CN109532353B - Tire thickness detection method and monitoring system - Google Patents
Tire thickness detection method and monitoring system Download PDFInfo
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- CN109532353B CN109532353B CN201811536293.XA CN201811536293A CN109532353B CN 109532353 B CN109532353 B CN 109532353B CN 201811536293 A CN201811536293 A CN 201811536293A CN 109532353 B CN109532353 B CN 109532353B
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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
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0486—Signalling devices actuated by tyre pressure mounted on the wheel or tyre comprising additional sensors in the wheel or tyre mounted monitoring device, e.g. movement sensors, microphones or earth magnetic field sensors
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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
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0486—Signalling devices actuated by tyre pressure mounted on the wheel or tyre comprising additional sensors in the wheel or tyre mounted monitoring device, e.g. movement sensors, microphones or earth magnetic field sensors
- B60C23/0488—Movement sensor, e.g. for sensing angular speed, acceleration or centripetal force
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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
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
Abstract
The invention discloses a tire thickness detection method and a tire thickness monitoring system, and relates to the field of vehicles. The method comprises the following steps: analyzing to obtain the first time required by the ultrasonic waves to reach the tire from the ultrasonic sensor according to the monitored current tire pressure of the tire and the model of the tire; acquiring second time required by the ultrasonic wave to reciprocate between the ultrasonic sensor and the ground; calculating the tire propagation time according to the first time and the second time; and calculating to obtain the thickness of the tire according to the tire propagation time and a second preset propagation speed. The thickness calculation of tire is comparatively simple and convenient, and the user need not to observe the tire, can look over the thickness of tire in the control module, and control module's monitoring precision is higher.
Description
Technical Field
The invention relates to the field of vehicles, in particular to a tire thickness detection method and a tire thickness monitoring system.
Background
Along with the development of science and technology, people's daily trip is more and more convenient, and the appearance of car has greatly reduced the time that people went to two places, has made things convenient for people's trip. However, the tires of the vehicle are continuously worn by the vehicle for a long time, and when the tires are worn seriously, the ground is easy to have insufficient gripping force on the vehicle, and then traffic accidents are easy to happen.
At present, whether the user is close to the wear mark through naked eye direct observation tire usually, nevertheless because the precision when observing the wear mark through naked eye is lower, and needs the user often to carry out the observation of tire, and the operation is comparatively loaded down with trivial details, is unfavorable for user's operation.
Disclosure of Invention
The invention aims to provide a tire thickness detection method and a tire thickness monitoring system, which are simple and convenient in tire thickness calculation, a user can check the thickness of a tire in a control module without observing the tire, and the monitoring precision of the control module is high.
The technical scheme provided by the invention is as follows:
a tire thickness detection method, comprising: analyzing to obtain the first time required by the ultrasonic waves to reach the tire from the ultrasonic sensor according to the monitored current tire pressure of the tire and the model of the tire; acquiring second time required by the ultrasonic wave to reciprocate between the ultrasonic sensor and the ground; calculating the tire propagation time according to the first time and the second time; and calculating to obtain the thickness of the tire according to the tire propagation time and a second preset propagation speed.
Further, analyzing the first time required for the ultrasonic wave to reach the tire from the ultrasonic sensor according to the monitored current tire pressure of the tire and the model of the tire specifically comprises: acquiring the current monitored tire pressure of the tire; analyzing and obtaining the deformation quantity of the tire under the current tire pressure according to the stored tire model; analyzing to obtain the minimum distance between the ultrasonic sensor and the tire according to the deformation amount of the tire and the initial distance between the ultrasonic sensor and the tire; taking the minimum spacing as a first spacing between the ultrasonic sensor and the tire; calculating a first time required for the ultrasonic waves to reach the tire from the ultrasonic sensor according to a first preset propagation speed and the first distance.
Further, the step of obtaining a second time required for the ultrasonic wave to travel back and forth between the ultrasonic sensor and the ground specifically includes: the ultrasonic sensor transmits ultrasonic waves, and the time for transmitting the ultrasonic waves is used as starting time; when the ultrasonic sensor receives the reflected ultrasonic wave, taking the time of the received reflected ultrasonic wave as termination time; calculating the time difference between the starting time and the ending time according to the starting time and the ending time; the time difference is taken as a second time required to shuttle between the ultrasonic sensor and the ground.
Further, according to the starting time and the ending time, after the time difference between the starting time and the ending time is calculated, the method further comprises the following steps: analyzing whether a second time has existed; when there is no second time, performing the step of regarding the time difference as a second time required for a round trip between the ultrasonic sensor and the ground; when a second time already exists, analyzing whether the time difference is less than the second time; and replacing the second time with the time difference when the time difference is smaller than the second time.
Further, after analyzing and obtaining a first time required for the ultrasonic wave to reach the tire from the ultrasonic sensor according to the monitored current tire pressure of the tire and the model of the tire, the step of obtaining the ultrasonic wave before a second time required for the ultrasonic wave to go back and forth between the ultrasonic sensor and the ground further comprises the following steps: acquiring the running speed of a vehicle; calculating to obtain the rotation period of the tire according to the running speed of the vehicle and the model of the tire; calculating to obtain a monitoring frequency according to the rotation period and a preset monitoring frequency; and controlling the ultrasonic sensor to emit ultrasonic waves according to the monitoring frequency.
One of the objectives of the present invention is to provide a tire thickness detecting system, which includes a tire pressure monitor, an ultrasonic sensor and a control module; the tire pressure monitor can be used for monitoring the current tire pressure of the tire and sending the monitored current tire pressure of the tire to the control module; the control module is used for analyzing and obtaining first time required by the ultrasonic waves when the ultrasonic waves reach the tire from the ultrasonic sensor according to the current tire pressure of the tire and the model of the tire; and for controlling the ultrasonic sensor to emit ultrasonic waves; the ultrasonic sensor is used for acquiring second time required by the ultrasonic to and fro between the ultrasonic sensor and the ground, calculating to obtain the tire propagation time according to the first time and the second time, and sending the tire propagation time to the control module; the control module is further used for calculating the thickness of the tire according to the tire propagation time and a second preset propagation speed.
Further, the control module includes: the first receiving unit is used for receiving the current tire pressure of the tire sent by the tire pressure monitor; the deformation storage unit is used for storing the model of the tire and the deformation amount of the tire under various tire pressures; the deformation analysis unit is used for analyzing and obtaining the deformation quantity of the tire under the current tire pressure according to the stored tire model; the distance analysis unit analyzes and obtains the minimum distance between the ultrasonic sensor and the tire according to the deformation amount of the tire and the initial distance between the ultrasonic sensor and the tire; taking the minimum spacing as a first spacing between the ultrasonic sensor and the tire; and the time calculation unit is used for calculating first time required by the ultrasonic waves to reach the tire from the ultrasonic sensor according to a first preset propagation speed and the first distance.
Further, the control module includes: the ultrasonic control unit is used for controlling the ultrasonic sensor to emit ultrasonic waves and receiving a feedback signal sent by the ultrasonic sensor; a time unit which takes the time for controlling the ultrasonic sensor to emit the ultrasonic waves as starting time; and taking the time of receiving the feedback signal sent by the ultrasonic sensor as the termination time; calculating the time difference between the starting time and the ending time according to the starting time and the ending time; the time difference is taken as a second time required to shuttle between the ultrasonic sensor and the ground.
Further, the control module further comprises: a time analysis unit for analyzing whether the second time has existed; when the second time does not exist, the time unit takes the time difference as a second time required for the round trip between the ultrasonic sensor and the ground; when a second time already exists, the time unit analyzes whether the time difference is less than the second time; when the time difference is less than the second time, the time unit replaces the second time with the time difference.
Further, a speed monitor is included for monitoring the speed of the vehicle and sending the monitored speed of the vehicle to the control module; the control module includes: a second receiving unit that receives the speed of the vehicle transmitted by the speed monitor; the cycle analysis unit is used for calculating the rotation cycle of the tire according to the running speed of the vehicle and the model of the tire; the frequency analysis unit calculates to obtain monitoring frequency according to the rotation period and preset monitoring frequency; and the ultrasonic control unit is used for controlling the ultrasonic sensor to emit ultrasonic waves.
Compared with the prior art, the tire thickness detection method and the tire thickness monitoring system provided by the invention have the following beneficial effects:
1. the required first time when the ultrasonic wave arrives the tire from ultrasonic sensor can be obtained through the monitoring of tire pressure, namely the deformation volume of tire, and the required second time that comes and goes between ultrasonic sensor and ground according to the ultrasonic wave again, can obtain the thickness of tire, and the thickness calculation of tire is comparatively simple and convenient, and the user need not to observe the tire, can look over the thickness of tire in the control module, and control module's monitoring precision is higher.
2. When the signal and the current tire pressure of the tire are obtained, the control module can analyze the deformation quantity of the tire, and the minimum distance between the deformed tire and the ultrasonic sensor can be calculated according to the distance between the control module and the tire stored in the control module.
3. Through the setting of the starting time and the ending time, the control module can acquire the second time required by the ultrasonic wave to and fro between the ultrasonic sensor and the ground, the monitoring process is simple and convenient, and other control operations are not needed.
4. In the side-looking process, the control module cannot know whether the ultrasonic sensor moves to a position right below the ultrasonic sensor, namely whether the second time obtained by the previous test is the minimum time required for the round trip between the ultrasonic sensor and the ground, so that the control module can compare the second time with the time difference obtained by the current test.
5. Because when monitoring the time that the ultrasonic wave transmitted between ultrasonic sensor and ground, second time promptly, control module is difficult to guarantee that ultrasonic sensor just in time just begins to monitor when being located the lower extreme, consequently, control module can implement monitoring many times, comes the accuracy that further increases the second time that acquires.
Drawings
The above features, technical features, advantages and modes of realisation of a tire thickness monitoring method and system will be further described in the following, in a clearly understandable manner, with reference to the accompanying drawings, which illustrate preferred embodiments.
FIG. 1 is a schematic flow chart of a tire thickness detection method of the present invention;
FIG. 2 is a schematic flow chart of another tire thickness testing method of the present invention;
FIG. 3 is a schematic flow chart of step S3 in the tire thickness detecting method according to the present invention;
FIG. 4 is a schematic flow chart of yet another tire thickness detection method of the present invention;
FIG. 5 is a schematic structural view of a tire thickness detection system of the present invention;
FIG. 6 is a schematic diagram of a control module of a tire thickness detection system according to the present invention;
FIG. 7 is a schematic diagram of a control module in a tire thickness monitoring system according to yet another embodiment of the present invention;
fig. 8 is a schematic structural diagram of a control module in a tire thickness detecting system according to still another embodiment of the present invention.
The reference numbers illustrate: 10. the tire pressure monitoring system comprises a tire pressure monitor, 20 an ultrasonic sensor, 30 a control module, 301 a first receiving unit, 302 a deformation storage unit, 303 a deformation analysis unit, 304 a distance analysis unit, 305 a time calculation unit, 306 an ultrasonic control unit, 307 a time unit, 308 a time analysis unit, 309 a second receiving unit, 310 a period analysis unit, 311 a frequency analysis unit and 40 a speed monitor.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
For the sake of simplicity, only the parts relevant to the invention are schematically shown in the drawings, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
According to an embodiment provided by the present invention, as shown in fig. 1, a tire thickness detecting method includes:
and S1, analyzing to obtain the first time required by the ultrasonic wave to reach the tire from the ultrasonic sensor according to the monitored current tire pressure of the tire and the model of the tire.
When the control module acquires the tire pressure, the control module can calculate the deformation degree of the tire according to the stored tire signals, and the distance between the ultrasonic sensor and the tire is obtained because the ultrasonic sensor is pre-installed in the tire, so that the distance between the ultrasonic sensor and the tire can be obtained after the deformation of the tire is obtained through calculation.
Then, according to the speed of the ultrasonic wave, the transmission time of the ultrasonic wave in the tire can be analyzed, namely the first time t1 required by the ultrasonic wave when the ultrasonic wave reaches the tire from the ultrasonic sensor.
And S3, acquiring a second time required for the ultrasonic wave to reciprocate between the ultrasonic sensor and the ground.
When the user needs to monitor the thickness of the tyre, or under any condition, the ultrasonic sensor can send ultrasonic waves, and the ultrasonic sensor can control the received power of the ultrasonic sensor, so as to receive the ultrasonic waves reflected by the ground and obtain the second time t2 required by the ultrasonic waves to go and return between the ultrasonic sensor and the ground.
And S4, calculating the tire propagation time according to the first time and the second time.
The propagation time t3 is the propagation time of the ultrasonic wave in the tire, and the propagation time t3 is t2-2 t 1.
And S5, calculating the thickness of the tire according to the tire propagation time and a second preset propagation speed.
The second predetermined propagation speed is the propagation speed v3 of the ultrasonic wave in the tire, so the thickness s3 of the tire is t3 v 3.
In this embodiment, can obtain the ultrasonic wave through the monitoring of tire pressure and arrive required very first time when the tire from ultrasonic sensor, the deformation volume of tire promptly, according to the required second time of ultrasonic wave round trip between ultrasonic sensor and ground again, can obtain the thickness of tire, the user can learn the wearing and tearing condition of tire, the thickness calculation of tire is comparatively simple and convenient, and the user need not to observe the tire, can look over the thickness of tire in the control module, and control module's monitoring precision is higher.
According to another embodiment provided by the present invention, as shown in fig. 2, a tire thickness detecting method includes:
and S11, acquiring the current monitored tire pressure of the tire.
And S12, analyzing and obtaining the deformation quantity of the tire under the current tire pressure according to the stored tire model.
And S13, analyzing to obtain the minimum distance between the ultrasonic sensor and the tire according to the deformation amount of the tire and the initial distance between the ultrasonic sensor and the tire.
S14, taking the minimum distance as a first distance between the ultrasonic sensor and the tire.
And S15, calculating a first time required for the ultrasonic wave to reach the tire from the ultrasonic sensor according to a first preset propagation speed and the first distance.
And S3, acquiring a second time required for the ultrasonic wave to reciprocate between the ultrasonic sensor and the ground.
And S4, calculating the tire propagation time according to the first time and the second time.
And S5, calculating the thickness of the tire according to the tire propagation time and a second preset propagation speed.
Since the tire abuts on the ground and is then deformed, when the ultrasonic sensor is located at the lowermost side during rotation of the tire, the distance between the ultrasonic sensor and the tire is minimized. When the model and the current tire pressure of the tire are obtained, the control module can analyze the deformation quantity of the tire, and the minimum distance between the deformed tire and the ultrasonic sensor can be calculated according to the initial distance between the ultrasonic sensor and the tire stored in the control module.
The first preset propagation speed is the propagation speed of the ultrasonic wave in the air after the minimum distance is taken as the first distance, so that the control module can calculate the first time required for the ultrasonic wave to reach the tire from the ultrasonic sensor.
Preferably, a temperature sensor can be further arranged in the tire pressure monitoring system and used for monitoring the temperature of air in the tire, the monitored temperature is sent to the control module when the temperature is monitored, and the control module can correspondingly update the propagation speed of the ultrasonic waves in the air when the temperature is received, namely the first preset propagation speed, so that the accuracy of the obtained first distance is increased, and then the accuracy of the thickness of the obtained tire is increased.
According to still another embodiment provided by the present invention, as shown in fig. 1 and 3, a tire thickness detecting method includes:
and S1, analyzing to obtain the first time required by the ultrasonic wave to reach the tire from the ultrasonic sensor according to the monitored current tire pressure of the tire and the model of the tire.
And S31, the ultrasonic sensor emits ultrasonic waves, and the time of emitting the ultrasonic waves is used as the starting time.
And S32, when the ultrasonic sensor receives the reflected ultrasonic wave, taking the time of the received reflected ultrasonic wave as the termination time.
And S33, calculating the time difference between the starting time and the ending time according to the starting time and the ending time.
And S35, taking the time difference as a second time required by the round trip between the ultrasonic sensor and the ground.
And S4, calculating the tire propagation time according to the first time and the second time.
And S5, calculating the thickness of the tire according to the tire propagation time and a second preset propagation speed.
Preferably, step S33 is followed by:
and S34, analyzing whether the second time exists.
When there is no second time, step S35 is performed.
And S36, when the second time exists, analyzing whether the time difference is smaller than the second time.
And S37, replacing the second time with the time difference when the time difference is smaller than the second time.
When the control module needs to detect the distance between the ultrasonic sensor and the ground, the ultrasonic wave can start to send the ultrasonic wave to realize ranging, and the time difference between the moment of sending the ultrasonic wave and the moment of receiving the ultrasonic wave is used as the second time.
In this embodiment, through the setting of the start time and the end time, the control module can obtain the second time required for the ultrasonic wave to come and go between the ultrasonic sensor and the ground, and the monitoring process is simpler and more convenient without other control operations.
Preferably, when the control module obtains the time required by the ultrasonic wave to and fro between the ultrasonic sensor and the ground for multiple times in the monitoring process, the control module can firstly analyze whether the second time exists, when the second time does not exist, the test is shown as the first test, and the control module can directly take the obtained time difference as the second time.
And when the second time is monitored, the test is not the first side view. In the side-looking process, the control module cannot know whether the ultrasonic sensor moves to the position right below, namely whether the second time obtained by the previous test is the minimum time required by the round trip between the ultrasonic sensor and the ground, so that the control module can compare the second time with the time difference obtained by the current test, and when the time difference is smaller than the second time, the ultrasonic sensor moves to the position right below in the second time obtained before the surface, therefore, the distance between the ultrasonic sensor and the ground in the current test state is smaller, and the time difference obtained by the current test is used as the second time.
And when the time difference obtained by the test is greater than the second time, the distance between the ultrasonic sensor and the ground is greater than the distance between the ultrasonic sensor and the ground when the second time is obtained by the test, so that the second time does not need to be replaced.
According to still another embodiment provided by the present invention, as shown in fig. 4, a tire thickness detecting method includes:
and S1, analyzing to obtain the first time required by the ultrasonic wave to reach the tire from the ultrasonic sensor according to the monitored current tire pressure of the tire and the model of the tire.
And S21, acquiring the running speed of the vehicle.
And S22, calculating the rotation period of the tire according to the running speed of the vehicle and the model of the tire.
And S23, calculating to obtain the monitoring frequency according to the rotation period and the preset monitoring frequency.
And S24, controlling the ultrasonic sensor to emit ultrasonic waves according to the monitoring frequency.
And S3, acquiring a second time required for the ultrasonic wave to reciprocate between the ultrasonic sensor and the ground.
And S4, calculating the tire propagation time according to the first time and the second time.
And S5, calculating the thickness of the tire according to the tire propagation time and a second preset propagation speed.
The control module can be electrically connected to the speed sensor, so that the control module can acquire the running speed of the vehicle and then calculate the rotation period of the tire.
Because when monitoring the time that the ultrasonic wave transmitted between ultrasonic sensor and ground, second time promptly, control module is difficult to guarantee that ultrasonic sensor just in time just begins to monitor when being located the lower extreme, consequently, control module can implement monitoring many times, comes the accuracy that further increases the second time that acquires.
The control module can be internally provided with a preset monitoring frequency, and the preset monitoring frequency refers to the time monitoring frequency in one rotation period of the tire. The preset monitoring frequency can be 5 to 10 times and is changed according to the requirements of a user, so that the monitoring frequency can be obtained by combining the obtained rotation period and the preset monitoring frequency, and the higher the preset frequency is, the higher the precision of the second time of the measured tire is, and the higher the precision of the thickness of the measured tire is, but the greater the load on the control module is.
Preferably, the control module can also set the total monitoring time or the monitoring times or the monitoring period, the monitoring of the thickness of the tire can be completed within a certain time, unnecessary waste is reduced, and the monitored parameters can be changed according to the requirements of users.
According to an embodiment of the present invention, as shown in fig. 5, a tire thickness detecting system includes a tire pressure monitor 10, an ultrasonic sensor 20, and a control module 30.
The tire pressure monitor 10 can be used to monitor the current tire pressure of the tire and transmit the monitored current tire pressure of the tire to the control module 30.
The control module 30 is configured to analyze a first time required for the ultrasonic waves to reach the tire from the ultrasonic sensor 20 according to the current tire pressure of the tire and the model of the tire; and for controlling the ultrasonic sensor 20 to emit ultrasonic waves.
The ultrasonic sensor 20 is configured to obtain a second time required for the ultrasonic to go back and forth between the ultrasonic sensor 20 and the ground, calculate the tire propagation time according to the first time and the second time, and send the tire propagation time to the control module 30.
The control module 30 is further configured to calculate the thickness of the tire according to the tire propagation time and a second preset propagation speed.
When the control module 30 acquires the tire pressure, the control module 30 may calculate the deformation degree of the tire according to the stored tire signal, and since the ultrasonic sensor 20 is pre-installed in the tire to obtain the distance between the ultrasonic sensor and the tire, the distance between the ultrasonic sensor and the tire can be obtained after the deformation of the tire is calculated.
Then, according to the speed of the ultrasonic wave, the transmission time of the ultrasonic wave in the tire can be analyzed, that is, the first time t1 required by the ultrasonic wave to reach the tire from the ultrasonic sensor 20.
When the user needs to monitor the thickness of the tyre, or under any condition, the ultrasonic sensor 20 can send ultrasonic waves, the ultrasonic sensor 20 can control the power it receives for receiving the ultrasonic waves reflected by the ground, and the second time t2 required for the ultrasonic waves to travel back and forth between the ultrasonic sensor 20 and the ground is obtained.
The propagation time t3 is the propagation time of the ultrasonic wave in the tire, and the propagation time t3 is t2-2 t 1.
The second predetermined propagation speed is the propagation speed v3 of the ultrasonic wave in the tire, so the thickness s3 of the tire is t3 v 3.
In this embodiment, the first time required when the ultrasonic wave arrives at the tire from the ultrasonic sensor 20 can be obtained through monitoring of the tire pressure, that is, the deformation amount of the tire, and then the second time required for the ultrasonic wave to go back and forth between the ultrasonic sensor 20 and the ground can be obtained, the thickness of the tire can be obtained by a user, the wear condition of the tire can be known by the user, the thickness calculation of the tire is simple and convenient, the user does not need to observe the tire, the thickness of the tire can be checked in the control module 30, and the monitoring precision of the control module 30 is high.
Specifically, the tire pressure monitor 10 and the ultrasonic sensor 20 can be disposed at the same position of the wheel, or the ultrasonic transmitter can be directly built in the tire pressure monitor 10, facilitating the installation of the ultrasonic sensor 20.
According to another embodiment of the present invention, as shown in fig. 5 and 6, a tire thickness detecting system includes a tire pressure monitor 10, an ultrasonic sensor 20, and a control module 30.
The tire pressure monitor 10 can be used to monitor the current tire pressure of the tire and transmit the monitored current tire pressure of the tire to the control module 30.
The control module 30 is configured to analyze a first time required for the ultrasonic waves to reach the tire from the ultrasonic sensor 20 according to the current tire pressure of the tire and the model of the tire; and for controlling the ultrasonic sensor 20 to emit ultrasonic waves.
The ultrasonic sensor 20 is configured to obtain a second time required for the ultrasonic to go back and forth between the ultrasonic sensor 20 and the ground, calculate the tire propagation time according to the first time and the second time, and send the tire propagation time to the control module 30.
The control module 30 is further configured to calculate the thickness of the tire according to the tire propagation time and a second preset propagation speed.
The control module 30 includes:
a first receiving unit 301, configured to receive the current tire pressure of the tire sent by the tire pressure monitor 10.
And a deformation storage unit 302 for storing the model number of the tire and the deformation amount of the tire under various tire pressures.
And the deformation analysis unit 303 is used for analyzing and obtaining the deformation amount of the tire under the current tire pressure according to the stored tire model.
A distance analysis unit 304 for analyzing a minimum distance between the ultrasonic sensor 20 and the tire according to the deformation amount of the tire and the initial distance between the ultrasonic sensor 20 and the tire; the minimum spacing is taken as the first spacing between the ultrasonic sensor 20 and the tire.
The time calculation unit 305 calculates a first time required for the ultrasonic wave to reach the tire from the ultrasonic sensor 20, based on a first predetermined propagation speed and the first distance.
Since the tire abuts on the ground and is then deformed, when the ultrasonic sensor 20 is positioned at the lowermost side during rotation of the tire, the distance between the ultrasonic sensor 20 and the tire is minimized. When the model and the current tire pressure of the tire are obtained, the control module 30 may analyze the deformation amount of the tire, and may calculate the minimum distance between the deformed tire and the ultrasonic sensor 20 according to the initial distance between the ultrasonic sensor 20 and the tire stored in the control module 30.
When the minimum pitch is set as the first pitch, the first preset propagation speed refers to the propagation speed of the ultrasonic wave in the air, and therefore, the control module 30 can calculate the first time required for the ultrasonic wave to reach the tire from the ultrasonic sensor 20.
Preferably, a temperature sensor can be further arranged in the tire pressure monitoring system, and is used for monitoring the temperature of the air in the tire, and when the temperature is monitored, the monitored temperature is sent to the control module 30, and when the temperature is received by the control module 30, the propagation speed of the ultrasonic wave in the air is correspondingly updated, namely the first preset propagation speed, so that the accuracy of the obtained first distance is increased, and then the accuracy of the thickness of the obtained tire is increased.
According to still another embodiment of the present invention, as shown in fig. 5 and 7, a tire thickness detecting system includes a tire pressure monitor 10, an ultrasonic sensor 20, and a control module 30.
The tire pressure monitor 10 can be used to monitor the current tire pressure of the tire and transmit the monitored current tire pressure of the tire to the control module 30.
The control module 30 is configured to analyze a first time required for the ultrasonic waves to reach the tire from the ultrasonic sensor 20 according to the current tire pressure of the tire and the model of the tire; and for controlling the ultrasonic sensor 20 to emit ultrasonic waves.
The ultrasonic sensor 20 is configured to obtain a second time required for the ultrasonic to go back and forth between the ultrasonic sensor 20 and the ground, calculate the tire propagation time according to the first time and the second time, and send the tire propagation time to the control module 30.
The control module 30 is further configured to calculate the thickness of the tire according to the tire propagation time and a second preset propagation speed.
The control module 30 includes:
an ultrasonic control unit 306, configured to control the ultrasonic sensor 20 to emit an ultrasonic wave, and receive a feedback signal sent by the ultrasonic sensor 20.
A time unit 307 for setting a time for controlling the ultrasonic sensor 20 to emit the ultrasonic wave as a start time; and the time of receiving the feedback signal transmitted by the ultrasonic sensor 20 is taken as the termination time; calculating the time difference between the starting time and the ending time according to the starting time and the ending time; the time difference is taken as the second time required to shuttle between the ultrasonic sensor 20 and the ground.
Preferably, the control module 30 further comprises:
a time analyzing unit 308 for analyzing whether the second time already exists.
When there is no second time, the time unit 307 takes the time difference as a second time required for the round trip between the ultrasonic sensor 20 and the ground.
When the second time already exists, the time unit 307 analyzes whether the time difference is smaller than the second time.
When the time difference is smaller than the second time, the time unit 307 replaces the second time with the time difference.
When the control module 30 needs to detect the distance between the ultrasonic sensor 20 and the ground, the ultrasonic wave starts to emit the ultrasonic wave to realize ranging, and the time difference between the time of emitting the ultrasonic wave and the time of receiving the ultrasonic wave is used as the second time.
In this embodiment, the second time required for the ultrasonic wave to come and go between the ultrasonic sensor 20 and the ground can be obtained by the control module 30 through setting the start time and the end time, and the monitoring process is simple and convenient without other control operations.
Preferably, when the control module 30 acquires the time required for the ultrasonic wave to travel back and forth between the ultrasonic sensor 20 and the ground for a plurality of times during the monitoring process, the control module 30 can first analyze whether the second time exists, and when the second time does not exist, the test indicates that the test is the first test, and the control module 30 can directly use the acquired time difference as the second time.
And when the second time is monitored, the test is not the first side view. In the side view process, the control module 30 cannot know whether the ultrasonic sensor 20 moves to a position right below, that is, whether the second time obtained by the previous test is the minimum time required for the round trip between the ultrasonic sensor 20 and the ground, so that the control module 30 can compare the second time with the time difference obtained by the current test, and when the time difference is smaller than the second time, the ultrasonic sensor 20 moves to a position right below at the second time obtained before the surface, therefore, the distance between the ultrasonic sensor 20 and the ground in the current test state is smaller, and the time difference obtained by the current test is used as the second time.
When the time difference obtained by the test is greater than the second time, it indicates that the distance between the ultrasonic sensor 20 and the ground is greater than the distance between the ultrasonic sensor 20 and the ground when the test is performed for the second time in the test state, so that the second time does not need to be replaced.
The control module 30 can be electrically connected to the speed sensor, and therefore, the control module 30 can acquire the running speed of the vehicle and then calculate the rotation period of the tire.
Since the control module 30 cannot guarantee that the ultrasonic sensor 20 starts monitoring only when the time of transmission of the ultrasonic wave between the ultrasonic sensor 20 and the ground is monitored, that is, the second time, is the time when the ultrasonic wave is transmitted between the ultrasonic sensor 20 and the ground, the control module 30 can perform monitoring for many times to further increase the accuracy of the acquired second time.
The control module 30 can be built-in with a preset monitoring frequency, which refers to the number of times that time monitoring is performed within one rotation period of the tire. The preset monitoring frequency can be 5 to 10 times and is changed according to the user's requirement, so that the monitoring frequency can be obtained by combining the obtained rotation period and the preset monitoring frequency, and the higher the preset frequency is, the higher the accuracy of the second time of the measured tire is, and therefore, the higher the accuracy of the measured thickness of the tire is, but the greater the load on the control module 30 is.
Preferably, the control module 30 can also set the total monitoring time or the number of monitoring times or the monitoring period, so that the monitoring of the tire thickness can be completed within a certain time, unnecessary waste is reduced, and the monitored parameters can be changed according to the requirements of users.
According to still another embodiment of the present invention, as shown in fig. 5 and 8, a tire thickness detecting system includes a tire pressure monitor 10, an ultrasonic sensor 20, a control module 30, and a speed monitor 40.
The tire pressure monitor 10 can be used to monitor the current tire pressure of the tire and transmit the monitored current tire pressure of the tire to the control module 30.
The control module 30 is configured to analyze a first time required for the ultrasonic waves to reach the tire from the ultrasonic sensor 20 according to the current tire pressure of the tire and the model of the tire; and for controlling the ultrasonic sensor 20 to emit ultrasonic waves.
The ultrasonic sensor 20 is configured to obtain a second time required for the ultrasonic to go back and forth between the ultrasonic sensor 20 and the ground, calculate the tire propagation time according to the first time and the second time, and send the tire propagation time to the control module 30.
The control module 30 is also configured to determine the tire travel time and a second predetermined travel speed.
The speed monitor 40 is used to monitor the speed of the vehicle and send the monitored speed of the vehicle to the control module 30.
The control module 30 includes:
a second receiving unit 309 for receiving the speed of the vehicle transmitted by the speed monitor 40.
And a period analysis unit 310 for calculating a rotation period of the tire according to the running speed of the vehicle and the model of the tire.
And the frequency analysis unit 311 calculates the monitoring frequency according to the rotation period and a preset monitoring frequency.
An ultrasonic control unit 306 for controlling the ultrasonic sensor 20 to emit ultrasonic waves.
The control module 30 can be electrically connected to the speed sensor, and therefore, the control module 30 can acquire the running speed of the vehicle and then calculate the rotation period of the tire.
Since the control module 30 cannot guarantee that the ultrasonic sensor 20 starts monitoring only when the time of transmission of the ultrasonic wave between the ultrasonic sensor 20 and the ground is monitored, that is, the second time, is the time when the ultrasonic wave is transmitted between the ultrasonic sensor 20 and the ground, the control module 30 can perform monitoring for many times to further increase the accuracy of the acquired second time.
The control module 30 can be built-in with a preset monitoring frequency, which refers to the number of times that time monitoring is performed within one rotation period of the tire. The preset monitoring frequency can be 5 to 10 times and is changed according to the user's requirement, so that the monitoring frequency can be obtained by combining the obtained rotation period and the preset monitoring frequency, and the higher the preset frequency is, the higher the accuracy of the second time of the measured tire is, and therefore, the higher the accuracy of the measured thickness of the tire is, but the greater the load on the control module 30 is.
Preferably, the control module 30 can also set the total monitoring time or the number of monitoring times or the monitoring period, so that the monitoring of the tire thickness can be completed within a certain time, unnecessary waste is reduced, and the monitored parameters can be changed according to the requirements of users.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A tire thickness detection method, comprising:
analyzing to obtain the first time required by the ultrasonic waves to reach the tire from the ultrasonic sensor according to the monitored current tire pressure of the tire and the model of the tire; the method specifically comprises the following steps:
acquiring the current monitored tire pressure of the tire;
analyzing and obtaining the deformation quantity of the tire under the current tire pressure according to the stored tire model;
analyzing to obtain the minimum distance between the ultrasonic sensor and the tire according to the deformation amount of the tire and the initial distance between the ultrasonic sensor and the tire;
taking the minimum spacing as a first spacing between the ultrasonic sensor and the tire;
calculating a first time required for the ultrasonic waves to reach the tire from the ultrasonic sensor according to a first preset propagation speed and the first distance;
acquiring second time required by the ultrasonic wave to reciprocate between the ultrasonic sensor and the ground; the method specifically comprises the following steps:
the ultrasonic sensor transmits ultrasonic waves, and the time for transmitting the ultrasonic waves is used as starting time;
when the ultrasonic sensor receives the reflected ultrasonic wave, taking the time of the received reflected ultrasonic wave as termination time;
calculating the time difference between the starting time and the ending time according to the starting time and the ending time;
taking the time difference as a second time required for a round trip between the ultrasonic sensor and the ground;
calculating the propagation time of the tire according to the first time and the second time;
calculating to obtain the thickness of the tire according to the propagation time of the tire and a second preset propagation speed;
the first preset propagation speed is the propagation speed of ultrasonic waves in the air; the second preset propagation speed is the propagation speed of the ultrasonic wave in the tire.
2. The method for detecting the thickness of the tire as claimed in claim 1, wherein the step of calculating the time difference between the start time and the end time based on the start time and the end time further comprises:
analyzing whether a second time has existed;
when there is no second time, performing the step of regarding the time difference as a second time required for a round trip between the ultrasonic sensor and the ground;
when a second time already exists, analyzing whether the time difference is less than the second time;
and replacing the second time with the time difference when the time difference is smaller than the second time.
3. The method of claim 1, wherein the step of obtaining the ultrasonic wave before the second time required for the ultrasonic wave to travel back and forth between the ultrasonic sensor and the ground further comprises, after analyzing the first time required for the ultrasonic wave to reach the tire from the ultrasonic sensor according to the monitored current tire pressure of the tire and the model of the tire:
acquiring the running speed of a vehicle;
calculating to obtain the rotation period of the tire according to the running speed of the vehicle and the model of the tire;
calculating to obtain a monitoring frequency according to the rotation period and a preset monitoring frequency;
and controlling the ultrasonic sensor to emit ultrasonic waves according to the monitoring frequency.
4. A tire thickness detection system is characterized by comprising a tire pressure monitor, an ultrasonic sensor and a control module;
the tire pressure monitor can be used for monitoring the current tire pressure of the tire and sending the monitored current tire pressure of the tire to the control module;
the control module is used for analyzing and obtaining first time required by the ultrasonic waves when the ultrasonic waves reach the tire from the ultrasonic sensor according to the current tire pressure of the tire and the model of the tire; and for controlling the ultrasonic sensor to emit ultrasonic waves;
the ultrasonic sensor is used for acquiring second time required by the ultrasonic to and fro between the ultrasonic sensor and the ground, calculating the propagation time of the tire according to the first time and the second time, and sending the propagation time of the tire to the control module;
the control module is further used for calculating the thickness of the tire according to the propagation time of the tire and a second preset propagation speed;
the control module includes:
the first receiving unit is used for receiving the current tire pressure of the tire sent by the tire pressure monitor;
the deformation storage unit is used for storing the model of the tire and the deformation amount of the tire under various tire pressures;
the deformation analysis unit is used for analyzing and obtaining the deformation quantity of the tire under the current tire pressure according to the stored tire model;
the distance analysis unit analyzes and obtains the minimum distance between the ultrasonic sensor and the tire according to the deformation amount of the tire and the initial distance between the ultrasonic sensor and the tire; taking the minimum spacing as a first spacing between the ultrasonic sensor and the tire;
a time calculation unit that calculates a first time required for the ultrasonic wave to reach the tire from the ultrasonic sensor, based on a first preset propagation speed and the first distance;
the ultrasonic control unit is used for controlling the ultrasonic sensor to emit ultrasonic waves and receiving a feedback signal sent by the ultrasonic sensor;
a time unit which takes the time for controlling the ultrasonic sensor to emit the ultrasonic waves as starting time; and taking the time of receiving the feedback signal sent by the ultrasonic sensor as the termination time; calculating the time difference between the starting time and the ending time according to the starting time and the ending time; taking the time difference as a second time required for a round trip between the ultrasonic sensor and the ground;
the first preset propagation speed is the propagation speed of ultrasonic waves in the air; the second preset propagation speed is the propagation speed of the ultrasonic wave in the tire.
5. A tire thickness detection system as in claim 4, wherein said control module further comprises:
a time analysis unit for analyzing whether the second time has existed;
when the second time does not exist, the time unit takes the time difference as a second time required for the round trip between the ultrasonic sensor and the ground;
when a second time already exists, the time unit analyzes whether the time difference is less than the second time;
when the time difference is less than the second time, the time unit replaces the second time with the time difference.
6. A tire thickness detection system as in claim 4, wherein:
the speed monitoring device is used for monitoring the speed of the vehicle and sending the monitored speed of the vehicle to the control module;
the control module includes:
a second receiving unit that receives the speed of the vehicle transmitted by the speed monitor;
the cycle analysis unit is used for calculating the rotation cycle of the tire according to the running speed of the vehicle and the model of the tire;
the frequency analysis unit calculates to obtain monitoring frequency according to the rotation period and preset monitoring frequency;
and the ultrasonic control unit is used for controlling the ultrasonic sensor to emit ultrasonic waves.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811536293.XA CN109532353B (en) | 2018-12-14 | 2018-12-14 | Tire thickness detection method and monitoring system |
| PCT/CN2019/119804 WO2020119410A1 (en) | 2018-12-14 | 2019-11-20 | Tire thickness measuring method and monitoring system |
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| CN201811536293.XA CN109532353B (en) | 2018-12-14 | 2018-12-14 | Tire thickness detection method and monitoring system |
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| CN109532353B (en) * | 2018-12-14 | 2020-12-01 | 上海为彪汽配制造有限公司 | Tire thickness detection method and monitoring system |
| CN110962512A (en) * | 2019-12-24 | 2020-04-07 | 深圳供电局有限公司 | Intelligent monitoring system for automobile tire |
| CN112373247B (en) * | 2020-10-12 | 2022-10-14 | 东风汽车集团有限公司 | Tire state early warning method and device |
| CN114812376B (en) * | 2022-04-21 | 2024-03-22 | 山东软科智能科技发展有限公司 | System and method for detecting depth of tire pattern of vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4099505B2 (en) * | 2003-11-27 | 2008-06-11 | 京セラ株式会社 | Pressure sensor device |
| JP2008168826A (en) * | 2007-01-12 | 2008-07-24 | Honda Motor Co Ltd | Tire pneumatic pressure monitoring system |
| CN104015575B (en) * | 2014-06-26 | 2016-08-24 | 中山市澳多电子科技有限公司 | Automotive safety monitoring device |
| KR101592520B1 (en) * | 2014-08-25 | 2016-02-05 | 경북대학교 산학협력단 | Device for measuring tire pressure and method thereof, recording medium for performing the method |
| CN105459740B (en) * | 2015-12-31 | 2018-07-31 | 清华大学苏州汽车研究院（吴江） | A kind of tire intelligence assistant diagnosis system |
| CN107867129B (en) * | 2016-09-28 | 2019-10-18 | 珠海全志科技股份有限公司 | Tire pressure detection method and device |
| TW201825321A (en) * | 2017-01-06 | 2018-07-16 | 佳世達科技股份有限公司 | Tire Monitoring System and Tire Monitoring Method |
| CN106827974A (en) * | 2017-01-24 | 2017-06-13 | 苏州佳世达电通有限公司 | Tyre monitoring system and tire monitor method |
| DE202017102186U1 (en) * | 2017-04-11 | 2017-05-05 | 4Jet Technologies Gmbh | Pneumatic tire with radio chip |
| CN207156857U (en) * | 2017-07-28 | 2018-03-30 | 合肥富铭机电有限公司 | A kind of tire thickness detection means |
| CN108189628B (en) * | 2018-01-10 | 2020-07-07 | 南京晓庄学院 | Tire protection device based on intelligent prediction and control method thereof |
| CN108973537B (en) * | 2018-08-06 | 2020-12-01 | 上海为彪汽配制造有限公司 | Tire wear detection device and tire wear detection method |
| CN109532353B (en) * | 2018-12-14 | 2020-12-01 | 上海为彪汽配制造有限公司 | Tire thickness detection method and monitoring system |
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| CN109532353A (en) | 2019-03-29 |
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