CN113076656B - Method for testing, analyzing and evaluating starting noise of automobile fluid pump - Google Patents
Method for testing, analyzing and evaluating starting noise of automobile fluid pump Download PDFInfo
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Abstract
The invention discloses a test analysis evaluation method for starting noise of an automobile fluid pump, which is implemented by carrying out motion time domain decomposition in the starting process of the automobile fluid pump; formulating and selecting test evaluation and subjective evaluation conditions to obtain corresponding test evaluation parameters and subjective evaluation parameters; and comparing the test evaluation parameters with the subjective evaluation parameters, and evaluating the noise tone quality by using the consistency of the test evaluation parameters and the subjective evaluation parameters. The invention relates to a test evaluation method for fluid pump starting noise under vehicle conditions, which mainly solves the problem that the normalized test evaluation method for the starting noise of the automobile fluid pump actually carried under the vehicle conditions is lacked, meets the unification of subjective and objective evaluation of the fluid pump under the vehicle application conditions, directly represents the complaint of the hearing sense of a customer by using the test evaluation method to the maximum extent, and quantifies the performance index of the starting noise.
Description
Technical Field
The invention relates to the technical field of noise detection, in particular to a method for testing, analyzing and evaluating starting noise of an automobile fluid pump.
Background
The automobile fluid pump is a fluid machine suitable for automobile electric appliances, generally comprises a small rotary structural pump body such as an automobile air conditioner compressor, an oil pump, a chilled water pump, an air compressor and the like, has the main functions of fluid compression, fluid delivery and other practical use functions, is assembled in a high-temperature and strong-vibration road in an automobile engine cabin and an electromagnetic use environment in which electronic electric appliances are concentrated, frequently generates starting noise complaints, reduces the quality of automobile comfort design, seriously even causes the loss of the functions of the automobile electric appliances,
meanwhile, compared with a fuel automobile, the background noise on the new energy automobile has more strict requirements on the whole automobile noise, and the requirements on the working noise of electronic mechanical parts in a whole automobile system are increasingly strict, the evaluation mode is not limited to a single-frequency single-noise limit value, and the sound quality requirement under a silent background is also considered, so that the requirements on the noise of starting and stopping the fluid pump are strict, the noise characteristic evaluation dimension is wider, and therefore, the evaluation on the noise of the fluid pump of the new energy automobile and the guarantee of high-quality comfort are of great significance. The invention provides a method for testing, analyzing and evaluating the starting noise of an automobile fluid pump.
Disclosure of Invention
The invention aims to provide a test analysis and evaluation method for the starting noise of an automobile fluid pump, and aims to solve the problem that a standardized test evaluation method for the starting noise of the automobile fluid pump actually carried under vehicle conditions is missing.
In order to achieve the purpose, the invention adopts a method for testing, analyzing and evaluating the starting noise of the automobile fluid pump, which comprises the following steps:
carrying out motion time domain decomposition in the starting process of the automobile fluid pump;
formulating and selecting test evaluation and subjective evaluation conditions to obtain corresponding test evaluation parameters and subjective evaluation parameters;
and comparing the test evaluation parameters with the subjective evaluation parameters, and evaluating the sound quality of the noise by using the consistency of the test evaluation parameters and the subjective evaluation parameters.
In the step of formulating and selecting test evaluation and subjective evaluation conditions to obtain corresponding test evaluation parameters and subjective evaluation parameters, the formulating and selecting test evaluation specifically comprises the following steps:
judging the type of the automobile fluid pump;
judging a working medium of the automobile fluid pump;
and judging the working function of the automobile fluid pump.
In the step of formulating and selecting test evaluation and subjective evaluation conditions to obtain corresponding test evaluation parameters and subjective evaluation parameters, the formulation and selection of subjective evaluation specifically comprises the following steps:
setting an evaluation group of auditory subjective persons;
setting subjective evaluation specifications;
establishing a subjective evaluation parameter item, and drawing up a subjective evaluation table based on the subjective evaluation standard;
and obtaining subjective evaluation parameters according to the subjective evaluation table.
Wherein, judge the automobile fluid pump type, specifically do:
judging whether the fluid pump is an electrically driven fluid pump or a fuel automobile air conditioner compressor;
if the working medium is electrically driven, judging the working medium of the automobile fluid pump;
and if the automobile air conditioner compressor is the fuel automobile air conditioner compressor, evaluating the suction noise of the clutch, and then judging the working medium of the automobile fluid pump.
Wherein, judge the working medium of car fluid pump, specifically be:
the media differential design according to the operation of the fluid pump is classified as: refrigerant media and non-refrigerant media.
Wherein, judge the work function of car fluid pump, specifically do:
the fluid pump is classified into a boil-off gas compression fluid pump and a fluid medium transfer fluid pump according to the function of the fluid pump.
Wherein, the start-up noise test condition of boil-off gas compression fluid pump has two kinds, and one kind is: starting noise test evaluation at high temperature and high speed and at high temperature and low speed; the other is as follows: and starting noise test evaluation at a high temperature and a low speed after long-term storage and at a low temperature and a low speed after long-term storage.
Wherein the fluid medium transfer fluid pump has two start-up noise test conditions, one of which is: testing and evaluating the high-temperature starting noise; the other is as follows: and (5) low-temperature starting noise test evaluation.
The method comprises the following steps of establishing and selecting test evaluation and subjective evaluation conditions to obtain corresponding test evaluation parameters and subjective evaluation parameters:
and combining the starting noise test of the evaporation gas compression fluid pump with the starting noise test of the fluid medium transmission fluid pump to obtain noise vibration test evaluation parameters.
Comparing the test evaluation parameters with the subjective evaluation parameters, and evaluating the sound quality of the noise by using the consistency of the test evaluation parameters and the subjective evaluation parameters, wherein the method specifically comprises the following steps:
comparing the noise vibration test evaluation parameters with the subjective evaluation parameters, judging whether the parameters are consistent, and if so, evaluating the noise tone quality; and if the answer is not consistent, performing listening and vibration subjective evaluation to obtain listening and vibration subjective evaluation parameters, inputting the listening and vibration subjective evaluation parameters into the test evaluation parameters, and comparing the listening and vibration subjective evaluation parameters with the subjective evaluation parameters again until the listening and vibration subjective evaluation parameters are consistent.
The invention has the advantages that: motion time domain decomposition is carried out in the starting process of the automobile fluid pump; formulating and selecting test evaluation and subjective evaluation conditions to obtain corresponding test evaluation parameters and subjective evaluation parameters; and comparing the test evaluation parameters with the subjective evaluation parameters, and evaluating the sound quality of the noise by using the consistency of the test evaluation parameters and the subjective evaluation parameters. The invention relates to a test evaluation method for fluid pump starting noise under vehicle conditions, which mainly solves the problem that the normalized test evaluation method for the starting noise of the automobile fluid pump actually carried under the vehicle conditions is lacked, meets the unification of subjective and objective evaluation of the fluid pump under the vehicle application conditions, directly represents the complaint of the hearing sense of a customer by using the test evaluation method to the maximum extent, and quantifies the performance index of the starting noise.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of an analysis and evaluation method for testing the starting noise of an automotive fluid pump according to the present invention.
FIG. 2 is a flow chart of the test evaluation of the present invention.
Fig. 3 is a noise cloud of the present invention.
Fig. 4 is a graph showing the results of fluid pump startup noise data according to the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1 to 4, the present invention provides a method for testing, analyzing and evaluating the starting noise of a fluid pump of an automobile, comprising the following steps:
carrying out motion time domain decomposition in the starting process of the automobile fluid pump;
formulating and selecting test evaluation and subjective evaluation conditions to obtain corresponding test evaluation parameters and subjective evaluation parameters;
and comparing the test evaluation parameters with the subjective evaluation parameters, and evaluating the sound quality of the noise by using the consistency of the test evaluation parameters and the subjective evaluation parameters.
In the step of formulating and selecting test evaluation and subjective evaluation conditions to obtain corresponding test evaluation parameters and subjective evaluation parameters, the formulating and selecting test evaluation specifically comprises the following steps:
judging the type of the automobile fluid pump;
judging a working medium of the automobile fluid pump;
and judging the working function of the automobile fluid pump.
In the step of formulating and selecting test evaluation and subjective evaluation conditions to obtain corresponding test evaluation parameters and subjective evaluation parameters, the formulation and selection of subjective evaluation specifically comprises the following steps:
setting an evaluation group of auditory subjective persons;
setting subjective evaluation specifications;
establishing a subjective evaluation parameter item, and drawing up a subjective evaluation table based on the subjective evaluation criterion;
and obtaining subjective evaluation parameters according to the subjective evaluation table.
Judging the type of the automobile fluid pump, specifically:
judging whether the fluid pump is an electrically driven fluid pump or a fuel automobile air conditioner compressor;
if the vehicle fluid pump is electrically driven, judging a working medium of the vehicle fluid pump;
and if the automobile air conditioner compressor is the fuel automobile air conditioner compressor, evaluating the suction noise of the clutch, and then judging the working medium of the automobile fluid pump.
Judging the working medium of the automobile fluid pump, which specifically comprises the following steps:
the media difference design according to the operation of the fluid pump is classified as: refrigerant media and non-refrigerant media.
Judging the working function of the automobile fluid pump, specifically:
the fluid pump is classified into a boil-off gas compression fluid pump and a fluid medium transfer fluid pump according to the function of the fluid pump.
The starting noise test conditions of the evaporation gas compression fluid pump are two, one is as follows: starting noise test evaluation at high temperature and high speed and at high temperature and low speed; the other is as follows: and (4) starting noise test evaluation at a high temperature and a low speed after long-term storage and at a low temperature and a low speed after long-term storage.
The fluid medium transmission fluid pump has two starting noise test conditions, one is as follows: testing and evaluating the high-temperature starting noise; the other is as follows: and (5) evaluating a low-temperature starting noise test.
In the step of formulating and selecting test evaluation and subjective evaluation conditions to obtain corresponding test evaluation parameters and subjective evaluation parameters:
and combining the starting noise test of the evaporation gas compression fluid pump with the starting noise test of the fluid medium transmission fluid pump to obtain noise vibration test evaluation parameters.
Comparing the test evaluation parameters with the subjective evaluation parameters, and evaluating the sound quality of the noise by using the consistency of the test evaluation parameters and the subjective evaluation parameters, wherein the method specifically comprises the following steps:
comparing the noise vibration test evaluation parameters with the subjective evaluation parameters to judge whether the parameters are consistent, and if so, evaluating the noise tone quality; and if the answer is not consistent, performing listening and vibration subjective evaluation to obtain listening and vibration subjective evaluation parameters, inputting the listening and vibration subjective evaluation parameters into the test evaluation parameters, and comparing the listening and vibration subjective evaluation parameters with the subjective evaluation parameters again until the listening and vibration subjective evaluation parameters are consistent.
The method for testing, analyzing and evaluating the starting noise of the automobile fluid pump further comprises the step of arranging test points, wherein the test points comprise a noise test point, a vibration test point and a fluid pressure test point.
The step of comparing the test evaluation parameters with the subjective evaluation parameters further comprises: collecting noise vibration data information; carrying out audio playback on the acquired data, and carrying out overall starting noise comparison and confirmation on the acquired data and the listening feeling of synchronous subjective appraisers during acquisition;
if the characteristics of the whole starting noise cannot be distinguished in the process, a vibration listening device is required to be introduced for subjective identification and evaluation, noise data at the stethoscope end is synchronously recorded, on the basis, time domain signal comparison and analysis are carried out on the collected data, identification is carried out in the time domain signals according to the working step-by-step motion characteristics of the fluid pump, and the characteristic noise in the starting noise is further identified by combining audio playback and filtering playback, so that the consistency of the subjective evaluation and the data characteristics such as noise is achieved, namely the consistency of the listening sensation and the noise amplitude characteristics in time sequence. And finally, outputting analysis results of a total value, a narrow-band noise time domain curve and a noise time domain cloud chart according to the confirmed signal data of the consistent noise and the like.
Wherein, the total noise is calculated according to the frequency range of 20-20000Hz, and the frequency range of the narrow-band noise is calculated according to 20-2000 Hz.
In the embodiment, the automotive fluid pump is a mechanical and electrical integrated performance control functional device and is widely applied to vehicles. The working technology of the fluid pump is characterized in that energy is provided by a vehicle power unit and is input into the fluid pump to rotate, and then a medium in a vehicle subsystem is conveyed or compressed through a pump structure, so that the system functions of fluid medium flowing and flowing control, energy conversion or cold-heat transfer are realized. In order to approximate the presentation and representation of the actual noise problem of the automobile user, the test evaluation in the invention is carried out in the vehicle system environment for the test and evaluation of the starting noise.
Wherein, the environment requires a semi-anechoic chamber of the whole vehicle or a mute environment condition lower than the measured noise by less than 10dBA, such as a quiet open field recommended. Testing the instrument requirements: the test instrument comprises a multi-channel noise vibration signal test acquisition instrument, wherein the acquisition channel acquires signals with bandwidth more than 50kHz and dynamic signal range: more than 120dB, a microphone sensor with a frequency response range of 20-20000Hz and a dynamic signal range of more than 100dB, a vibration sensor with a frequency response range of 0-5000Hz and an acceleration amplitude range of more than 0-500 g; the response time of the photoelectric rotation speed sensor is less than 10 mu s. Testing the requirements of the sample car: the vehicle is a design-shaped sample vehicle or a mass-production vehicle, and has installation and system environment conditions related to the working of the fluid pump, the automobile fluid pump can work normally, and the load conditions of design and use meet the use requirements. Testing the requirements of the sample piece: the invention takes the evaporation compression type compressor in the automobile fluid pump as a main exposition object, the preparation of the sample piece needs to be a design and shaping product or a mass product, the actual use conditions of the automobile can be met, the suction can be realized, the compressor can be driven, and the like.
The key point of the invention is that four pump types, namely an automobile air conditioner compressor, a cooling water pump, an oil pump and an air compressor, are uniformly defined as automobile fluid pumps according to the pump attributes under the framework of a new energy automobile heat management system, the fluid pumps have similar applications in terms of configuration and function principle, and meanwhile, fluid pump products as the new energy automobile heat management system are mutually cooperated to work under the integrated control of the heat management system, the noise vibration problem is also mutually influenced, so that potential vehicle comfort risks are caused, especially the noise influence of each fluid pump in the working start-up stage, and a correspondingly refined test evaluation method is lacked at present;
the invention designs the testing and evaluating method of the starting noise of the fluid machinery from the aspect of noise comfort of consumers, considers the design of a method with the consistency of subjective auditory evaluation and testing analysis evaluation, simultaneously carries out the transmission analysis design of starting excitation on different fluid pump configurations, and strives to refine the time domain frequency domain amplitude signal representation of the noise vibration in the starting stage while evaluating.
Motion time domain decomposition is carried out in the starting process of the automobile fluid pump:
the current main fluid pump configurations of the new energy automobile comprise a rotary vane type, a vortex type, a piston type and a centrifugal type, wherein a driving control mode mainly comprises electric driving, and excitation characteristics of a starting process are decomposed according to 3 typical pump configurations;
the starting process of the belt-driven rotary vane compressor comprises the following steps: the process comprises the following steps of armature actuation, spline transmission, rotor rotation, blade collision and unstable refrigerant compression, wherein the phenomena of vibration noise such as armature actuation, mechanical collision and friction of a blade cylinder body, vapor-liquid phase flow of a refrigeration medium, fluid-solid coupling and the like can occur in the process;
the starting process of the electrically-driven scroll compressor comprises the following steps: the method comprises the following steps of motor electromagnetic force loading, rotating shaft transmission, movable disc rotation and unstable refrigerant compression, wherein the phenomena of electromagnetic force loading electromagnetic noise, mechanical collision and friction between the movable disc and a static disc, vapor-liquid phase flow of a refrigeration medium, fluid-solid coupling and other vibration noise can occur in the process;
the starting process of the electric centrifugal water pump comprises the following steps: the phenomena of electromagnetic force loading, rotating shaft transmission, centrifugal impeller rotation and medium initial transmission of the motor can occur, electromagnetic noise is loaded by the electromagnetic force, the centrifugal impeller and cooling liquid are stirred and flow, and the impeller is air-bound and vibrates and generates noise.
The test evaluation conditions were:
the design of the difference of the working media of the fluid pump is classified into 2 categories of refrigerant media and non-refrigerant media, and the functions of the pump body work are also classified into 2 categories of evaporative gas compression and fluid medium transmission.
The starting noise test conditions of the evaporation gas compression type fluid pump are 2, and one is the starting noise test evaluation under high temperature and high speed and high temperature and low speed; one is the evaluation of the starting noise test at a high temperature and a low speed and at a low temperature and a low speed after a long time (generally over 12 hours). The test was carried out with the high temperature region set at 40 degrees in the environment and the low temperature set at 5 or-30 degrees, and the high speed, i.e., set at 2 rpm points of 2000rpm and 3000rpm of the engine speed. The setting of the environmental temperature and the rotating speed is set according to the starting noise test working condition under the condition that the actual vehicle has more starting functions, for example, the low-temperature starting temperature of an air conditioner compressor of the fuel automobile is about 5 ℃, and the environmental temperature of the low-temperature starting of a heat pump of a new energy automobile meets the requirement of-30 ℃ in the domestic climate environment, so the setting is referred.
The starting noise test conditions of the medium transmission fluid pump are only 2 high and low temperatures, the high temperature is set at 50-60 ℃, the low temperature is set at-30 ℃, and the medium transmission fluid pump above is set according to the vehicle environmental adaptability.
The subjective evaluation conditions are as follows: aiming at the characteristics of related complex conditions and actual evaluation in the starting process of the automobile fluid pump, the characteristics of instability, large variation of sound quality and auditory sensation of noise and the like of the starting noise of the fluid pump, the designed subjective evaluation method comprises the following steps:
in the design of a subjective appraiser group, the number of people is generally more than 5, according to the user requirements related to the actual comfort of the automobile in use, the subjective appraiser is firstly ensured to have certain technical specialties and general consumption and use experiences of the automobile, and the comfort requirement expectation can be extracted. In addition to being familiar with noise process characteristics, there is a certain technical experience with the manner and principles of thermal management system control for vehicles.
After the content of a subjective evaluation table is graded, the noise tone quality description of the time sequence of functional decomposition of the fluid pump is distinguished by subjectively confirming and evaluating the starting noise tone quality, next, the noise tone quality is evaluated from the consistency check result of subjective audibility and test evaluation by comparing the time domain signal amplitude and the time of the test starting noise with the digital filtering and playback of synchronous recording data, and the time sequence of the audibility is generally inconsistent when the audibility and the test data result are inconsistent.
The transmitted starting noise time sequence characteristics and the tone quality characteristics of the electronic stethoscope are compared and confirmed by the sound perception of the compressor surface vibration sensor, and the quantized specific surface vibration magnitude is used as a vibration test evaluation result to form a consistent quantized data evaluation result with a subsequent test starting noise result, so that the transmission of the consistency result of subjective evaluation is ensured, and the evaluation reliability is high.
The test evaluation is a process of quantitative test evaluation and analysis of the starting noise by adopting a precise sensor system, and has the characteristic of high evaluation accuracy.
For test point placement:
the noise test points are respectively distributed with a microphone sensor at the right side of ears of a driver and a co-driver seat so as to test the starting noise performance in the cabin, a microphone is distributed at the position of a noise test point outside the vehicle 3-5 cm away from the fluid pump, and the noise test evaluation outside the vehicle is carried out at the position which is about 10cm away from the central point of the left wheel or the right wheel of the vehicle head.
The vibration test points are distributed at 3 positions of the inlet end, the outlet end and the surface of the pump body of the fluid pump, the sensor is adhered to the surface of a solid by adopting a 3-direction acceleration sensor, and the acceleration mass must be less than 1/10 of the mass of the measured object so as to prevent the mass of the sensor and the mass of the measured object from forming interference on vibration representation.
The fluid pressure measuring points are distributed on pipelines at the inlet and the outlet of the fluid pump;
the rotating speed of the fluid pump is tested by adopting a photoelectric sensor;
start-up noise test analysis
According to the steps in fig. 1, noise data is collected within 30 seconds of starting, and for abnormal noise occurring beyond 30 seconds, the collection of the noise data needs to be prolonged, or the machine is disassembled for inspection.
In the aspect of data analysis and evaluation, according to the figure 2, firstly, under the condition of a whole vehicle test, audio playback is carried out on acquired data, integral starting noise is compared and confirmed with the hearing of synchronous subjective evaluators during acquisition, acquisition and subjective hearing evaluation are simultaneously carried out on the data inside and outside the vehicle, if the characteristics of the integral starting noise cannot be distinguished in the process, a listening device is required to be introduced for subjective identification and evaluation, noise data at a stethoscope end is synchronously recorded, secondly, on the basis, time domain signal comparison and analysis are carried out on the acquired data, identification is carried out in a time domain signal according to the working step motion characteristics of a fluid pump (for example, instantaneous broadband peak noise can be presented by mechanical collision, broadband noise characteristics can be presented by friction or airflow noise, and the like), and the characteristic noise in the starting noise is further identified by combining the audio playback and filtering playback, so that the subjective evaluation and the data characteristics of the noise and the like have consistency, namely, the hearing and the noise amplitude characteristics are consistent in time sequence. And finally, analyzing and outputting a total value, a narrow-band noise time-domain curve, a noise time-domain cloud chart and the like according to the confirmed signal data of noise and the like with good consistency, wherein the total value noise is calculated according to the frequency range of 20-20000Hz, the frequency range of the narrow-band noise is calculated according to 20-2000Hz, and the frequency dereferencing range of the narrow band can be adjusted according to the distributed motion excitation frequency characteristic in the starting stage of the fluid pump.
In summary, the following steps: the invention relates to a test evaluation method for fluid pump starting noise under vehicle conditions, which mainly solves the problem that the normalized test evaluation method for the starting noise of the automobile fluid pump actually carried under the vehicle conditions is lacked, meets the unification of subjective and objective evaluation of the fluid pump under the vehicle application conditions, directly represents the complaint of the hearing sense of a customer by using the test evaluation method to the maximum extent, and quantifies the performance index of the starting noise. The invention meets the technical capability requirements of the whole comfort of the new energy automobile on the noise identification, analysis and evaluation of automobile fluid pump parts. The invention takes the automobile fluid pump as an analysis basis, refines the test verification analysis technical means of type, commonality and universalization in the automobile parts, can be widely popularized and applied in the products of the type, and is beneficial to breaking through the evaluation problem in the technical upgrade of the automobile parts.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (1)
1. The method for testing, analyzing and evaluating the starting noise of the automobile fluid pump is characterized by comprising the following steps of:
carrying out motion time domain decomposition in the starting process of the automobile fluid pump;
formulating and selecting test evaluation and subjective evaluation conditions to obtain corresponding test evaluation parameters and subjective evaluation parameters, which specifically comprises the following steps:
judging the type of the automobile fluid pump, specifically: judging whether the fluid pump is an electrically driven fluid pump or a fuel automobile air conditioner compressor; if the vehicle fluid pump is electrically driven, judging a working medium of the vehicle fluid pump; if the automobile air conditioner compressor is the fuel automobile air conditioner compressor, clutch suction noise evaluation is carried out, and then working media of an automobile fluid pump are judged;
judging the working medium of the automobile fluid pump, specifically: the media differential design according to the operation of the fluid pump is classified as: refrigerant media and non-refrigerant media;
judging the working function of the automobile fluid pump, specifically: the function of the fluid pump is divided into an evaporation gas compression fluid pump and a fluid medium transmission fluid pump;
setting an evaluation group of auditory subjective persons;
setting subjective evaluation specifications;
establishing a subjective evaluation parameter item, and drawing up a subjective evaluation table based on the subjective evaluation criterion;
obtaining subjective evaluation parameters according to the subjective evaluation table;
the starting noise test conditions of the evaporation gas compression fluid pump are two, one is as follows: starting noise test evaluation at high temperature and high speed and at high temperature and low speed; the other is as follows: starting noise test evaluation at a high temperature and a low speed after long-term storage and at a low temperature and a low speed after long-term storage; the fluid medium transmission fluid pump has two starting noise test conditions, one is as follows: testing and evaluating the high-temperature starting noise; the other is as follows: low-temperature starting noise test evaluation;
combining the starting noise test of the evaporation gas compression fluid pump with the starting noise test of the fluid medium transmission fluid pump to obtain noise vibration test evaluation parameters;
comparing the test evaluation parameters with the subjective evaluation parameters, and evaluating the sound quality of the noise by using the consistency of the test evaluation parameters and the subjective evaluation parameters, wherein the method specifically comprises the following steps:
comparing the noise vibration test evaluation parameters with the subjective evaluation parameters, judging whether the parameters are consistent, and if so, evaluating the noise tone quality; and if the answer is inconsistent, carrying out listening and shaking subjective evaluation to obtain listening and shaking subjective evaluation parameters, then inputting the listening and shaking subjective evaluation parameters into the test evaluation parameters, and comparing the listening and shaking subjective evaluation parameters with the subjective evaluation parameters again until the answer is consistent.
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