CN110927345B - Odor testing method for automotive interior trim part - Google Patents
Odor testing method for automotive interior trim part Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000013027 odor testing Methods 0.000 title description 5
- 238000012360 testing method Methods 0.000 claims abstract description 82
- 238000011156 evaluation Methods 0.000 claims abstract description 63
- 230000008859 change Effects 0.000 claims abstract description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 17
- 239000007789 gas Substances 0.000 claims description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 5
- 238000011010 flushing procedure Methods 0.000 claims description 4
- 238000002203 pretreatment Methods 0.000 claims description 3
- 238000004088 simulation Methods 0.000 claims description 3
- 229910001873 dinitrogen Inorganic materials 0.000 claims 1
- 206010034018 Parosmia Diseases 0.000 abstract 1
- 230000035943 smell Effects 0.000 description 43
- 230000008569 process Effects 0.000 description 6
- 238000005034 decoration Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 3
- 230000002452 interceptive effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000010009 beating Methods 0.000 description 1
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- 239000011521 glass Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
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- G01N33/0001—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00 by organoleptic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
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Abstract
The invention discloses a method for testing the smell of an automotive interior part, which comprises the following steps: step 1: the method comprises the steps that a vehicle is placed in various weathers in a real vehicle collection mode, the time-varying curve of the temperature of an interior trim part in the vehicle is measured and recorded, and a temperature variation database of the interior trim part in one day under different weather environments is formed; step 2: determining a time-varying curve of the temperature corresponding to the weather environment required by the interior trim part to be tested according to the data in the database in the step 1; and step 3: and (3) testing the interior trim part to be tested according to the temperature change curve along with time in the step (2) and performing subjective evaluation on the smell. The invention has the advantages that: the smell test is more reasonable and scientific, the smell change of the interior trim part can be accurately tested, and a host factory can improve and correct the smell of the interior trim part conveniently to provide data support; the test accords with the temperature state when actual whole car moves more, can more rationally accurately confirm the smell that gives off of interior trim part.
Description
Technical Field
The invention relates to the field of automobile odor test detection and test, in particular to an automobile interior trim part odor test evaluation method.
Background
With the further development of the domestic automobile industry, consumers pay more and more attention to the safety performance of automobiles, and in the past, the consumers mainly regard automobiles as transportation means, and the automobiles become mobile places which consume most time except for homes of many consumers nowadays, so that the requirements of the consumers on the automobiles are no longer only met for convenience of traveling, and the health care is increasing. In particular, the problem of air quality in the vehicle is more and more concerned by users, few consumers send the vehicle to a detection mechanism to detect harmful substances in the vehicle, but the odor in the vehicle is the most direct subjective feeling of the consumers, and the large odor in the vehicle inevitably causes the complaints of the consumers. At present, all major host plants control the smell of the whole vehicle, wherein the development of the smell test is an essential link in the smell development process.
At present, most of the odor test standards of the host factory are from German VDA270, 1L or 3L glass odor bottles are adopted in the VDA270, odor tests are respectively carried out at 23 ℃, 40 ℃ and 80 ℃, and the odor emission conditions of automobiles in indoor temperature, outdoor temperature and high-temperature environments are simulated. According to the method, a certain proportion of all interior trim parts is intercepted at the fixed 3 temperature points for testing, but the temperatures of different interior trim parts in an actual vehicle at the same moment are different, and the smell in the vehicle is a result of mixing smells emitted by different interior trim parts at different temperatures at the same moment, so that the test result is difficult to truly reflect the real condition of the smell in the vehicle. For interior parts such as carpets and the like which are not directly irradiated by sunlight, the test is carried out at the environment temperature of 80 ℃, if the test result is unqualified, testers can easily think that the carpet is an important source of peculiar smell in the vehicle, but the actual condition is that the temperature of the carpet in the vehicle rarely reaches 80 ℃, and misjudgment is easily caused by adopting the high test temperature. The test temperature is set to be 80 ℃ for the interior trim parts directly irradiated by sunlight, such as instrument panels and the like, if the test result is qualified, the interior trim parts are also judged as non-peculiar smell sources by experimenters, but the actual condition is that the temperature of the interior trim parts directly irradiated by the sunlight, such as the instrument panels and the like, possibly exceeds 80 ℃ under the condition of direct sunlight in summer, and if the test is still carried out at 80 ℃, the real emission condition of the interior trim parts in a vehicle is hardly reflected.
In summary, in the evaluation method of the prior art, all interior parts are tested at three temperature points of 23 ℃, 40 ℃ and 80 ℃, no test is carried out according to the actual temperature of the interior part, and the test result cannot reflect the actual air quality in the vehicle.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for testing the smell of an automotive interior part, which realizes the smell test according to the actual temperature change condition.
In order to achieve the purpose, the invention adopts the technical scheme that: an automobile interior part odor testing method comprises the following steps:
step 1: the method comprises the steps that a vehicle is placed under various weathers in a real vehicle collection mode, a time-varying curve of the temperature of an interior trim part in the vehicle is measured and recorded, and a temperature variation database of the interior trim part in one day under different weather environments is formed;
step 2: determining a temperature time change curve corresponding to the weather environment required by the interior trim part to be tested according to the data in the database in the step 1;
and step 3: and (3) testing the interior trim part to be tested according to the temperature change curve along with time in the step (2) to make subjective evaluation on the odor.
In the step 1, a temperature sensor is arranged on the interior trim part to be detected, and a paperless recorder is adopted for recording and sorting.
In the step 3, the interior trim part to be tested is placed in a high-low temperature alternating test box, and the odor change of the interior trim part to be tested is tested through experimental simulation of a temperature environment.
The high-low temperature alternating test box realizes the change of the temperature of the test environment according to the selected temperature change curve along with the time through programming.
Selecting a time period corresponding to the weather environment of the interior trim part to be tested, inputting the time period into the high-low temperature exchange test box, and controlling the temperature in the high-low temperature exchange test box according to the temperature corresponding to the temperature change curve along with the time in the selected time period.
Putting the interior trim part to be tested into the pretreated odor evaluation bag, filling a certain amount of nitrogen into the odor evaluation bag according to the volume of the odor evaluation bag, sealing the odor evaluation bag, putting the odor evaluation bag filled with the interior trim part to be tested into a high-low temperature alternating test box for temperature test, and carrying out subjective evaluation on gas in the odor evaluation bag after the test is finished.
The pre-treatment of the odor evaluation bag included repeated flushing of the odor evaluation bag with nitrogen to neutralize the odor within the odor evaluation bag.
After the test is finished, the odor evaluation bag is placed in a room temperature environment, when the temperature of the interior trim part is reduced to a set value, the closed odor evaluation bag is opened, and the gas in the odor evaluation bag is evaluated.
Evaluating the gas in the odor evaluation bag means rating the gas odor.
The invention has the advantages that: the odor test is more reasonable and scientific, and the odor change of the interior trim part can be accurately tested, so that a host factory can conveniently improve and correct the odor of the interior trim part to provide data support; the test accords with the temperature state when actual whole car moves more, can more rationally accurately confirm the smell that gives off of interior trim part.
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The contents of the various figures of the present specification and the labels in the figures are briefly described as follows:
FIG. 1 is a schematic flow chart of the testing method of the present invention.
Detailed Description
The following description of preferred embodiments of the present invention will be made in further detail with reference to the accompanying drawings.
The invention provides a method for testing the smell of an automotive interior part, which aims to solve the problems that the smell source is difficult to investigate and the smell data acquisition is inaccurate due to the fact that the existing testing method can not accurately simulate the real condition of the smell diffusion in an automobile because the temperature of different parts in the automobile is different at the same time and the contribution values of the parts to the smell in the automobile are different, and the odor data acquisition of the automotive interior part is inaccurate. The invention discloses an automobile interior trim part odor test method, which is characterized in that the temperature of different interior trim parts in an automobile is acquired in one day through real automobile sampling, the acquired data is arranged, the arranged data is input into a high-low temperature alternating test box and set as a fixed program to serve as a test condition of one interior trim part of the automobile in one season in one weather, the whole data is acquired for 24 hours, and the test time can be selected according to actual requirements in the test process.
And (3) putting the interior trim part into a smell evaluation bag, placing the interior trim part into a high-low temperature alternating test box, running the high-low temperature alternating test box according to a selected program, after the program is finished, placing the smell evaluation bag at room temperature, cooling the smell to 60 +/-2 ℃, and smelling the smell and determining the smell grade by a smell evaluator qualified through professional training and examination.
An automobile interior part odor testing method comprises the following steps:
step 1: the method comprises the steps that a vehicle is placed under various weathers in a real vehicle collection mode, a time-varying curve of the temperature of an interior trim part in the vehicle is measured and recorded, and a temperature variation database of the interior trim part in one day under different weather environments is formed;
and 2, step: determining a time-varying curve of the temperature corresponding to the weather environment required by the interior trim part to be tested according to the data in the database in the step 1;
and step 3: and (3) testing the interior trim part to be tested according to the temperature change curve along with time in the step (2) to make subjective evaluation on the odor.
In the step 1, a temperature sensor is arranged on the interior trim part to be detected, and a paperless recorder is adopted for recording and sorting.
In the step 3, the interior trim part to be tested is placed in a high-low temperature alternating test box, and the odor change of the interior trim part to be tested is tested through experimental simulation of a temperature environment.
Placing the interior trim part to be tested into the pretreated odor evaluation bag, filling a certain amount of nitrogen into the odor evaluation bag according to the volume of the odor evaluation bag, sealing the odor evaluation bag, placing the odor evaluation bag filled with the interior trim part to be tested into a high-low temperature alternating test box for temperature test, and performing subjective evaluation on gas in the odor evaluation bag after the test is finished. The pre-treatment of the odor evaluation bag included repeated flushing of the odor evaluation bag with nitrogen to neutralize the odor within the odor evaluation bag. After the test is finished, the odor evaluation bag is placed in a room temperature environment, and when the temperature of the interior decoration piece is reduced to a set value, the closed odor evaluation bag is opened, and the gas in the odor evaluation bag is evaluated. The evaluation of the gas in the odor evaluation bag means that the gas odor is graded.
The high-low temperature alternating test chamber realizes the change of the temperature of the test environment according to the selected temperature change curve along with the time through programming. Selecting a time period corresponding to a weather environment for testing the interior trim part to be tested, inputting the time period into a high-low temperature exchange test box, determining a test time period, such as a time period from 10 to 14, for a time-varying temperature curve due to temperature data which is collected in a day and varies with time, controlling the temperature variation in the box according to the temperature curve in the time period from 10 to 14 by intercepting a part of the temperature-varying curve with time for testing, wherein the part is generally obvious in smell in certain specific time periods, and if the temperature is noon, selecting the noon temperature for testing. The set temperature can be adjusted according to actual requirements.
The invention provides a test method for an automobile interior ornament smell test, which comprises the following specific steps:
1. preparation of experimental instruments:
1. one whole vehicle to be tested
2. One paperless recorder (semiconductor temperature sensor, detection temperature range is 0-150 ℃), and one recording device
3. Odor evaluation bags with different volumes
4. Each interior part of the vehicle to be tested
5. High-low temperature alternating test box
2. The experimental test process comprises the following steps:
1. selecting a day with clear weather (multiple data such as clear weather, cloudy weather, rainy weather, snowy weather and the like can be selected in a tested weather environment), placing the whole vehicle in a non-shielded parking space, arranging two temperature sensors on each interior trim part, recording the real-time temperatures of the two temperature sensors by using a paperless recorder, and setting the recording time to be 24h, wherein one temperature data is recorded every 10 min.
2. The temperature data recorded by the paperless recorder are derived, the data are collated and the following table is filled in (each part fills in a form):
3. on the premise of ensuring the normal work of the temperature sensor, the more severe condition of T1 and T2 is selected to be set as the test condition of the interior trim part (T1 and T2 are respectively the temperature statistical data of the two sensors). And inputting a program to the high-low temperature alternating test box according to the selected current time, test temperature and duration time of T1 or T2, setting a program name of A vehicle type B and configuring an odor test of C interior trim part D under the environmental condition after the program is set, and filling A, B, C and D according to the actual condition.
4. Selecting a proper odor evaluation bag according to the size of the part to be tested, flushing the odor evaluation bag with nitrogen for several times to ensure the odor neutralization of the odor evaluation bag, filling the part to be tested into the odor evaluation bag, sealing the odor evaluation bag, filling quantitative nitrogen into the odor evaluation bag according to the size of the part to be tested, wherein the filling amount of the nitrogen is shown in the following table:
| odor bag type | Size (length x width)/cm of smell bag | Inflation volume/L |
| Type 1 | 35×35 | 3L |
| Type 2 | 70×60 | 15L |
| Type 3 | 120×120 | 60L |
| Type 4 | 190×110 | 150L |
| Type 5 | 200×128 | 300L |
5. And (3) placing the odor evaluation bag with the part to be tested into a high-low temperature alternating test box, and selecting the previously set test program of the part.
6. Selecting the time period for which the scent needs to be evaluated, (i.e., determining a segment of the temperature profile of the test to test) if the customer reflects 10:00-12: start, insert a step stop after the procedure after 12. And operating the program.
7. After the program is run, taking out the smell evaluation bag, placing the smell evaluation bag in a room temperature environment, sliding a sealing strip of the smell bag when the temperature of the part is reduced to 60 +/-2 ℃, opening one corner of the smell evaluation bag by about 5cm, enabling a nose of a smell evaluator to be close to an opening of the smell evaluation bag, lightly beating the smell evaluation bag by a hand to enable gas in the bag to escape, and judging the smell grade of the part by a professional smell evaluator qualified in the smell examination.
Odor ratings were determined according to the following table:
| grade | Odor intensity |
| Grade 1 score | Has no odor |
| Grade 1.5 | Between 1 and 2 levels |
| Grade 2 scoring | Smelling but not disturbing |
| Grade 2.5 | Between 2 and 3 levels |
| Grade 3 scoring | Has obvious smell but no interfering smell |
| Grade 3.5 | Between 3 and 4 levels |
| Grade 4 scoring | Interfering odor classes |
| Grade 4.5 | Between 4 and 5 grades |
| Grade 5 scoring | Has strong effectInterfering odor |
| Grade 5.5 | Between 5 and 6 grades |
| Grade 6 grading | Has intolerable odor |
The final rating is the arithmetic mean of the scores given by three or five raters, and if the mean is not an integer, may be on the order of about 0.5 times the nearest arithmetic mean, e.g., about 3.5 for a mean of 3.7 and about 4.0 for a mean of 3.8.
8. After one interior trim part experiment is finished, other interior trim part odor tests are carried out, and the steps are repeated for 3-7 until all interior trim parts are evaluated, so that the odor test of the interior trim parts to be tested can be realized. When the whole interior decoration part with peculiar smell is detected, all interior decoration parts are tested, the smell source is determined according to the evaluation result, the most serious smell source and the relatively heavy smell source are determined, and the subsequent improvement of the interior decoration part of the whole vehicle is facilitated.
9. Similarly, if the smell in the vehicle is bad in other time periods, the test program in the time period can be correspondingly selected to carry out the test, and the smell source is determined.
10. If the odor performance in the rainy environment needs to be tested, the temperature and humidity are collected firstly on the day with proper weather, and the following table is filled:
11. repeating the steps of 1-8, setting the humidity of the high-low temperature alternating test box according to the collected humidity, using the same program for the same configuration of the same vehicle, and using different configurations of different vehicles or the same vehicle, if the raw material manufacturer, the part manufacturer and the process of the interior decoration part are the same, adopting the program of the same vehicle type, if the raw material manufacturer, the part manufacturer or the process are different, collecting the environment in the vehicle again, and setting the test program according to the collection result.
If the target setting and development are carried out on the odor in the vehicle type development stage, the competitive product vehicle type can be selected to collect the temperature and the humidity in the vehicle, a test program is set, the odor performance test is carried out on the parts provided by a supplier, and the parts with unqualified test results are required to be rectified.
It is clear that the specific implementation of the invention is not restricted to the above-described embodiments, but that various insubstantial modifications of the inventive process concept and technical solutions are within the scope of protection of the invention.
Claims (1)
1. A method for testing the smell of an automotive interior part is characterized by comprising the following steps: the method comprises the following steps:
step 1: the method comprises the steps that a vehicle is placed under various weathers in a real vehicle collection mode, a time-varying curve of the temperature of an interior trim part in the vehicle is measured and recorded, and a temperature variation database of the interior trim part in one day under different weather environments is formed;
and 2, step: determining a temperature time change curve corresponding to the weather environment required by the interior trim part to be tested according to the data in the database in the step 1;
and step 3: testing the interior trim part to be tested according to the temperature change curve along with time in the step 2, and performing subjective evaluation on odor;
in the step 3, the interior trim part to be tested is placed in a high-low temperature alternating test box, and the odor change of the interior trim part to be tested is tested through experimental simulation of a temperature environment;
selecting a time period corresponding to a weather environment tested by the interior trim part to be tested, inputting the time period into the high-low temperature exchange test box, and controlling the temperature in the high-low temperature exchange test box according to the temperature corresponding to a time-varying curve of the temperature in the selected time period;
in the step 1, a temperature sensor is arranged on an interior trim part to be detected, and a paperless recorder is adopted for recording and sorting;
the high-low temperature alternating test box realizes the change of the temperature of the test environment according to a selected temperature change curve along with time through programming;
placing the interior trim part to be tested into a pretreated smell evaluation bag, filling a certain amount of nitrogen according to the volume of the smell evaluation bag, then sealing the smell evaluation bag, placing the smell evaluation bag filled with the interior trim part to be tested into a high-low temperature alternating test box for temperature test, and after the test is finished, subjectively evaluating the gas in the smell evaluation bag;
the pre-treatment of the odor evaluation bag comprises repeatedly flushing the odor evaluation bag with nitrogen gas to neutralize the odor within the odor evaluation bag;
after the test is finished, placing the odor evaluation bag in a room temperature environment, opening the closed odor evaluation bag when the temperature of the interior trim part is reduced to a set value, and evaluating the gas in the odor evaluation bag;
evaluating the gas in the odor evaluation bag means rating the gas odor.
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