CN114323031A - Wheel position positioning device and positioning method of automobile tire sensor - Google Patents
Wheel position positioning device and positioning method of automobile tire sensor Download PDFInfo
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Abstract
The invention relates to a wheel position positioning device and a positioning method of an automobile tire sensor, wherein a terminal processing module of the positioning device is respectively in communication connection with a ground excitation module, a cloud end and an induction module; the ground excitation module is buried in the ground, and is used for exciting the sensor in the tire, receiving the excitation feedback of the sensor and transmitting the excitation feedback to the terminal processing module; the cloud is used for storing and processing data uploaded by the terminal processing module; the sensing module is used for sensing the approach of a vehicle; the wheel position of a sensor sending out excitation feedback signals is judged by enhancing the excitation signals sent out by the excitation coils until the excitation feedback signals are received and combining the position of the ground excitation module and the position of the excitation coils sending out the excitation signals; the positioning device only needs to be installed at the vehicle entrance and exit, so that the positioning equipment is not needed to be installed on each vehicle, the equipment cost is greatly reduced, the installation method is simplified, and the popularization and the maintenance of products are facilitated.
Description
Technical Field
The invention relates to the field of automobile sensor positioning, in particular to a wheel position positioning device and a positioning method of an automobile tire sensor.
Background
In the current vehicle, often can be in the inside installation sensor of tire to realize the real-time status monitoring to the vehicle tire, ensure the safety of going of vehicle. Wherein, because the sensors and the tires are in one-to-one correspondence, the matching of the sensors and the tires needs to be completed; otherwise, even if the information of the sensor is received, it cannot be determined which tire is the information.
The current matching of the sensor and the tire comprises code scanning matching, acceleration detection automatic matching, one-to-one matching of an antenna and the tire, tire pressure detection matching and the like. The mode of sweeping code matching is tedious, and the effect of matching again can be influenced after the two-dimensional code on the surface of the tire is worn. Particularly for vehicles, the length of the vehicle is long, the number of tires of the vehicle is large, the difficulty of tire positioning and matching is increased, and the requirement for tire matching is further increased due to the fact that the replacement period of the tires is short. On the other hand, if the automatic positioning device is installed on each trolley, the equipment cost is high, and the maintenance is troublesome in the future. There is therefore a need for a wheel sensor alignment apparatus and method that is simple to install and easy to maintain. The positioning device only needs to be installed at the vehicle entrance and exit, so that the positioning equipment is not needed to be installed on each vehicle, the equipment cost is greatly reduced, the installation method is simplified, and the popularization and the maintenance of products are facilitated.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a wheel position positioning device and a positioning method of an automobile tire sensor.
In order to solve the problems, the invention adopts the following technical scheme:
a wheel position positioning device of an automobile tire sensor comprises a ground excitation module, a sensing module, a terminal processing module and a cloud end; the terminal processing module is in communication connection with the ground excitation module, the cloud end and the induction module respectively; the ground excitation module is buried in the ground, and is used for exciting the sensor in the tire, receiving the excitation feedback of the sensor and transmitting the excitation feedback to the terminal processing module; the cloud is used for storing and processing data uploaded by the terminal processing module; the sensing module is used for sensing the approach of a vehicle; the ground excitation module comprises a micro control unit, a drive circuit, an excitation coil, a wireless radio frequency circuit and a communication circuit; the micro control unit is respectively connected with the drive circuit, the communication circuit and the wireless radio frequency circuit; the drive circuit is also connected with a plurality of excitation coils; the communication circuit is used for realizing communication with the terminal processing module.
Further, the ground excitation module comprises six excitation coils, and the six excitation coils are arranged on the same straight line L; the left three continuous exciting coils form one group, the right three continuous exciting coils form one group, the six exciting coils are divided into two groups, and the directions of the exciting coils in the same group are the same; the distance between the magnet exciting coils in the same group is a set value, and the distance between the magnet exciting coils in the two groups is also a set value.
A wheel position positioning method of an automobile tire sensor comprises the following steps:
step 1: the terminal processing module finishes the starting initialization process;
step 2: sensing module acquiring image
And step 3: the sensing module judges whether a license plate exists in the acquired image; if the license plate exists, reading license plate information, transmitting the read license plate information to the terminal processing module, and entering the next step; otherwise, returning to the step 2;
and 4, step 4: the terminal processing module judges whether the vehicle enters a set position or not; starting an automatic positioning mode after the vehicle enters a set position; in the automatic positioning mode, acquiring information of a tire sensor through a ground excitation module;
and 5: uploading the tire sensor data to a cloud, and rewriting terminal wheel position configuration information on the vehicle after the cloud acquires the wheel position data;
step 6: the cloud end can track the brake and tire temperature conditions of the vehicle during operation for a long time, accurately correct the positions of the inner tire and the outer tire of the same re-wheel position, and re-write the wheel position configuration information of the vehicle-mounted terminal.
Further, the terminal processing module in step 4 judges whether the vehicle enters a set position, including judging through an external infrared sensor and a pressure sensor, or judging through manual signal input, or judging at a set time interval after acquiring the license plate image through the sensing module.
Further, the automatic positioning mode in step 4 includes the following steps:
step 41: the terminal processing module sets the ground excitation module as an excitation mode and sends an excitation command to the corresponding ground excitation module;
step 42: the ground excitation module judges whether an excitation command of the terminal processing module is received or not; if the excitation command is received, go to step 43; if the excitation command is not received, returning to step 41;
step 43: the control driving circuit drives the excitation coil to send out an excitation signal and receives excitation feedback of the sensor through the wireless radio frequency circuit;
step 44: the terminal processing module sets the ground excitation module as a reading mode, closes the excitation of the excitation module and sends a query command to the corresponding ground excitation module;
step 45: the ground excitation module judges whether an inquiry command is received or not; if the query command is received, transmitting the excitation feedback data to the terminal processing module, completing the processing and storage of the excitation feedback data in the terminal processing module, and entering step 46; otherwise, returning to the step 44;
step 46: the terminal processing module judges whether the query time reaches a set value; if the set value is reached, go to step 47; otherwise, returning to the step 44;
step 47: the terminal processing module judges whether the excitation times are greater than a set time n; if the number of times is more than the set number of times n, uploading the stored excitation feedback data to the cloud end, and ending the step; if the number of times is less than or equal to the set number of times n, the process returns to step 41.
Further, in the step 43, the excitation signal emitted by the excitation coil is gradually increased from 0 until the excitation feedback signal is received, and the excitation signal is stopped from being increased.
Further, in step 45, the processing of the excitation feedback data includes the following steps:
step 451: the terminal processing module enters a data processing flow;
step 452: deleting invalid data in the received excitation feedback data;
step 453: comparing the data, and storing the excitation feedback data into the corresponding wheel positions;
step 454: and finishing the processing of all the excitation feedback data and finishing the step.
Further, the excitation feedback signal in step 452 includes sensor information and tire information collected by the sensor, where the tire information includes tire temperature and tire pressure; the invalid data comprises data with the tire temperature and the tire pressure of 0 and repeated data.
Further, the data comparison process comprises the step of completing matching of sensor information and wheel positions in the excitation feedback data, wherein the wheel positions of the sensors are judged according to the position of the ground excitation module and the position of the excitation coil sending out the excitation signal.
Further, in the step 6, in the running process of the vehicle, the vehicle-mounted terminal and the cloud server can acquire the brake duration of the vehicle, and after the set accumulated brake duration is reached, the temperature of the inner tire and the outer tire of the set of wheel positions is compared, and the system with the continuously higher temperature is adjusted to the position of the inner tire again to finish the fine correction of the inner tire and the outer tire of the wheel resetting position.
The invention has the beneficial effects that:
through the arrangement of the ground excitation module, the sensor at the corresponding position is excited, the excitation feedback of the sensor is obtained, the information interaction with the sensor is completed, and the wheel position of the sensor is judged according to the excitation feedback information;
the induction module is arranged and comprises a license plate recognition camera, so that the approaching of the induction vehicle is realized, the license plate information of the approaching vehicle is acquired, and the vehicle matching is completed;
two groups of excitation coils forming an included angle are arranged, and each group of excitation coils comprises a plurality of excitation coils arranged in parallel, so that a sensor in a tire can receive an excitation signal with enough excitation strength, and the sensor can be excited conveniently;
the fixed sensor wheel position positioning device is arranged, so that the vehicle is parked at a set position to complete sensor positioning, positioning equipment is prevented from being installed on each vehicle, equipment cost is reduced, an installation method is simplified, and popularization and maintenance of products are facilitated;
the wheel position of a sensor sending the excitation feedback signal is judged by gradually enhancing the excitation signal sent by the excitation coil until the excitation feedback signal is received by combining the position of the ground excitation module and the position of the excitation coil sending the excitation signal;
the precise calibration of the inner tire and the outer tire is completed at the cloud end according to the braking duration and the braking temperature of the inner tire and the outer tire at the wheel resetting position.
Drawings
Fig. 1 is a block diagram of a structure (not including a cloud) according to a first embodiment of the present invention;
fig. 2 is a block diagram of a ground excitation module according to a first embodiment of the present invention;
FIG. 3 is a schematic diagram of the location of the exciting coil and the tire according to the first embodiment of the present invention;
FIG. 4 is a flowchart illustrating an overall positioning method according to a first embodiment of the present invention;
FIG. 5 is a flowchart illustrating an automatic positioning mode according to a first embodiment of the present invention;
fig. 6 is a data processing flow chart according to a first embodiment of the invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
The first embodiment is as follows:
as shown in fig. 1, a wheel position positioning device of an automobile tire sensor comprises a ground excitation module, a sensing module, a terminal processing module and a cloud end; the terminal processing module is in communication connection with the ground excitation module, the cloud end and the induction module respectively; the ground excitation module is buried in the ground, and is used for exciting the sensor in the tire, receiving the excitation feedback of the sensor and transmitting the excitation feedback to the terminal processing module; the cloud is used for storing and processing data uploaded by the terminal processing module; the sensing module is used to sense the approach of a vehicle, in this case.
As shown in fig. 2, since the universal vehicle type includes two axles, wherein the front row of axles is a single wheel and the rear row of axles is a multiple wheel, the ground excitation modules in this example have four sets, and the four sets of ground excitation modules are arranged in two rows in front and rear, and each row includes two. The ground excitation module comprises a Micro Control Unit (MCU), a drive circuit, an excitation coil, a wireless radio frequency circuit and a communication circuit; the micro control unit is respectively connected with the drive circuit, the communication circuit and the wireless radio frequency circuit; the drive circuit is also connected with a plurality of excitation coils; the communication circuit is used for realizing communication with the terminal processing module, and in the embodiment, the communication circuit is connected with the terminal processing module through a 485 bus. In this example, the micro control unit is connected to the driving circuit through the IO port, wherein the micro control unit transmits a PWM wave signal to the driving circuit to excite a low frequency induction signal. The micro control unit is also connected with the communication circuit through a USART interface; the micro control unit is also connected with a wireless radio frequency circuit through an SPI interface, the wireless radio frequency circuit is used for receiving excitation feedback of a sensor in the tire, each ground excitation module comprises two wireless radio frequency circuits in the example, and the excitation feedback received by the wireless radio frequency electric furnace is 433MHZ radio frequency excitation feedback.
As shown in fig. 3, in this example, one ground excitation module includes six excitation coils, which are arranged on the same straight line L; the three continuous exciting coils on the left side are in one group, the three continuous exciting coils on the right side are in one group, the six exciting coils are in two groups, the directions of the exciting coils in the same group are the same, the distance between the exciting coils in the same group is a set value, and the distance between the two groups of exciting coils is also a set value. The three left field coils are arranged at a set angle X with the straight line L, in this example the set angle is 45 degrees; the three field coils on the right side are arranged at a set angle Y, in this example-45 °, to the straight line L. In the implementation process, two groups of excitation coils forming an included angle are arranged, and each group of excitation coils comprises a plurality of excitation coils arranged in parallel, so that a sensor in a tire can receive excitation signals with enough excitation intensity. In this example, the excitation coil is excited at a low frequency of 125 KHZ.
The induction module comprises a license plate recognition camera, the induction module is used for inducing approaching of a vehicle, recognizing and acquiring license plate information, transmitting the license plate information to the terminal processing module, and the terminal processing module controls the ground excitation module to start.
As shown in fig. 4, a wheel position positioning method of a vehicle tire sensor includes the following steps:
step 1: the terminal processing module finishes the starting initialization process;
step 2: sensing module acquiring image
And step 3: the sensing module judges whether a license plate exists in the acquired image; if the license plate exists, reading license plate information, transmitting the read license plate information to the terminal processing module, and entering the next step; otherwise, returning to the step 2;
and 4, step 4: the terminal processing module judges whether the vehicle enters a set position or not; starting an automatic positioning mode after the vehicle enters a set position; in the automatic positioning mode, acquiring information of a tire sensor through a ground excitation module;
and 5: uploading the tire sensor data to a cloud, and rewriting terminal wheel position configuration information on the vehicle after the cloud acquires the wheel position data;
step 6: the cloud end tracks the brake and tire temperature conditions of the vehicle in operation for a long time, and further accurately confirms the positions of the inner tire and the outer tire of the set of wheel positions according to the tire temperature for the same re-wheel position, and rewrites the wheel position configuration information of the vehicle-mounted terminal.
The starting initialization process in the step 1 comprises a 485 bus initialization process and a 485 communication self-checking process.
As shown in fig. 5, the terminal processing module in step 4 determines whether the vehicle enters a set position, including determining through an external infrared sensor and a pressure sensor, or determining through manual signal input, or determining through an interval set time after the sensing module collects the license plate image. The automatic positioning mode comprises the following steps:
step 41: the terminal processing module sets the ground excitation module as an excitation mode and sends an excitation command to the corresponding ground excitation module;
step 42: the ground excitation module judges whether an excitation command of the terminal processing module is received or not; if the excitation command is received, go to step 43; if the excitation command is not received, returning to step 41;
step 43: the control driving circuit drives the excitation coil to send out an excitation signal and receives excitation feedback of the sensor through the wireless radio frequency circuit;
step 44: the terminal processing module sets the ground excitation module as a reading mode, closes the excitation of the excitation module and sends a query command to the corresponding ground excitation module;
step 45: the ground excitation module judges whether an inquiry command is received or not; if the query command is received, transmitting the excitation feedback data to the terminal processing module, completing the processing and storage of the excitation feedback data in the terminal processing module, and entering step 46; otherwise, returning to the step 44;
step 46: the terminal processing module judges whether the query time reaches a set value; if the set value is reached, go to step 47; otherwise, returning to the step 44;
step 47: the terminal processing module judges whether the excitation times are greater than a set time n; if the number of times is more than the set number of times n, uploading the stored excitation feedback data to the cloud end, and ending the step; if the number of times is less than or equal to the set number of times n, the process returns to step 41.
In step 41, the ground excitation module controls the excitation coil to emit the excitation signal only in the excitation mode.
In step 43, the excitation signal sent by the excitation coil is gradually enhanced from 0 until the excitation feedback signal is received, and the enhancement of the excitation signal is stopped. The two ground excitation sensors corresponding to the front row wheel shaft of the vehicle can directly bind the received sensor excitation feedback signals with the wheel positions. The two groups of excitation coils of each ground excitation module in the embodiment respectively send gradually enhanced excitation signals until receiving excitation feedback signals, judge the inner wheel or the outer wheel according to the position of the excitation coils, track the brake and inner and outer tire temperature values of the vehicle for a long time according to a cloud server, and adjust the positions of the inner wheel and the outer wheel again. For example, the excitation coil on the right side in the ground excitation module on the right side of the rear row is controlled to send out an excitation signal, the signal is gradually enhanced from small to large, and the sensor excited for the first time is considered to be the sensor corresponding to the received excitation feedback signal and is the sensor of the outer wheel of the composite wheel on the right side of the rear row of the vehicle. And the excitation signal is adjusted to be larger to excite the inner wheel. The excitation feedback signal comprises sensor information and tire information acquired by the sensor, and the tire information comprises tire temperature, tire pressure and the like.
As shown in fig. 6, in step 45, the processing of the excitation feedback data includes the following steps:
step 451: the terminal processing module enters a data processing flow;
step 452: deleting invalid data in the received excitation feedback data;
step 453: comparing the data, and storing the excitation feedback data into the corresponding wheel positions;
step 454: and finishing the processing of all the excitation feedback data and finishing the step.
The invalid data in step 452 includes data with a tire temperature and tire pressure of 0, repeated data, and the like.
In step 453, the data comparison process includes matching the sensor information and the wheel position of the excitation feedback data, where the wheel position of the sensor is determined according to the positions of the ground excitation modules and the positions of the excitation coils that emit the excitation signals, in this case, two groups of excitation coils in each ground excitation module individually emit the excitation signals, and the excitation signals are gradually increased.
The number n of times set in step 47 is 4 in this example.
In the step 6, in the running process of the vehicle, the vehicle-mounted terminal and the cloud server can collect the brake duration of the vehicle, after the vehicle is braked for 20 minutes in an accumulated mode, the tire temperature inside and outside the wheel positions of the group is compared, and the system with the continuously high temperature is adjusted to the position of the inner wheel again. The tire temperature is obtained through data collected by the sensor, and the brake duration is obtained through the vehicle-mounted terminal.
The above description is only one specific example of the present invention and should not be construed as limiting the invention in any way. It will be apparent to persons skilled in the relevant art(s) that, having the benefit of this disclosure and its principles, various modifications and changes in form and detail can be made without departing from the principles and structures of the invention, which are, however, encompassed by the appended claims.
Claims (10)
1. A wheel position positioning device of an automobile tire sensor is characterized by comprising a ground excitation module, a sensing module, a terminal processing module and a cloud end; the terminal processing module is in communication connection with the ground excitation module, the cloud end and the induction module respectively; the ground excitation module is buried in the ground, and is used for exciting the sensor in the tire, receiving the excitation feedback of the sensor and transmitting the excitation feedback to the terminal processing module; the cloud is used for storing and processing data uploaded by the terminal processing module; the sensing module is used for sensing the approach of a vehicle; the ground excitation module comprises a micro control unit, a drive circuit, an excitation coil, a wireless radio frequency circuit and a communication circuit; the micro control unit is respectively connected with the drive circuit, the communication circuit and the wireless radio frequency circuit; the drive circuit is also connected with a plurality of excitation coils; the communication circuit is used for realizing communication with the terminal processing module.
2. The wheel position locating device of a vehicle tire sensor according to claim 1, wherein the ground excitation module comprises six excitation coils, the six excitation coils being arranged on a same straight line L; the left three continuous exciting coils form one group, the right three continuous exciting coils form one group, the six exciting coils are divided into two groups, and the directions of the exciting coils in the same group are the same; the distance between the magnet exciting coils in the same group is a set value, and the distance between the magnet exciting coils in the two groups is also a set value.
3. A wheel position positioning method of an automobile tire sensor is characterized by comprising the following steps:
step 1: the terminal processing module finishes the starting initialization process;
step 2: sensing module acquiring image
And step 3: the sensing module judges whether a license plate exists in the acquired image; if the license plate exists, reading license plate information, transmitting the read license plate information to the terminal processing module, and entering the next step; otherwise, returning to the step 2;
and 4, step 4: the terminal processing module judges whether the vehicle enters a set position or not; starting an automatic positioning mode after the vehicle enters a set position; in the automatic positioning mode, acquiring information of a tire sensor through a ground excitation module;
and 5: uploading the tire sensor data to a cloud, and rewriting terminal wheel position configuration information on the vehicle after the cloud acquires the wheel position data;
step 6: the cloud end can track the brake and tire temperature conditions of the vehicle during operation for a long time, accurately correct the positions of the inner tire and the outer tire of the same re-wheel position, and re-write the wheel position configuration information of the vehicle-mounted terminal.
4. The method according to claim 3, wherein the terminal processing module in step 4 determines whether the vehicle enters a set position, including determining through an external infrared sensor and a pressure sensor, or through manual signal input, or through an interval set time after the sensing module collects the license plate image.
5. The wheel position locating method of the vehicle tire sensor according to claim 3, wherein the automatic locating mode in step 4 comprises the steps of:
step 41: the terminal processing module sets the ground excitation module as an excitation mode and sends an excitation command to the corresponding ground excitation module;
step 42: the ground excitation module judges whether an excitation command of the terminal processing module is received or not; if the excitation command is received, go to step 43; if the excitation command is not received, returning to step 41;
step 43: the control driving circuit drives the excitation coil to send out an excitation signal and receives excitation feedback of the sensor through the wireless radio frequency circuit;
step 44: the terminal processing module sets the ground excitation module as a reading mode, closes the excitation of the excitation module and sends a query command to the corresponding ground excitation module;
step 45: the ground excitation module judges whether an inquiry command is received or not; if the query command is received, transmitting the excitation feedback data to the terminal processing module, completing the processing and storage of the excitation feedback data in the terminal processing module, and entering step 46; otherwise, returning to the step 44;
step 46: the terminal processing module judges whether the query time reaches a set value; if the set value is reached, go to step 47; otherwise, returning to the step 44;
step 47: the terminal processing module judges whether the excitation times are greater than a set time n; if the number of times is more than the set number of times n, uploading the stored excitation feedback data to the cloud end, and ending the step; if the number of times is less than or equal to the set number of times n, the process returns to step 41.
6. The method as claimed in claim 5, wherein the excitation signal from the excitation coil is gradually increased from 0 in step 43 until the excitation feedback signal is received, and the increase of the excitation signal is stopped.
7. The method as claimed in claim 6, wherein the step 45 of processing the excitation feedback data comprises the steps of:
step 451: the terminal processing module enters a data processing flow;
step 452: deleting invalid data in the received excitation feedback data;
step 453: comparing the data, and storing the excitation feedback data into the corresponding wheel positions;
step 454: and finishing the processing of all the excitation feedback data and finishing the step.
8. The method as claimed in claim 7, wherein the excitation feedback signal of step 452 includes sensor information and tire information collected by the sensor, the tire information includes tire temperature and tire pressure; the invalid data comprises data with the tire temperature and the tire pressure of 0 and repeated data.
9. The method as claimed in claim 7, wherein the data comparison process comprises matching the sensor information of the excitation feedback data with the wheel position, wherein the wheel position of the sensor is determined according to the position of the ground excitation module and the position of the excitation coil which sends the excitation signal.
10. The method as claimed in claim 3, wherein in step 6, during the operation of the vehicle, the vehicle-mounted terminal and the cloud server collect the braking duration of the vehicle, and when the set accumulated braking duration is reached, the temperature of the inner and outer tires in the set of wheel positions is compared, and the system with the continuously higher temperature is adjusted to the inner wheel position again, so as to finish the fine calibration of the inner and outer tires in the wheel resetting position.
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| US20200406690A1 (en) * | 2018-03-16 | 2020-12-31 | Autel Intelligent Technology Corp., Ltd. | Tire positioning method and apparatus, electronic control unit and tire pressure sensor |
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| CN2725907Y (en) * | 2004-09-27 | 2005-09-14 | 重庆三信电子有限公司 | Automobile tyre pressure monitoring display system with exciter and its structural member |
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