Peristaltic Start Noise Monitoring Device and Method

Abstract

The present application discloses a creep start noise monitoring device and method. Among them, the creep start noise monitoring device includes: a vibration acceleration sensor, a wheel cylinder pressure sensor, a pickup, and an in-vehicle T-BOX. The vibration acceleration sensor is used to collect the current vibration acceleration signal of the vehicle; the wheel cylinder pressure sensor is used to collect the current wheel cylinder pressure signal of the vehicle; the pickup is used to collect the in-vehicle noise signal; the in-vehicle T-BOX is used to obtain the vehicle speed signal, brake pedal signal, vibration acceleration signal, wheel cylinder pressure signal, and in-vehicle noise signal, and determine whether the in-vehicle noise signal is a creep start noise according to the vehicle speed signal, brake pedal signal, vibration acceleration signal, wheel cylinder pressure signal, and in-vehicle noise signal. The present application can accurately identify the creep start noise.

Description

Technical Field

[0001] This application relates to the technical field of vehicles, and particularly to a creep start noise monitoring device and method. Background Art

[0002] In recent years, with the gradual increase in market requirements for commodity and comfort, braking noise, as a common market complaint point in the JD Power market IQS (Initial Quality Study) report, has been attracting increasing attention at both the development and market ends. Among them, creep start noise during braking is one of the main research and development projects in braking noise. To correctly identify such noise and address the issue of braking whistle noise in braking noise, there are currently relevant monitoring devices and technologies, such as the Link 4000Vmax and the Hona MT6 device systems. Such devices can identify and record braking whistles through in-vehicle vibration acceleration sensors and microphones using algorithms for supervision.

[0003] However, none of the above devices can intelligently identify creep start noise and distinguish it from other noises. Human recording and evaluation are required to obtain creep start noise. The main bottleneck of related technologies lies in the lack of effective technologies to define and identify creep start noise and distinguish it from other noises. In addition, the above devices can only be applied in vehicle tests and cannot be used on commercially available production vehicles, so the market noise performance cannot be monitored.

[0004] Therefore, it is necessary to establish a device and method for monitoring creep start noise, which is highly practical and can accurately identify creep start noise.

[0005] The foregoing description is provided to give a general background information and does not necessarily constitute prior art. Summary of the Invention

[0006] The purpose of this application is to provide a creep start noise monitoring device and method that can accurately identify creep start noise.

[0007] To achieve the above objective, the technical solution of this application is realized as follows:

[0008] In a first aspect, an embodiment of this application provides a creep start noise monitoring device, including: a vibration acceleration sensor, a wheel cylinder pressure sensor, a pickup, and an in-vehicle T-BOX. The vibration acceleration sensor is used to collect the current vibration acceleration signal of the vehicle; the wheel cylinder pressure sensor is used to collect the current wheel cylinder pressure signal of the vehicle; the pickup is used to collect the in-vehicle noise signal; the in-vehicle T-BOX is used to obtain the vehicle speed signal, the brake pedal signal, the vibration acceleration signal, the wheel cylinder pressure signal, and the in-vehicle noise signal, and determine whether the in-vehicle noise signal is creep start noise according to the vehicle speed signal, the brake pedal signal, the vibration acceleration signal, the wheel cylinder pressure signal, and the in-vehicle noise signal.

[0009] As one of the implementation manners, the vibration acceleration sensor is installed on the brake caliper and connected to the vehicle-mounted T-BOX through an anti-noise cable. The vibration acceleration signal includes the vibration acceleration frequency. The wheel cylinder pressure sensor is installed on the brake caliper and connected to the vehicle-mounted T-BOX through an anti-noise cable.

[0010] As one of the implementation manners, the pickup is installed at the position of the driver's seat headrest and connected to the vehicle-mounted T-BOX through an anti-noise cable.

[0011] As one of the implementation manners, the vehicle-mounted T-BOX is further configured to obtain that when the in-vehicle noise frequency matches the vibration acceleration frequency according to the in-vehicle noise signal and the vibration acceleration signal, and jointly determine whether the in-vehicle noise signal is a creep start noise according to the vehicle speed signal, the brake pedal signal, the vibration acceleration signal, the wheel cylinder pressure signal, and the in-vehicle noise signal, and record the noise information.

[0012] As one of the implementation manners, the vehicle-mounted T-BOX is further configured to obtain that the vehicle speed is less than or equal to a preset value and the vehicle is moving forward according to the vehicle speed signal within a period of time, obtain that the vibration acceleration frequency is at the first-order frequency of the creep noise according to the vibration acceleration signal, and the root mean square value of the second moment of the vibration acceleration ≥ the calibration value, and obtain that the hydraulic pressure of the brake caliper is between a preset range according to the wheel cylinder pressure signal. When the brake pedal signal is in the braking state, it is determined that the in-vehicle noise signal during this period of time is a creep start noise, and the noise information is recorded.

[0013] As one of the implementation manners, the calculation formula for the root mean square value of the second moment of the vibration acceleration is where Q is the root mean square value of the second moment of the vibration acceleration, Ψ is the vibration acceleration value within a period of time, and t 0 、t 1 are the start time and the end time within a period of time respectively.

[0014] As one of the implementation manners, the preset value is 3 Km / h, the first-order frequency is between 60 - 100 HZ, and the preset range is between 3 - 7 bar.

[0015] In a second aspect, an embodiment of the present application provides a creep start noise monitoring method, including:

[0016] The vibration acceleration sensor collects the current vibration acceleration signal of the vehicle; the wheel cylinder pressure sensor collects the current wheel cylinder pressure signal of the vehicle; the pickup collects the in-vehicle noise signal;

[0017] The in-vehicle T-BOX obtains vehicle speed signals, brake pedal signals, vibration acceleration signals, wheel cylinder pressure signals, and in-vehicle noise signals, and determines whether the in-vehicle noise signal is a creeping start noise based on the vehicle speed signals, brake pedal signals, vibration acceleration signals, wheel cylinder pressure signals, and in-vehicle noise signals.

[0018] The beneficial effects brought by the technical solutions provided in the embodiments of the present application are as follows:

[0019] The creeping start noise monitoring device and method provided in the embodiments of the present application collect the current vibration acceleration signal of the vehicle through a vibration acceleration sensor; collect the current wheel cylinder pressure signal of the vehicle through a wheel cylinder pressure sensor; collect the in-vehicle noise signal through a pickup; the in-vehicle T-BOX obtains vehicle speed signals, brake pedal signals, vibration acceleration signals, wheel cylinder pressure signals, and in-vehicle noise signals, and determines whether the in-vehicle noise signal is a creeping start noise based on the vehicle speed signals, brake pedal signals, vibration acceleration signals, wheel cylinder pressure signals, and in-vehicle noise signals, thereby accurately identifying the creeping start noise, accurately distinguishing the creeping start noise from other noises, and can be applied to mass-produced models for recording and monitoring, and can be applied to the product development stage of the host factory. The main characteristics and occurrence conditions of the creeping start noise can be identified under actual vehicle conditions, and the characteristics of the creeping start noise can be identified during the actual vehicle test project. In addition, it can be applied to the market quality monitoring work of the host factory. By monitoring the occurrence of the creeping start noise in the market, quality improvement measures can be taken in advance for product quality to ensure the stability of the quality of the products sold in the market. In addition, it can also be applied to the quality problem investigation work of the host factory. The performance of the actual noise can be identified, and the cause of the problem can be clarified through big data comparison and analysis, providing a guiding basis for design and development and technical research. Description of the Drawings

[0020] Figure 1 It is a block diagram of the creeping start noise monitoring device provided in the embodiments of the present application;

[0021] Figure 2 It is a flowchart of the creeping start noise monitoring method provided in the embodiments of the present application;

[0022] Figure 3 It is a flowchart of the creeping start noise monitoring method provided in another embodiment of the present application. Detailed Embodiments

[0023] The technical solutions of the present application will be further elaborated in detail below in conjunction with the accompanying drawings of the specification and specific embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the specification of the present application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0024] Figure 1 This is a block diagram of the peristaltic start noise monitoring device provided by the embodiments of the present application. The peristaltic start noise monitoring device can accurately identify the peristaltic start noise. Please refer to Figure 1 , the peristaltic start noise monitoring device of this embodiment includes: a vibration acceleration sensor 10, a wheel cylinder pressure sensor 11, a pickup 12, and an in-vehicle T-BOX (Telematics BOX, remote information processing box) 13.

[0025] Specifically, the vibration acceleration sensor 10 can be installed on the brake caliper and can be connected to the in-vehicle T-BOX 13 through an anti-noise cable 14, and is used to collect the current vibration acceleration signal of the vehicle. The vibration acceleration signal can include the vibration acceleration frequency, etc. The anti-noise cable 14 has the function of anti-interference.

[0026] The wheel cylinder pressure sensor 11 can be installed on the brake caliper and can be connected to the in-vehicle T-BOX 13 through an anti-noise cable 14, and is used to collect the current wheel cylinder pressure signal of the vehicle. The wheel cylinder pressure signal can include the hydraulic pressure of the brake caliper, etc. The wheel cylinder pressure sensor 11 can be integrated in the ESP (Electronic Stability Program) system.

[0027] Among them, the acceleration sensor 10 and the wheel cylinder pressure sensor 11 are used to collect the current working state of the vehicle's brake caliper in real time, for example, including the vibration acceleration data signal or the wheel cylinder pressure signal.

[0028] The pickup 12 can be installed at the position of the driver's seat headrest and can be connected to the in-vehicle T-BOX 13 through an anti-noise cable 14, and is used to collect the in-vehicle noise signal. The noise signal can include the noise frequency, etc.

[0029] The in-vehicle T-BOX 13 is used to obtain the vehicle speed signal, the brake pedal signal, the vibration acceleration signal, the wheel cylinder pressure signal, and the in-vehicle noise signal, and determine whether the in-vehicle noise signal is a peristaltic start noise according to the vehicle speed signal, the brake pedal signal, the vibration acceleration signal, the wheel cylinder pressure signal, and the in-vehicle noise signal.

[0030] Among them, the vehicle speed signal can be collected by devices such as a vehicle speed sensor and an in-vehicle navigation system, and the brake pedal signal can be collected by a brake pedal sensor. The vehicle speed sensor, the in-vehicle navigation system, and the brake pedal sensor can all be connected to the in-vehicle T-BOX 13 and can be connected through the CAN bus or other means (not shown in the figure).

[0031] Furthermore, the in-vehicle T-BOX 13 is also used to obtain when the in-vehicle noise frequency matches the vibration acceleration frequency based on the in-vehicle noise signal and the vibration acceleration signal, and then jointly determine whether the in-vehicle noise signal is a creep start noise based on the vehicle speed signal, the brake pedal signal, the vibration acceleration signal, the wheel cylinder pressure signal, and the in-vehicle noise signal, and record the noise information.

[0032] Among them, the matching of the in-vehicle noise frequency and the vibration acceleration frequency can be, for example, that the vibration acceleration frequency is within a preset frequency range of the in-vehicle noise frequency, such as between 60 - 100 HZ. An identification and analysis software GMS can be set in the in-vehicle T-BOX to determine whether the in-vehicle noise signal is a creep start noise. The noise information can include the noise frequency, etc.

[0033] Here, the working state of the current brake caliper is recorded in real time by the acceleration sensor 10 and the wheel cylinder pressure sensor 11, and the in-vehicle noise signal is collected by the pickup 12. When the in-vehicle T-BOX 13 determines that the noise signal of the pickup 12 is a noise frequency that matches the vibration acceleration frequency, based on the vibration acceleration signal, the wheel cylinder pressure signal, combined with the vehicle speed signal, the brake pedal signal, and the in-vehicle noise signal within a certain time length on the in-vehicle can bus, jointly determine whether the in-vehicle noise signal is a creep start noise through the GMS software built in the in-vehicle T-BOX 13, and record the noise information.

[0034] Furthermore, the in-vehicle T-BOX 13 is also used to obtain the vehicle speed signal within a certain period of time (such as within 1 second), and when the vehicle speed is less than or equal to a preset value (such as less than or equal to 3 Km / h) and the vehicle is moving forward, and the vibration acceleration frequency is within the first-order frequency of the creep noise (usually 60 - 100 HZ) based on the vibration acceleration signal, and the root mean square value of the second moment of the vibration acceleration ≥ the calibration value, and the brake caliper hydraulic pressure is within a preset range based on the wheel cylinder pressure signal, and the brake pedal signal is in the braking state, then it is determined that the in-vehicle noise signal during this period is a creep start noise, and the noise information is recorded.

[0035] Here, the calculation formula for the root mean square value of the second moment of the vibration acceleration is where Q is the root mean square value of the second moment of the vibration acceleration, the calibration value can be set according to actual needs, Ψ is the vibration acceleration value within a certain period of time, t 0 、t 1 are the start time and end time within a certain period of time respectively. The above formula is to identify the modal parameters by sampling the acceleration values within a quantitative time length (0 - t1) of the detected acceleration values, and calculate the energy characteristics within the quantitative time length by integrating the acceleration values within a specific frequency range (Ψ is the acceleration value measured by the acceleration sensor) to identify whether the noise has been excited.

[0036] Here, a period of time can be set to 1 second, the preset value can be 3 Km / h, the first-order frequency can be between 60 - 100 HZ, and the preset range can be between 3 - 7 bar. The in-vehicle T-BOX 13 determines that within one second, the vehicle speed ≤ 3 Km / h, the vehicle speed slope K ≥ 0 (i.e., the vehicle is moving forward), the vibration acceleration is at the first-order frequency of the creeping noise (usually between 60 - 100 HZ), and the root mean square value of the second moment of the vibration acceleration ≥ the calibration value. The hydraulic pressure of the brake caliper is between 3 - 7 bar, and the brake pedal signal is in the braking state (e.g., the state of "On"), then it is determined that the in-vehicle noise signal is the creeping start noise signal, and the noise information is recorded, so as to accurately identify the creeping start noise, without being confused with other noises, and well distinguish the creeping start noise, which can be applied to mass-produced vehicles for recording and monitoring.

[0037] In summary, the creeping start noise monitoring device provided by the embodiment of the present application collects the current vibration acceleration signal of the vehicle through a vibration acceleration sensor; collects the current wheel cylinder pressure signal of the vehicle through a wheel cylinder pressure sensor; collects the in-vehicle noise signal through a pickup; the in-vehicle T-BOX obtains the vehicle speed signal, the brake pedal signal, the vibration acceleration signal, the wheel cylinder pressure signal, and the in-vehicle noise signal, and determines whether the in-vehicle noise signal is the creeping start noise according to the vehicle speed signal, the brake pedal signal, the vibration acceleration signal, the wheel cylinder pressure signal, and the in-vehicle noise signal, thereby accurately identifying the creeping start noise, accurately distinguishing the creeping start noise from other noises, which can be applied to mass-produced vehicles for recording and monitoring, and can be applied to the product development stage of the vehicle manufacturer. It can identify the main characteristics and occurrence conditions of the creeping start noise under actual vehicle conditions, and identify the characteristics of the creeping start noise in the actual vehicle test project. In addition, it can be applied to the market quality monitoring work of the vehicle manufacturer. By monitoring the occurrence of the creeping start noise in the market, quality improvement measures can be taken in advance to ensure the stable quality of the products sold in the market. In addition, it can also be applied to the quality problem investigation work of the vehicle manufacturer. It can identify the performance of the actual noise. Through big data comparison and analysis, the cause of the problem can be clarified, providing a guiding basis for design and development and technical research.

[0038] The following is the method embodiment of the present application. For details not described in detail in the method embodiment, reference can be made to the corresponding device embodiment above.

[0039] Figure 2 It is a schematic flow chart of the creeping start noise monitoring method provided by the embodiment of the present application. Please refer to Figure 2 This creeping start noise monitoring method is applied to a creeping start noise monitoring device. The creeping start noise monitoring device can be implemented in software and / or hardware. The creeping start noise monitoring method includes the following steps:

[0040] Step S201, the vibration acceleration sensor collects the current vibration acceleration signal of the vehicle; the wheel cylinder pressure sensor collects the current wheel cylinder pressure signal of the vehicle; the pickup collects the in-vehicle noise signal.

[0041] Step S203, the in-vehicle T-BOX obtains the vehicle speed signal, the brake pedal signal, the vibration acceleration signal, the wheel cylinder pressure signal, and the in-vehicle noise signal, and determines whether the in-vehicle noise signal is a creeping start noise according to the vehicle speed signal, the brake pedal signal, the vibration acceleration signal, the wheel cylinder pressure signal, and the in-vehicle noise signal.

[0042] As one implementation manner, the vibration acceleration sensor is installed on the brake caliper and is connected to the in-vehicle T-BOX through an anti-noise cable. The vibration acceleration signal includes the vibration acceleration frequency. The wheel cylinder pressure sensor is installed on the brake caliper and is connected to the in-vehicle T-BOX through an anti-noise cable.

[0043] As one implementation manner, the pickup is installed at the position of the driver's seat headrest and is connected to the in-vehicle T-BOX through an anti-noise cable.

[0044] As one implementation manner, in step S202, the in-vehicle T-BOX determines whether the in-vehicle noise signal is a creeping start noise according to the vehicle speed signal, the brake pedal signal, the vibration acceleration signal, the wheel cylinder pressure signal, and the in-vehicle noise signal, specifically including: when the in-vehicle T-BOX obtains that the in-vehicle noise frequency matches the vibration acceleration frequency according to the in-vehicle noise signal and the vibration acceleration signal, it jointly determines whether the in-vehicle noise signal is a creeping start noise according to the vehicle speed signal, the brake pedal signal, the vibration acceleration signal, the wheel cylinder pressure signal, and the in-vehicle noise signal, and records the noise information.

[0045] As Figure 3 shown, preferably, in step S202, the in-vehicle T-BOX determines whether the in-vehicle noise signal is a creeping start noise according to the vehicle speed signal, the brake pedal signal, the vibration acceleration signal, the wheel cylinder pressure signal, and the in-vehicle noise signal, which can be specifically refined into step S301: the in-vehicle T-BOX obtains according to the vehicle speed signal within a period of time that the vehicle speed is less than or equal to the preset value and the vehicle is moving forward. According to the vibration acceleration signal, the vibration acceleration frequency is at the first-order frequency of the creeping noise, and the root mean square value of the second moment of the vibration acceleration ≥ the calibration value. According to the wheel cylinder pressure signal, the hydraulic pressure of the brake caliper is within the preset range, and when the brake pedal signal is in the braking state, it is determined that the in-vehicle noise signal within this period of time is a creeping start noise, and the noise information is recorded.

[0046] As one implementation manner, the calculation formula for the root mean square value of the second moment of the vibration acceleration is Where Q is the root mean square value of the vibration acceleration, Ψ is the vibration acceleration value within a period of time, and t 0 , t 1 are the start time and end time within a period of time respectively.

[0047] As one of the implementation manners, the preset value is 3 Km / h, the first-order frequency is between 60 - 100 HZ, and the preset range is between 3 - 7 bar.

[0048] In summary, for the peristaltic start noise monitoring method provided by the embodiments of the present application, the vehicle's current vibration acceleration signal is collected by a vibration acceleration sensor; the vehicle's current wheel cylinder pressure signal is collected by a wheel cylinder pressure sensor; the in-vehicle noise signal is collected by a pickup; the vehicle-mounted T-BOX obtains the vehicle speed signal, the brake pedal signal, the vibration acceleration signal, the wheel cylinder pressure signal, and the in-vehicle noise signal, and determines whether the in-vehicle noise signal is a peristaltic start noise according to the vehicle speed signal, the brake pedal signal, the vibration acceleration signal, the wheel cylinder pressure signal, and the in-vehicle noise signal, thereby accurately identifying the peristaltic start noise, accurately distinguishing the peristaltic start noise from other noises, and it can be applied to mass-produced vehicle models for recording and monitoring, and can also be applied to the product development stage of the vehicle manufacturer. It can identify the main characteristics and occurrence conditions of the peristaltic start noise under actual vehicle conditions, and identify the characteristics of the peristaltic start noise during the actual vehicle test project. In addition, it can be applied to the vehicle manufacturer's market quality monitoring work. By monitoring the occurrence of the peristaltic start noise in the market, quality improvement measures can be taken in advance for product quality to ensure the stable quality of the products sold in the market. Furthermore, it can also be applied to the vehicle manufacturer's quality problem investigation work. It can identify the performance of the actual noise. Through big data comparison and analysis, the cause of the problem can be clarified, providing a guiding basis for design and development and technical research.

[0049] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0050] It should be noted that in this text, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or device comprising such element. In addition, components, features, and elements with the same name in different embodiments of this application may have the same meaning or different meanings, and their specific meanings need to be determined based on their explanations in the specific embodiment or further in combination with the context of the specific embodiment.

[0051] It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this text, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining". Furthermore, as used herein, the singular forms "a", "an" and "the" are also intended to include the plural forms unless the context indicates otherwise. It should be further understood that the terms "comprise", "include" indicate the presence of the stated features, steps, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or meaning any one or any combination. Thus, "A, B or C" or "A, B and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A, B and C". An exception to this definition occurs only when the combination of elements, functions, steps or operations are mutually exclusive in some way.

[0052] It should be understood that although the steps in the flowchart in the embodiments of the present application are displayed in sequence according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps has no strict order limit, and they can be executed in other orders. Moreover, at least a part of the steps in the figure may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed alternately or alternately with at least a part of other steps or sub-steps or stages of other steps.

[0053] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A peristaltic start noise monitoring device, characterized in that, it includes: a vibration acceleration sensor, a wheel cylinder pressure sensor, a pickup, and an in-vehicle T-BOX, where the vibration acceleration sensor is used to collect the current vibration acceleration signal of the vehicle; the wheel cylinder pressure sensor is used to collect the current wheel cylinder pressure signal of the vehicle; the pickup is used to collect the in-vehicle noise signal; the in-vehicle T-BOX is used to obtain the vehicle speed signal, brake pedal signal, vibration acceleration signal, wheel cylinder pressure signal, in-vehicle noise signal, and determine whether the in-vehicle noise signal is a peristaltic start noise according to the vehicle speed signal, brake pedal signal, vibration acceleration signal, wheel cylinder pressure signal, in-vehicle noise signal; The in-vehicle T-BOX is further configured to obtain, according to the vehicle speed signal within a period of time, that the vehicle speed is less than or equal to a preset value and the vehicle is moving forward, obtain, according to the vibration acceleration signal, that the vibration acceleration frequency is at the first-order frequency of the creeping noise, and the root mean square value of the second moment of the vibration acceleration is a calibrated value, obtain, according to the wheel cylinder pressure signal, that the hydraulic pressure of the brake caliper is within a preset range, and when the brake pedal signal is in the braking state, it is determined that the in-vehicle noise signal during this period is the creeping start noise, and the noise information is recorded.

2. The device according to claim 1, characterized in that, the vibration acceleration sensor is installed on the brake caliper and connected to the in-vehicle T-BOX through an anti-noise cable. The vibration acceleration signal includes the vibration acceleration frequency. The wheel cylinder pressure sensor is installed on the brake caliper and connected to the in-vehicle T-BOX through an anti-noise cable.

3. The device according to claim 1, characterized in that, the pickup is installed at the position of the driver's seat headrest and connected to the in-vehicle T-BOX through an anti-noise cable.

4. The device according to claim 1, characterized in that, the in-vehicle T-BOX is further used to obtain the in-vehicle noise frequency and vibration acceleration frequency when they match according to the in-vehicle noise signal and vibration acceleration signal, and jointly determine whether the in-vehicle noise signal is a peristaltic start noise according to the vehicle speed signal, brake pedal signal, vibration acceleration signal, wheel cylinder pressure signal, in-vehicle noise signal, and record the noise information.

5. The device according to claim 1, characterized in that, The calculation formula for the root mean square value of the second moment of the vibration acceleration is , where Q is the root mean square value of the second moment of the vibration acceleration, Ψ is the vibration acceleration value within a period of time, and t 0 , t 1 are the starting time and the ending time within a period of time respectively.

6. The device according to claim 1, characterized in that, The preset value is 3 Km / h, the first-order frequency is between 60 - 100 HZ, and the preset range is between 3 - 7 bar.

7. A peristaltic start noise monitoring method, characterized in that, it includes: the vibration acceleration sensor collects the current vibration acceleration signal of the vehicle; the wheel cylinder pressure sensor collects the current wheel cylinder pressure signal of the vehicle; the pickup collects the in-vehicle noise signal; the in-vehicle T-BOX obtains the vehicle speed signal, brake pedal signal, vibration acceleration signal, wheel cylinder pressure signal, in-vehicle noise signal, and determines whether the in-vehicle noise signal is a peristaltic start noise according to the vehicle speed signal, brake pedal signal, vibration acceleration signal, wheel cylinder pressure signal, in-vehicle noise signal; wherein, the in-vehicle T-BOX determines whether the in-vehicle noise signal is a peristaltic start noise according to the vehicle speed signal, brake pedal signal, vibration acceleration signal, wheel cylinder pressure signal, in-vehicle noise signal, specifically including: The in-vehicle T-BOX obtains that the vehicle speed is less than or equal to the preset value and the vehicle is moving forward according to the vehicle speed signal within a period of time, obtains that the vibration acceleration frequency is at the first-order frequency of the creeping noise and the root mean square value of the second moment of the vibration acceleration according to the vibration acceleration signal is at the calibration value, and obtains that the hydraulic pressure of the brake caliper is within the preset range according to the wheel cylinder pressure signal. When the brake pedal signal is in the braking state, it is determined that the in-vehicle noise signal during this period is the creeping start noise, and the noise information is recorded.

8. The method according to claim 7, characterized in that, The calculation formula for the root mean square value of the second moment of the vibration acceleration is , where Q is the root mean square value of the second moment of the vibration acceleration, Ψ is the vibration acceleration value within a period of time, and t 0 , t 1 are the starting time and the ending time within a period of time, respectively.

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