Sound pressure detection device and sound pressure detection method

Abstract

The invention discloses a sound pressure detection device and a sound pressure detection method. The sound pressure detection device comprises a processing module, an automatic positioning module and a sound pressure detection module; the processing module is electrically connected with the automatic positioning module and is used for determining detection point location information according to the space information of the to-be-detected area and sending the detection point location information to the automatic positioning module; the automatic positioning module is connected with the sound pressure detection module and is used for driving the sound pressure detection module to move to the detection point according to the detection point information; the sound pressure detection module is electrically connected with the processing module and is used for detecting sound pressure signals of a plurality of detection points and transmitting the sound pressure signals to the processing module; the processing module is also used for adjusting the output signal of the sound source according to the plurality of sound pressure signals. By adopting the technical scheme, automatic positioning of the sound pressure detection position in the passenger room and accurate detection of the sound pressure signal are realized, the output signal of the source is adjusted in time according to the state of the sound pressure signal, and the sound pressure of the passenger room is kept stable.

Description

Technical Field

[0001] This invention relates to the field of sound pressure detection technology, and in particular to a sound pressure detection device and a sound pressure detection method. Background Technology

[0002] Urban rail transit vehicle passenger announcement systems should provide passengers with uniform sound field broadcasts, making it crucial to monitor the sound pressure level in the passenger compartment. However, most studies tend to focus on noise monitoring or operational health assessments of specific equipment, rather than monitoring the sound pressure level of an entire space.

[0003] Current sound pressure level (SPL) testing methods mostly rely on personnel carrying SPL meters. This not only limits the number of measurement points and introduces measurement inaccuracies, but also fails to accurately reflect the true sound field distribution within the guest room based on the different speaker arrangements. Adding measurement points to improve the comprehensiveness of the test necessitates manual measurement, which not only prolongs the measurement cycle but also introduces additional errors due to the repetitive nature of manual operations. Furthermore, these methods lack the functionality to automatically locate measurement points based on the guest room size, perform SPL testing, and generate SPL adjustment suggestions based on the measured signals. Summary of the Invention

[0004] This invention provides a sound pressure detection device and a sound pressure detection method. By setting up a device that can automatically locate and detect sound pressure and provide sound pressure status feedback, the device can automatically locate the sound pressure detection position in the room and accurately detect the sound pressure signal. Based on the sound pressure signal status, the device can generate sound pressure adjustment suggestions to ensure the stability of the sound pressure.

[0005] In a first aspect, embodiments of the present invention provide a sound pressure detection device, which includes a processing module, an automatic positioning module, and a sound pressure detection module;

[0006] The processing module is connected to the automatic positioning module and is used to determine the detection point information based on the spatial information of the area to be detected and send the detection point information to the automatic positioning module.

[0007] The automatic positioning module is connected to the sound pressure detection module and is used to move the sound pressure detection module to the detection point based on the detection point information.

[0008] The sound pressure detection module is electrically connected to the processing module and is used to detect sound pressure signals at multiple detection points and transmit the multiple sound pressure signals to the processing module.

[0009] The processing module is also used to adjust the output signal of the sound source based on multiple sound pressure signals.

[0010] Optionally, the processing module is also used to determine a reference sound pressure signal based on multiple sound pressure signals, and to determine the retest points among multiple detection points that need to be retested based on the multiple sound pressure signals and the reference sound pressure signal;

[0011] The processing module is also used to control the automatic positioning module and the sound pressure detection module to detect the retest sound pressure signal at the retest point after adjusting the output signal of the sound source, and to determine whether the retest sound pressure signal meets the sound pressure requirements based on the retest sound pressure signal and the output signal of the adjusted sound source.

[0012] Optionally, the automatic positioning module includes a control unit and a rotary telescopic unit;

[0013] The control unit is electrically connected to the processing module and the rotary telescopic unit respectively. It is used to receive the detection point information and control the rotation angle and telescopic distance of the rotary telescopic unit according to the detection point information.

[0014] Optionally, the control unit includes an interactive interface, which is used to obtain the position information of the automatic positioning module based on the interactive interface, and to calculate the rotation angle and extension distance of the rotating telescopic unit based on the position information and the detection point information.

[0015] Optionally, the control unit includes an interactive interface; the control unit is used to acquire spatial information of the area to be detected based on the interactive interface, and transmit the spatial information of the area to be detected to the processing module.

[0016] Optionally, the spatial information of the area to be detected includes: the length, width, and detection interval of the area to be detected.

[0017] Optionally, the automatic positioning module may also include a height adjustment unit;

[0018] The control unit is also electrically connected to the height adjustment unit, which is used to control the height adjustment unit to adjust the height of the automatic positioning module according to test requirements.

[0019] Secondly, embodiments of the present invention provide a sound pressure detection method, applied to a sound pressure detection device, the sound pressure detection method comprising:

[0020] The detection point information is determined based on the spatial information of the area to be detected, and the detection point information is sent to the automatic positioning module so that the automatic positioning module can drive the sound pressure detection module to move to the detection point according to the detection point information.

[0021] It receives multiple sound pressure signals from the sound pressure detection module and adjusts the output signal of the sound source according to the sound pressure signals.

[0022] Optionally, after receiving multiple sound pressure signals from the sound pressure detection module, the system further includes:

[0023] The reference sound pressure signal is determined based on multiple sound pressure signals;

[0024] Based on multiple sound pressure signals and a reference sound pressure signal, determine the retest points among multiple detection points that need to be retested;

[0025] After adjusting the output signal of the sound source based on the sound pressure signal, the following is also included:

[0026] The automatic positioning module and the sound pressure detection module are controlled to detect the retest sound pressure signal at the retest point;

[0027] Determine whether the re-measured sound pressure signal meets the sound pressure requirements based on the re-measured sound pressure signal and the output signal of the adjusted sound source.

[0028] Optionally, a reference sound pressure signal is determined based on multiple sound pressure signals, including:

[0029] The average sound pressure signal of multiple sound pressure signals is determined based on multiple sound pressure signals;

[0030] The average sound pressure signal is determined as the reference sound pressure signal;

[0031] Based on multiple sound pressure signals and a reference sound pressure signal, determine the retesting points among multiple detection points that need to be retested, including:

[0032] Among multiple sound pressure signals, the sound pressure signal whose difference from the reference sound pressure signal is greater than a preset difference is identified as an abnormal sound pressure signal;

[0033] The detection points corresponding to the abnormal sound pressure signals are identified as the retesting points that need to be retested.

[0034] This invention provides a sound pressure level (SPL) detection device and method. The SPL detection device comprises a processing module, an automatic positioning module, and a sound pressure level (SPL) detection module. The processing module is electrically connected to the automatic positioning module, the automatic positioning module is connected to the SPL detection module, and the SPL detection module is electrically connected to the processing module. The processing module determines the detection point information based on the spatial information of the area to be detected and sends this information to the automatic positioning module. The automatic positioning module moves the SPL detection module to the detection point based on the SPL information. The SPL detection module detects the SPL signals at multiple detection points and transmits these signals to the processing module. The processing module adjusts the output signal of the sound source based on the multiple SPL signals. Through input control, SPL detection, and output feedback logic, the device achieves automatic positioning of the SPL detection points and automatic detection of SPL signals within the passenger room area. It also adjusts the output signal of the sound source in a timely manner based on the SPL signal status to maintain stable SPL in the passenger room. This improves the automation and accuracy of SPL detection, increases the accuracy of SPL adjustment, and reduces the problems associated with manual operation, such as the difficulty in accurately reflecting the sound field distribution level in the passenger room, long detection time, and susceptibility to operational errors. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of a sound pressure detection device provided in an embodiment of the present invention;

[0036] Figure 2 This is a schematic diagram of another sound pressure detection device provided in an embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram illustrating the determination of sound pressure detection points according to an embodiment of the present invention;

[0038] Figure 4 This is a schematic diagram of sound pressure detection point division provided by an embodiment of the present invention;

[0039] Figure 5 This is a flowchart of a sound pressure detection method provided by an embodiment of the present invention;

[0040] Figure 6 This is a flowchart of another sound pressure detection method provided by an embodiment of the present invention;

[0041] Figure 7 This is a flowchart of another sound pressure detection method provided in an embodiment of the present invention.

[0042] In this embodiment of the invention, the reference numerals and corresponding feature names are as follows:

[0043] 110 - Processing module, 120 - Automatic positioning module, 130 - Sound pressure detection module, 140 - Interactive interface, 121 - Control unit, 122 - Rotation and telescopic unit, 123 - Height adjustment unit. Detailed Implementation

[0044] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0045] The terminology used in the embodiments of this invention is for the purpose of describing specific embodiments only and is not intended to limit the invention. It should be noted that directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this invention are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this invention. Furthermore, in the context, it should be understood that when referring to an element being formed "upper" or "lower" of another element, it can be formed not only directly "upper" or "lower" of the other element, but also indirectly "upper" or "lower" of the other element through an intermediate element. The terms "first," "second," etc., are used for descriptive purposes only and do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0047] Figure 1 This is a schematic diagram of a sound pressure detection device provided in an embodiment of the present invention. This embodiment of the present invention is applicable to situations involving sound pressure detection and adjustment of the passenger cabin broadcast system in vehicles. Figure 1 As shown, the sound pressure detection device provided in this embodiment of the invention includes: a processing module 110, an automatic positioning module 120, and a sound pressure detection module 130; the processing module 110 is electrically connected to the automatic positioning module 120 and is used to determine the detection point information according to the spatial information of the area to be detected and send the detection point information to the automatic positioning module 120; the automatic positioning module 120 is connected to the sound pressure detection module 130 and is used to move the sound pressure detection module 130 to the detection point according to the detection point information; the sound pressure detection module 130 is electrically connected to the processing module 110 and is used to detect the sound pressure signals of multiple detection points and transmit the multiple sound pressure signals to the processing module 110; the processing module 110 is also used to adjust the output signal of the sound source according to the multiple sound pressure signals.

[0048] In this embodiment, the sound pressure detection device includes a processing module 110, an automatic positioning module 120, and a sound pressure detection module 130. The processing module 110 can be understood as a device or system responsible for receiving input signals or data, processing them through preset algorithms, logical operations, or physical conversions, and ultimately outputting the target result. For example, the processing module 110 includes, but is not limited to, a server; this embodiment of the invention does not impose such limitations. The automatic positioning module 120 can be understood as a component that automatically outputs the position information of a target object relative to preset information after collecting its own spatial feature information, algorithm analysis, and data verification, and can achieve autonomous positioning of the target object within a specific spatial range. For example, the automatic positioning module 120 includes, but is not limited to, an automatic telescopic support or an automatic positioning robot; this embodiment of the invention does not impose such limitations. The sound pressure detection module 130 can be understood as a functional component that can perform real-time acquisition and conversion of sound pressure signals in a target environment or specific sound field without human intervention. For example, the sound pressure detection module 130 includes, but is not limited to, a sound pressure detector.

[0049] Specifically, the processing module 110 is electrically connected to the automatic positioning module 120, which in turn is connected to the sound pressure detection module 130, with the sound pressure detection module 130 located at the end of the automatic positioning module 120. The sound pressure detection module 130 is then electrically connected to the processing module 110. The processing module 110 determines the detection point information based on the spatial information of the area to be detected and sends this information to the automatic positioning module 120. The automatic positioning module 120 moves the sound pressure detection module 130 to the detection point based on the detection point information. The sound pressure detection module 130 detects sound pressure signals at multiple detection points and transmits these signals to the processing module 110 via the automatic positioning module 120. The processing module 110 adjusts the output signal of the sound source based on the multiple sound pressure signals.

[0050] For example, during the sound pressure detection process in a passenger bus cabin, the processing module 110 divides the cabin area to be detected and the detection points based on the acquired cabin area information, and transmits the detection point information to the automatic positioning module 120. The automatic positioning module 120 is placed at position A in the cabin area. The automatic positioning module 120 acquires the information at position A and automatically moves according to the detection point information, moving the sound pressure detection module 130 to the detection point. The sound pressure detection module 130 collects the sound pressure signal at its location and transmits the sound pressure signal to the processing module 110. The processing module 110 records the sound pressure signal and evaluates the sound pressure state of the cabin based on the acquired sound pressure signal, generating information to adjust the sound source output signal.

[0051] The sound pressure detection device provided in this embodiment of the invention includes a processing module 110, an automatic positioning module 120, and a sound pressure detection module 130. The processing module 110 determines the detection point information based on the spatial information of the area to be detected and sends this information to the automatic positioning module 120. The automatic positioning module 120 moves the sound pressure detection module 130 to the detection point based on the detection point information. The sound pressure detection module 130 detects sound pressure signals at multiple detection points and transmits these signals to the processing module 110. The processing module 110 adjusts the output signal of the sound source based on the multiple sound pressure signals. Through input control, sound pressure detection, and output feedback logic, the device achieves automatic positioning of the sound pressure detection points and automatic detection of sound pressure signals within the passenger room area. It also adjusts the output signal of the sound source in a timely manner based on the sound pressure signal status to maintain stable sound pressure in the passenger room. This improves the automation and accuracy of sound pressure detection, increases the accuracy of sound pressure adjustment, and reduces the problems associated with manual operation, such as difficulty in reflecting the sound field distribution level in the passenger room, long detection time, and susceptibility to operational errors.

[0052] Optional, you can continue to refer to Figure 1The processing module 110 is also used to determine a reference sound pressure signal based on multiple sound pressure signals, and to determine the retest points among multiple detection points that need to be retested based on the multiple sound pressure signals and the reference sound pressure signal; the processing module 110 is also used to control the automatic positioning module 120 and the sound pressure detection module 130 to detect the retest sound pressure signal of the retest point after adjusting the output signal of the sound source, and to determine whether the retest sound pressure signal meets the sound pressure requirements based on the retest sound pressure signal and the adjusted output signal of the sound source.

[0053] In this embodiment, the processing module 110 is further configured to determine a reference sound pressure signal based on multiple sound pressure signals. The reference sound pressure signal can be understood as a reference physical quantity used to quantify sound pressure intensity and calibrate measurement accuracy. Specifically, the processing module 110 statistically analyzes the acquired multiple sound pressure signals, calculates the average value of the sound pressure signals, and uses this average value as the reference sound pressure signal. The processing module 110 determines the difference between the sound pressure at multiple detection points and the reference sound pressure signal, as well as the location of the maximum sound pressure difference. It then sets sound pressure state rules based on the difference between the sound pressure at the test points and the reference sound pressure signal, and determines the retest points among the detection points that need to be retested based on the location of the maximum sound pressure difference.

[0054] Specifically, after the processing module 110 adjusts the output signal of the sound source, it controls the automatic positioning module 120 and the sound pressure detection module 130 to detect the retest sound pressure signal of the retest point in the same way, and determines whether the retest sound pressure signal meets the sound pressure requirements based on the retest sound pressure signal and the output signal of the adjusted sound source.

[0055] For example, the processing module 110 statistically analyzes the acquired sound pressure signals, using all sound pressure signals within a 3dB range of the most concentrated sampling points as data for calculating the average sound pressure level. This average value is then used as a reference sound pressure signal. All detected sound pressure signals are compared to the reference signal, and sound pressure status rules are set. A sound pressure status where the absolute value of the sound pressure difference with the reference signal is less than or equal to 1.5dB is defined as good; a sound pressure status where the absolute value of the sound pressure difference with the reference signal is greater than 1.5dB and less than or equal to 3dB is defined as acceptable; and a sound pressure status where the absolute value of the sound pressure difference with the reference signal is greater than 3dB is defined as poor. Simultaneously, the processing module 110 also generates a sound pressure signal dot matrix diagram, using different colors to define the sound pressure status, allowing staff to intuitively obtain the sound pressure distribution status of the detection points. Green indicates a good sound pressure status, orange indicates an acceptable sound pressure status, and red indicates a poor sound pressure status. If a red color appears or the absolute value of the sound pressure difference with the reference sound pressure signal is greater than 3dB, it indicates that the detection point has an out-of-tolerance phenomenon. The processing module 110 will generate a suggestion for a dispersed sound generation device for a positive out-of-tolerance phenomenon and a suggestion for a concentrated sound generation device for a negative out-of-tolerance phenomenon, and recommend this detection point as a retest point.

[0056] After adjusting the output signal of the sound source according to the adjustment suggestions generated by the processing module 110, the automatic positioning module 120 and the sound pressure detection module 130 detect the retested sound pressure signal at the retest point. Then, based on the retested sound pressure signal and the adjusted output signal of the sound source, they determine again whether the retested sound pressure signal meets the sound pressure requirements. For example, if the absolute value of the sound pressure difference between the retested sound pressure signal and the reference sound pressure signal obtained from the adjusted output signal of the sound source is less than 3dB, it can be confirmed that the retested sound pressure signal meets the sound pressure requirements of the detection area.

[0057] The sound pressure detection device provided in this embodiment of the invention includes a processing module 110 that determines a reference sound pressure signal based on multiple sound pressure signals, and then determines retesting points among multiple detection points based on the multiple sound pressure signals and the reference sound pressure signal. After adjusting the output signal of the sound source, the automatic positioning module 120 and the sound pressure detection module 130 are controlled to detect the retesting sound pressure signal at the retesting point, and determine whether the retesting sound pressure signal meets the sound pressure requirements based on the retesting sound pressure signal and the adjusted output signal of the sound source. A reference benchmark is established based on the actual scenario, automatically identifying abnormal points that need to be retested, avoiding blind retesting or missing key points, and eliminating the need for additional screening of retesting points, thus shortening the preparation time for retesting and improving retesting efficiency and the automation of sound pressure adjustment. This solves the problem of low adjustment efficiency and poor effect caused by sound pressure detection only indicating out-of-tolerance without providing specific adjustment solutions.

[0058] Figure 2 This is a schematic diagram of another sound pressure detection device provided in an embodiment of the present invention, as shown below. Figure 2 As shown, the automatic positioning module 120 includes a control unit 121 and a rotation and telescopic unit 122. The control unit 121 is electrically connected to the processing module 110 and the rotation and telescopic unit 122 respectively, and is used to receive detection point information and control the rotation angle and telescopic distance of the rotation and telescopic unit 122 according to the detection point information.

[0059] In this embodiment, the automatic positioning module 120 includes a control unit 121 and a rotary telescopic unit 122. The control unit 121 can be understood as a device capable of parsing, judging, and processing received information according to preset control logic or external input signals, automatically generating control commands, and outputting them to the actuator. The rotary telescopic unit 122 can be understood as a component capable of realizing the rotational and telescopic movements of the output end through power drive and transmission cooperation under the trigger of a control signal.

[0060] Specifically, the control unit 121 is electrically connected to the processing module 110 and the rotating telescopic unit 122 respectively. The control unit 121 receives the detection point information from the processing module 110 and controls the rotation angle and telescopic distance of the rotating telescopic unit 122 according to the detection point information, so that the rotating telescopic unit 122 reaches the detection point through rotation and telescopic movement to detect the sound pressure signal.

[0061] For example, the detection point information transmitted from the processing module 110 to the control unit 121 is number 3, located at 45° northeast of the position of the automatic positioning module 120, at a distance of 300mm. After receiving and parsing this information, the control unit 121 calculates that the rotation angle is 45° clockwise and the extension distance is 300mm. The control unit 121 outputs a corresponding command to the rotating extension unit 122, driving the rotating extension unit 122 to first rotate 45° to align with the target point and then extend and retract by 300mm, so that the sound pressure detection module 130 can detect the sound pressure at the detection point number 3.

[0062] The sound pressure detection device provided in this embodiment of the invention, by setting a control unit 121 and a rotary telescopic unit 122 in the automatic positioning module 120, enables the control unit 121 to receive detection point information from the processing module 110, and control the rotation angle and telescopic distance of the rotary telescopic unit 122 according to the detection point information to complete the sound pressure detection of the detection point. This achieves automated acquisition and conversion of sound pressure detection information, allowing the rotary telescopic unit 122 to reach the target point without manual intervention, thus improving positioning accuracy. It solves the problems of low efficiency and poor accuracy associated with manual point judgment and manual adjustment of the motion mechanism.

[0063] Optional, you can continue to refer to Figure 2 The control unit 121 includes an interactive interface 140. The control unit 121 is used to obtain the position information of the automatic positioning module 120 based on the interactive interface 140, and to calculate the rotation angle and extension distance of the rotating telescopic unit 122 based on the position information and the detection point information.

[0064] In this embodiment, the control unit 121 includes an interaction interface 140, which can be understood as a bridge enabling information interaction between a person and the device / system, used to collect, convert, and transmit user commands. Specifically, the control unit 121 obtains the position information of the automatic positioning module 120 based on the interaction interface 140, and calculates the rotation angle and extension distance of the rotating telescopic unit 122 based on the position information of the automatic positioning module 120 and the detection point information from the processing module 110.

[0065] For example, Figure 3 This is a schematic diagram illustrating the determination of sound pressure detection points according to an embodiment of the present invention. Figure 3As shown, the coordinate information of the detection point Q is (a Q b Q The position coordinates of the automatic positioning module 120 in the detection area are (a) TPn b TPn The telescopic distance of the rotary telescopic unit 122 is... If the rotation angle is positive when rotating to the right from the center of rotation and negative when rotating to the left, then the range of the rotation angle is [-90°, 90°]. .

[0066] The sound pressure detection device provided in this embodiment of the invention includes an interactive interface 140 in the control unit 121. The interface 140 acquires the location information of the detection area where the automatic positioning module 120 is located. Based on this location information and the detection point information transmitted to the control unit 121 by the processing module 110, the rotation angle and extension distance of the rotating telescopic unit 122 are calculated. This achieves flexible acquisition of the location information of the automatic positioning module 120 and accurate calculation of the rotation angle and extension distance of the rotating telescopic unit 122, ensuring accurate acquisition of the sound pressure signal at the detection point. It solves the problem of inaccurate sound pressure signal acquisition caused by positioning errors due to the cumbersome calculations of manual calculations.

[0067] Optional, you can continue to refer to Figure 2 The control unit 121 includes an interactive interface 140; the control unit 121 is used to acquire spatial information of the area to be detected based on the interactive interface 140, and transmit the spatial information of the area to be detected to the processing module 110.

[0068] Specifically, the spatial information of the area to be detected is input through the interaction interface 140 of the control unit 121, and the control unit 121 transmits the acquired spatial information of the area to be detected to the processing module 110. The processing module 110 automatically divides the detection area and detection points according to the spatial information of the area to be detected, and numbers the detection points.

[0069] Optionally, the spatial information of the area to be detected includes: the length, width, and detection interval of the area to be detected.

[0070] Specifically, the length, width, and detection interval information of the area to be detected are input through the interaction interface 140 of the control unit 121. The control unit 121 then transmits these information to the processing module 110. The processing module 110 divides the detection area according to the length, width, and detection interval information and generates detection position numbers.

[0071] For example, Figure 4This is a schematic diagram of sound pressure detection point division provided by an embodiment of the present invention, as shown below. Figure 4 As shown, the area to be inspected in the passenger compartment is rectangular. The length, width, and detection intervals along the vehicle length and width directions of the area to be inspected are input to the control unit 121 via the interaction interface 140. The control unit 121 transmits the acquired length, width, and detection intervals along the vehicle length and width directions of the area to be inspected to the processing module 110. The origin O of the two-dimensional coordinate system is defined by the center lines of the passenger compartment (both horizontal and vertical). The positive X-axis points from the center line along the width direction towards position I, and the positive Y-axis points from the center line along the length direction towards position II. Figure 4 The length information of the area to be tested is L, and the width information is W. The sound pressure detection points in the passenger compartment are evenly distributed, and the detection interval information along the vehicle length direction is set to l, and the detection interval information along the vehicle width direction is set to w. The processing module can generate all test points and point codes in the area to be tested based on the length information, width information, detection interval information along the vehicle length direction, and detection interval information along the vehicle width direction of the area to be tested.

[0072] For example, the detection area of ​​the detection point is set to 3l×2w, and the detection direction is specified as four standard directions: up (0,Y+), down (0,Y-), left (X-,0), and right (X+,0). Then, the position of point TP1 is (-4l,w), and the detection direction is (X-,Y+); the position of point TP2 is (0,w), and the detection direction is (0,Y+); and the position of point TP3 is (4l,w), and the detection direction is (X,Y+).

[0073] This invention acquires the length, width, and detection interval information of the area to be detected through the interaction interface 140 based on the control unit 121, and transmits this information to the processing module 110. This achieves standardized input and accurate transmission of the detection area parameters, reducing parameter errors caused by manual input or non-standardized transmission. The processing module 110 then divides the detection area based on this information and generates detection position numbers, achieving automated and intelligent division of the detection area. This eliminates the need for manual calculation or division, improving the efficiency and consistency of area division, shortening the detection preparation cycle, and reducing operational complexity. It solves the problems of error and low efficiency associated with manual operation.

[0074] Optional, you can continue to refer to Figure 2 The automatic positioning module 120 also includes a height adjustment unit 123; the control unit 121 is also electrically connected to the height adjustment unit 123 and is used to control the height adjustment unit 123 to adjust the height of the automatic positioning module 120 according to the test requirements.

[0075] In this embodiment, the automatic positioning module 120 further includes a height adjustment unit 123. The height adjustment unit 123 can be understood as a component that, upon triggering a control command, enables the mounted object to linearly rise and fall along the vertical direction or a preset height, ensuring the accuracy of height adjustment. For example, the height adjustment unit 123 includes, but is not limited to, a height adjustment bracket, and this embodiment of the invention does not impose any limitations on it.

[0076] Specifically, the control unit 121 is electrically connected to the height adjustment unit 123. According to testing requirements, the control unit 121 controls the height adjustment unit 123 to adjust the height of the automatic positioning module 120, enabling flexible adjustment of the automatic positioning module 120's height and giving it wide applicability. For example, during sound pressure testing in a train passenger compartment, according to the requirements of urban rail vehicle testing, and without any special user requirements, a plane 1.2m above the floor is selected as the test plane. In this case, the control unit 121 controls the height adjustment unit 123 to adjust the height of the automatic positioning module 120 to 1.2m.

[0077] The sound pressure detection device provided in this embodiment of the invention includes a height adjustment unit 123 electrically connected to the control unit 121 within the automatic positioning module 120. This unit allows for flexible adjustment of the height of the automatic positioning module 120 according to actual testing requirements. This eliminates the need for disassembling or reinstalling the module, improving the accuracy and automation of the height adjustment of the automatic positioning module 120 and preventing detection interruptions or data deviations caused by height mismatch during sound pressure detection. It solves the problems of fixed height and poor adaptability of the automatic positioning module 120, thus enhancing the device's versatility.

[0078] Based on the same inventive concept, this invention also provides a sound pressure detection method. Figure 5 This is a flowchart of a sound pressure detection method provided by an embodiment of the present invention. The sound pressure detection method can be applied to the sound pressure detection device provided in any of the above optional embodiments. Figure 5 As shown, the sound pressure detection method includes:

[0079] S101. Determine the detection point information based on the spatial information of the area to be detected and send the detection point information to the automatic positioning module so that the automatic positioning module can drive the sound pressure detection module to move to the detection point according to the detection point information.

[0080] Specifically, the processing module receives the spatial information of the area to be detected, determines the detection point information based on the spatial information, and sends the detection point information to the automatic positioning module. The automatic positioning module is connected to the sound pressure detection module, and moves the sound pressure detection module to the detection point according to the detection point information to collect the sound pressure signal at the detection point.

[0081] S102: Receive multiple sound pressure signals fed back by the sound pressure detection module, and adjust the output signal of the sound source according to the sound pressure signals.

[0082] Specifically, the sound pressure detection module and the processing module are electrically connected. The sound pressure detection module transmits the sound pressure signals collected at multiple detection points to the processing module through the automatic positioning module. The processing module receives the multiple sound pressure signals fed back by the sound pressure detection module and adjusts the output signal of the sound source according to the sound pressure signals so that the sound pressure signal in the detection area meets the requirements.

[0083] The sound pressure detection method provided in this invention adopts the above technical solution. Through input control, sound pressure detection, and output feedback logic, it achieves automatic positioning of the sound pressure detection position and automatic detection of the sound pressure signal within the passenger room area, and adjusts the output signal of the sound source in a timely manner according to the sound pressure signal status. This improves the automation and accuracy of sound pressure detection, increases the accuracy of sound pressure adjustment, and reduces the problems of manual operation, such as sound pressure detection failing to reflect the sound field distribution level of the passenger room, long detection time, and susceptibility to operational errors.

[0084] Figure 6 This is a flowchart of another sound pressure detection method provided by an embodiment of the present invention. This embodiment elaborates on the steps following the receipt of multiple sound pressure signals from the sound pressure detection module, based on the above-described implementation. For example... Figure 6 As shown, the method includes:

[0085] S201. Determine the detection point information based on the spatial information of the area to be detected and send the detection point information to the automatic positioning module so that the automatic positioning module can drive the sound pressure detection module to move to the detection point according to the detection point information.

[0086] S202, Receive multiple sound pressure signals fed back by the sound pressure detection module.

[0087] S203. Determine the reference sound pressure signal based on multiple sound pressure signals.

[0088] Specifically, after receiving multiple sound pressure signals from the sound pressure detection module, the processing module determines a reference sound pressure signal based on these signals. This reference sound pressure signal can be understood as a benchmark physical quantity used to quantify sound pressure intensity and calibrate measurement accuracy. Methods for determining the reference sound pressure signal include, but are not limited to, the processing module calculating the average value of the acquired sound pressure signals and using this average value as the reference sound pressure signal.

[0089] S204. Based on multiple sound pressure signals and a reference sound pressure signal, determine the retest points among multiple detection points that need to be retested.

[0090] Specifically, after determining the reference sound pressure signal, the difference between the sound pressure at the test point and the reference sound pressure signal is determined based on multiple sound pressure signals and the reference sound pressure signal, and the location with the largest sound pressure difference is selected. Sound pressure state rules are set based on the difference between the sound pressure at the test point and the reference sound pressure signal, and the retest points among the multiple test points are determined based on the location with the largest sound pressure difference.

[0091] The established sound pressure level (SPL) status rules include, but are not limited to, defining a SPL status of less than or equal to 1.5 dB as good, a SPL status of greater than 1.5 dB and less than or equal to 3 dB as acceptable, and a SPL status of greater than 3 dB as poor. Different colors are used to define the SPL status: green for good, orange for acceptable, and red for poor. This embodiment of the invention does not impose any limitations on this.

[0092] S205. Adjust the output signal of the sound source according to the sound pressure signal.

[0093] Specifically, the processing module determines the sound pressure state of the detection point based on the acquired sound pressure signal and sound pressure state rules. If the sound pressure difference is greater than a preset difference threshold, it indicates that an out-of-tolerance phenomenon has occurred at this detection point. The processing module will then generate suggestions for adjusting the output signal of the sound source based on the out-of-tolerance phenomenon. For positive out-of-tolerance phenomena, suggestions for a distributed sound generation device are generated; for negative out-of-tolerance phenomena, suggestions for a centralized sound generation device are generated.

[0094] S206, Control the automatic positioning module and sound pressure detection module to detect the retest sound pressure signal at the retest point.

[0095] Specifically, after the processing module adjusts the output signal of the sound source, the control unit adjusts the position, height, and angle information of the automatic positioning module according to the location information of the retest point, so that the automatic positioning module reaches the retest point and ensures that the sound pressure detection module can retest the sound pressure signal at the retest point.

[0096] S207. Determine whether the re-measured sound pressure signal meets the sound pressure requirements based on the re-measured sound pressure signal and the output signal of the adjusted sound source.

[0097] Specifically, after detecting the re-measured sound pressure signal at the re-measured point, the processing module determines the reference sound pressure signal again based on the re-measured sound pressure signal and the output signal of the adjusted sound source. Once multiple sound pressure signals and the reference sound pressure signal are determined, the processing module's adjustment suggestions are assessed to determine their effectiveness and whether the re-measured sound pressure signal meets the sound pressure requirements. For example, if the absolute value of the sound pressure difference between the re-measured sound pressure signal and the reference sound pressure signal obtained from the output signal of the adjusted sound source is less than 3 dB, then it can be confirmed that the re-measured sound pressure signal meets the sound pressure requirements of the detection area.

[0098] This invention employs the above technical solution, determining a reference sound pressure signal based on multiple sound pressure signals, and then identifying retesting points among multiple detection points based on the multiple sound pressure signals and the reference sound pressure signal. After adjusting the output signal of the sound source, the automatic positioning module and the sound pressure detection module detect the retesting sound pressure signal at the retesting point, and determine whether the retesting sound pressure signal meets the sound pressure requirements based on the retesting sound pressure signal and the adjusted output signal of the sound source. A reference benchmark is established based on the actual scenario, automatically identifying abnormal points that need to be retested, avoiding blind retesting or missing key points, eliminating the need for additional screening of retesting points, shortening the preparation time for retesting, and improving retesting efficiency and the automation of sound pressure adjustment. This solves the problem of low adjustment efficiency and poor results caused by sound pressure detection only indicating out-of-tolerance without providing specific adjustment solutions.

[0099] Figure 7 This is a flowchart of another sound pressure detection method provided by an embodiment of the present invention. This embodiment describes in detail the specific method for determining the reference sound pressure signal based on the above-described implementation. For example... Figure 7 As shown, the method includes:

[0100] S301. Determine the detection point information based on the spatial information of the area to be detected and send the detection point information to the automatic positioning module so that the automatic positioning module can drive the sound pressure detection module to move to the detection point according to the detection point information.

[0101] S302, Receive multiple sound pressure signals fed back by the sound pressure detection module.

[0102] S303. Determine the average sound pressure signal of multiple sound pressure signals based on multiple sound pressure signals.

[0103] Specifically, the processing module calculates the average value of all measured values ​​within a preset sound pressure range from the acquired multiple sound pressure signals. By integrating and calculating the multiple discrete sound pressure signals, an average sound pressure signal representing the overall sound pressure level is obtained, reflecting the overall state of sound pressure in the detection area.

[0104] S304. The average sound pressure signal is determined as the reference sound pressure signal.

[0105] Specifically, the calculated average sound pressure signal is used as a reference sound pressure signal to provide a reference benchmark for subsequent sound pressure detection, sound pressure state rule determination and sound pressure regulation. By comparing the detected sound pressure signal with the reference sound pressure signal, it is determined whether there is an out-of-tolerance phenomenon.

[0106] S305. Among multiple sound pressure signals, the sound pressure signal whose difference from the reference sound pressure signal is greater than a preset difference is identified as an abnormal sound pressure signal.

[0107] Specifically, the difference between multiple sound pressure signals and a reference sound pressure signal is calculated one by one. After the calculation, if there is a sound pressure signal with a difference significantly greater than a preset difference, then this sound pressure signal is determined to be abnormal. For example, the preset difference is 3dB. If the difference between the sound pressure signal and the reference sound pressure signal is greater than 3dB, then this sound pressure signal is determined to be an abnormal sound pressure signal.

[0108] S306. The detection points corresponding to the abnormal sound pressure signals are determined as the retest points that need to be retested.

[0109] Specifically, after identifying the abnormal sound pressure signal, the detection point corresponding to the abnormal sound pressure signal is obtained, and the detection point where this sound pressure signal was detected is determined as the retest point that needs to be retested, so as to provide a basis for the reliability of the sound pressure detection results.

[0110] S307, and adjust the output signal of the sound source according to the sound pressure signal.

[0111] S308 controls the automatic positioning module and the sound pressure detection module to detect the retest sound pressure signal at the retest point.

[0112] S309. Determine whether the re-measured sound pressure signal meets the sound pressure requirements based on the re-measured sound pressure signal and the output signal of the adjusted sound source.

[0113] This invention employs the above technical solution. The processing module calculates the average sound pressure signal based on multiple sound pressure signals, using the average sound pressure signal as a reference sound pressure signal to reflect the overall sound pressure level of the detection area. This eliminates interference from random errors, achieving stability in the sound pressure detection data. Furthermore, replacing the traditional fixed reference sound pressure with the average sound pressure signal adapts to actual detection scenarios, avoiding judgment errors caused by inconsistencies between the reference benchmark and the actual scenario. By comparing the differences between multiple sound pressure signals and the reference sound pressure signal, sound pressure signals with differences exceeding a preset threshold are identified as abnormal sound pressure signals. The detection points corresponding to these abnormal sound pressure signals are then retested. This achieves precise quantitative representation of the sound pressure state and high efficiency in the retesting process, eliminating the need for additional screening of retesting points, shortening preparation time, and ensuring the accuracy of sound pressure detection.

[0114] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, combinations, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A sound pressure detection device, characterized in that, It includes a processing module, an automatic positioning module, and a sound pressure detection module; The processing module is electrically connected to the automatic positioning module and is used to determine the detection point information based on the spatial information of the area to be detected and send the detection point information to the automatic positioning module. The automatic positioning module is connected to the sound pressure detection module and is used to move the sound pressure detection module to the detection point according to the detection point information. The sound pressure detection module is electrically connected to the processing module and is used to detect sound pressure signals at multiple detection points and transmit the multiple sound pressure signals to the processing module. The processing module is also used to adjust the output signal of the sound source according to the multiple sound pressure signals.

2. The sound pressure detection device according to claim 1, characterized in that, The processing module is further configured to determine a reference sound pressure signal based on the plurality of sound pressure signals, and to determine, based on the plurality of sound pressure signals and the reference sound pressure signal, the retest points among the plurality of detection points that need to be retested; The processing module is further configured to, after adjusting the output signal of the sound source, control the automatic positioning module and the sound pressure detection module to detect the retest sound pressure signal at the retest point, and determine whether the retest sound pressure signal meets the sound pressure requirements based on the retest sound pressure signal and the adjusted output signal of the sound source.

3. The sound pressure detection device according to claim 1, characterized in that, The automatic positioning module includes a control unit and a rotary telescopic unit; The control unit is electrically connected to the processing module and the rotary telescopic unit respectively, and is used to receive the detection point information and control the rotation angle and telescopic distance of the rotary telescopic unit according to the detection point information.

4. The sound pressure detection device according to claim 3, characterized in that, The control unit includes an interactive interface, which is used to obtain the position information of the automatic positioning module based on the interactive interface, and to calculate the rotation angle and extension distance of the rotating telescopic unit based on the position information and the detection point information.

5. The sound pressure detection device according to claim 3, characterized in that, The control unit includes an interactive interface; the control unit is used to obtain spatial information of the area to be detected based on the interactive interface, and transmit the spatial information of the area to be detected to the processing module.

6. The sound pressure detection device according to claim 5, characterized in that, The spatial information of the area to be detected includes: the length, width, and detection interval of the area to be detected.

7. The sound pressure detection device according to claim 3, characterized in that, The automatic positioning module also includes a height adjustment unit; The control unit is also electrically connected to the height adjustment unit, and is used to control the height adjustment unit to adjust the height of the automatic positioning module according to test requirements.

8. A method for detecting sound pressure levels, characterized in that, The sound pressure detection method, applied to any one of claims 1 to 7, comprises: The detection point information is determined based on the spatial information of the area to be detected, and the detection point information is sent to the automatic positioning module so that the automatic positioning module can drive the sound pressure detection module to move to the detection point according to the detection point information. The system receives multiple sound pressure signals from the sound pressure detection module and adjusts the output signal of the sound source according to the sound pressure signals.

9. The sound pressure detection method according to claim 8, characterized in that, After receiving multiple sound pressure signals from the sound pressure detection module, the system further includes: A reference sound pressure signal is determined based on the plurality of said sound pressure signals; Based on the multiple sound pressure signals and the reference sound pressure signal, determine the retest points among the multiple detection points that need to be retested; After adjusting the output signal of the sound source according to the sound pressure signal, the method further includes: The automatic positioning module and the sound pressure detection module are controlled to detect the retest sound pressure signal at the retest point; Determine whether the remeasured sound pressure signal meets the sound pressure requirements based on the remeasured sound pressure signal and the adjusted output signal of the sound source.

10. The sound pressure detection method according to claim 9, characterized in that, Determining a reference sound pressure signal based on a plurality of the said sound pressure signals includes: The average sound pressure signal of the plurality of sound pressure signals is determined based on the plurality of sound pressure signals; The average sound pressure signal is determined as the reference sound pressure signal; Based on the multiple sound pressure signals and the reference sound pressure signal, determine the retest points among the multiple detection points that need to be retested, including: Among the multiple sound pressure signals, the sound pressure signal whose difference from the reference sound pressure signal is greater than a preset difference is identified as an abnormal sound pressure signal; The detection points corresponding to the abnormal sound pressure signals are determined as the retesting points that need to be retested.

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