Abnormal sound detector and automobile

Abstract

The utility model provides an abnormal sound detector and an automobile. The abnormal sound detector comprises a detector shell, a data processing module, a sound probe and a plurality of microphone probes, the plurality of microphone probes are arranged on the detector shell and are used for collecting first sound signals corresponding to the abnormal sound source and second sound signals corresponding to the sound probes; the data processing module is arranged in the detector shell, is connected with the plurality of microphone probes and is used for determining an area where an abnormal sound source is located according to the first sound signal and determining the position where the abnormal sound source is located according to the first sound signal and the second sound signal; the sound probe is placed in the area where the abnormal sound source is located and used for outputting a second sound signal. According to the utility model, the data processing module firstly analyzes the first sound signal so as to carry out coarse positioning on the position of the abnormal sound source; and then the first sound signal and the second sound signal are compared, the position of the abnormal sound source is accurately locked finally, and the effect of rapidly locking the abnormal sound source is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of abnormal sound detectors, and in particular relates to an abnormal sound detector and a car. Background Art

[0002] At present, the stethoscopes used in the automotive field are mechanical and electronic. The main method is to place the detection probe at different positions and judge whether the detection position is the source of the abnormal noise by the size and quality of the sound. This method first requires the inspection personnel to roughly determine where the abnormal noise is generated, and then place the inspection probe at the suspected location of the abnormal noise. By moving the inspection probe position multiple times and monitoring the abnormal noise transmitted from the probe in real time, the location of the abnormal noise can be determined. Since the position of the inspection probe needs to be moved multiple times, the efficiency is low; and for the noise transmitted through the panel structure, it is difficult to accurately determine the location of the abnormal noise due to the low attenuation during the noise transmission process. Summary of the invention

[0003] The utility model provides an abnormal sound detector to solve the problem that the existing abnormal sound detector has low detection efficiency and is difficult to accurately determine the abnormal sound position.

[0004] An abnormal sound detector comprises a detector housing, a data processing module, a sound probe and a plurality of microphone probes;

[0005] A plurality of microphone probes are arranged on the detector housing and are used to collect a first sound signal corresponding to an abnormal sound source and a second sound signal corresponding to the sound probe;

[0006] The data processing module is arranged in the detector housing and connected to the plurality of microphone probes, and is used to determine the area where the abnormal sound source is located according to the first sound signal, and to determine the location of the abnormal sound source according to the first sound signal and the second sound signal;

[0007] The sound probe is placed in the area where the abnormal sound source is located, and is used to output the second sound signal.

[0008] Preferably, at least three microphone probes are arranged at intervals on a side surface of the detector housing.

[0009] Preferably, the three microphone probes are arranged on a side surface of the detector housing at intervals along the first direction.

[0010] Preferably, the microphone probe is a rotatable probe.

[0011] Preferably, the abnormal sound detector further includes a display screen; the display screen is arranged on the detector housing, connected to the data processing module, and is used to display the sound signal collected by the microphone probe.

[0012] Preferably, the abnormal sound detector further comprises a function button connected to the data processing module; the function button is arranged on the detector housing.

[0013] Preferably, the abnormal sound detector further comprises a wired earphone jack electrically connected to the data processing module, the wired earphone jack is used to connect a wired earphone, and the wired earphone is used to collect the second sound signal.

[0014] A car comprises the abnormal noise detector.

[0015] The utility model, the abnormal sound detector comprises a detector housing, a data processing module, a sound probe and a plurality of microphone probes. During installation, a plurality of microphone probes are arranged on the detector housing to collect a first sound signal corresponding to the abnormal sound source and a second sound signal corresponding to the sound probe; the data processing module is arranged in the detector housing and connected to the plurality of microphone probes to determine the area where the abnormal sound source is located according to the first sound signal; then the sound probe is placed in the area where the abnormal sound source is located to output the second sound signal; the data processing module determines the location of the abnormal sound source according to the first sound signal and the second sound signal. In this arrangement, the first sound signal generated by the real abnormal sound source is first collected by the plurality of microphone probes, and the data processing module analyzes the first sound signal to roughly locate the location of the abnormal sound source and determine the area where the abnormal sound source is located; then the abnormal sound source is simulated to generate abnormal sound by the sound probe arranged in the area where the abnormal sound source is located, and then the second sound signal corresponding to the sound probe is collected by the plurality of microphone probes, and the data processing module compares the first sound signal corresponding to the abnormal sound source and the second sound signal corresponding to the sound probe, and finally accurately locks the location of the abnormal sound source, so as to achieve the effect of quickly locking the abnormal sound source. In this example, the sound signals collected by multiple microphones are used in conjunction with the sound positioning system in the data processing module for positioning, which reduces the difficulty and workload of locating the source of abnormal noise. The sound probe is used to simulate the abnormal noise source to produce abnormal noise, which improves the accuracy and work efficiency of locating the abnormal noise source and reduces the experience requirements for testers. At the same time, the probes are all wireless probes, which reduces the use of wiring harnesses and avoids safety issues caused by wired probes.

[0016] The abnormal noise detector in this example is used in automobiles. It uses the principle of sound source positioning and the invariance of the transfer function of sound in air and solids. By adding a sound probe to simulate the abnormal noise source to produce abnormal noise, and then comparing the positioning difference between the real abnormal noise source (i.e., the abnormal noise source corresponding to the first sound signal) and the simulated abnormal noise source (i.e., the sound probe corresponding to the second sound signal), the position of the real abnormal noise source is determined, thereby helping inspection personnel to quickly and accurately locate the real abnormal noise position and improve inspection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a structural diagram of the abnormal sound detector in the utility model.

[0019] Among them, 1. Detector housing; 2. Sound probe; 3. Microphone probe; 4. Display screen; 5. Function button; 6. Wired headphone jack. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The utility model embodiment provides an abnormal sound detector, referring to Figure 1The abnormal sound detector includes a detector housing 1, a data processing module, a sound probe 2 and a plurality of microphone probes 3; the plurality of microphone probes 3 are arranged on the detector housing 1, and are used to collect a first sound signal corresponding to the abnormal sound source and a second sound signal corresponding to the sound probe 2; the data processing module is arranged in the detector housing 1, and is connected to the plurality of microphone probes 3, and is used to determine the area where the abnormal sound source is located according to the first sound signal, and to determine the location of the abnormal sound source according to the first sound signal and the second sound signal; the sound probe 2 is placed in the area where the abnormal sound source is located, and is used to output the second sound signal.

[0024] As an example, the abnormal sound detector includes a detector housing 1, a data processing module, a sound probe 2 and a plurality of microphone probes 3. During installation, a plurality of microphone probes 3 are arranged on the detector housing 1 to collect a first sound signal corresponding to the abnormal sound source and a second sound signal corresponding to the sound probe 2; the data processing module is arranged in the detector housing 1 and connected to the plurality of microphone probes 3 to determine the area where the abnormal sound source is located according to the first sound signal; then the sound probe 2 is placed in the area where the abnormal sound source is located to output the second sound signal; and the data processing module determines the location of the abnormal sound source according to the first sound signal and the second sound signal. In this arrangement, the first sound signal generated by the real abnormal sound source is first collected by the plurality of microphone probes 3, and the data processing module analyzes the first sound signal to roughly locate the location of the abnormal sound source and determine the area where the abnormal sound source is located; then the abnormal sound source is simulated by the sound probe 2 arranged in the area where the abnormal sound source is located to generate an abnormal sound, and then the second sound signal corresponding to the sound probe 2 is collected by the plurality of microphone probes 3, and the data processing module compares the first sound signal corresponding to the abnormal sound source and the second sound signal corresponding to the sound probe 2, and finally accurately locks the location of the abnormal sound source, so as to achieve the effect of quickly locking the abnormal sound source. In this example, the sound signals collected by multiple microphones are used in conjunction with the sound positioning system in the data processing module for positioning, which reduces the difficulty and workload of locating the source of abnormal noise. The sound probe 2 simulates the abnormal noise source to produce abnormal noise, which improves the accuracy and work efficiency of locating the abnormal noise source. The experience requirements for testers are reduced. At the same time, the probes are all wireless probes, which reduces the use of wiring harnesses and avoids safety issues caused by wired probes.

[0025] The abnormal noise detector in this example is used in automobiles. It uses the principle of sound source positioning and the invariance of the transfer function of sound in air and solids. By adding a sound probe 2 to simulate the abnormal noise source to produce an abnormal noise, and then comparing the positioning difference between the real abnormal noise source (i.e., the abnormal noise source corresponding to the first sound signal) and the simulated abnormal noise source (i.e., the sound probe 2 corresponding to the second sound signal), the position of the real abnormal noise source is determined, thereby helping detection personnel to quickly and accurately locate the real abnormal noise position and improve detection efficiency.

[0026] In one embodiment, referring to Figure 1At least three microphone probes 3 are arranged at intervals on a side surface of the detector housing 1.

[0027] As an example, at least three microphone probes 3 are arranged at intervals on one side of the detector housing 1, so that sound signals can be collected from different directions. The data processing module determines the area where the abnormal sound source is located based on the first sound signal, that is, the rough positioning of the abnormal sound source is achieved. The microphone probe 3 can be set according to actual conditions, and three microphone probes 3 can be set. The three microphone probes 3 are arranged at intervals on one side of the detector housing 1; by comparing the time when the three microphone probes 3 collect the first sound signal corresponding to the abnormal sound source and the second sound signal corresponding to the sound probe 2, the distance between the abnormal sound source and the three microphone probes 3, and the distance between the sound probe 2 and the three microphone probes 3 can be determined, and then the position of the abnormal sound source can be determined, thereby improving the detection efficiency.

[0028] In one embodiment, referring to Figure 1 Three microphone probes 3 are arranged on a side surface of the detector housing 1 at intervals along a first direction.

[0029] As an example, three microphone probes 3 are arranged on a side surface of the detector housing 1 at intervals along the first direction. The distance of each microphone probe 3 from the abnormal sound source is determined according to the received sound signal, so that the sound signal can be collected in different directions. The data processing module determines the area where the abnormal sound source is located according to the first sound signal, that is, the rough positioning of the abnormal sound source is realized. For example, the distances between the three microphone probes 3 and the sound probe 2 are d1, d2 and d3 respectively, and d1, d2 and d3 are not equal, and the time for transmitting the sound signal is different. The data processing module can determine the microphone probe 3 that is closest to the sound probe 2 among the three microphone probes 3, thereby determining the area where the sound probe 2 is located.

[0030] In one embodiment, referring to Figure 1 , the microphone probe 3 is a rotatable probe.

[0031] As an example, the microphone probe 3 is used to collect various sound signals during testing. The microphone probe 3 is a rotatable probe that can be rotated within a certain spatial angle range, which is beneficial to the sound collection and positioning of the abnormal sound source in three-dimensional space.

[0032] In one embodiment, referring to Figure 1 The abnormal sound detector also includes a display screen 4; the display screen 4 is arranged on the detector housing 1 and is connected to the data processing module for displaying the sound signal collected by the microphone probe 3.

[0033] As an example, the abnormal sound detector further includes a display screen 4; the display screen 4 is arranged on the detector housing 1, connected to the data processing module, and is used to display the sound signal collected by the microphone probe 3, so that people can adjust the position of the microphone probe 3 and the position of the sound probe according to the information on the display screen 4 to adjust the detection direction. The microphone probe 3 collects the sound signal, and the data processing module outputs the time domain signal and the frequency domain signal on the display screen 4 according to the sound signal.

[0034] In one embodiment, referring to Figure 1 The abnormal sound detector also includes a function button 5 connected to the data processing module; the function button 5 is arranged on the detector housing 1.

[0035] As an example, the abnormal sound detector also includes a function button 5 connected to the data processing module; the function button 5 is set on the detector housing 1, and is used to control the operation of the abnormal sound detector and edit and convert the sound signal. When in use, press different function buttons 5 to select the function of the data processing module, and the sound signal is intercepted by the data processing module and then analyzed, including time domain and frequency domain conversion, Fourier transformation and wavelet analysis. After the abnormal sound signal is extracted, the analysis system preliminarily determines the approximate direction and position of the abnormal sound source based on the time difference of the abnormal sound signal reaching at least three microphone probes 3, and then places the sound probe 2 in the area and sends out a simulated abnormal sound source sound signal. The data processing module compares the real abnormal sound source sound signal with the simulated abnormal sound source sound signal, and gives the direction of adjusting the sound probe 2. By comparing the two signals again, the location where the abnormal sound source occurs is finally locked.

[0036] In one embodiment, referring to Figure 1 The abnormal sound detector also includes a wired earphone jack 6 electrically connected to the data processing module, the wired earphone jack 6 is used to connect a wired earphone, and the wired earphone is used to collect the second sound signal.

[0037] As an example, the abnormal sound detector also includes a wired headphone jack 6 electrically connected to the data processing module, and the wired headphone jack 6 is used to connect a wired headphone, and the wired headphone is used to collect the second sound signal. In this way, the sound output through the wired fidelity headphone is closer to the sound of the abnormal sound source, which helps to find the real location of the abnormal sound source and avoid distortion and interference of the sound signal.

[0038] The utility model embodiment provides a car, referring to Figure 1 , including abnormal sound detector.

[0039] As an example, in the process of automobile development, abnormal noise is a common problem, and almost all automobile parts may produce abnormal noise. There are many factors that cause abnormal noise, such as design, manufacturing and assembly. Therefore, after the abnormal noise occurs, finding the source of the abnormal noise is very important to solve the abnormal noise problem, and it is also the first step to solve the abnormal noise problem. The abnormal noise detector includes a detector housing 1, a data processing module, a sound probe 2 and a plurality of microphone probes 3. During installation, a plurality of microphone probes 3 are arranged on the detector housing 1 to collect the first sound signal corresponding to the abnormal sound source and the second sound signal corresponding to the sound probe 2; the data processing module is arranged in the detector housing 1 and connected to the plurality of microphone probes 3 to determine the area where the abnormal noise source is located according to the first sound signal; then the sound probe 2 is placed in the area where the abnormal noise source is located to output the second sound signal; the data processing module also determines the location of the abnormal noise source according to the first sound signal and the second sound signal. This setting first uses the sound positioning system in the multiple microphone probes 3 to roughly locate the position of the abnormal sound source, and then simulates the abnormal sound source through the sound probe 2 to generate abnormal sound. The multiple microphone probes 3 collect the first sound signal corresponding to the abnormal sound source and the second sound signal corresponding to the sound probe 2. The data processing module compares the first sound signal corresponding to the abnormal sound source and the second sound signal corresponding to the sound probe 2, and finally accurately locks the position of the abnormal sound source, achieving the effect of quickly locking the abnormal sound source. In this example, the sound signals collected by multiple microphones are used in conjunction with the sound positioning system in the data processing module for positioning, which reduces the difficulty and workload of locating the abnormal sound source; the abnormal sound source is simulated by the sound probe 2 to generate abnormal sound, which improves the accuracy and work efficiency of locating the abnormal sound source; reduces the experience requirements of the tester; at the same time, the probes are all wireless probes, which reduces the use of wiring harnesses and avoids the safety problems caused by wired probes.

[0040] The abnormal noise detector in this example is used in automobiles. It uses the principle of sound source positioning and the invariance of the transfer function of sound in air and solids. By adding a sound probe 2 to simulate the abnormal noise source to produce an abnormal noise, the location of the real abnormal noise source (i.e., the abnormal noise source corresponding to the first sound signal) and the simulated abnormal noise source (i.e., the sound probe 2 corresponding to the second sound signal) are compared to determine the location of the real abnormal noise source. This helps detection personnel to quickly and accurately locate the real abnormal noise location and improve detection efficiency.

[0041] When an abnormal sound is found in the car, the abnormal sound detector is first turned on, and the built-in microphone probe 3 is used to collect the sound signal when the abnormal sound occurs in the car. In order to improve the accuracy of locating the abnormal sound source, the sound signal can be collected at two different positions in the car. After the collection is completed, the data processing module of the abnormal sound detector is used to convert the sound signal into time domain and frequency domain, and the abnormal sound signal is extracted and calculated and analyzed, and the position of the abnormal sound source in the car is preliminarily located. The sound probe 2 is placed in the area of ​​the preliminary judgment, and the abnormal sound source is simulated to produce an abnormal sound. The abnormal sound detector then collects the simulated sound signal. By comparing the real abnormal sound source sound signal and the simulated abnormal sound source sound signal, the position of the sound probe 2 is gradually adjusted, and the position of the abnormal sound source can be accurately locked in the end.

[0042] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention.

Claims

1. An abnormal sound detector, characterized in that: It includes a detector housing, a data processing module, a sound probe and a plurality of microphone probes; A plurality of microphone probes are arranged on the detector housing and are used to collect a first sound signal corresponding to an abnormal sound source and a second sound signal corresponding to the sound probe; The data processing module is arranged in the detector housing and connected to the plurality of microphone probes, and is used to determine the area where the abnormal sound source is located according to the first sound signal, and to determine the location of the abnormal sound source according to the first sound signal and the second sound signal; The sound probe is placed in the area where the abnormal sound source is located, and is used to output the second sound signal.

2. The abnormal sound detector according to claim 1, characterized in that: At least three microphone probes are arranged at intervals on a side surface of the detector housing.

3. The abnormal sound detector according to claim 2, characterized in that: The three microphone probes are arranged on a side surface of the detector housing at intervals along a first direction.

4. The abnormal sound detector according to claim 1, characterized in that: The microphone probe is a rotatable probe.

5. The abnormal sound detector according to claim 1, characterized in that: The abnormal sound detector also includes a display screen; the display screen is arranged on the detector housing, connected to the data processing module, and is used to display the sound signal collected by the microphone probe.

6. The abnormal sound detector according to claim 4, characterized in that: The abnormal sound detector also includes a function button connected to the data processing module; the function button is arranged on the detector housing.

7. The abnormal sound detector according to claim 1, characterized in that: The abnormal sound detector also includes a wired earphone jack electrically connected to the data processing module, the wired earphone jack is used to connect a wired earphone, and the wired earphone is used to collect the second sound signal.

8. A car, characterized in that: Including the abnormal sound detector described in any one of claims 1-7.

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