CN114043827A - Tire pressure signal processing method and device - Google Patents
Tire pressure signal processing method and device Download PDFInfo
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- CN114043827A CN114043827A CN202111358498.5A CN202111358498A CN114043827A CN 114043827 A CN114043827 A CN 114043827A CN 202111358498 A CN202111358498 A CN 202111358498A CN 114043827 A CN114043827 A CN 114043827A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
- B60C23/0474—Measurement control, e.g. setting measurement rate or calibrating of sensors; Further processing of measured values, e.g. filtering, compensating or slope monitoring
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Abstract
The invention provides a method and a device for processing tire pressure signals, wherein the method comprises the following steps: determining operation frame data, first data and an actual baud rate according to a pre-acquired original tire pressure signal and pre-acquired signal level state data; determining a baud rate clock according to the actual baud rate; acquiring first data in a time range corresponding to the specific rate clock as second data; determining synchronous frame data and third data according to a preset format configuration rule, a preset length configuration rule and the second data; and taking the running frame data, the synchronous frame data, the third data and the actual baud rate as processed tire pressure signals, and sending the processed tire pressure signals to a preset detection circuit. The method can be used for carrying out validity detection and synchronization matching on the original tire pressure signal, and is beneficial to more accurate tire pressure state detected by a subsequent circuit.
Description
Technical Field
The present invention relates to the field of signal processing technologies, and in particular, to a method and an apparatus for processing a tire pressure signal.
Background
In the running process of the vehicle, the tire pressure of the tire can change constantly, so that the tire pressure signal needs to be monitored in real time to ensure the safe running of the vehicle. At present, the communication formats of tire pressure signals acquired by a sensor of a tire pressure monitoring system are various, so that the tire pressure signals with reference significance cannot be accurately acquired, and the tire pressure signals cannot be effectively processed, so that the tire pressure state of a tire cannot be accurately judged.
Disclosure of Invention
Based on this, the present invention aims to provide a method and an apparatus for processing a tire pressure signal, so as to perform validity detection and synchronization matching on an original tire pressure signal, and facilitate a subsequent circuit to detect a more accurate tire pressure state.
In a first aspect, the present invention provides a method for processing a tire pressure signal, the method comprising: determining operation frame data, first data and an actual baud rate according to a pre-acquired original tire pressure signal and pre-acquired signal level state data; determining a baud rate clock according to the actual baud rate; acquiring first data in a time range corresponding to the specific rate clock as second data; determining synchronous frame data and third data according to a preset format configuration rule, a preset length configuration rule and the second data; and taking the running frame data, the synchronous frame data, the third data and the actual baud rate as processed tire pressure signals, and sending the processed tire pressure signals to a preset detection circuit.
In an alternative embodiment, the states of the signal level state data include a high level width state and a low level width state; the method comprises the following steps of determining running frame data, first data and an actual baud rate according to a pre-acquired original tire pressure signal and pre-acquired signal level state data, wherein the steps comprise: performing marginality detection on the original tire pressure signal; judging whether the state of the signal level state data is a high level width state or not; if the marginality detection is successful and the state of the signal level state data is a high level width state, extracting running frame data in the original tire pressure signal; taking other data except the operation frame data in the original tire pressure signal as first data; and determining the actual baud rate according to the running frame data.
In an alternative embodiment, the method further comprises: if the marginality detection is successful and the state of the signal level state data is a high level width state, adding one to the number of times of generating an effective original tire pressure signal; if the frequency of continuously generating effective original tire pressure signals reaches a preset frequency, extracting a plurality of operation frame data; and if the effective original tire pressure signals continuously generated for the preset times do not reach the preset times, the step of extracting the plurality of operation frame data is not executed.
In an alternative embodiment, the step of determining the actual baud rate according to the running frame data includes: and dividing the total duration of the plurality of running frame data by the number of the running frame data to obtain the actual baud rate.
In an alternative embodiment, the method further comprises: and if the frequency of continuously generating the effective original tire pressure signal reaches a preset frequency, generating an effective locking signal of the original tire pressure signal, wherein the effective locking signal is an enabling signal.
In an optional embodiment, the step of acquiring first data in a time range corresponding to the bit rate clock as second data includes: if an effective locking signal is generated, acquiring first data in a time range corresponding to the specific rate clock; the plurality of first data are combined into second data.
In an optional embodiment, the step of determining the synchronized frame data and the third data according to a preset format configuration rule, a preset length configuration rule, and the second data includes: matching the second data with a preset format configuration rule and a preset length configuration rule to obtain a matching result; and if the matching result represents that the matching is successful, extracting synchronous frame data and third data from the second data, wherein the third data comprises data frame data and verification frame data.
In an alternative embodiment, the step of determining the baud rate clock according to the actual baud rate comprises: and determining a baud rate clock according to the actual baud rate or a preset baud rate acquired in advance.
In an alternative embodiment, the method further comprises: collecting a first tire pressure signal of a tire pressure through a tire pressure sensor; and 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 apparatus, the apparatus comprising: the first processing unit is used for determining running frame data, first data and actual baud rate according to a pre-acquired original tire pressure signal and pre-acquired signal level state data; the second processing unit is used for determining a baud rate clock according to the actual baud rate; the third processing unit is used for acquiring first data in a time range corresponding to the specific rate clock as second data; the fourth processing unit is used for determining synchronous frame data and third data according to a preset format configuration rule, a preset length configuration rule and the second data; and the output unit is used for taking the running frame data, the synchronous frame data, the third data and the actual baud rate as processed tire pressure signals and sending the processed tire pressure signals to a preset detection circuit.
The invention has the following beneficial effects:
the invention provides a method and a device for processing tire pressure signals, wherein the method comprises the following steps: determining operation frame data, first data and an actual baud rate according to a pre-acquired original tire pressure signal and pre-acquired signal level state data; determining a baud rate clock according to the actual baud rate; acquiring first data in a time range corresponding to the specific rate clock as second data; determining synchronous frame data and third data according to a preset format configuration rule, a preset length configuration rule and the second data; and taking the running frame data, the synchronous frame data, the third data and the actual baud rate as processed tire pressure signals, and sending the processed tire pressure signals to a preset detection circuit. The method can be used for carrying out validity detection and synchronization matching on the original tire pressure signal, and is beneficial to more accurate tire pressure state detected by a subsequent circuit.
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 as set forth above.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of a method for processing a tire pressure signal according to an embodiment of the present invention;
fig. 2 is a flowchart of a second tire pressure signal processing method according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating an example frame format according to an embodiment of the present invention;
fig. 4 is a schematic view of a tire pressure signal processing device according to an embodiment of the present invention;
fig. 5 is a schematic view of a tire pressure signal processing system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, 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 with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
At present, signal communication formats of sensors adopted by a tire pressure monitoring system are various, signals among different products are generally transmitted by adopting standard Manchester coding, differential Manchester coding and reverse Manchester coding formats, but the methods cannot synchronize all signals and also cannot perform validity test and classification on the signals, so that the design of a frame synchronization detection method for Manchester coding and extension code format signals with low cost and high performance becomes an urgent technical problem to be solved. Based on the method and the device, the invention provides a method and a device for processing the tire pressure signal, and the scheme is applied to the scene of tire pressure detection.
Example one
An embodiment of the present invention provides a method for processing a tire pressure signal, as shown in fig. 1, the method includes:
step S102, determining operation frame data, first data and actual baud rate according to the pre-acquired original tire pressure signal and the pre-acquired signal level state 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. And this step will also generate a valid lock signal for the original tire pressure signal, which is an enable signal for the subsequent frame synchronization module.
And step S104, determining a baud rate clock according to the actual baud rate.
In particular, this step is performed by a baud rate clock module in order to generate the baud rate clock for subsequent use.
And step S106, collecting first data in a time range corresponding to the specific rate clock as second data.
And step S108, determining synchronous frame data and third data according to a preset format configuration rule, a preset length configuration rule and the second data.
Step S110, using the running frame data, the synchronous frame data, the third data and the actual baud rate as processed tire pressure signals, and sending the processed tire pressure signals to a preset detection circuit.
Specifically, steps S106 to S110 are performed by a frame synchronization module, and the main purpose is to perform frame synchronization processing on the signal.
The invention provides a method for processing a tire pressure signal, which comprises the following steps: determining operation frame data, first data and an actual baud rate according to a pre-acquired original tire pressure signal and pre-acquired signal level state data; determining a baud rate clock according to the actual baud rate; acquiring first data in a time range corresponding to the specific rate clock as second data; determining synchronous frame data and third data according to a preset format configuration rule, a preset length configuration rule and the second data; and taking the running frame data, the synchronous frame data, the third data and the actual baud rate as processed tire pressure signals, and sending the processed tire pressure signals to a preset detection circuit. The method can be used for carrying out validity detection and synchronization matching on the original tire pressure signal, and is beneficial to more accurate tire pressure state detected by a subsequent circuit.
Example two
An embodiment of the present invention provides a second method for processing a tire pressure signal, as shown in fig. 2, the method includes:
step S202, collecting a first tire pressure signal of the tire pressure through a tire pressure sensor; and filtering the first tire pressure signal to obtain an original tire pressure signal.
Specifically, firstly, a sensor is preset at a tire, and the tire pressure sensor collects a first tire pressure signal (also called rx _ data or a first baseband signal) of the tire pressure and transmits the first tire pressure signal to the validity detection module; then, the validity detection module carries out filtering processing on the first tire pressure signal to obtain an original tire pressure signal. In addition, the validity detection module only works after receiving an enabling signal (namely dbr _ en) provided by a user, and after the validity detection module starts to work, the validity detection module is in a high level state.
And step S204, performing marginality detection on the original tire pressure signal.
Specifically, this step is performed by the validity detection module. The validity detection module continuously detects whether the original tire pressure signal contains edge signals (i.e., edge _ DET signal, edge signal) according to the system clock, if the edge _ DET signal is not detected, the validity detection module state will keep the zero state (i.e., BAUD _ DET _ ST0), if the edge _ DET signal is received (i.e., the edge detection is successful), the validity detection module enters the first state (BAUD _ DET _ ST1), and then detects again, if the edge _ DET signal is received again, step S206 is executed, and if the edge _ DET signal is not received, the BAUD _ DET _ ST1 state is kept unchanged.
In step S206, it is determined whether the state of the signal level state data is a high level width state.
In particular implementations, the states of the signal level state data include a high level width state and a low level width state.
Specifically, the judging step is as follows: the validity detection module compares the manually input detection signal with baud _ div [15:0] (i.e. frequency division coefficient) to obtain an absolute value of error, and if the absolute value of error is within a threshold baud _ th [15:0] (pre-configured baud rate error threshold), a pulse baud _ valid signal (i.e. signal level state data) is generated. The state of the signal level state data can be judged to be a high level width state or a low level width state according to the pulse baud _ valid signal. Note that BAUD _ th [15:0] and BAUD _ div [15:0] are used in combination to configure the CDC module BAUD rate, with a single BAUD _ div configuring the BAUDgenerator BAUD rate.
In step S208, if the marginality detection is successful and the state of the signal level state data is a high level width state, the operation frame data in the original tire pressure signal is extracted.
In specific implementation, if the marginality detection is successful and the state of the signal level state data is a high level width state, adding one to the number of times of generating an effective original tire pressure signal; if the frequency of continuously generating effective original tire pressure signals reaches a preset frequency, extracting a plurality of operation frame data; and if the effective original tire pressure signals continuously generated for the preset times do not reach the preset times, the step of extracting the plurality of operation frame data is not executed.
Specifically, the signal level status data is also called baud _ valid signal, and is used for sampling points of the received signal.
Specifically, when sampling is started again, the system also keeps the sampling edge signal edge _ DET, if the edge _ DET signal does not exist, the state of the BAUD _ DET _ ST1 is kept unchanged, if the edge _ DET signal arrives, the determination of whether the BAUD _ valid signal is at a high level (namely, a high level width state) is started, if the BAUD _ DET signal arrives, the state machine enters the next state BAUD _ DET _ ST2, if the BAUD _ valid signal is at a low level (namely, a low level width state), the detection error is indicated, and the loop returns to the initial state BAUD _ DET _ ST0 to restart the loop; after entering the BAUD _ DET _ ST2 state, the system also keeps the sampling edge signal edge _ DET, if the edge _ DET signal does not exist, the BAUD _ DET _ ST2 state is kept unchanged, if the edge _ DET signal arrives, the judgment of whether the BAUD _ valid signal is high level is started, if the BAUD _ DET signal arrives, the state machine enters the next state BAUD _ DET _ ST3, if the BAUD _ valid signal is low level, the detection error is indicated, and the loop is restarted after returning to the initial state BAUD _ DET _ ST 0; and so on until BAUD _ DET _ ST7 is reached. The number of the cycles can be set according to the user's requirement, for example, the number of the cycles is set to 7, and only when the edge _ det is continuously received 6 times, it indicates that the original tire pressure signal is valid, and the user's requirement is satisfied. At this time, the operation frame data can be extracted from each original tire pressure signal, and the data of the original tire pressure signal other than the operation frame data is called as first data (also called cdc _ data), and the first data is also transmitted to the frame synchronization module for subsequent calling.
In step S210, if the number of times of continuously generating the valid original tire pressure signal reaches a preset number of times, a valid locking signal of the original tire pressure signal is generated, wherein the valid locking signal is an enable signal.
Specifically, if the operation frame data can be extracted from each of the original tire pressure signals, the validity detection module can determine that the original tire pressure signals are valid, and a valid locking signal (also called lock) of the original tire pressure signals is generated at the same time. The validity detection module (also called CDR module) inputs a valid lock signal to a subsequent frame synchronization module (also called SYNC module), where the valid lock signal is equivalent to a trigger signal or an enable signal of the frame synchronization module.
Step S212, dividing the total duration of the plurality of running frame data by the number of the running frame data to obtain the actual baud rate.
Specifically, a system clock (i.e., clk) is provided in the entire system, and the validity detection module can divide the total duration of the plurality of running frame data by the number of the running frame data to obtain the actual baud rate. The validity detection module sends the actual baud rate (i.e., baud _ auto [15:0]) to the baud rate clock module.
Step S214, determining a baud rate clock according to the actual baud rate or a preset baud rate acquired in advance.
Specifically, this step is performed by a BAUD rate clock module (also known as BAUD _ generator module) that generates a BAUD rate clock (i.e., BAUD _ clk) and sends it to the frame synchronization module.
Specifically, it can be selected whether to use the baud rate configured manually by baud _ div [15:0] or to configure the baud _ auto [15:0] with the actual baud rate detected by the CDR module (i.e., the validity detection module) according to the value of baud _ manul. If the manually input baud _ manul is 1, baud _ div [15:0] is selected (namely, the manually configured baud rate is selected), and if the manually input baud _ manul is 0, baud _ auto [15:0] is selected (namely, the actual baud rate calculated by the CDR module is selected). In this step, the actual baud rate or the manually configured baud rate can be selected according to the user requirement, and the prior art can generally perform subsequent calculation only by the manually configured baud rate, but the manually configured baud rate has a large error and is far less accurate than the actual baud rate calculated by the validity detection module.
Step S216, if an effective locking signal is generated, first data in a time range corresponding to the specific rate clock are collected; the plurality of first data are combined into second data.
In particular, this step is performed by the frame synchronization module. When the frame synchronization module receives the effective locking signal, the frame synchronization module starts working and acquires corresponding first data according to the baud rate clock.
Step S218, matching the second data with a preset format configuration rule and a preset length configuration rule to obtain a matching result; and if the matching result represents that the matching is successful, extracting synchronous frame data and third data from the second data.
In a specific implementation, the third data includes data frame data and check frame data.
In particular, this step is performed by the frame synchronization module. The second data is matched with a preset format configuration rule (namely sync _ pt [31:0]), a preset length configuration rule (sync _ pt _ length [5:0]), if the matching is successful, the frame synchronization is regarded as successful, synchronous frame data (namely sync _ data) and third data can be extracted from the second data, meanwhile, a frame synchronization success level signal (namely sync _ det, a synchronous mark signal) can be generated, and meanwhile, the time of all original tire pressure signals can be synchronously configured through sync _ timeout _ th (time synchronization device). Here, the data other than the synchronization frame data in the second data is third data, and the third data generally includes data frame data and check frame data.
Specifically, up to this point, the original tire pressure signal is decomposed into four parts, respectively, running frame DATA (also called RUNING), synchronization frame DATA (also called SYNC), DATA frame DATA (also called DATA), and check frame DATA (also called CRC). The concrete contents of the four parts are as follows: RUNING 6-128 chips, SYNC: 1-32 chips, high-order first-out; DATA 1-256 bit, high bit first-out, AES encryption (optional); CRC: CRC-8(x8+ x2+ x1+ 1). Specifically, as shown in fig. 3, which is a schematic diagram of an example of a frame format, RUNING12 chips; 11110110 chips; DATA: 0101100100100 bits.
Specifically, if the matching is not successful, all the modules are reset and step S202 is executed again.
Step S220, using the running frame data, the synchronous frame data, the third data and the actual baud rate as processed tire pressure signals, and sending the processed tire pressure signals to a preset detection circuit.
The embodiment provides a processing method of a tire pressure signal, which carries out edge detection and validity test on the signal through a validity detection module; time correction is carried out on the signals through a baud rate clock module; the method realizes the resolution of the format of the original data, namely, the original tire pressure signal is divided into four parts and transmitted to a subsequent detection circuit, so that the subsequent detection circuit can more accurately detect the tire pressure.
EXAMPLE III
The present invention provides a tire pressure signal processing apparatus, as shown in fig. 4, the apparatus including:
the first processing unit 41 is configured to determine running frame data, first data, and an actual baud rate according to the pre-acquired original tire pressure signal and the pre-acquired signal level status data.
And the second processing unit 42 is used for determining the baud rate clock according to the actual baud rate.
And the third processing unit 43 is configured to acquire the first data in the time range corresponding to the bit rate clock as the second data.
And a fourth processing unit 44, configured to determine synchronous frame data and third data according to a preset format configuration rule, a preset length configuration rule, and the second data.
And the output unit 45 is configured to use the running frame data, the synchronous frame data, the third data, and the actual baud rate as processed tire pressure signals, and send the processed tire pressure signals to a preset detection circuit.
The tire pressure signal processing device provided by the embodiment of the present invention has the same implementation principle and the same technical effect as the foregoing method embodiments, and for the sake of brief description, no mention is made in the device embodiment, and reference may be made to the corresponding contents in the foregoing method embodiments.
Example four
An embodiment of the present invention provides a tire pressure signal processing system 50, as shown in fig. 5, the system includes three modules: the validity detection module 51, the baud rate clock module 52 and the frame synchronization module 53 are connected in sequence, and the validity detection module 51 is connected with the frame synchronization module 53.
The working flow of the system is as follows:
1. a sensor is provided at the tire.
2. The sensor collects the first fetal pressure signal at the beginning in real time.
3. The first fetal pressure signal is sent to a CDR module, which is operative to detect a valid signal.
And 4, the CDR module carries out filtering processing on the initial tire pressure signal to obtain a filtered tire pressure signal, namely the original tire pressure signal. (the CDR module receives the user input enable signal dbr _ en and starts the subsequent operation).
5. The width of the level is confirmed, and the confirmation result is obtained according to data input by a user. The specific method comprises the following steps: according to baud _ div and baud _ th, calculating to obtain a corresponding pulse signal: baud _ valid, based on the pulse signal: baud _ valid determines the level state.
The CDR module may also determine whether the filtered tire pressure signal is a valid tire pressure signal. The judging method comprises the following steps: performing marginality detection on the filtered tire pressure signal, if the marginality detection is successful (namely, detecting that an edge _ DET signal exists, namely, a pulse exists, the state machine enters a BAUD _ DET _ ST1 state), when the sampling is started again, similarly maintaining the sampling edge signal edge _ DET, if the edge _ DET signal does not exist, maintaining the BAUD _ DET _ ST1 state, if the edge _ DET signal arrives, starting to judge whether the BAUD _ valid signal is in a high level, if the edge _ DET signal arrives, starting to judge whether the BAUD _ valid signal is in the high level, entering a next state BAUD _ DET 2 by the state machine, if the BAUD _ valid signal is in the low level, indicating that the detection is faulty, returning to an initial state BADET _ ST0 to restart the cycle, entering a BAUD _ DET _ ST2 state, similarly maintaining the sampling edge signal edge _ DET, if the BAUD _ DET _ signal arrives, maintaining the BAUD _ DET _ ST2 state and judging whether the BAUD _ DET _ valid signal arrives or not, if it is high, the state machine enters the next state BAUD _ DET _ ST3, if BAUD _ valid is low, it indicates detection error, and returns to the initial state BAUD _ DET _ ST0 to start the cycle over. And so on, until reaching BAUD _ DET _ ST7, the state machine will keep this state, which indicates that the RUNING reception is over, the RUNING signal of more than 6 chips has been received, and the valid signal flag lock (which is equivalent to the enable signal of the SYNC block) can be obtained as the trigger signal of the SYNC block. Naturally, the filtered tire pressure signal can be decomposed into four parts: RUNING, and other parts (i.e., first data).
7. And calculating the actual BAUD rate, and inputting the actual BAUD rate into the BAUD _ generator module. (the CDR module, BAUD _ generator module and SYNC module are all provided with a device of system clock).
The actual baud rate is determined as the total duration of multiple RUNINGs divided by the number of times.
The BAUD _ generator module can receive the actual BAUD rate and can also receive the BAUD rate manually input, and a user can select the BAUD rate input by the user and can also select the actual BAUD rate as a BAUD rate clock BAUD _ clk to be output to the SYNC module. (baud _ manul selects the baud rate input by the user when the baud _ manul is 1, and selects the actual baud rate when the baud _ manul is 0). The actual baud rate is typically chosen and this data is more accurate.
The SYNC module receives the baud rate clock baud _ clk and the enable signal (valid flag lock) and cdc _ data (i.e., first data).
10. And acquiring the cdc _ data according to the baud rate clock baud _ clk to obtain the target cdc _ data (namely, second data).
The SYNC data in the target cdc _ data is matched with the format of SYNC _ pt [31:0] and the length of SYNC _ pt _ length [5:0], if the match is positive, the frame synchronization is considered to be successful, and a synchronization mark signal SYNC _ det is generated. In this way, the sync _ DATA can be extracted from the second DATA, and the DATA other than the sync _ DATA in the second DATA is third DATA, which generally includes DATA and CRC. Sync _ det can also be generated from sync _ data.
Otherwise, the above calculations are invalidated and the whole process is restarted.
11. And sending the sync _ det, the sync _ DATA, the RUNING, the DATA, the CRC and the actual baud rate to a subsequent circuit as processed tire pressure signal DATA.
The tire pressure signal processing system provided by the embodiment of the present invention has the same implementation principle and the same technical effect as the foregoing method embodiments, and for brief description, no part of the present embodiment is mentioned, and reference may be made to the corresponding contents in the foregoing method embodiments.
EXAMPLE five
An embodiment of the present invention provides a third method for processing a tire pressure signal, where the method includes:
data rx _ data received by the sensor firstly enters a CDR module, signal baud rate detection is carried out according to a configured baud rate error threshold value baud _ th [15:0] and a frequency division coefficient baud _ div [15:0], when a matched baud rate is detected, a lock signal is output, the high level is effective, and the data cdc _ data is transmitted to a SYNC module.
Meanwhile, the detected actual BAUD rate of the signal is transmitted to the BAUD _ generator module through the BAUD _ auto [15:0], and after the BAUD _ generator module divides the frequency of the clock, BAUD _ clk is generated and sent to the SYNC module.
The SYNC module configures a synchronous format through a synchronous mode SYNC _ pt [31:0] and a synchronous mode length SYNC _ pt _ length [5:0], samples cdc _ data by using baud _ clk after receiving a high-level lock signal, generates a synchronous flag signal SYNC _ det after detecting a signal matched with the synchronous mode, is high-level valid, and transmits the data to a subsequent circuit through the SYNC _ data.
The CDR module is used for detecting 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, which has a lower port: baud _ manul, baud _ auto [15:0] and baud _ div [15:0 ].
The SYNC module is used for frame synchronization, and has a lower port: 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 the generated technical effect of the tire pressure signal processing method provided by the embodiment of the present invention are the same as those of the foregoing method embodiments, and for brief description, no part of the present embodiment is mentioned, and reference may be made to the corresponding contents in the foregoing method embodiments.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A method of processing a tire pressure signal, the method comprising:
determining operation frame data, first data and an actual baud rate according to a pre-acquired original tire pressure signal and pre-acquired signal level state data;
determining a baud rate clock according to the actual baud rate;
acquiring the first data in a time range corresponding to the specific rate clock as second data;
determining synchronous frame data and third data according to a preset format configuration rule, a preset length configuration rule and the second data;
and taking the running frame data, the synchronous frame data, the third data and the actual baud rate as processed tire pressure signals, and sending the processed tire pressure signals to a preset detection circuit.
2. The method of claim 1, wherein the states of the signal level state data include a high level width state and a low level width state;
the step of determining the operation 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 state data comprises the following steps:
performing marginality detection on the original tire pressure signal;
judging whether the state of the signal level state data is a high level width state or not;
if the marginality detection is successful and the state of the signal level state data is a high level width state, extracting operation frame data in the original tire pressure signal;
taking other data except the operation frame data in the original tire pressure signal as the first data;
and determining the actual baud rate according to the running frame data.
3. The method of claim 2, further comprising:
if the marginality detection is successful and the state of the signal level state data is a high level width state, adding one to the number of times of generating the effective original tire pressure signal;
if the frequency of continuously generating the effective original tire pressure signals reaches a preset frequency, extracting a plurality of running frame data;
and if the effective original tire pressure signals continuously generated for the preset times do not reach the preset times, not executing the step of extracting the plurality of running frame data.
4. The method of claim 3, wherein the step of determining said actual baud rate based on said running frame data comprises:
and dividing the total duration of the plurality of running frame data by the number of the running frame data to obtain the actual baud rate.
5. The method of claim 3, further comprising:
and if the frequency of continuously generating the effective original tire pressure signal reaches a preset frequency, generating an effective locking signal of the original tire pressure signal, wherein the effective locking signal is an enabling signal.
6. The method of claim 5, wherein the step of collecting the first data as second data in a time range corresponding to the bit rate clock comprises:
if the effective locking signal is generated, acquiring the first data in a time range corresponding to the specific rate clock;
combining a plurality of the first data into the second data.
7. The method of claim 6, wherein the step of determining the synchronous frame data and the third data according to a preset format configuration rule, a preset length configuration rule and the second data comprises:
matching the second data with the preset format configuration rule and the preset length configuration rule to obtain a matching result;
and if the matching result represents that the matching is successful, extracting the synchronous frame data and the third data from the second data, wherein the third data comprises data frame data and check frame data.
8. The method of claim 1, wherein said step of determining a baud rate clock based on said actual baud rate comprises:
and determining the baud rate clock according to the actual baud rate or a preset baud rate acquired in advance.
9. The method of claim 1, further comprising:
collecting a first tire pressure signal of a tire pressure through a tire pressure sensor;
and filtering the first tire pressure signal to obtain the original tire pressure signal.
10. A tire pressure signal processing apparatus, the apparatus comprising:
the first processing unit is used for determining running frame data, first data and actual baud rate according to a pre-acquired original tire pressure signal and pre-acquired signal level state data;
the second processing unit is used for determining a baud rate clock according to the actual baud rate;
the third processing unit is used for acquiring the first data in a time range corresponding to the specific rate clock as second data;
the fourth processing unit is used for determining synchronous frame data and third data according to a preset format configuration rule, a preset length configuration rule and the second data;
and the output unit is used for taking the running frame data, the synchronous frame data, the third data and the actual baud rate as processed tire pressure signals and sending the processed tire pressure signals to a preset detection circuit.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990047331A (en) * | 1997-12-03 | 1999-07-05 | 정선종 | Frequency hopping synchronization device and synchronization signal detection method and device in asynchronous serial data communication |
| US20060279411A1 (en) * | 2005-06-14 | 2006-12-14 | Siemens Vdo Automotive Corporation | Signal recognition for combined receiver for remote keyless entry and tire pressure monitoring systems |
| CN105946472A (en) * | 2016-05-14 | 2016-09-21 | 北京电子科技职业学院 | Automobile tyre pressure monitoring system |
| CN108891210A (en) * | 2018-06-28 | 2018-11-27 | 深圳市道通科技股份有限公司 | Recognition methods, device and the equipment of tyre pressure sensor |
| CN109397999A (en) * | 2018-12-21 | 2019-03-01 | 李艳华 | A kind of tire pressure monitoring control method of compatible RKE function |
| WO2019114758A1 (en) * | 2017-12-13 | 2019-06-20 | 深圳市道通科技股份有限公司 | Tire pressure sensor activation method and device, storage medium and front-end processor |
| CN111817703A (en) * | 2020-06-03 | 2020-10-23 | 南京英锐创电子科技有限公司 | Detection circuit for specific coded signal |
| CN112455167A (en) * | 2020-12-08 | 2021-03-09 | 安徽江淮汽车集团股份有限公司 | Tire pressure sensor ID acquisition method, tire pressure sensor ID acquisition device and computer-readable storage medium |
-
2021
- 2021-11-16 CN CN202111358498.5A patent/CN114043827B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990047331A (en) * | 1997-12-03 | 1999-07-05 | 정선종 | Frequency hopping synchronization device and synchronization signal detection method and device in asynchronous serial data communication |
| US20060279411A1 (en) * | 2005-06-14 | 2006-12-14 | Siemens Vdo Automotive Corporation | Signal recognition for combined receiver for remote keyless entry and tire pressure monitoring systems |
| CN105946472A (en) * | 2016-05-14 | 2016-09-21 | 北京电子科技职业学院 | Automobile tyre pressure monitoring system |
| WO2019114758A1 (en) * | 2017-12-13 | 2019-06-20 | 深圳市道通科技股份有限公司 | Tire pressure sensor activation method and device, storage medium and front-end processor |
| CN108891210A (en) * | 2018-06-28 | 2018-11-27 | 深圳市道通科技股份有限公司 | Recognition methods, device and the equipment of tyre pressure sensor |
| WO2020001248A1 (en) * | 2018-06-28 | 2020-01-02 | 深圳市道通科技股份有限公司 | Method, apparatus, and device for identifying tire pressure sensor |
| CN109397999A (en) * | 2018-12-21 | 2019-03-01 | 李艳华 | A kind of tire pressure monitoring control method of compatible RKE function |
| CN111817703A (en) * | 2020-06-03 | 2020-10-23 | 南京英锐创电子科技有限公司 | Detection circuit for specific coded signal |
| CN112455167A (en) * | 2020-12-08 | 2021-03-09 | 安徽江淮汽车集团股份有限公司 | Tire pressure sensor ID acquisition method, tire pressure sensor ID acquisition device and computer-readable storage medium |
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|---|---|
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