Solenoid valve noise evaluation method and device

Abstract

The invention provides an electromagnetic valve noise evaluation method and device, and the method comprises the steps: obtaining a test number of a to-be-detected electromagnetic valve, and assembling the electromagnetic valve in an anechoic chamber according to a preset requirement; detecting whether the noise of the anechoic chamber meets a test condition or not; when the test conditions are met, the electromagnetic valve is controlled to be opened and closed at set frequency and voltage; sound pressure data of the electromagnetic valve in the anechoic chamber are collected; performing effective data screening and integration on the sound pressure data to obtain effective sound pressure signals; and FFT Fourier transformation is conducted on the effective sound pressure signals, and the final loudness of the electromagnetic valve is calculated according to a loudness calculation method. According to the invention, the loudness of the electromagnetic valve can be accurately and comprehensively tested, the obtained data volume is wider and more comprehensive based on the multi-directional measurement of the sound pressure data of the electromagnetic valve, and the corresponding test result is more accurate.

Description

Technical Field

[0001] The present invention relates to the field of automobile NVH technology, and in particular to a solenoid valve noise evaluation method and device. Background Art

[0002] With the rapid development of the automotive industry, the penetration rate of new energy vehicle models has become increasingly obvious. Due to the lack of engine noise coverage in stationary and low-speed sections of new energy vehicles, the NVH problem in the vehicle has gradually become more prominent, especially when electrical components are working, such as the transient impact noise emitted when the solenoid valve is opened and closed, which is extremely easy to be perceived by the driver.

[0003] In the existing technology, the noise assessment method for solenoid valves is mainly to connect the air source to the solenoid valve body and control the opening and closing of the solenoid valve to test the noise. This method has high requirements for the test site. Considering the quiet requirements of the test environment, there is no air source access in a general quiet room. At the same time, due to the access of the air source, during the noise test, the test noise results include not only the noise of the solenoid valve body, but also the air flow pulsation noise caused by the intermittent opening and closing of the solenoid valve, resulting in inaccurate results. At the same time, there is a lack of vehicle-level testing methods, and it is impossible to judge the noise level of the solenoid valve in the whole vehicle state, which is easy to misjudge in the early stage of product design. Summary of the Invention

[0004] Based on this, the purpose of the present invention is to provide a solenoid valve noise evaluation method and device to solve the above-mentioned deficiencies in the prior art.

[0005] In a first aspect, the present invention provides a method for evaluating solenoid valve noise, the method comprising:

[0006] Obtain the test number of the solenoid valve to be tested, and assemble the solenoid valve into the anechoic chamber according to preset requirements;

[0007] Detecting whether the noise in the anechoic chamber meets the test conditions;

[0008] When the test conditions are met, the solenoid valve is controlled to open and close at the set frequency and voltage;

[0009] Collecting sound pressure data of the solenoid valve in the anechoic chamber;

[0010] Perform effective data screening and integration on the sound pressure data to obtain effective sound pressure signals;

[0011] Perform FFT Fourier transformation on the effective sound pressure signal, and calculate the final loudness of the solenoid valve according to the loudness calculation method.

[0012] Furthermore, after the step of assembling the solenoid valve into the anechoic chamber according to preset requirements, the method further specifically includes:

[0013] Detecting whether the arrangement distance between the solenoid valve and several sound pressure collection devices in the anechoic chamber is within a set range;

[0014] If yes, perform sensitivity calibration on the sound pressure collection device;

[0015] The verification results are fed back to the sound pressure collection device.

[0016] Furthermore, the step of detecting whether the noise in the anechoic chamber meets the test requirements includes:

[0017] Detecting whether the noise level in the anechoic chamber is lower than a preset value;

[0018] If yes, check whether the sound pressure collection device has passed the calibration;

[0019] If the verification is qualified, the feedback test condition is qualified;

[0020] If the verification fails, the feedback test condition fails.

[0021] Furthermore, the step of collecting sound pressure data of the solenoid valve in the anechoic chamber includes:

[0022] Detecting whether the operation time of the solenoid valve is greater than a first preset value;

[0023] If yes, control the sound pressure collection device arranged in the anechoic chamber to collect sound pressure data, and record the collection time of the sound pressure collection device;

[0024] If the collection time reaches the second preset value, the sound pressure data collected by the sound pressure collection equipment is fed back to the sound pressure collection device.

[0025] Furthermore, the step of screening and integrating the sound pressure data to obtain a valid sound pressure signal includes:

[0026] Read the sound pressure data read by each sound pressure collection device each time;

[0027] The sound pressure data is synthesized and calculated to obtain a synthesized sound pressure. The synthesized sound pressure is calculated as follows:

[0028]

[0029] Among them, P 合 is the synthetic sound pressure, P 上 is the sound pressure data collected by the sound pressure collection device installed above the solenoid valve, P 下 is the sound pressure data collected by the sound pressure collection device set below the solenoid valve, P 侧 The sound pressure data is collected by the sound pressure collection device installed on the side of the solenoid valve;

[0030] Filter the effective data to obtain the effective sound pressure signal P.

[0031] Furthermore, the step of performing FFT Fourier transform on the effective sound pressure signal and calculating the final loudness of the solenoid valve according to the loudness calculation method specifically includes:

[0032] Perform FFT Fourier transform on the effective sound pressure signal P;

[0033] Read and record the loudness L of each opening and closing of the solenoid valve 开n , L 关n ;

[0034] Loudness L 开n , L 关n Perform averaging to obtain the final loudness L 开 , L 关 .

[0035] The technical solution provided by the present invention is to set up a test anechoic chamber that meets the requirements for testing the loudness of the solenoid valve, perform multi-directional loudness detection on the solenoid valve, and optimize the detected sound pressure data to obtain an effective sound pressure signal. Finally, the effective sound pressure signal is Fourier transformed to obtain the final loudness as the average value. Compared with the prior art, the beneficial effect of the present invention is that: through the solution of this application, the loudness of the solenoid valve can be accurately and comprehensively tested. Based on the multi-directional measurement of the solenoid valve sound pressure data, the amount of data obtained is more extensive and comprehensive, and the test results are correspondingly more accurate. In addition, the noise evaluation method is relatively simple, fast, and has a low testing cost. It is beneficial to provide objective and quantified noise data for the development and design of vehicle NVH improvement during the development of new energy vehicles, and is convenient for optimizing and improving the noise coefficient of the solenoid valve.

[0036] In a second aspect, the present invention further provides a solenoid valve noise evaluation device, the device comprising:

[0037] Solenoid valve information import module, used to obtain the test number of the solenoid valve to be tested;

[0038] A detection module, used to detect whether the noise in the anechoic chamber meets the test conditions;

[0039] A solenoid valve control module, used to control the solenoid valve to open and close at a set frequency and voltage;

[0040] An acquisition module, configured to acquire sound pressure data of the solenoid valve in the anechoic chamber;

[0041] A data processing module is used to effectively filter and integrate the sound pressure data to obtain a valid sound pressure signal;

[0042] The calculation module is used to perform FFT Fourier transformation on the effective sound pressure signal and calculate the final loudness of the solenoid valve according to the loudness calculation method.

[0043] Furthermore, the device further comprises:

[0044] a position detection module, configured to detect whether the arrangement distance between the solenoid valve and a plurality of sound pressure collection devices in the anechoic chamber is within a set range;

[0045] A calibration module, used to perform sensitivity calibration on the sound pressure acquisition device;

[0046] The feedback module is used to feed back the verification result to the sound pressure collection device.

[0047] Furthermore, the detection module specifically includes:

[0048] A noise monitoring unit, configured to detect whether the noise level in the anechoic chamber is lower than a preset value;

[0049] The calibration feedback unit is used to query whether the sound pressure collection device has passed the calibration; if the calibration is passed, the feedback test condition is passed; if the calibration is unqualified, the feedback test condition is unqualified.

[0050] Furthermore, the acquisition module specifically includes:

[0051] a first time detection unit, configured to detect whether the operating time of the solenoid valve is greater than a first preset value;

[0052] The acquisition start unit is used to control the sound pressure acquisition equipment arranged in the anechoic room to collect sound pressure data.

[0053] a recording unit, configured to record the acquisition time of the sound pressure acquisition device;

[0054] The data feedback detection unit is used to feed back the sound pressure data collected by the sound pressure collection device to the sound pressure collection apparatus when the collection time reaches a second preset value.

[0055] The details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0057] Figure 1 FIG. 4 is a flow chart of a solenoid valve noise evaluation method according to a first embodiment of the present invention.

[0058] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is described and illustrated below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely used to explain this application and are not intended to limit this application. Based on the embodiments provided in this application, all other embodiments obtained by those of ordinary skill in the art without making any creative efforts are within the scope of protection of this application.

[0060] Obviously, the drawings described below are merely examples or embodiments of the present application. Those skilled in the art can, without inventive effort, apply the present application to other similar scenarios based on these drawings. Furthermore, it is also understood that, although the effort involved in such a development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, changes in design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as an insufficiency of the content disclosed in this application.

[0061] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments unless there is a conflict.

[0062] Unless otherwise defined, the technical or scientific terms used in this application should have the ordinary meaning understood by a person of ordinary skill in the technical field to which this application belongs. The words "one", "a", "the" and the like used in this application do not indicate a limit on quantity and may indicate the singular or plural. The terms "include", "comprise", "have" and any variations thereof used in this application are intended to cover non-exclusive inclusions; for example, a process, method, system, product or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units that are not listed, or may also include other steps or units that are inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like used in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The word "multiple" used in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, "A and / or B" can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects before and after are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific order for the objects.

[0063] With the rapid development of the automotive industry, the penetration rate of new energy vehicle models has become increasingly obvious. Due to the lack of engine noise coverage in stationary and low-speed sections of new energy vehicles, the NVH problem in the vehicle has gradually become more prominent, especially when electrical components are working, such as the transient impact noise emitted when the solenoid valve is opened and closed, which is extremely easy to be perceived by the driver.

[0064] In the existing technology, the noise assessment method for solenoid valves is mainly to connect the air source to the solenoid valve body and control the opening and closing of the solenoid valve to test the noise. This method has high requirements for the test site. Considering the quiet requirements of the test environment, there is no air source access in a general quiet room. At the same time, due to the access of the air source, during the noise test, the test noise results include not only the noise of the solenoid valve body, but also the air flow pulsation noise caused by the intermittent opening and closing of the solenoid valve, resulting in inaccurate results. At the same time, there is a lack of vehicle-level testing methods, and it is impossible to judge the noise level of the solenoid valve in the whole vehicle state, which is easy to misjudge in the early stage of product design.

[0065] To this end, the present invention proposes a solenoid valve noise evaluation method to solve the above problem.

[0066] Example 1

[0067] See also Figure 1 , which shows a solenoid valve noise evaluation method in a first embodiment of the present invention, the method includes steps S1 to S6:

[0068] S1, obtain the test number of the solenoid valve to be tested, and assemble the solenoid valve into the anechoic chamber according to preset requirements.

[0069] It can be understood that the design purpose of the present invention is to evaluate the noise coefficient of the solenoid valve to be tested and to facilitate targeted optimization and improvement of the solenoid valve based on the noise coefficient. Therefore, it is necessary to perform specific optimization and improvement on the solenoid valve, and the improved version of the solenoid valve is marked and distinguished by a test number.

[0070] By way of example and not limitation, in an embodiment of the present invention, noise assessment is performed based on the NVH conditions of a vehicle's solenoid valve. Therefore, the specific requirements for the solenoid valve assembly within the anechoic chamber are as follows: the solenoid valve is suspended by an elastic rope, and a controller for simulating the opening and closing of the solenoid valve, such as a square wave signal controller, is connected to the solenoid valve terminal. At the same time, sound pressure collection devices are arranged equidistantly above, below, and on the sides of the solenoid valve. The solenoid valve must be at least 100 cm above the ground, and no objects other than the sound pressure collection device and related brackets should obstruct the surrounding space within 100 cm. A sound pressure collection device is arranged directly below, to the side, and above the solenoid valve, 15 ± 2 cm away from the solenoid valve, with the sound pressure collection device pointing toward the solenoid valve.

[0071] S2, detect whether the noise in the anechoic chamber meets the test conditions.

[0072] It should be explained that in order to ensure that the sound pressure data collected by the sound pressure collection device is not interfered with, in the embodiment of the present invention, it is necessary to detect whether the sound pressure value in the anechoic chamber meets the test conditions. Specifically, when the noise in the anechoic chamber is lower than 20dB, the test conditions are met.

[0073] S3, when the test conditions are met, the solenoid valve is controlled to open and close at the set frequency and voltage.

[0074] In an embodiment of the present invention, the opening and closing of the solenoid valve are controlled by a square wave signal controller connected to the connection terminal of the solenoid valve. In an embodiment of the present invention, the square wave signal controller controls the solenoid valve to realize the opening and closing functions at a frequency of 0.1 Hz (high and low levels each account for 50%) and a terminal voltage of 13.5±0.2 V.

[0075] S4, collecting sound pressure data of the solenoid valve in the anechoic chamber.

[0076] By way of example and not limitation, the sound pressure data collected by the present invention at least includes sound pressure data from sound pressure collection devices disposed directly below, on the side, and directly above the solenoid valve.

[0077] S5, performing effective data screening and integration on the sound pressure data to obtain an effective sound pressure signal.

[0078] S6, performing FFT Fourier transformation on the effective sound pressure signal, and calculating the final loudness of the solenoid valve according to the loudness calculation method.

[0079] In the embodiment of the present invention, by performing FFT Fourier transform (Fast Fourier Transform) on the effective sound pressure signal, the symmetry and periodicity of the exponential factors in the Fourier transform calculation formula are fully utilized, and then the corresponding Fourier transforms of these short sequences are obtained and appropriately combined to achieve the purpose of eliminating repeated calculations, reducing multiplication operations and simplifying the structure.

[0080] In summary, the solenoid valve noise evaluation method in the above-mentioned embodiment of the present invention sets up a test anechoic chamber that meets the requirements for testing the loudness of the solenoid valve, performs multi-directional loudness detection on the solenoid valve, and optimizes the detected sound pressure data to obtain an effective sound pressure signal. Finally, the effective sound pressure signal is Fourier transformed to obtain the final loudness as the average value. Compared with the prior art, the beneficial effect of the present invention is that the solenoid valve loudness can be accurately and comprehensively tested through the scheme of this application. Based on the multi-directional measurement of the solenoid valve sound pressure data, the amount of data obtained is more extensive and comprehensive, and the test results are correspondingly more accurate. In addition, the noise evaluation method is relatively simple, fast, and has a low testing cost. It is beneficial to provide objective and quantified noise data for the development and design of vehicle NVH improvement during the development of new energy vehicles, and is convenient for optimizing and improving the noise coefficient of the solenoid valve.

[0081] Furthermore, in an embodiment of the present invention, after the step of assembling the solenoid valve into the anechoic chamber according to preset requirements, the method further includes:

[0082] Step S21 : detecting whether the arrangement distance between the solenoid valve and the plurality of sound pressure collecting devices in the anechoic chamber is within a set range.

[0083] By way of example and not limitation, in embodiments of the present invention, distance information can be acquired by placing position sensor elements on a sound pressure acquisition device and a solenoid valve. It will be appreciated that if the placement distance is outside a set range, a deviation in the acquired sound pressure data will occur, necessitating feedback indicating an error in the placement device. This error can be corrected by providing feedback warning information.

[0084] Step S22: If yes, perform sensitivity calibration on the sound pressure collection device.

[0085] It is understandable that when the device sensitivity calibration fails, it means that there is an abnormality in the current sound pressure collection device or there is interference in the sound pickup. The sound pressure collection data under the current conditions is not accurate. An abnormal alarm can be fed back to correct the problem of the corresponding sound pressure collection device.

[0086] Step S23: Feedback the verification result to the sound pressure collection device.

[0087] In the embodiment of the present invention, the above method can eliminate the problems of equipment layout location and equipment failure itself, so as to ensure the accuracy of data obtained in noise assessment.

[0088] Furthermore, in an embodiment of the present invention, the step of detecting whether the noise in the anechoic chamber meets the test requirements specifically includes:

[0089] Step S31: Detect whether the noise level in the anechoic chamber is lower than a preset value.

[0090] By way of example and not limitation, in the embodiment of the present invention, the preset value range of the noise value is 20 dB.

[0091] Step S32: If yes, check whether the sound pressure collection device has passed the calibration.

[0092] Step S33: If the verification is qualified, the feedback test condition is qualified.

[0093] Step S34: If the verification fails, the test condition is fed back as unqualified.

[0094] Furthermore, in an embodiment of the present invention, the step of collecting sound pressure data of the solenoid valve in the anechoic chamber specifically includes:

[0095] Step S41: Detect whether the operating time of the solenoid valve is greater than a first preset value.

[0096] Among them, the specific setting time of the first preset value is 3 minutes.

[0097] Step S42: If yes, control the sound pressure collection device arranged in the anechoic chamber to collect sound pressure data, and record the collection time of the sound pressure collection device.

[0098] Step S43: If the collection time reaches the second preset value, the sound pressure data collected by the sound pressure collection equipment is fed back to the sound pressure collection device.

[0099] In this embodiment of the present invention, the second preset value is specifically set to a time of 2 minutes. By setting this time parameter, during the specific sound pressure data collection process, the solenoid valve in the collected sound pressure data has been operating for a long enough time to complete preheating, resulting in more stable and accurate data. Furthermore, the amount of data collected is also sufficient.

[0100] Furthermore, in an embodiment of the present invention, the steps of screening and integrating the sound pressure data to obtain a valid sound pressure signal include:

[0101] Step S51: Read the sound pressure data read by each sound pressure collection device each time.

[0102] Step S52: Perform synthesis calculation on the sound pressure data to obtain a synthesized sound pressure.

[0103] The synthetic sound pressure is calculated as follows:

[0104]

[0105] Among them, P 合 is the synthetic sound pressure, P 上 is the sound pressure data collected by the sound pressure collection device installed above the solenoid valve, P 下 is the sound pressure data collected by the sound pressure collection device set below the solenoid valve, P 侧 The sound pressure data is collected by the sound pressure collection device installed on the side of the solenoid valve;

[0106] Step S53: Filter the valid data to obtain a valid sound pressure signal P.

[0107] It should be noted that, in the embodiment of the present invention, the synthetic sound pressure P can be converted to 合 The information below 20Hz and above 10000Hz is filtered out, and only the signal P is retained. 合 The information of 20 to 10000 Hz is obtained, and the final effective sound pressure signal P is obtained.

[0108] Furthermore, in an embodiment of the present invention, the steps of performing FFT Fourier transform on the effective sound pressure signal and calculating the final loudness of the solenoid valve according to the loudness calculation method specifically include:

[0109] Step S61: Perform FFT Fourier transform on the effective sound pressure signal P.

[0110] Among them, FTT Fourier transform is fast Fourier transform.

[0111] Step S62: Read and record the loudness L of each opening and closing of the solenoid valve. 开n , L 关n .

[0112] Step S63: loudness L 开n , L 关n Perform averaging to obtain the final loudness L 开 , L 关 .

[0113] By way of example and not limitation, in an embodiment of the present invention, the recorded loudness data of each opening and closing of the solenoid valve is specifically shown in Table 1 below:

[0114]

[0115] Table 1 In which,

[0116]

[0117] Example 2

[0118] The present invention also provides a solenoid valve noise evaluation device, the device comprising:

[0119] Solenoid valve information import module, used to obtain the test number of the solenoid valve to be tested;

[0120] A detection module, used to detect whether the noise in the anechoic chamber meets the test conditions;

[0121] A solenoid valve control module, used to control the solenoid valve to open and close at a set frequency and voltage;

[0122] An acquisition module, configured to acquire sound pressure data of the solenoid valve in the anechoic chamber;

[0123] A data processing module is used to effectively filter and integrate the sound pressure data to obtain an effective sound pressure signal;

[0124] The calculation module is used to perform FFT Fourier transformation on the effective sound pressure signal and calculate the final loudness of the solenoid valve according to the loudness calculation method.

[0125] In some optional embodiments, the device further comprises:

[0126] The position detection module is used to detect whether the arrangement distance between the solenoid valve and the plurality of sound pressure collection devices in the anechoic chamber is within a set range.

[0127] The calibration module is used to perform sensitivity calibration on the sound pressure acquisition device.

[0128] The feedback module is used to feed back the verification result to the sound pressure collection device.

[0129] In some optional embodiments, the detection module specifically includes:

[0130] A noise monitoring unit, configured to detect whether the noise level in the anechoic chamber is lower than a preset value;

[0131] The calibration feedback unit is used to query whether the sound pressure collection device has passed the calibration; if the calibration is passed, the feedback test condition is passed; if the calibration is unqualified, the feedback test condition is unqualified.

[0132] In some optional embodiments, the acquisition module specifically includes:

[0133] a first time detection unit, configured to detect whether the operating time of the solenoid valve is greater than a first preset value;

[0134] The acquisition start unit is used to control the sound pressure acquisition equipment arranged in the anechoic room to collect sound pressure data.

[0135] a recording unit, configured to record the acquisition time of the sound pressure acquisition device;

[0136] The data feedback detection unit is used to feed back the sound pressure data collected by the sound pressure collection device to the sound pressure collection apparatus when the collection time reaches a second preset value.

[0137] In some optional embodiments, the data processing module 25 includes:

[0138] Data acquisition unit: used to read the sound pressure data read by each sound pressure acquisition device each time.

[0139] Synthesis unit: used to perform synthesis calculation on the sound pressure data to obtain the synthesized sound pressure.

[0140] The synthetic sound pressure is calculated as follows:

[0141]

[0142] Among them, P 合 is the synthetic sound pressure, P 上 is the sound pressure data collected by the sound pressure collection device installed above the solenoid valve, P 下 is the sound pressure data collected by the sound pressure collection device set below the solenoid valve, P 侧 The sound pressure data is collected by the sound pressure collection device installed on the side of the solenoid valve;

[0143] Filtering unit: used to filter effective data to obtain effective sound pressure signal P.

[0144] The solenoid valve noise evaluation device provided in the second embodiment of the present invention has the same implementation principle and technical effects as those of the aforementioned method embodiment. For the sake of brief description, for matters not mentioned in the device embodiment, reference can be made to the corresponding content in the aforementioned method embodiment.

[0145] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0146] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A solenoid valve noise evaluation method, characterized in that: The method comprises: Obtain the test number of the solenoid valve to be tested, and assemble the solenoid valve into the anechoic chamber according to preset requirements; Detecting whether the noise in the anechoic chamber meets the test conditions; When the test conditions are met, the solenoid valve is controlled to open and close at the set frequency and voltage; Collecting sound pressure data of the solenoid valve in the anechoic chamber; Perform effective data screening and integration on the sound pressure data to obtain effective sound pressure signals; Perform FFT Fourier transformation on the effective sound pressure signal, and calculate the final loudness of the solenoid valve according to the loudness calculation method.

2. The electromagnetic valve noise evaluation method according to claim 1, characterized in that: After the step of assembling the solenoid valve into the muffler chamber according to preset requirements, the following steps are further specifically included: Detecting whether the arrangement distance between the solenoid valve and several sound pressure collection devices in the anechoic chamber is within a set range; If yes, perform sensitivity calibration on the sound pressure collection device; The verification result is fed back to the sound pressure collection device.

3. The electromagnetic valve noise evaluation method according to claim 1, characterized in that: The step of detecting whether the noise in the anechoic chamber meets the test requirements comprises: Detecting whether the noise level in the anechoic chamber is lower than a preset value; If yes, check whether the sound pressure collection device has passed the calibration; If the verification is passed, the feedback test condition is passed; If the verification fails, the feedback test condition fails.

4. The electromagnetic valve noise evaluation method according to claim 1, characterized in that: The step of collecting the sound pressure data of the solenoid valve in the anechoic chamber includes: Detecting whether the operation time of the solenoid valve is greater than a first preset value; If yes, control the sound pressure collection device arranged in the anechoic chamber to collect sound pressure data, and record the collection time of the sound pressure collection device; If the collection time reaches the second preset value, the sound pressure data collected by the sound pressure collection equipment is fed back to the sound pressure collection device.

5. The electromagnetic valve noise evaluation method according to claim 1, characterized in that: The steps of screening and integrating the sound pressure data to obtain a valid sound pressure signal include: Read the sound pressure data read by each sound pressure collection device each time; The sound pressure data is synthesized and calculated to obtain a synthesized sound pressure. The synthesized sound pressure is calculated as follows: Among them, P 合 is the synthetic sound pressure, P 上 is the sound pressure data collected by the sound pressure collection device installed above the solenoid valve, P 下 is the sound pressure data collected by the sound pressure collection device set below the solenoid valve, P 侧 The sound pressure data is collected by the sound pressure collection device installed on the side of the solenoid valve; Filter the effective data to obtain the effective sound pressure signal P.

6. The electromagnetic valve noise evaluation method according to claim 5, characterized in that: The step of performing FFT Fourier transformation on the effective sound pressure signal and calculating the final loudness of the solenoid valve according to the loudness calculation method specifically includes: Perform FFT Fourier transform on the effective sound pressure signal P; Read and record the loudness L of each opening and closing of the solenoid valve 开n , L 关n ; Loudness L 开n , L 关n Perform averaging to obtain the final loudness L 开 , L 关 .

7. A solenoid valve noise evaluation device, characterized in that: The device comprises: Solenoid valve information import module, used to obtain the test number of the solenoid valve to be tested; A detection module, used to detect whether the noise in the anechoic chamber meets the test conditions; A solenoid valve control module, used to control the solenoid valve to open and close at a set frequency and voltage; An acquisition module, configured to acquire sound pressure data of the solenoid valve in the anechoic chamber; A data processing module is used to effectively filter and integrate the sound pressure data to obtain an effective sound pressure signal; The calculation module is used to perform FFT Fourier transformation on the effective sound pressure signal and calculate the final loudness of the solenoid valve according to the loudness calculation method.

8. The solenoid valve noise evaluation device according to claim 7, characterized in that: The device further comprises: a position detection module, configured to detect whether the arrangement distance between the solenoid valve and a plurality of sound pressure collection devices in the anechoic chamber is within a set range; A calibration module, used to perform sensitivity calibration on the sound pressure acquisition device; The feedback module is used to feed back the verification result to the sound pressure collection device.

9. The solenoid valve noise evaluation device according to claim 7, characterized in that: The detection module specifically includes: A noise monitoring unit, configured to detect whether the noise level in the anechoic chamber is lower than a preset value; The calibration feedback unit is used to query whether the sound pressure collection device has passed the calibration; if the calibration is passed, the feedback test condition is passed; if the calibration is unqualified, the feedback test condition is unqualified.

10. The electromagnetic valve noise evaluation device according to claim 7, characterized in that: The acquisition module specifically includes: a first time detection unit, configured to detect whether the operating time of the solenoid valve is greater than a first preset value; The acquisition start unit is used to control the sound pressure acquisition equipment arranged in the anechoic room to collect sound pressure data. a recording unit, configured to record the acquisition time of the sound pressure acquisition device; The data feedback detection unit is used to feed back the sound pressure data collected by the sound pressure collection device to the sound pressure collection apparatus when the collection time reaches a second preset value.

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