CN108638762B - Intelligent tire pressure monitoring system and method - Google Patents
Intelligent tire pressure monitoring system and method Download PDFInfo
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- CN108638762B CN108638762B CN201810660138.2A CN201810660138A CN108638762B CN 108638762 B CN108638762 B CN 108638762B CN 201810660138 A CN201810660138 A CN 201810660138A CN 108638762 B CN108638762 B CN 108638762B
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- 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
Abstract
The invention provides an intelligent tire pressure monitoring system, comprising: the data acquisition unit is used for acquiring the weight of each wheel and the time for each wheel to travel through the weighing device; and the comparison and judgment unit is used for firstly comparing the weights of two tires on the vehicle head or two tires on the vehicle body, preliminarily judging the tire underpressure corresponding to the tire with the smaller weight, secondly comparing the time of the two tires running through the weighing device, and determining the tire underpressure. The invention also provides an intelligent tire pressure monitoring method which comprises a data acquisition step and a comparison and judgment step. The invention solves the problems that the prior indirect tire pressure monitoring needs additional monitoring equipment and can not accurately determine the fault tire by utilizing the prior equipment based on the weight of the wheel and the passing time of the wheel, which are acquired by the data acquisition unit when the vehicle passes through the weighing device.
Description
Technical Field
The invention relates to the technical field of automobile tire pressure monitoring, in particular to an intelligent tire pressure monitoring system and method.
Background
The tire is used as the only part of the automobile which is directly contacted with the ground, and the tire pressure is one of important factors influencing the performance of the tire. On roads, particularly on expressways, the tire pressure of automobiles is very important to the safety of vehicle driving, and the over-high or over-low tire pressure can influence the safety driving of the vehicles and even cause traffic accidents.
Currently, a common tire pressure measurement includes maintaining and monitoring a tire or adding a tire pressure monitoring device before departure. The tire pressure monitoring devices are many and can be divided into the following measurement modes: direct-Pressure-Based TPMS (PSB for short) and indirect-Pressure-Based TPMS (WSB for short). The working principle of the direct tire pressure monitoring is as follows: the pressure of the tires is measured directly using pressure sensors mounted in each tire, the pressure information is transmitted from the inside of the tire to a central receiver module using a wireless transmitter, and the tire pressure data is displayed. The indirect tyre pressure monitoring has the working principle that when the air pressure of a certain tyre is reduced, the rolling radius of the tyre is reduced by the weight of a vehicle, so that the rotating speed of the tyre is faster than that of other wheels, and the aim of monitoring the tyre pressure is fulfilled by comparing the rotating speed difference between the tyres. However, the existing indirect tire pressure monitoring system requires an additional configuration of monitoring equipment, and cannot accurately determine a faulty tire when an abnormality is detected, for example, when 2 tires of the same axle are all abnormal in air pressure.
Chinese patent application No. 201610294000.6 discloses an indirect tire pressure monitoring method and apparatus, in which the wheel with the maximum rotation speed calculated by obtaining the rotation speeds of four wheels is the wheel with low tire pressure, but the method still needs to be additionally provided with a monitoring device to monitor the rotation speed of the wheel.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides an intelligent tire pressure monitoring system and method, which utilize the existing equipment based on the weight of the wheel and the passing time of the wheel, which are acquired by a data acquisition unit when a vehicle runs through a weighing device, and solve the problems that the current indirect tire pressure monitoring needs additional monitoring equipment and a fault tire cannot be accurately determined.
The invention is realized by the following technical scheme:
an intelligent tire pressure monitoring system comprising: the data acquisition unit is used for acquiring the weight of each wheel and the time for each wheel to travel through the weighing device; and the comparison and judgment unit is used for firstly comparing the weights of two tires on the vehicle head or two tires on the vehicle body, preliminarily judging the tire underpressure corresponding to the tire with the smaller weight, secondly comparing the time of the two tires running through the weighing device, and determining the tire underpressure.
Preferably, the system further comprises a tire pressure calculation unit for calculating the tire pressure of the target tire.
Further, the tire pressure calculating unit sets the moment when the vehicle passes through the weighing device to be in constant-speed running.
Further, the system further comprises a wheel base calculating unit for calculating the wheel base of the current running vehicle.
Preferably, the weighing device is a weighing sensor laid under the road surface.
Further, the load cells are laid in pairs under the road surface.
Preferably, the system further comprises an alarm unit, a vehicle type recognition unit and a communication unit.
Specifically, the communication unit is used for sending the tire pressure monitoring information to the vehicle-mounted controller and uploading the tire pressure monitoring information to the background server.
The invention also provides an intelligent tire pressure monitoring method, which comprises the following steps:
a data acquisition step: acquiring the weight W1, W2, W3 and W4 of each wheel and the time T1, T2, T3 and T4 of each wheel after the wheels pass through the weighing device by using the weighing device, wherein 1-4 correspond to the left front wheel, the right front wheel, the left rear wheel and the right rear wheel of the vehicle respectively;
a comparison and judgment step: comparing the left front wheel with the right front wheel, firstly comparing the weights of the left front wheel and the right front wheel, preliminarily judging the tire underpressure corresponding to the lower weight, secondly comparing the running time of the left front wheel and the right front wheel passing through the weighing device, and determining the tire underpressure; and comparing the left rear wheel with the right rear wheel, firstly comparing the weights of the left rear wheel and the right rear wheel, preliminarily judging the tire underpressure corresponding to the smaller weight, and secondly comparing the running time of the left rear wheel and the right rear wheel passing through the weighing device to determine the tire underpressure.
Preferably, the comparing and judging step further includes: for the left front wheel and the right front wheel, if the weights of the two tires are inconsistent, one of the two tires is under-pressure or the weight distribution of the vehicle head is not uniform; for the left rear wheel and the right rear wheel, if the weights of the two tires are inconsistent, one of the two tires is under-pressurized or the goods loading distribution of the vehicle body is not uniform.
Preferably, the comparing and judging step further includes: in the event that the wheel weights of the left and right front wheels are inconsistent, determining that the right front wheel is under-pressure if W1> W2 and T1< T2; if W1> W2 and T1 is T2, the weight distribution of the locomotive is not uniform; if W1> W2 and T1> T2, the left front wheel is under-pressurized and the weight of the vehicle head is concentrated on the left front wheel side.
Preferably, the comparing and judging step further includes: in the case where the wheel weights of the left and right rear wheels are inconsistent, if W3> W4 and T3< T4, determining that the right rear wheel is under-pressure; if W3> W4 and T3 is T4, the cargo loading distribution of the vehicle body is not uniform; if W3> W4 and T3> T4, the left rear wheel is under-pressurized and the cargo loading of the vehicle body is concentrated on the left rear wheel side.
Preferably, the comparing and judging step further includes: under the condition that the weights of the left rear wheel and the right rear wheel are not consistent, if the same side ends of the left front wheel and the left rear wheel are under-pressure or the same side ends of the right front wheel and the right rear wheel are under-pressure, the weight distribution of the vehicle body is not uniform; if the same side end is under-voltage or the tire pressures of the left front wheel and the right front wheel are not different, one tire in the left rear wheel and the right rear wheel is under-voltage, and then the time when the left rear wheel and the right rear wheel pass through the weighing sensor is compared to determine the under-voltage tire.
Preferably, the method further comprises a tire pressure calculating step of: and calculating the tire pressure of the target wheel according to the weight of the wheel obtained in the data acquisition step, the time for the wheel to pass through the weighing device and the known size of the weighing device.
Compared with the prior art, the invention has the beneficial effects that 1) the existing road weighing device is utilized to monitor the tire pressure, when the tire pressure is abnormal, the fault tire can be accurately positioned, so that a driver can find and process the abnormal condition in time, and the driving safety of the vehicle is improved; 2) the invention can be suitable for monitoring the tire pressure of various vehicle types, does not need to add additional monitoring equipment, does not need to improve the existing running vehicle, and has the advantages of lower cost investment, simple method and easy realization.
Drawings
Fig. 1 is a schematic structural diagram of an intelligent tire pressure monitoring system according to an embodiment;
fig. 2 is a schematic flow diagram of an intelligent tire pressure monitoring method according to an embodiment;
fig. 3 is a flowchart illustrating an intelligent tire pressure monitoring method according to an embodiment.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
As shown in fig. 1, there is provided an intelligent tire pressure monitoring system, including: the data acquisition unit is used for acquiring the weight of each wheel and the time for each wheel to travel through the weighing device; the comparison and judgment unit is used for firstly comparing the weights of two tires on the head of the vehicle or two tires on the body of the vehicle, preliminarily judging the tire underpressure corresponding to the tire with the smaller weight, secondly comparing the time of the two tires running through the weighing device, and determining the tire under underpressure; and the tire pressure calculating unit is used for calculating the tire pressure of the target tire. For ease of illustration, only those portions relevant to the present system are shown in FIG. 1.
Specifically, the system further comprises a wheel base calculation unit for calculating the wheel base of the currently running vehicle.
In particular, the system further comprises an alarm unit. When the system monitors that the tire pressure is abnormal, the alarm unit sends alarm information to the vehicle-mounted controller to prompt a driver, and the vehicle-mounted controller displays the alarm information sent by the alarm unit through a vehicle-mounted display or carries out voice prompt through a vehicle-mounted voice system. The vehicle-mounted controller also displays and reminds the monitored tire pressure information through the vehicle-mounted display.
Specifically, the system further comprises a vehicle type identification unit. The system is connected with a background server, and tire pressure relation tables of vehicles of different models under different weights are stored in the background server. After the system obtains the weight of the vehicle and calculates the width of the contact area between the wheels and the ground, the wheel base calculation unit can calculate the wheel base of the current running vehicle according to the time difference of the front wheels and the rear wheels passing through the weighing device, obtain the vehicle type of the current running vehicle according to the wheel base, and then obtain the accurate tire pressure of the current vehicle type under the current real-time weight by comparing the tire pressure relation tables of the vehicles of different vehicle types under different weights.
Specifically, the system further comprises a communication unit, wherein the communication unit is used for sending the tire pressure monitoring information to the vehicle-mounted controller and uploading the tire pressure monitoring information to the background server for storage, so that future query and big data analysis are facilitated.
Specifically, the communication unit sends the wheel base of the current vehicle calculated by the wheel base calculation unit to a background server, the background server prestores massive associated information of vehicle types and wheel bases, and the prestored associated information is called to compare big data of the wheel base of the current vehicle, so that the accurate vehicle type of the current vehicle can be determined.
Specifically, the weighing device is a weighing sensor laid under the road surface. The weighing sensors are laid under the road surface in pairs, and the weighing sensors are laid in parallel.
The invention provides an intelligent tire pressure monitoring method which can be suitable for all vehicles running on a road surface paved with a weighing sensor, is simple, can accurately position a fault tire, does not need to change the conventional vehicle or install any monitoring equipment on the conventional vehicle, is low in cost and has a popularization application prospect.
The invention provides an intelligent tire pressure monitoring method, which comprises the following steps:
a data acquisition step: acquiring the weight W1, W2, W3 and W4 of each wheel and the time T1, T2, T3 and T4 of each wheel after the wheels pass through the weighing device by using the weighing device, wherein 1-4 correspond to the left front wheel, the right front wheel, the left rear wheel and the right rear wheel of the vehicle respectively;
a comparison and judgment step: comparing the left front wheel with the right front wheel, firstly comparing the weights of the left front wheel and the right front wheel, preliminarily judging the tire underpressure corresponding to the lower weight, secondly comparing the running time of the left front wheel and the right front wheel passing through the weighing device, and determining the tire underpressure; and comparing the left rear wheel with the right rear wheel, firstly comparing the weights of the left rear wheel and the right rear wheel, preliminarily judging the tire underpressure corresponding to the smaller weight, and secondly comparing the running time of the left rear wheel and the right rear wheel passing through the weighing device to determine the tire underpressure.
Specifically, the weighing devices are weighing sensors and are laid under the road surface in parallel in pairs.
In a specific implementation, as shown in fig. 2, for the left front wheel and the right front wheel, the weights W1, W2 of the two tires are firstly compared, and if the weights are consistent, the data acquisition step is returned; if the weights of the two tires are not consistent, one of the two tires is under-pressure or the weight distribution of the vehicle head is not uniform; in the event of a disagreement in the wheel weights of the left and right front wheels, comparing the times T1, T2 at which said two wheels pass through the weighing device, determining that the right front wheel is under-pressure if W1> W2 and T1< T2; if W1> W2 and T1 is T2, the weight distribution of the locomotive is not uniform; if W1> W2 and T1> T2, the left front wheel is under-pressurized and the weight of the vehicle head is concentrated on the left front wheel side.
In a specific implementation, as shown in fig. 3, for the left rear wheel and the right rear wheel, the weights W3, W4 of the two tires are firstly compared, and if the weights are consistent, the data acquisition step is returned; if the weights of the two tires are not consistent, one of the two tires is under-pressurized or the goods loading distribution of the vehicle body is not uniform; in the case of a non-uniform wheel weight of the left and right rear wheels, comparing the times T3, T4 at which the two wheels pass through the weighing device, determining that the right rear wheel is under-pressurized if W3> W4 and T3< T4; if W3> W4 and T3 is T4, the cargo loading distribution of the vehicle body is not uniform; if W3> W4 and T3> T4, the left rear wheel is under-pressurized and the cargo loading of the vehicle body is concentrated on the left rear wheel side.
Specifically, under the condition that the weights of the left rear wheel and the right rear wheel are not consistent, if the same side ends of the left front wheel and the left rear wheel are under-pressure or the same side ends of the right front wheel and the right rear wheel are under-pressure, the weight distribution of the vehicle body is not uniform; if the same side end is under-voltage or the tire pressures of the left front wheel and the right front wheel are not different, one tire in the left rear wheel and the right rear wheel is under-voltage, and then the time when the left rear wheel and the right rear wheel pass through the weighing sensor is compared to determine the under-voltage tire.
Specifically, the method further comprises an alarming step, wherein when the abnormal tire pressure of a certain tire is monitored, alarming prompt is carried out to remind a driver that the certain tire is a tire with low tire pressure.
In the above embodiment, the tires of the front and the body are sequentially determined, and the order is to determine the two tires of the front (i.e., the front left wheel and the front right wheel) and then determine the two tires of the body (i.e., the rear left wheel and the rear right wheel).
In other embodiments, the order may be different, and two tires on the same side may be compared.
Specifically, the method further comprises a tire pressure calculation step of: and calculating the width of the contact area between the wheel and the ground according to the weight of the wheel, the time of the wheel passing through the weighing device and the known size of the weighing device, which are obtained in the data acquisition step, so as to calculate the tire pressure of the wheel.
In one embodiment, the load cell has a width d, the data acquisition unit acquires that the time when the wheel passes through the load cell is T, the weight of the wheel acquired by the load cell within the time T is W, the width of the area of the wheel in contact with the ground is S, the time T is divided into T1, T2, T3, T1 and T3 respectively indicate the time when the current wheel enters and leaves the load cell, T2 indicates the time when the wheel runs through the width S, and the tire pressure calculation unit calculates the running speed v-d/T1 or v-d/T3 of the current vehicle according to the data, then obtains S-v-T2, and obtains the tire pressure of the current wheel through W and S.
Specifically, the principle of the load cell obtaining the current wheel weight is as follows: the time when the current wheel runs through the weighing sensor is T, and the weighing sensor integrates the weight data of the current wheel collected in the time T to obtain the weight of the current wheel.
As another embodiment, the system further comprises a vehicle type recognition unit. The system is connected with a background server, and tire pressure relation tables of vehicles of different models under different weights are stored in the background server. Specifically, the width of the load cell is d, the time when the data acquisition unit acquires that a wheel passes through the load cell is T, the weight of the wheel acquired by the load cell within the time T is W, the width of the area of the wheel in contact with the ground is S, the time T is divided into T1, T2 and T3, T1 and T3 respectively indicate the time when the current wheel enters and leaves the load cell, T2 indicates the time when the wheel runs across the width S, the tire pressure calculation unit calculates the running speed v-d/T1 or v-d/T3 of the current vehicle according to the data, and then S-v-T2 is obtained; the data acquisition unit acquires that the time difference of front and rear wheels passing through the weighing sensor is Ts, and the wheelbase calculation unit can calculate the wheelbase Ss (distance Ss v) of the current vehicle according to the data; the vehicle type identification unit obtains the vehicle type of the current running vehicle through the wheel base, and the tire pressure calculation unit inquires the tire pressure relation table according to the vehicle type of the current running vehicle, compares the current weight of the target wheel with the width contacting the ground and obtains the current tire pressure of the target wheel.
Specifically, a large amount of associated data of vehicle types and wheel bases are stored in the background server, and the vehicle type identification unit can call the associated data of the vehicle types and the wheel bases in the background server to perform big data comparison, so as to determine the vehicle type corresponding to the current wheel base.
Specifically, the tire pressure relationship table of vehicles of different vehicle types under different weights stored in the background server may be obtained by a person skilled in the art through multiple test statistics, and details are not described herein.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention.
Claims (5)
1. An intelligent tire pressure monitoring system, comprising: the data acquisition unit is used for acquiring the weight of each wheel and the time for each wheel to travel through the weighing device; the comparison and judgment unit is used for firstly comparing the weights of two tires on the head of the vehicle or two tires on the body of the vehicle, preliminarily judging the tire underpressure corresponding to the tire with the smaller weight, secondly comparing the time of the two tires running through the weighing device, and determining the tire under underpressure;
the monitoring method of the intelligent tire pressure monitoring system comprises the following steps:
a data acquisition step: acquiring the weight W1, W2, W3 and W4 of each wheel and the time T1, T2, T3 and T4 of each wheel after the wheels pass through the weighing device by using the weighing device, wherein 1-4 correspond to the left front wheel, the right front wheel, the left rear wheel and the right rear wheel of the vehicle respectively;
a comparison and judgment step: comparing the left front wheel with the right front wheel, firstly comparing the weights of the left front wheel and the right front wheel, preliminarily judging the tire underpressure corresponding to the lower weight, secondly comparing the running time of the left front wheel and the right front wheel passing through the weighing device, and determining the tire underpressure; comparing the left rear wheel with the right rear wheel, firstly comparing the weights of the left rear wheel and the right rear wheel, preliminarily judging the tire underpressure corresponding to the lower weight, secondly comparing the running time of the left rear wheel and the right rear wheel passing through the weighing device, and determining the tire underpressure;
the comparing and judging step further comprises: for the left front wheel and the right front wheel, if the weights of the two tires are inconsistent, one of the two tires is under-pressure or the weight distribution of the vehicle head is not uniform; for the left rear wheel and the right rear wheel, if the weights of the two tires are inconsistent, one of the two tires is under-pressurized or the goods loading distribution of the vehicle body is not uniform;
in the event that the wheel weights of the left and right front wheels are inconsistent, determining that the right front wheel is under-pressure if W1> W2 and T1< T2; if W1> W2 and T1 is T2, the weight distribution of the locomotive is not uniform; if W1> W2 and T1> T2, the left front wheel is under-pressurized and the weight of the vehicle head is concentrated on the left front wheel side;
in the case where the wheel weights of the left and right rear wheels are inconsistent, if W3> W4 and T3< T4, determining that the right rear wheel is under-pressure; if W3> W4 and T3 is T4, the cargo loading distribution of the vehicle body is not uniform; if W3> W4 and T3> T4, the left rear wheel is under-pressurized and the cargo loading of the vehicle body is concentrated on the left rear wheel side.
2. The intelligent tire pressure monitoring system according to claim 1, further comprising a tire pressure calculation unit for calculating the tire pressure of the target tire;
the monitoring method of the intelligent tire pressure monitoring system further comprises the tire pressure calculation step: and calculating the tire pressure of the target wheel according to the weight of the wheel obtained in the data acquisition step, the time for the wheel to pass through the weighing device and the known size of the weighing device.
3. The intelligent tire pressure monitoring system of claim 1 wherein said weighing device is a load cell laid underneath a roadway.
4. The intelligent tire pressure monitoring system of claim 1, further comprising an alarm unit, a vehicle type identification unit, and a communication unit.
5. The intelligent tire pressure monitoring system of claim 1, wherein said comparing and determining step further comprises: under the condition that the weights of the left rear wheel and the right rear wheel are not consistent, if the same side ends of the left front wheel and the left rear wheel are under-pressure or the same side ends of the right front wheel and the right rear wheel are under-pressure, the weight distribution of the vehicle body is not uniform; if the same side end is under-voltage or the tire pressures of the left front wheel and the right front wheel are not different, one tire in the left rear wheel and the right rear wheel is under-voltage, and then the time when the left rear wheel and the right rear wheel pass through the weighing sensor is compared to determine the under-voltage tire.
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|---|---|---|---|---|
| US6301544B1 (en) * | 1998-10-29 | 2001-10-09 | K.K. Holding Ag | Traffic monitoring system |
| CN1749728A (en) * | 2004-09-17 | 2006-03-22 | 住友橡胶工业株式会社 | Judging method of load distribution |
| CN104185781A (en) * | 2012-04-04 | 2014-12-03 | 罗伯特·博世有限公司 | Method and device for tyre pressure testing |
| CN105235451A (en) * | 2015-10-22 | 2016-01-13 | 四川膨旭科技有限公司 | Driver's visual identification system with tire pressure monitoring function |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2470903B (en) * | 2009-06-08 | 2013-01-02 | Wheelright Ltd | Vehicle tyre inflation checking system |
| GB2494618B (en) * | 2011-08-22 | 2018-03-21 | Wheelright Ltd | Vehicle tyre pressure measurement |
| US9278587B2 (en) * | 2014-01-21 | 2016-03-08 | Arvinmeritor Technology, Llc | Tire inflation system and method of control |
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2018
- 2018-06-25 CN CN201810660138.2A patent/CN108638762B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6301544B1 (en) * | 1998-10-29 | 2001-10-09 | K.K. Holding Ag | Traffic monitoring system |
| CN1749728A (en) * | 2004-09-17 | 2006-03-22 | 住友橡胶工业株式会社 | Judging method of load distribution |
| CN104185781A (en) * | 2012-04-04 | 2014-12-03 | 罗伯特·博世有限公司 | Method and device for tyre pressure testing |
| CN105235451A (en) * | 2015-10-22 | 2016-01-13 | 四川膨旭科技有限公司 | Driver's visual identification system with tire pressure monitoring function |
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