CN114043827B - Tire pressure signal processing method and device - Google Patents

Abstract

The invention provides a tire pressure signal processing method and device. The method includes: determining the running frame data, the first data and the actual baud rate based on the pre-acquired original tire pressure signal and the pre-acquired signal level status data. ; Determine the baud rate clock based on the actual baud rate; collect the first data within the time range corresponding to the baud rate clock as the second data; according to the preset format configuration rules, the preset length configuration rules and the second data , determine the synchronization frame data and the third data; use the running frame data, the synchronization frame data, the third data and the actual baud rate as the processed tire pressure signal, and send the processed tire pressure signal to the preset detection circuit. This method can perform validity detection and synchronization matching on the original tire pressure signal, which helps the tire pressure status detected by subsequent circuits to be more accurate.

Description

Tire pressure signal processing method and device

Technical field

The present invention relates to the field of signal processing technology, and in particular, to a tire pressure signal processing method and device.

Background technique

During the driving of the vehicle, the tire pressure of the tires will continue to change, so the tire pressure signal needs to be monitored in real time to ensure the safe driving of the vehicle. Currently, the tire pressure signals collected by the sensors of the tire pressure monitoring system have various communication formats, so it is impossible to accurately collect tire pressure signals with reference significance, and it is also impossible to effectively process the tire pressure signals, so that the tire pressure status of the tires cannot be accurately judged.

Contents of the invention

Based on this, the purpose of the present invention is to provide a tire pressure signal processing method and device to perform validity detection and synchronization matching on the original tire pressure signal, which helps subsequent circuits detect a more accurate tire pressure state.

In a first aspect, the present invention provides a method for processing tire pressure signals. The method includes: determining the running frame data, the first data and the actual baud based on the pre-acquired original tire pressure signal and the pre-acquired signal level status data. rate; determine the baud rate clock according to the actual baud rate; collect the first data within the time range corresponding to the baud rate clock as the second data; according to the preset format configuration rules, the preset length configuration rules and the second data, determine the synchronization frame data and the third data; use the running frame data, the synchronization frame data, the third data and the actual baud rate as the processed tire pressure signal, and send the processed tire pressure signal to the preset detection circuit .

In an optional implementation, the status of the signal level status data includes a high level width status and a low level width status; the running frame data is determined based on the pre-acquired original tire pressure signal and the pre-acquired signal level status data. , the steps of first data and actual baud rate include: performing edge detection on the original tire pressure signal; judging whether the state of the signal level status data is a high level width state; if the edge detection is successful and the signal level If the state of the status data is a high level width state, then the running frame data in the original tire pressure signal is extracted; other data in the original tire pressure signal except the running frame data is used as the first data; according to the running frame data, Determine the actual baud rate.

In an optional implementation, the method further includes: if the edge detection is successful and the state of the signal level status data is a high level width state, then adding one to the number of times valid original tire pressure signals are generated; if the signal level status data is continuously generated If the number of valid original tire pressure signals reaches the preset number, multiple running frame data will be extracted; if the number of valid raw tire pressure signals continuously generated the preset number of times does not reach the preset number, the extraction of multiple running frame data will not be performed. step.

In an optional implementation, the step of determining the actual baud rate based on the running frame data includes: dividing the total duration of multiple running frame data by the number of running frame data to obtain the actual baud rate.

In an optional implementation, the method further includes: if the number of times valid original tire pressure signals are continuously generated reaches a preset number of times, generating an effective locking signal of the original tire pressure signal, where the effective locking signal is an enable signal.

In an optional embodiment, the step of collecting the first data within the time range corresponding to the bit rate clock as the second data includes: if a valid lock signal is generated, collecting the first data within the time range corresponding to the bit rate clock. Data; combine multiple first data into second data.

In an optional implementation, the step of determining the synchronization frame data and the third data according to the preset format configuration rules, the preset length configuration rules and the second data includes: combining the second data with the preset format configuration Rules and preset length configuration rules are matched to obtain a matching result; if the matching result indicates that the match is successful, synchronization frame data and third data are extracted from the second data, where the third data includes data frame data and verification frame data. .

In an optional implementation, the step of determining the baud rate clock based on the actual baud rate includes: determining the baud rate clock based on the actual baud rate or a preset baud rate obtained in advance.

In an optional embodiment, the method further includes: collecting a first tire pressure signal of tire pressure through a tire pressure sensor; filtering the first tire pressure signal to obtain an original tire pressure signal.

In a second aspect, the present invention provides a tire pressure signal processing device. The device includes: a first processing unit, configured to determine the running frame data, the third signal level status data based on the pre-acquired original tire pressure signal and the pre-acquired signal level status data. One data and the actual baud rate; the second processing unit is used to determine the baud rate clock according to the actual baud rate; the third processing unit is used to collect the first data within the time range corresponding to the baud rate clock as the third the second data; the fourth processing unit, used to determine the synchronization frame data and the third data according to the preset format configuration rules, the preset length configuration rules and the second data; the output unit, used to convert the running frame data, the synchronization frame The data, the third data and the actual baud rate are used as the processed tire pressure signal, and the processed tire pressure signal is sent to the preset detection circuit.

The beneficial effects of the present invention are as follows:

The invention provides a tire pressure signal processing method and device. The method includes: determining the running frame data, the first data and the actual baud rate based on the pre-acquired original tire pressure signal and the pre-acquired signal level status data. ; Determine the baud rate clock based on the actual baud rate; collect the first data within the time range corresponding to the baud rate clock as the second data; according to the preset format configuration rules, the preset length configuration rules and the second data , determine the synchronization frame data and the third data; use the running frame data, the synchronization frame data, the third data and the actual baud rate as the processed tire pressure signal, and send the processed tire pressure signal to the preset detection circuit. This method can perform validity detection and synchronization matching on the original tire pressure signal, which helps the tire pressure status detected by subsequent circuits to be more accurate.

Other features and advantages of the invention will be set forth in the subsequent description, or some of the features and advantages may be inferred or unambiguously determined from the description, or may be learned by practicing the above-mentioned techniques of the invention.

In order to make the above objects, features and advantages of the present invention more obvious and easy to understand, the preferred embodiments are described in detail below along with the accompanying drawings.

Description of the drawings

In order to more clearly explain the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description The drawings illustrate some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting any creative effort.

Figure 1 is a flow chart of a tire pressure signal processing method provided by an embodiment of the present invention;

Figure 2 is a flow chart of a second tire pressure signal processing method provided by an embodiment of the present invention;

Figure 3 is a schematic diagram of an example of a frame format provided by an embodiment of the present invention;

Figure 4 is a schematic diagram of a tire pressure signal processing device provided by an embodiment of the present invention;

Figure 5 is a schematic diagram of a tire pressure signal processing system provided by an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, rather than all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Therefore, the following detailed description of the embodiments of the invention provided in the appended drawings is not intended to limit the scope of the claimed invention, but rather to represent selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

Currently, tire pressure monitoring systems use various sensor signal communication formats. Signals between different products are generally transmitted using standard Manchester encoding, differential Manchester encoding and inverse Manchester encoding formats. However, these methods cannot be synchronized. It is impossible to test the validity and classify all signals. Therefore, designing a low-cost and high-performance frame synchronization detection method for signals in Manchester encoding and extended code formats has become an urgent technical problem to be solved. Based on this, the present invention provides a method and device for processing tire pressure signals, and this solution is applied in the scenario of tire pressure detection.

Embodiment 1

An embodiment of the present invention provides a method for processing tire pressure signals, as shown in Figure 1. The method includes:

Step S102: Determine the running frame data, the first data and the actual baud rate based on the pre-acquired original tire pressure signal and the pre-acquired signal level status data.

Specifically, this step is performed by the validity detection module, and the purpose of this step is to detect the validity of the original tire pressure signal. Moreover, this step will also generate an effective locking signal of the original tire pressure signal, which is the enable signal of the subsequent frame synchronization module.

Step S104: Determine the baud rate clock based on the actual baud rate.

Specifically, this step is performed by the baud rate clock module, with the purpose of generating a baud rate clock for subsequent use.

Step S106: Collect the first data within the time range corresponding to the bit rate clock as the second data.

Step S108: Determine the synchronization frame data and the third data according to the preset format configuration rules, the preset length configuration rules and the second data.

Step S110, use the running frame data, the synchronization frame data, the third data and the actual baud rate as the processed tire pressure signal, and send the processed tire pressure signal to the preset detection circuit.

Specifically, steps S106 to S110 are executed by the frame synchronization module, and the main purpose is to perform frame synchronization processing on the signal.

The invention provides a tire pressure signal processing method. The method includes: determining the running frame data, the first data and the actual baud rate according to the pre-acquired original tire pressure signal and the pre-acquired signal level status data; Actual baud rate, determine the baud rate clock; collect the first data within the time range corresponding to the baud rate clock as the second data; determine according to the preset format configuration rules, preset length configuration rules and the second data Synchronize the frame data and the third data; use the running frame data, the synchronization frame data, the third data and the actual baud rate as the processed tire pressure signal, and send the processed tire pressure signal to the preset detection circuit. This method can perform validity detection and synchronization matching on the original tire pressure signal, which helps the tire pressure status detected by subsequent circuits to be more accurate.

Embodiment 2

The embodiment of the present invention provides a second tire pressure signal processing method, as shown in Figure 2. The method includes:

Step S202: Collect the first tire pressure signal of the tire pressure through the tire pressure sensor; filter the first tire pressure signal to obtain the original tire pressure signal.

Specifically, first, a sensor is preset at the tire. The tire pressure sensor collects the first tire pressure signal (also called rx_data or the first baseband signal) of the tire pressure, and transmits the first tire pressure signal to the validity detection module. ; Then, the validity detection module performs filtering on the first tire pressure signal to obtain the original tire pressure signal. In addition, the validity detection module will only work after receiving the enable signal (ie dbr_en) provided by the user. After starting to work, the validity detection module will be in a high level state.

Step S204: Perform edge detection on the original tire pressure signal.

Specifically, this step is performed by the validity detection module. The validity detection module will continue to detect whether the original tire pressure signal contains an edge signal (ie, edge_det signal, edge signal) based on the system clock. If no edge_det signal is detected, the validity detection module state will remain in the zeroth state ( That is, BAUD_DET_ST0), if the edge_det signal is received (that is, the edge detection is successful), the validity detection module will enter the first state (BAUD_DET_ST1), and then detect again. If the edge_det signal is received again, step S206 will be executed. If not edge_det signal, the BAUD_DET_ST1 state remains unchanged.

Step S206: Determine whether the state of the signal level state data is a high level width state.

In specific implementation, the state of the signal level state data includes a high level width state and a low level width state.

Specifically, the judgment step is: the validity detection module compares the manually input detection signal with baud_div[15:0] (ie, the frequency division coefficient) to obtain the absolute value of the error. If the absolute value of the error is within the threshold baud_th[15:0]( Within the preconfigured baud rate error threshold), a pulse baud_valid signal (ie, signal level status data) is generated. According to the pulse baud_valid signal, it can be determined whether the state of the signal level status data is a high level width state or a low level width state. Note that baud_th[15:0] and baud_div[15:0] are used to configure the CDC module baud rate in combination, and a single baud_div configures the BAUD generator baud rate.

Step S208, if the edge detection is successful and the state of the signal level state data is a high level width state, the running frame data in the original tire pressure signal is extracted.

In the specific implementation, if the edge detection is successful and the state of the signal level status data is a high level width state, the number of times valid original tire pressure signals are generated is increased by one; if the number of times valid original tire pressure signals are generated continuously When the preset number of times is reached, multiple running frame data are extracted; if the preset number of consecutive valid original tire pressure signals are not generated, the step of extracting multiple running frame data is not performed.

Specifically, the signal level status data is also called the baud_valid signal and is used to receive the sampling point of the signal.

Specifically, when sampling starts again, the system also maintains the sampling edge signal edge_det. If there is no edge_det signal, the BAUD_DET_ST1 state remains unchanged. If an edge_det signal arrives, it begins to determine whether the baud_valid signal is high level (i.e. high level). Width state), if it is high level, the state machine enters the next state BAUD_DET_ST2. If baud_valid is low level (i.e., low level width state), it means a detection error, return to the initial state BAUD_DET_ST0 and start the cycle again; enter BAUD_DET_ST2 After the state, the system also maintains the sampling edge signal edge_det. If there is no edge_det signal, the BAUD_DET_ST2 state remains unchanged. If an edge_det signal arrives, it begins to determine whether the baud_valid signal is high level. If it is high level, the state machine Enter the next state BAUD_DET_ST3. If baud_valid is low level, it means a detection error. Return to the initial state BAUD_DET_ST0 and start the cycle again; and so on until reaching BAUD_DET_ST7. This number of cycles can be set according to the user's needs. For example, if this application sets it to 7 times, then only when edge_det is received 6 times continuously, it means that the original tire pressure signal is valid and meets the user's needs. At this time, the running frame data can be extracted from each original tire pressure signal. The other data of the original tire pressure signal except the running frame data is called the first data (also called cdc_data), and the first data will also be sent to Frame synchronization module for subsequent calls.

Step S210: If the number of times valid original tire pressure signals are continuously generated reaches a preset number of times, a valid locking signal of the original tire pressure signal is generated, where the valid locking signal is an enable signal.

Specifically, if the running frame data can be extracted from each original tire pressure signal, the validity detection module can also determine that these original tire pressure signals are valid, and will simultaneously generate a valid locking signal of the original tire pressure signal. (also called lock). The validity detection module (also known as the CDR module) will input the valid lock signal to the subsequent frame synchronization module (also known as the SYNC module). The valid lock signal is equivalent to the trigger signal or enable signal of the frame synchronization module.

Step S212: Divide the total duration of multiple running frame data by the number of running frame data to obtain the actual baud rate.

Specifically, the entire system is equipped with a system clock (ie clk), and the validity detection module can divide the total duration of multiple running frame data by the number of running frame data to obtain the actual baud rate. The validity detection module sends the actual baud rate (ie baud_auto[15:0]) to the baud rate clock module.

Step S214: Determine the baud rate clock based on the actual baud rate or the preset baud rate obtained in advance.

Specifically, this step is performed by the baud rate clock module (also known as BAUD_generator module), which is used to generate the baud rate clock (ie baud_clk) and send it to the frame synchronization module.

Specifically, according to the value of baud_manul (manually selected baud rate), you can choose to use the manual baud rate configuration through baud_div[15:0], or use the actual baud rate configuration detected by the CDR module (ie, validity detection module) baud_auto[15:0]. When the manually input baud_manul is 1, select baud_div[15:0] (that is, select the manual baud rate configuration), and when it is 0, select baud_auto[15:0] (that is, select the actual baud rate calculated by the CDR module). In this step, the actual baud rate or the manually configured baud rate can be selected according to the user's needs. The existing technology can generally only perform subsequent calculations through the manually configured baud rate. However, this manually configured baud rate has a large error and is not accurate. The degree is far inferior to the actual baud rate calculated by the validity detection module.

Step S216: If a valid lock signal is generated, collect the first data within the time range corresponding to the bit rate clock; combine the plurality of first data into second data.

Specifically, this step is performed by the frame synchronization module. When the frame synchronization module receives a valid lock signal, it starts working and collects the corresponding first data according to the baud rate clock.

Step S218: Match the second data with the preset format configuration rules and the preset length configuration rules to obtain a matching result; if the matching result indicates that the match is successful, extract the synchronization frame data and the third data from the second data.

In specific implementation, the third data includes data frame data and check frame data.

Specifically, this step is performed by the frame synchronization module. Match the second data with the preset format configuration rules (ie, sync_pt[31:0]) and the preset length configuration rules (sync_pt_length[5:0]). If the match is successful, the frame synchronization is deemed to be successful, then The synchronization frame data (i.e., sync_data) and the third data can be extracted from the second data, and the frame synchronization success level signal (i.e., sync_det, synchronization flag signal) can also be generated. At the same time, it can also be synchronized through sync_timeout_th (time synchronization device) Configure the timing of all raw tire pressure signals. Here, the other data in the second data except the synchronization frame data is third data, and the third data generally includes data frame data and check frame data.

Specifically, at this point, the original tire pressure signal has been decomposed into four parts, namely running frame data (also called RUNING), synchronization frame data (also called SYNC), data frame data (also called DATA) and calibration Frame check data (also called CRC). The specific contents of these four parts are: RUNING: 6~128chips, SYNC: 1~32chips, high bit first out; DATA1~256bit, high bit first out, AES encryption (optional); CRC: CRC-8 (x8+x2+x1 +1). Specifically, Figure 3 shows a schematic diagram of an example frame format, RUNING12chips; SYNC:11110110chips; DATA: 0101100100100bits.

Specifically, if no matching is successful, all modules are reset and step S202 is executed again.

Step S220: Use the running frame data, the synchronization frame data, the third data and the actual baud rate as the processed tire pressure signal, and send the processed tire pressure signal to the preset detection circuit.

This embodiment provides a method for processing tire pressure signals. This method performs edge detection and validity testing on the signal through a validity detection module; performs time correction on the signal through a baud rate clock module; and performs time correction on the signal through a frame synchronization module. The signals are synchronized and matched. Through these methods, the format of the original data is split, that is, the original tire pressure signal is divided into four parts and transmitted to the subsequent detection circuit, so that the subsequent detection circuit can more accurately analyze the tire pressure. Accurate detection.

Embodiment 3

The present invention provides a tire pressure signal processing device, as shown in Figure 4. The device includes:

The first processing unit 41 is configured to determine the running frame data, the first data and the actual baud rate based on the pre-acquired original tire pressure signal and the pre-acquired signal level status data.

The second processing unit 42 is used to determine the baud rate clock according to the actual baud rate.

The third processing unit 43 is used to collect the first data within the time range corresponding to the bit rate clock as the second data.

The fourth processing unit 44 is configured to determine the synchronization frame data and the third data according to the preset format configuration rules, the preset length configuration rules and the second data.

The output unit 45 is used to use the running frame data, the synchronization frame data, the third data and the actual baud rate as the processed tire pressure signal, and send the processed tire pressure signal to the preset detection circuit.

The implementation principle and technical effects of the tire pressure signal processing device provided by the embodiments of the present invention are the same as those of the foregoing method embodiments. For the purpose of brief description, for parts not mentioned in the device embodiments, please refer to the foregoing method embodiments. Corresponding content.

Embodiment 4

The embodiment of the present invention provides a tire pressure signal processing system 50. As shown in Figure 5, the system includes three modules: a validity detection module 51, a baud rate clock module 52 and a frame synchronization module 53. Connected in turn, the validity detection module 51 and the frame synchronization module 53 are also connected.

The workflow of this system is as follows:

1. Install sensors on the tires.

2. The sensor collects the first tire pressure signal in real time.

3. Send the first tire pressure signal to the CDR module, which is used to detect valid signals.

4. The CDR module filters the initial tire pressure signal to obtain the filtered tire pressure signal, which is the original tire pressure signal. (The CDR module will not start subsequent work until it receives the enable signal dbr_en input by the user).

5. Confirm the level width. This confirmation result is obtained based on the data input by the user. The specific method is: based on baud_div and baud_th, calculate the corresponding pulse signal: baud_valid, and determine the level state based on the pulse signal: baud_valid.

6. The CDR module will also determine whether the filtered tire pressure signal is a valid tire pressure signal. The judgment method is: perform edge detection on the filtered tire pressure signal. If the edge detection is successful (that is, the edge_det signal is detected, that is, the pulse exists, the state machine enters the BAUD_DET_ST1 state; when sampling is started again, the system also maintains the sampling edge signal edge_det, If there is no edge_det signal, the BAUD_DET_ST1 state remains unchanged. If there is an edge_det signal, it is judged whether the baud_valid signal is high level. If it is high level, the state machine enters the next state BAUD_DET_ST2. If baud_valid is low level, If it is flat, it means that the detection error has occurred, return to the initial state BAUD_DET_ST0 and start the cycle again; after entering the BAUD_DET_ST2 state, the system also maintains the sampling edge signal edge_det. If there is no edge_det signal, the BAUD_DET_ST2 state remains unchanged. If an edge_det signal arrives, the system starts at this time. Determine whether the baud_valid signal is high level. If it is high level, the state machine enters the next state BAUD_DET_ST3. If baud_valid is low level, it indicates a detection error and returns to the initial state BAUD_DET_ST0 to start the cycle again. And so on, until Reaching BAUD_DET_ST7, the state machine will remain in this state at this time, indicating that RUNING reception has ended, more than 6 chips of RUNING signals have been received, and the valid signal flag lock can be obtained (this is equivalent to the enable signal of the SYNC module). As the trigger signal of the SYNC module. Naturally, the filtered tire pressure signal can be decomposed into four parts: RUNING, and other parts (ie, the first data).

7. Calculate the actual baud rate and enter the actual baud rate into the BAUD_generator module. (The CDR module, BAUD_generator module, and SYNC module are all equipped with a system clock device).

Divide the total duration of multiple RUNINGs ÷ the number of times = the actual baud rate.

8. The BAUD_generator module can receive the actual baud rate, as well as the manually input baud rate. The user can choose the baud rate input by himself, or select the actual baud rate as the baud rate clock baud_clk to output to the SYNC module. (When baud_manul is 1, select the baud rate you entered, and when it is 0, select the actual baud rate). Generally, the actual baud rate is selected, which is more accurate.

9. The SYNC module received the baud rate clock baud_clk and the enable signal (valid signal flag lock) and cdc_data (ie, the first data).

10. According to the baud rate clock baud_clk, collect cdc_data and obtain the target cdc_data (ie, the second data).

Match the format of the SYNC data in the target cdc_data with sync_pt[31:0] and the length with sync_pt_length[5:0]. If both are matched, the frame synchronization is deemed to be successful, and the synchronization flag signal sync_det is generated. In this way, the sync_data data can be extracted from the second data. The data in the second data except the sync_data data is the third data, which generally includes DATA and CRC. Sync_det can also be generated based on sync_data.

Otherwise, the above calculations are invalid and the whole process starts again.

11. Send sync_det, sync_data, RUNING, DATA, CRC and actual baud rate as processed tire pressure signal data to subsequent circuits.

The implementation principle and technical effects of the tire pressure signal processing system provided by the embodiments of the present invention are the same as those of the foregoing method embodiments. For the sake of brief description, for parts not mentioned in this embodiment, please refer to the foregoing method embodiments. Corresponding content.

Embodiment 5

Embodiments of the present invention provide a third tire pressure signal processing method, which method includes:

The data rx_data received by the sensor first enters the CDR module, and the signal baud rate is detected according to the configured baud rate error threshold baud_th[15:0] and frequency division coefficient baud_div[15:0]. When a matching baud rate is detected , output the lock signal, active high level, and pass the data cdc_data to the SYNC module.

At the same time, the actual baud rate of the detected signal is passed to the BAUD_generator module through baud_auto[15:0]. After the BAUD_generator module divides the clock, it generates baud_clk and sends it to the SYNC module.

The SYNC module configures the synchronization format through the synchronization mode sync_pt[31:0] and the synchronization mode length sync_pt_length[5:0]. After receiving the high-level lock signal, baud_clk is used to sample cdc_data. When it detects that the synchronization pattern matches After the signal is generated, the synchronization flag signal sync_det is generated, which is active at high level, and the data is transferred to the subsequent circuit through sync_data.

The CDR module is used to detect valid signals and has the following ports: rx_data, baud_div[15:0], baud_th[15:0], baud_auto[15:0], cdc_data and lock.

The BAUD_generator module is used to generate a baud rate clock and has the following ports: baud_manul, baud_auto[15:0] and baud_div[15:0].

The SYNC module is used for frame synchronization and has the following ports: baud_clk, cdc_data, lock, sync_data, sync_det, sync_pt[31:0], sync_pt_length[5:0 and sync_timeout_th[31:0].

The implementation principle and technical effects of the tire pressure signal processing method provided by the embodiments of the present invention are the same as those of the foregoing method embodiments. For the sake of brief description, for parts not mentioned in this embodiment, please refer to the foregoing method embodiments. Corresponding content.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features can be equivalently replaced; and these modifications or substitutions do not deviate from the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present invention. scope.

Claims (5)

1. A method for processing tire pressure signals, characterized in that the method includes: Determine the running frame data, the first data and the actual baud rate according to the pre-acquired original tire pressure signal and the pre-acquired signal level status data; Determine the baud rate clock according to the actual baud rate; Collect the first data within the time range corresponding to the bit rate clock as second data; Determine the synchronization frame data and the third data according to the preset format configuration rules, the preset length configuration rules and the second data; Use the running frame data, the synchronization frame data, the third data and the actual baud rate as a processed tire pressure signal, and send the processed tire pressure signal to a preset detection circuit; The state of the signal level state data includes a high level width state and a low level width state; The step of determining the running frame data, the first data and the actual baud rate based on the pre-acquired original tire pressure signal and the pre-acquired signal level status data includes: Perform edge detection on the original tire pressure signal; Determine whether the state of the signal level status data is a high level width state; If the edge detection is successful and the state of the signal level status data is a high level width state, extract the running frame data in the original tire pressure signal; Use other data in the original tire pressure signal except the running frame data as the first data; Determine the actual baud rate according to the running frame data; According to the running frame data, the step of determining the actual baud rate includes: Divide the total duration of multiple running frame data by the number of running frame data to obtain the actual baud rate; The method also includes: If the number of times the valid original tire pressure signal is continuously generated reaches a preset number of times, an effective locking signal of the original tire pressure signal is generated, wherein the effective locking signal is an enable signal; The step of collecting the first data within the time range corresponding to the bit rate clock as the second data includes: If the valid lock signal is generated, collect the first data within the time range corresponding to the bit rate clock; Combine a plurality of the first data into the second data; According to the preset format configuration rules, the preset length configuration rules and the second data, the step of determining the synchronization frame data and the third data includes: Match the second data with the preset format configuration rules and the preset length configuration rules to obtain a matching result; If the matching result indicates that the matching is successful, the synchronization frame data and the third data are extracted from the second data, where the third data includes data frame data and verification frame data. 2. The method according to claim 1, characterized in that, the method further comprises: If the edge detection is successful and the state of the signal level status data is a high level width state, then the number of times the valid original tire pressure signal is generated is increased by one; If the number of times that the valid original tire pressure signal is continuously generated reaches a preset number of times, extract a plurality of the running frame data; If the preset number of consecutively generated valid original tire pressure signals does not reach the preset number, the step of extracting multiple running frame data is not performed. 3. The method according to claim 1, characterized in that the step of determining the baud rate clock according to the actual baud rate includes: The baud rate clock is determined according to the actual baud rate or a preset baud rate obtained in advance. 4. The method according to claim 1, characterized in that, the method further comprises: Collect the first tire pressure signal of tire pressure through the tire pressure sensor; Filter the first tire pressure signal to obtain the original tire pressure signal. 5. A tire pressure signal processing device using the tire pressure signal processing method according to claim 1, characterized in that the device includes: The first processing unit is used to determine the running frame data, the first data and the actual baud rate based on the pre-acquired original tire pressure signal and the pre-acquired signal level status data; a second processing unit, configured to determine the baud rate clock according to the actual baud rate; A third processing unit, configured to collect the first data within the time range corresponding to the bit rate clock as second data; A fourth processing unit configured to determine the synchronization frame data and the third data according to the preset format configuration rules, the preset length configuration rules and the second data; An output unit is configured to use the running frame data, the synchronization frame data, the third data and the actual baud rate as a processed tire pressure signal, and send the processed tire pressure signal to a preset Detection circuit set up.