CN116512823A - Method and programming device capable of rapidly and wirelessly programming multiple tire pressure sensors - Google Patents
Method and programming device capable of rapidly and wirelessly programming multiple tire pressure sensors Download PDFInfo
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- CN116512823A CN116512823A CN202310802406.0A CN202310802406A CN116512823A CN 116512823 A CN116512823 A CN 116512823A CN 202310802406 A CN202310802406 A CN 202310802406A CN 116512823 A CN116512823 A CN 116512823A
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Classifications
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention relates to the technical field of programming of tire pressure sensors, in particular to a method and a programming device capable of rapidly and wirelessly programming a plurality of tire pressure sensors, wherein the programming device comprises a first low-frequency module, a first radio frequency module, a storage module, a processing module, a display module and an input module, and the first low-frequency module and the first radio frequency module are electrically connected with the storage module; the invention can enable the programming device to carry out high-efficiency communication with a plurality of tire pressure sensors by making a communication protocol comprising frame header, data length, command, data and verification of the message, then scan the tire pressure sensors by the programming device, sequentially sort each tire pressure sensor, arrange the plurality of tire pressure sensors into a queue, confirm whether programming is needed for the tire pressure sensors after sorting is successful, and carry out programming according to the requirements.
Description
Technical Field
The invention belongs to the technical field of programming of tire pressure sensors, and particularly relates to a method and a programming device capable of rapidly and wirelessly programming a plurality of tire pressure sensors.
Background
The tyre pressure sensor is a monitoring module arranged on an automobile tyre, can detect tyre pressure, temperature, acceleration, battery voltage and the like, and transmits measured data after modulation through high-frequency radio waves (RF), and is mainly used for monitoring the tyre pressure in real time, alarming the tyre leakage and low air pressure and reminding a driver to take corresponding measures so as to ensure driving safety.
Before programming the tire pressure sensors, the programming device needs to scan how many tire pressure sensors to be programmed are nearby, and when a plurality of sensors respond to messages at the same time, high-frequency response collision can cause that some sensors cannot be scanned; in general, the programming device continuously transmits low frequency signals, the tire pressure sensors respond in multiple frames, or a random delay time is added when the tire pressure sensors respond, but the speed of the scanning sensor is extremely slow and still has the problem of high frequency signal collision, and all the sensors cannot be scanned, so that a method and a programming device capable of rapidly and wirelessly programming a plurality of tire pressure sensors are needed to solve the problems.
Disclosure of Invention
In view of the above problems, the present invention provides a method for rapidly and wirelessly programming a plurality of tire pressure sensors, comprising the steps of:
s1, making a communication protocol of a message consisting of a frame header, a data length, a command, data and verification, so that a programming device and a tire pressure sensor can carry out efficient communication;
s2, scanning chip IDs of a plurality of tire pressure sensors through a programming device, and receiving CID data of response of the tire pressure sensors in a single receiving period;
s3, sequencing each tire pressure sensor in sequence, and enabling the tire pressure sensors with the same CID to answer so as to enable the tire pressure sensors to be arranged into a queue;
s4, writing 1 into a mask bit of the corresponding serial number of the tire pressure sensor which is sequenced successfully, if the scanning is not overtime, continuing the scanning, if the scanning is overtime, ending the scanning step, if the mask is not valued, representing that the tire pressure sensor is not available, and exiting programming;
s5, comparing the current check values of all the sequenced tire pressure sensors with the file check values, and determining whether programming is needed according to the comparison values, wherein if the check values are the same, the current program of the tire pressure sensors is the same as the file to be programmed, and programming is not needed;
s6, erasing an application area aiming at the tire pressure sensor to be programmed;
s7, entering a programming mode to write data, and exiting the programming mode after programming is finished.
Further, in step S1, the tire pressure sensor includes a second low-frequency module, a second radio frequency module, a storage module, a data processing module and a measurement module, where the second low-frequency module and the second radio frequency module are electrically connected with the storage module, the storage module is electrically connected with the data processing module, and the data processing module is electrically connected with the measurement module.
Further, the frequency of the second low-frequency module is 125Khz, and the frequency of the second radio-frequency module is 315/433Mhz.
Further, in step S2, if the tire pressure sensor response is not received, the programming device needs to confirm whether the scanning time is overtime, if the scanning time is not overtime, the scanning needs to be continued, if the scanning time is overtime, whether the mask has a value needs to be confirmed, if the mask has no value, the programming device indicates that the tire pressure sensor is not present and exits, and if the mask has a value, the programming needs to be performed.
Further, the CID data is a combination of a chip type and a chip ID, the chip ID refers to a unique ID of each tire pressure sensor when leaving the factory, and the programming device distinguishes the tire pressure sensor through the unique ID, so that the tire pressure sensor chip IDs of different manufacturers are possibly identical, and the chip type needs to be added to distinguish in order to ensure the uniqueness of the chip ID.
Further, the scanning command sent by the programming device is 0x80, the data is xx, and when the 4 th byte of the tire pressure sensor ID & xx is equal to xx, the tire pressure sensor can respond, wherein xx is any value.
Further, after the programming device sends the scanning command, the programming device continuously receives the responses of the tire pressure sensors in a single receiving period, after the receiving is finished, all the tire pressure sensors responded in the single period are sequentially sequenced in the next step, the sequenced tire pressure sensors do not respond to the scanning command until the programming is exited, the value xx is changed after the sequencing is completed, and then the programming device scans again until no tire pressure sensor responds or overtime is achieved, and as the sequenced tire pressure sensors do not respond to the scanning command, the number of tire pressure sensors responding in each scanning is smaller and smaller, and the collision probability is lower and lower until no collision occurs.
Further, in step S3, the tire pressure sensors are in one-to-one communication with the encoding device, so that no collision problem exists, the tire pressure sensors are arranged into a queue, the positions of the tire pressure sensors in the queue are represented by POS, after the tire pressure sensors are ordered, the tire pressure sensors do not respond unordered any more, and even if more tire pressure sensors exist, the messages do not collide.
Further, in step S4, if the scanning is not timed out, continuing the scanning, wherein a mask of 0 represents no tire pressure sensor, and programming is not needed; in step S5, if the current verification value of the tire pressure sensor is the same as the file verification value, it is indicated that the current program of the tire pressure sensor is the same as the file to be programmed, and programming is not required.
Based on the method capable of rapidly and wirelessly programming the tire pressure sensors, the invention also provides a programming device capable of rapidly and wirelessly programming the tire pressure sensors, which comprises a first low-frequency module, a first radio frequency module, a storage module, a processing module, a display module and an input module, wherein the first low-frequency module and the first radio frequency module are electrically connected with the storage module, the storage module is electrically connected with the processing module, the processing module is electrically connected with the display module, and the display module is electrically connected with the input module; wherein the frequency of the first low frequency module is 125Khz, and the frequency of the first radio frequency module is 315/433Mhz.
The beneficial effects of the invention are as follows:
1. the invention can enable the programming device to carry out high-efficiency communication with a plurality of tire pressure sensors by making a communication protocol comprising frame header, data length, command, data and verification of the message, then scan the tire pressure sensors by the programming device, sequentially sort each tire pressure sensor, arrange the plurality of tire pressure sensors into a queue, confirm whether programming is needed for the tire pressure sensors after sorting is successful, and carry out programming according to the requirements.
2. According to the invention, through the arrangement of the programming device, after a scanning command is sent, the programming device continuously receives the responses of the tire pressure sensors in a single receiving period, and after the receiving is finished, all the tire pressure sensors responded in the single period are sequenced in sequence, the sequenced tire pressure sensors do not respond to the scanning command any more until the programming is stopped, the value xx is changed after the sequencing is finished, and then the scanning is performed again until no tire pressure sensor responds or overtime, and as the sequenced tire pressure sensors do not respond to the scanning command, the number of tire pressure sensors responding in each scanning is reduced, and the collision probability is reduced until no collision occurs, so that the time for scanning the tire pressure sensors is shortened, and the problem of no signal collision after subsequent communication can be guaranteed.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 shows a block flow diagram according to an embodiment of the invention;
FIG. 2 shows a flow chart according to an embodiment of the invention;
FIG. 3 illustrates a schematic diagram of a programming device receiving a reply tire pressure sensor in accordance with an embodiment of the invention;
fig. 4 shows a schematic diagram of a comparison of a plurality of tire pressure sensors before and after sequencing according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention provides a method capable of rapidly and wirelessly programming a plurality of tire pressure sensors, which is shown in fig. 1-2 and comprises the following steps:
s1, making a communication protocol of a message consisting of a frame header, a data length, a command, data and verification, so that a programming device and a tire pressure sensor can carry out efficient communication;
the message format is as follows:
LFH: low frequency frame header, e.g. 4C52
HFH: high-frequency frame heads, e.g. AAAB
len: cmd length+data length
cmd: communication command, cmd|0x40 in positive response, 0x7F in negative response
data: valid data
xor: checking, wherein the cmd+data has an xor check value
pos: sensor ordering position
error, error code.
S2, scanning chip IDs of a plurality of tire pressure sensors through a programming device, receiving CID data of tire pressure sensor responses in a single receiving period, if the tire pressure sensor responses are not received, confirming whether scanning time is overtime, if the scanning time is not overtime, continuing scanning, if the scanning time is overtime, ending the scanning, determining whether a sensor needing to be programmed exists or not through judging a mask of the tire pressure sensor, if the mask is not valued, exiting, and if the mask is valued, programming is needed;
the response mode of the tire pressure sensor during scanning is as follows:
the scanning command does not need negative acknowledgement, cid=chip type (1 byte) +chip ID (4 bytes) in the table, i.e. the CID data is a combination of chip type and chip ID;
the chip ID refers to that each tire pressure sensor has a unique identity ID when leaving the factory, and the programming device distinguishes the tire pressure sensor through the unique identity ID, and takes 4 bytes as the chip ID;
chip type: since the tire pressure sensor chip IDs of different manufacturers are likely to be identical, chip types are added here to distinguish so as to ensure uniqueness;
the scanning command of the programming device is 0x80, the data is xx (0-0 xFF), preliminary anti-collision is carried out through xx, when the 4 th byte & xx of the tire pressure sensor ID is equal to xx, the tire pressure sensor can respond, xx can be any value, but when xx is a certain value, no tire pressure sensor responds, an invalid scanning command can be generated, the transmitting time of each low-frequency message and the receiving time of a single period of scanning are wasted, and in practical application, the anti-collision effect can be achieved by switching back and forth by using 0x00 and 0x01 (any non-0 value and the best effect of 1).
Assume that there are currently 4 sensors: ID is 0xABCD1234, 0xACCA4321, 0x12DB7535, 0x7A8B556A, respectively; when xx is equal to 0x01, then 0xACCA4321, 0x12DB7535 will respond;
xx is equal to 0x00, then 0xABCD1234, 0x7A8B556A will respond;
xx is equal to 0x08, then 0x7A8B556A will respond;
meanwhile, after receiving the scanning command of 0x80, the tire pressure sensor will delay (random valueSingle frame message reply time) to reply,further collision prevention, a random value of 0-15 (16 sensors, so 0-15);
after sending the 0x80xx scanning command, the programming device performs the following steps within a single receiving periodSingle frame message response time) can continuously receive the responses of the tire pressure sensors, after the reception is finished, sequentially sequencing all the tire pressure sensors responded in a single period, the sequenced tire pressure sensors do not respond to the scanning command any more until the programming is exited, the value xx is changed after the sequencing is completed, and then the scanning is performed again until no tire pressure sensor responds or overtime is achieved, and as the sequenced tire pressure sensors do not respond to the scanning command, the number of tire pressure sensors responding in each scanning is reduced, and the collision probability is reduced until no collision.
S3, sequencing each tire pressure sensor in sequence, and enabling the tire pressure sensors with the same CID to answer so as to enable the tire pressure sensors to be arranged into a queue;
the tire pressure sensor response mode at the time of sorting is as follows:
in this step, the tire pressure sensors are in one-to-one communication with the encoding device, so that no collision problem exists, the tire pressure sensors are arranged into a queue, the positions of the tire pressure sensors in the queue are indicated by POS, after the tire pressure sensors are ordered, the tire pressure sensors can not respond unordered, and even if more tire pressure sensors exist, the messages are not collided, as shown in fig. 4.
And S4, sequentially writing 1 into mask bits of corresponding serial numbers of the tire pressure sensors which are sequenced successfully, judging whether scanning is overtime, ending the scanning if overtime, continuing the scanning if overtime, and if not, indicating that no tire pressure sensor exists if the final mask is 0, and programming is not needed.
S5, reading current check values of all sequenced tire pressure sensors, comparing the current check values with file check values, and confirming whether programming is needed according to the comparison values; if the check values are the same, the current program of the tire pressure sensor is the same as the file to be programmed, and programming is not needed.
The response mode of the tire pressure sensor during reading is shown in the following table:
MASK2 bytes, 16 bits total, corresponding to 16 tire pressure sensors
Pos：1MASK:0x0001,Pos：2MASK:0x0002,Pos：3MASK:0x0004,Pos：4MASK:0x0008,
Pos：5MASK:0x0010,Pos：6MASK:0x0020,Pos：7MASK:0x0040,Pos：8MASK:0x0080,
Pos：9MASK:0x0100,Pos：10MASK:0x0200,Pos：11MASK:0x0400,Pos：12MASK:0x0800,
Pos：13MASK:0x1000,Pos：14MASK:0x2000,Pos：15MASK:0x4000,Pos：16MASK:0x8000;
The MASK can control the corresponding tire pressure sensor to respond to the message, and when the MASK corresponding to the pos of the tire pressure sensor is 0, the message is ignored and is not processed;
when MASK is 0xFFFF, the tire pressure sensors respond, and the tire pressure sensors sequentially respond from pos1 to pos16, and each pos is spaced by T1 ms, so that the tire pressure sensors wait for responseA millisecond;
to further optimize the communication time, the response of the tire pressure sensor is not only controlled by pos, but also related to MASK, such as:
when MASK is 0x8000, if it is directly controlled by pos, only 1 tire pressure sensor needs to respond, but because the corresponding pos is 16, it is necessary to waitResponse is made in milliseconds; then in order to avoid this time waste, the tire pressure sensor also needs to judge the MASK, judge how many bits of MASK are 1 before the own pos, and only need to wait +.>A millisecond;
when MASK is 0x8000, since n is 0, pos16 does not need to wait and immediately send;
when MASK is 0x1040, corresponding to pos13, pos7, pos13 waitsMillisecond, pos7, sent immediately, as shown in fig. 3;
the programming device presets a maximum timeout period when receiving the response, and if the pos corresponding to the MASK responds within the timeout period, the corresponding MASK is at the position 0, and when all the tire pressure sensors corresponding to the MASK respond, the MASK is equal to 0, and at the moment, even if the time is not timed out yet, the current communication is ended, and the next operation is performed, so that the communication time is optimized.
S6, erasing an application area aiming at the tire pressure sensor to be programmed;
the tire pressure sensor response mode at the time of erasure is shown in the following table:
s7, entering a programming mode to write data, and exiting the programming mode after programming is finished. At this time, the POS will clear, and after exiting the programming mode, will respond to the scan command again.
The response mode of the tire pressure sensor at the time of programming is as follows:
the response mode of the tire pressure sensor at the time of exit is shown in the following table:
wherein, the reading, erasing, programming and exiting are only functional differences, and the MASK and pos are used for optimizing the communication time and preventing collision;
based on the method capable of rapidly and wirelessly programming the tire pressure sensors, the invention also provides a programming device capable of rapidly and wirelessly programming the tire pressure sensors, which comprises a first low-frequency module, a first radio frequency module, a storage module, a processing module, a display module and an input module, wherein the first low-frequency module and the first radio frequency module are electrically connected with the storage module, the storage module is electrically connected with the processing module, the processing module is electrically connected with the display module, and the display module is electrically connected with the input module; wherein the frequency of the first low-frequency module is 125Khz, and the frequency of the first radio-frequency module is 315/433Mhz;
the tire pressure sensor comprises a second low-frequency module, a second radio frequency module, a storage module, a data processing module and a measuring module, wherein the second low-frequency module and the second radio frequency module are electrically connected with the storage module, the storage module is electrically connected with the data processing module, the data processing module is electrically connected with the measuring module, the frequency of the second low-frequency module is 125Khz, the frequency of the second radio frequency module is 315/433Mhz, the first low-frequency module and the second low-frequency module are correspondingly arranged, and the first radio frequency module and the second radio frequency module are correspondingly arranged.
The programming device is communicated with the tire pressure sensor through the first low-frequency module, the second low-frequency module, the first radio frequency module and the second radio frequency module, wherein the tire pressure sensor only receives low-frequency data and transmits high-frequency 315/433Mhz data, and the programming device only transmits low-frequency data and receives high-frequency data.
Although the 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 scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for rapid wireless programming of a plurality of tire pressure sensors, comprising: the method comprises the following steps:
s1, making a communication protocol of a message consisting of a frame header, a data length, a command, data and verification, so that a programming device and a tire pressure sensor can carry out efficient communication;
s2, scanning chip IDs of a plurality of tire pressure sensors through a programming device, and receiving CID data of response of the tire pressure sensors in a single receiving period;
s3, sequencing each tire pressure sensor in sequence, and enabling the tire pressure sensors with the same CID to answer so as to enable the tire pressure sensors to be arranged into a queue;
s4, writing 1 into a mask bit of the corresponding serial number of the tire pressure sensor which is sequenced successfully, if the scanning is not overtime, continuing the scanning, if the scanning is overtime, ending the scanning step, if the mask is not valued, representing that the tire pressure sensor is not available, and exiting programming;
s5, comparing the current check values of all the sequenced tire pressure sensors with the file check values, and determining whether programming is needed according to the comparison values, wherein if the check values are the same, the current program of the tire pressure sensors is the same as the file to be programmed, and programming is not needed;
s6, erasing an application area aiming at the tire pressure sensor to be programmed;
s7, entering a programming mode to write data, and exiting the programming mode after programming is finished.
2. A method of rapidly and wirelessly programming a plurality of tire pressure sensors as in claim 1, wherein: in step S1, the tire pressure sensor includes a second low-frequency module, a second radio frequency module, a storage module, a data processing module and a measurement module, where the second low-frequency module and the second radio frequency module are electrically connected with the storage module, the storage module is electrically connected with the data processing module, and the data processing module is electrically connected with the measurement module.
3. A method of rapidly and wirelessly programming a plurality of tire pressure sensors as in claim 2, wherein: the frequency of the second low-frequency module is 125Khz, and the frequency of the second radio-frequency module is 315/433Mhz.
4. A method of rapidly and wirelessly programming a plurality of tire pressure sensors according to claim 3, wherein: in step S2, if the response of the tire pressure sensor is not received, the programming device needs to confirm whether the scanning time is overtime, if the scanning time is not overtime, the scanning needs to be continued, if the scanning time is overtime, the scanning is ended, whether the sensor needing to be programmed exists or not is determined by judging the mask of the tire pressure sensor, if the mask has no value, the programming is needed, and if the mask has a value, the programming is needed.
5. A method of rapidly and wirelessly programming a plurality of tire pressure sensors as in claim 4, wherein: the CID data is the combination of the chip type and the chip ID, the chip ID refers to that each tire pressure sensor has a unique identity ID when leaving the factory, and the programming device distinguishes the tire pressure sensor through the unique identity ID.
6. A method of rapidly and wirelessly programming a plurality of tire pressure sensors as in claim 5, wherein: the scanning command sent by the programming device is 0x80, the data is xx, and when the 4 th byte of the tire pressure sensor ID & xx is equal to xx, the tire pressure sensor can respond, wherein xx is any value.
7. A method of rapidly and wirelessly programming a plurality of tire pressure sensors as in claim 6, wherein: after the programming device sends the scanning command, the response of the tire pressure sensors can be continuously received in a single receiving period, after the receiving is finished, all the tire pressure sensors responded in the single period are sequentially sequenced in the next step, the sequenced tire pressure sensors do not respond to the scanning command until the programming is stopped, the value xx is changed after the sequencing is finished, the scanning is performed again until no tire pressure sensor responds or overtime, and as the sequenced tire pressure sensors do not respond to the scanning command, the tire pressure sensors responding in each scanning are less and less, and the collision probability is lower and lower until no collision.
8. A method of rapidly and wirelessly programming a plurality of tire pressure sensors as in claim 7, wherein: in step S3, the tire pressure sensors are in one-to-one communication with the encoding device, so that no collision problem exists, the tire pressure sensors are arranged into a queue, the positions of the tire pressure sensors in the queue are represented by POS, after the tire pressure sensors are ordered, the tire pressure sensors can not respond unordered, and even if more tire pressure sensors exist, the messages are not collided.
9. A method of rapidly and wirelessly programming a plurality of tire pressure sensors as in claim 8, wherein: in step S4, if the scanning is not overtime, the scanning is continued, if the scanning is overtime, the scanning is ended, if the mask has no value, the mask represents that the tire pressure sensor is not present, and the programming is exited; in step S5, if the current verification value of the tire pressure sensor is the same as the file verification value, it is indicated that the current program of the tire pressure sensor is the same as the file to be programmed, and programming is not required.
10. A programming device capable of fast wireless programming of a plurality of tire pressure sensors, a method capable of fast wireless programming of a plurality of tire pressure sensors based on any one of claims 1-9, characterized in that: the device comprises a first low-frequency module, a first radio frequency module, a storage module, a processing module, a display module and an input module, wherein the first low-frequency module and the first radio frequency module are electrically connected with the storage module, the storage module is electrically connected with the processing module, the processing module is electrically connected with the display module, and the display module is electrically connected with the input module; wherein the frequency of the first low frequency module is 125Khz, and the frequency of the first radio frequency module is 315/433Mhz.
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| CN112319146A (en) * | 2020-10-16 | 2021-02-05 | 深圳市云伽智能技术有限公司 | Learning method, device, sensor, system and medium of tire pressure monitoring system |
| WO2022228083A1 (en) * | 2021-04-30 | 2022-11-03 | 华为技术有限公司 | Method for establishing connection between multiple devices, and device |
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