolution of the vehicle tyre of measurement to be sent to described connecing
Receiving unit, the receiving device is used to determine according to the revolution of the vehicle tyre for receiving the mileage of vehicle traveling.
The measurement apparatus and taxi pricing device of the vehicle tyre revolution that the utility model is provided, by acceleration sensing
Device obtains the acceleration information of vehicle tyre, and determines the revolution of vehicle tyre according to acceleration information by microprocessor, passes through
The revolution of vehicle tyre is passed and sent by the first wireless transport module, to determine the operating range of vehicle according to the revolution, is had
Help the operability and feasibility of the measurement of raising vehicle operating range.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of measurement apparatus one of the utility model vehicle tyre revolution；
Fig. 2 is the measuring principle schematic diagram of the measurement apparatus of the utility model vehicle tyre revolution；
Fig. 3 is the wavy curve of the acceleration of acceleration transducer in the measurement apparatus of the utility model vehicle tyre revolution
Figure.
Specific embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, is clearly and completely described, it is clear that retouched to the technical scheme in the utility model embodiment
The embodiment stated is a part of embodiment of the utility model, rather than whole embodiments.
Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment for being obtained, belongs to the scope of the utility model protection.In the case where not conflicting, following implementation
Feature in example and embodiment can be mutually combined.
It should be noted that in description of the present utility model, it is different that term " first ", " second " are only used for convenient description
Part, and it is not intended that indicating or implying ordinal relation, relative importance or implicit indicate indicated technical characteristic
Quantity.Thus, " first " is defined, at least one this feature can be expressed or be implicitly included to the feature of " second ".
Fig. 1 is the structural representation of the embodiment of measurement apparatus one of the utility model vehicle tyre revolution；Refer to Fig. 1,
The measurement apparatus of vehicle tyre revolution include：Acceleration transducer 10, the first wireless transport module 30 and first microprocessor 20,
Acceleration transducer 10 and the communication connection of first microprocessor 20, the first wireless transport module 30 are communicated with first microprocessor 20
Connection；
Wherein, acceleration transducer 10 is used to detect the acceleration information of vehicle tyre；First microprocessor 20 is used for root
The revolution of vehicle tyre is determined according to acceleration information；First wireless transport module 30 is used for the car for determining first microprocessor 20
The revolution of tire is sent to corresponding receiving device by way of being wirelessly transferred.
Specifically, acceleration transducer 10 may be mounted on the wheel hub of vehicle tyre, specific mounting means this implementation
Example is not specifically limited, and those skilled in the art can be configured according to actual needs；Acceleration transducer 10 can be six
Axle acceleration sensor or nine axle acceleration sensors.
First microprocessor 30 can be according to vehicle tyre when rotating a circle acceleration direction change, and according to
The differential responses in direction go out the revolution of vehicle tyre, in order to determine the operating range of vehicle according to the revolution.Due to vehicle wheel
The Zhou Changwei known quantities of tire, therefore, it can be represented by the revolution operating range of vehicle, or by the revolution and vehicle tyre
The operating range of the product representation vehicle of girth.
In the present embodiment, by way of being wirelessly transferred, can either accurately measure vehicle distance travelled, and nothing
The cable of device corresponding with the measuring method of vehicle tyre revolution and the receiving device corresponding with the device must be connected, is easy to
The installation of device corresponding with the measuring method of vehicle tyre revolution.
It is appreciated that：When microprocessor 20 determines a revolution, the first wireless transport module 30 can be to connecing
Receiving unit sends a signal, and the total revolution of vehicle tyre is determined by receiving device.Or, determine vehicle wheel in microprocessor 20
After the total revolution of tire, total revolution is sent to receiving device by the first wireless transport module 30, the present embodiment in like fashion as a example by.
The measurement apparatus of the vehicle tyre revolution that the present embodiment is provided, vehicle tyre is detected by acceleration transducer 10
Acceleration information, and the revolution of vehicle tyre is determined according to acceleration information by first microprocessor 20, it is wireless by first
The revolution of vehicle tyre is passed and sent by transport module 30, to determine the operating range of vehicle according to the revolution, helps to keep away
The operability and feasibility for exempting from the measurement of vehicle operating range in the prior art have difficulties problem.
Further, first microprocessor 20 includes：Determining module, for the acceleration information according to vehicle tyre, really
Determine the tangential acceleration of the acceleration transducer 10 on vehicle tyre；
Specifically, further, it is determined that module according to following first formula specifically for determining acceleration transducer 10
Tangential acceleration：
Wherein, a21It is the tangential acceleration of acceleration transducer 10；a1For vehicle tyre acceleration (namely vehicle accelerate
Degree)；R is the distance between center of circle of acceleration transducer 10 and vehicle tyre；R is the radius of vehicle tyre.
First microprocessor 20 also includes：Processing module, for cutting according to the acceleration transducer 10 on vehicle tyre
To acceleration and the acceleration of gravity of acceleration transducer 10, the wavy curve of the acceleration of acceleration transducer 10 is determined, and
The revolution of vehicle tyre is determined according to wavy curve.
Specifically, processing module is used to determine that the waveform of the acceleration of acceleration transducer is bent according to following second formula
Line：
a2=cos θ × G-a21；
Wherein, a2It is the acceleration of acceleration transducer；θ is the corresponding radius in acceleration transducer current location and starting
Angle between the corresponding radius in position；G is the acceleration of gravity of acceleration transducer；a21Tangential for acceleration transducer adds
Speed.
Wherein, due to changing with time, θ can also change, therefore, the waveform of the acceleration of acceleration transducer is bent
Line is the cosine wave for changing over time.Due to the tangential acceleration a of acceleration transducer21Interference to the amplitude of cosine wave, it is remaining
String ripple is not very standard, however, this can't influence the cycle of cosine wave；Wherein, the cycle is adjacent two on wavy curve
The time corresponding to curved section between individual minimum point.The cycle of cosine wave changes with changes in vehicle speed：Car speed is got over
Hurry up, the cycle is shorter, ripple is more intensive；Car speed is slower, and the cycle is more long, and ripple gets over evacuation.
Processing module is additionally operable to determine the number of the curved section on wavy curve, number the turning for vehicle tyre of curved section
Number；Wherein, curved section is the curved section between two adjacent minimum points of wavy curve.
It is appreciated that：Curved section between two adjacent minimum points equivalent to the cosine wave in a cycle, often
Determine that a cosine wave then represents that vehicle tyre makes a circle.In the number namely wavy curve of the curved section on wavy curve
The number of cycles of cosine wave.
During due to vehicle ground zero, the acceleration change of vehicle tyre is very fast, it is not easy to differentiate, is further to improve vehicle
Operating range measurement accuracy, the measurement apparatus of vehicle tyre revolution also include：Angular-rate sensor, it is micro- with first
The communication link of processor 20, the angular speed for detecting vehicle tyre, with the acceleration information detected to acceleration transducer 10
Calibrated.
It is the connection of the further measurement apparatus for simplifying vehicle tyre revolution, the measurement apparatus of vehicle tyre revolution are also
Including：Power module, is electrically connected with first microprocessor, and electric energy is provided for the measurement apparatus to vehicle tyre revolution.Power supply
Module can be button cell or battery etc..The diameter of the measurement apparatus of the vehicle tyre revolution of the present embodiment can be 27
Millimeter, can be highly 18 millimeters, and simple structure, size is smaller, is easy to carry and installs.
The measurement apparatus of the vehicle tyre revolution in the various embodiments described above are applicable not only to taxi etc. to be needed to count distance
Automobile, is also applicable to count the rail vehicle of distance；When the measurement apparatus of the vehicle tyre revolution in the various embodiments described above are fitted
During for rail vehicle, vehicle tyre is the wheel track of rail vehicle.
Fig. 2 is the measuring principle schematic diagram of the measurement apparatus of the utility model vehicle tyre revolution；Fig. 3 is the utility model
The wavy curve figure of the acceleration of acceleration transducer in the measurement apparatus of vehicle tyre revolution；Fig. 2-3 are refer to, is illustrated below
Illustrate the principle of the measurement apparatus measuring vehicle number of tire revolutions of vehicle tyre revolution：
As shown in Fig. 2 small square represents acceleration transducer 10, acceleration transducer 10 to vehicle tyre center away from
From being r, vehicle tyre radius is R.Radius represents the movement locus of sensor for the circle of r, and radius represents vehicle tyre for the circle of R
Edge.A, b, c, d are respectively the plane four direction of acceleration transducer 10, and A, B, C, D are respectively acceleration transducer 10 4
Individual main positions：Just go up, just under, the just left and positive right side.Assuming that being the initial position of sensor at A, then wheel takes a round, sensing
The change in location of device is A → B → C → D → A.
After vehicle is started running, acceleration transducer 10 is rotated with vehicle tyre, and acceleration transducer 10 can be received
To three power in direction：The power of gravity, centripetal force and tangential direction.
By taking two acceleration in face of c and d as an example, the acceleration change situation to acceleration transducer 10 is analyzed.It is false
If with front-right to being starting, the moving radius of acceleration transducer 10 are θ with the angle of base level line.D stress is for just, c is received
Power is negative.
The acceleration in acceleration transducer 10c and d faces is influenceed by the acceleration on acceleration of gravity and wheel tangential direction；
Acceleration in tangential direction is directly proportional to the acceleration that vehicle moves forward and backward；Vehicle acceleration is a1, then acceleration sensing
Acceleration in the tangential direction of device 10 is just a21=a1*r/R.The acceleration of acceleration transducer 10 is just a2=cos θ * G-
a21.Learnt by formula, if a21 values are constant, then acceleration a2 of the acceleration transducer 10 at B is positive maximum,
Acceleration a2 at D is negative maximum.
Then the size of a21 in actual conditions is analyzed again.General car can accelerate to 100km/h in 10 seconds from zero, close
27.78m/s, average acceleration is 2.778m/s2, i.e. about 0.28G, peak acceleration can reach 0.6G or so.If super
Run, acceleration can exceed 1G.
In Fig. 3, transversal line represents the time；The longitudinal axis for keeping left represents the acceleration of acceleration transducer 10；That keeps right is vertical
Axis represents the speed of vehicle；The corresponding curves of V are the rate curve of vehicle；The corresponding curves of a2 are acceleration transducer 10
Accelerating curve, also known as G value curves.
From the figure 3, it may be seen that vehicle acceleration can quickly reach a peak value when starting, when the speed V of vehicle gets up
Afterwards, vehicle acceleration can be stablized between 0.2G-0.3G, and vehicle acceleration can fall down when gearshift.And vehicle adds
The value of speed is even variation in whole accelerator, or not there is the bounce of about 0.15G or so.
When vehicle ground zero, acceleration change is very fast, it is not easy to differentiate, it is necessary to add angular-rate sensor data
Calibration.According to formula a2=cos θ * G-a21, acceleration is exactly a cosine wave for changing over time.The cycle of this waveform,
Change with changes in vehicle speed.Car speed is faster, and the cycle is shorter, and ripple is more intensive；Car speed is slower, and the cycle is more long, ripple
More evacuate.Certain this cosine wave is not very standard, and it have received the interference of tangential direction acceleration a21.But, in waveform point
In analysis.Its influence can be ignored.
A cosine wave is often calculated, represents that vehicle tyre makes a circle, around this principle, can just show that passenger takes
The revolution of period vehicle tyre.Additionally, according to cosine wave interlude, the rotating speed of tire can be calculated.
The course of work of measurement apparatus of the vehicle tyre revolution that the present embodiment is provided can be：
The acceleration information of vehicle tyre is detected by acceleration transducer 10；
First microprocessor 20 determines acceleration transducer on vehicle tyre according to the acceleration information of vehicle tyre
Tangential acceleration, specifically, the tangential acceleration of acceleration transducer is determined according to following first formula：
Wherein, a21It is the tangential acceleration of acceleration transducer；a1It is vehicle tyre acceleration；R is acceleration transducer
The distance between with the center of circle of vehicle tyre, namely r is the radius of the circle of the movement locus of acceleration transducer；R is vehicle wheel
The radius of tire.
Tangential acceleration and acceleration transducer of the first microprocessor 20 according to the acceleration transducer on vehicle tyre
Acceleration of gravity, determine the wavy curve of the acceleration of acceleration transducer, specifically, according to following second formula determine plus
The wavy curve of the acceleration of velocity sensor：
a2=cos θ × G-a21；
Wherein, a2It is the acceleration of acceleration transducer；θ is the corresponding radius in acceleration transducer current location and starting
Angle between the corresponding radius in position；G is the acceleration of gravity of acceleration transducer；a21Tangential for acceleration transducer adds
Speed；
First microprocessor 20 determines the revolution of vehicle tyre according to wavy curve, specifically, it is determined that on wavy curve
The number of curved section, the number of curved section is the revolution of vehicle tyre；Wherein, curved section is that adjacent two of wavy curve are minimum
Curved section between point.
First wireless transport module 30 is used for it is determined that after the revolution of vehicle tyre, by the by way of being wirelessly transferred
The revolution of the vehicle tyre that one microprocessor 20 determines is sent to corresponding receiving device.
The present embodiment also provides a kind of taxi pricing device, including：The measuring system of vehicle tyre revolution and reception set
Standby, the measuring system of vehicle tyre revolution is the measuring system of the vehicle tyre revolution in any of the above-described embodiment；Wherein, vehicle
The measuring system of number of tire revolutions is used to for the revolution of the vehicle tyre of measurement to be sent to receiving device, and receiving device is used for basis and connects
The revolution of the vehicle tyre for receiving determines the mileage of vehicle traveling.
In the present embodiment, receiving device, receiving device are also equipped with taxi on the instrument board of such as taxi
The second wireless transport module, the second microprocessor, display and serial ports can be included；Second wireless transport module, display and
Serial ports can be connected with the second microprocessor communications；Second microprocessor can also be electrically connected with supply unit, power supply dress
It can be independent supply unit to put, or taxi power supply in itself.
Wherein, what the second wireless transport module can be used in the measuring system with vehicle tyre revolution first is wirelessly transferred
Module communicates；The revolution that second microprocessor can be used for the vehicle tyre to measuring is processed and is determined that passenger needs to pay
With；Display can be used for the information such as the distance travelled to passenger display vehicle；Serial ports can be used for connecting with miscellaneous equipment
Connect.
Finally it should be noted that：Various embodiments above is only used to illustrate the technical solution of the utility model, rather than it is limited
System；Although being described in detail to the utility model with reference to foregoing embodiments, one of ordinary skill in the art should
Understand：It can still modify to the technical scheme described in foregoing embodiments, or to which part or whole
Technical characteristic carries out equivalent；And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality newly
The scope of each embodiment technical scheme of type.
Claims (7)
1. a kind of measurement apparatus of vehicle tyre revolution, it is characterised in that including：Acceleration transducer, first are wirelessly transferred mould
Block and first microprocessor, the acceleration transducer and first microprocessor communication connection, described first is wirelessly transferred
Module is connected with first microprocessor communication；
Wherein, the acceleration transducer is used to detect the acceleration information of vehicle tyre；The first microprocessor is used for root
The revolution of the vehicle tyre is determined according to the acceleration information；First wireless transport module is used for described first micro- place
The revolution of the vehicle tyre that reason device determines is sent to corresponding receiving device by way of being wirelessly transferred.
2. measurement apparatus of vehicle tyre revolution according to claim 1, it is characterised in that the first microprocessor bag
Include：
Determining module, for the acceleration information according to the vehicle tyre, determines acceleration transducer on vehicle tyre
Tangential acceleration；
And, processing module, for the tangential acceleration according to the acceleration transducer on the vehicle tyre and the acceleration
The acceleration of gravity of sensor is spent, the wavy curve of the acceleration of the acceleration transducer is determined, and it is bent according to the waveform
Line determines the revolution of the vehicle tyre.
3. measurement apparatus of vehicle tyre revolution according to claim 2, it is characterised in that the determining module is specifically used
In the tangential acceleration that the acceleration transducer is determined according to following first formula：
Wherein, a21It is the tangential acceleration of acceleration transducer；a1It is vehicle tyre acceleration；R is acceleration transducer and car
The distance between center of circle of tire；R is the radius of vehicle tyre；
The processing module is bent specifically for determining the waveform of the acceleration of the acceleration transducer according to following second formula
Line：
a2=cos θ × G-a21；
Wherein, a2It is the acceleration of acceleration transducer；θ is the corresponding radius in acceleration transducer current location and original position
Angle between corresponding radius；G is the acceleration of gravity of acceleration transducer；a21It is the tangential acceleration of acceleration transducer
Degree.
4. measurement apparatus of vehicle tyre revolution according to claim 3, it is characterised in that the processing module is additionally operable to
Determine the number of the curved section on the wavy curve, the number of the curved section is the revolution of the vehicle tyre；Wherein, institute
It is the curved section between two adjacent minimum points of the wavy curve to state curved section.
5. measurement apparatus of the vehicle tyre revolution according to claim any one of 1-4, it is characterised in that also include：Angle
Velocity sensor, is connected, the angular speed for detecting the vehicle tyre with first microprocessor communication, adds with to described
The acceleration information of velocity sensor detection is calibrated.
6. measurement apparatus of the vehicle tyre revolution according to claim any one of 1-4, it is characterised in that also include：Electricity
Source module, is electrically connected with the first microprocessor, and electric energy is provided for the measurement apparatus to the vehicle tyre revolution.
7. a kind of taxi pricing device, it is characterised in that including：The measurement apparatus and receiving device of vehicle tyre revolution, institute
It is the measurement apparatus of the vehicle tyre revolution described in claim any one of 1-6 to state the measurement apparatus of vehicle tyre revolution；Wherein,
The measurement apparatus of the vehicle tyre revolution are used to for the revolution of the vehicle tyre of measurement to be sent to the receiving device, described to connect
Receiving unit is used to determine according to the revolution of the vehicle tyre for receiving the mileage of vehicle traveling.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621074817.4U CN206177317U (en) | 2016-09-22 | 2016-09-22 | Measuring device and taxi pricing device of vehicle tyre revolution |
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| CN201621074817.4U CN206177317U (en) | 2016-09-22 | 2016-09-22 | Measuring device and taxi pricing device of vehicle tyre revolution |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114353822A (en) * | 2022-01-11 | 2022-04-15 | 深圳市几米物联有限公司 | Trailer mileage recording method, trailer and recording system |
| CN114786967A (en) * | 2019-12-12 | 2022-07-22 | 米其林集团总公司 | Method for obtaining the distance travelled by a rolling tire |
-
2016
- 2016-09-22 CN CN201621074817.4U patent/CN206177317U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114786967A (en) * | 2019-12-12 | 2022-07-22 | 米其林集团总公司 | Method for obtaining the distance travelled by a rolling tire |
| CN114786967B (en) * | 2019-12-12 | 2023-11-10 | 米其林集团总公司 | Method for obtaining the distance travelled by a rolling tyre |
| CN114353822A (en) * | 2022-01-11 | 2022-04-15 | 深圳市几米物联有限公司 | Trailer mileage recording method, trailer and recording system |
| CN114353822B (en) * | 2022-01-11 | 2024-05-24 | 深圳市几米物联有限公司 | Trailer mileage recording method, trailer and recording system |
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Address after: 101300 room 015, building 8, No. 1, Linkong Second Road, Shunyi Park, Zhongguancun Science and Technology Park, Shunyi District, Beijing Patentee after: BEIJING JULI TECHNOLOGY Co.,Ltd. Address before: 102206, B, 504, Xinyuan Science Park, 97 Changping Road, Beijing, Changping District Patentee before: BEIJING JULI SCIENCE & TECHNOLOGY Co.,Ltd. |