Method for testing barrier property of particulate matters at different positions in vehicle

Abstract

The invention discloses a method for testing the barrier property of particulate matters at different positions in a vehicle, which comprises the following steps: arranging a sealable test cabin, and arranging a smoke generator and an air particulate matter sensor in the test cabin; a to-be-tested vehicle is placed in the test cabin, and dummy models are placed in a main driving position, a co-driving position and rear row seats in the vehicle; an air particulate matter sensor is arranged on the dummy model so as to collect air particulate matter concentrations at different positions in the vehicle in real time; closing the test cabin, injecting particulate matters into the to-be-tested vehicle through a smoke generator, and recording air particulate matter concentrations collected by the dummy models at different positions in the vehicle; according to the change rate of the air particulate matter concentration of the dummy module at different positions, the barrier performance of different positions in the cabin in the vehicle is judged. Pollution conditions faced by drivers and passengers at different positions in the cabin can be visually reflected, and the body health of the drivers and the passengers is protected.

Description

Technical Field

[0001] The present invention relates to the technical field of autonomous driving virtual scenes, and more specifically, to a method for testing particle barrier performance at different locations in a vehicle. Background Art

[0002] As the most frequently used means of transportation for daily travel, cars have been regarded by more people as the second living space after home. People not only hope that cars can resist wind and cold and block environmental pollution outside the car, but also hope to breathe fresh air in the car to ensure physical and mental health. However, when the vehicle is driving and parked, the internal environment will be threatened by automobile exhaust, road dust, and particulate matter emitted by industry. The International Cancer Agency under the World Health Organization clearly defines PM 2.5 particulate matter as a class of carcinogens. When a car passes by an industrial production base, there is serious traffic jam during rush hour, or when encountering high pollution weather, it will be exposed to a severely polluted environment for a short time. If the sealing of the whole vehicle is not good, particulate matter will enter the car, which will have an adverse effect on the health of the driver and passengers. When the car door is closed, whether the air conditioning particulate matter purification function is turned on or not, the concentration of particulate matter at different positions in the car will also be significantly different. In order to better evaluate the exposure of passengers at different positions to pollutants in different car use scenarios, it is necessary to detect and analyze particulate matter at different positions. Therefore, it is of great significance to conduct barrier tests at different positions in the car to optimize the barrier performance in the car. Summary of the invention

[0003] The present invention provides a method for testing the particle barrier performance at different positions in a vehicle, which solves the problem that the existing vehicle evaluation of the particle barrier performance at different positions in the vehicle lacks objective indicators for evaluation and is inaccurate and subjective. The method can improve the particle barrier performance in the vehicle, intuitively reflect the pollution conditions faced by drivers and passengers at different positions in the cabin, and protect the health of the drivers and passengers.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A method for testing particle barrier performance at different locations in a vehicle, comprising:

[0006] A sealable test chamber is provided, wherein a smoke generator and an air particle sensor are arranged in the test chamber;

[0007] The vehicle to be tested is placed in the test chamber, and dummy models are placed on the main driver's seat, the co-driver's seat, and the rear seat in the vehicle;

[0008] An air particle sensor is placed on the dummy model to collect the concentration of air particles at different locations in the vehicle in real time;

[0009] Close the test chamber, inject particulate matter into the vehicle under test through a smoke generator, and record the concentration of air particulate matter collected by the dummy model at different positions in the vehicle;

[0010] The barrier performance at different locations in the vehicle cabin is determined based on the rate of change of the concentration of air particles at the dummy modules at different locations.

[0011] Preferably, it also includes:

[0012] During the test, all car doors were opened and the car air conditioner was turned on to purify the air inside the car. When the particle concentration in the test chamber was the same as that in the car and the reading was stable at 5 µg / m 3 When the following, close the car air conditioner and all doors.

[0013] Preferably, it also includes:

[0014] The smoke generator injects particulate matter into the test chamber. When the particle concentration in the test chamber reaches the preset value of 600 µg / m 3 When the smoke generator is turned off, the data of the air particle sensors corresponding to the dummy models at different positions in the vehicle will be recorded. The data recording time is 30 minutes.

[0015] Preferably, the step of arranging the air particle sensor on the dummy model comprises:

[0016] Place the air particle sensor above the head or neck of the manikin.

[0017] Preferably, the determining of the barrier performance at different positions in the vehicle cabin according to the change rate of the concentration of air particles at the dummy modules at different positions includes:

[0018] Obtain the initial air particle concentration corresponding to the main driver's seat, the co-driver's seat and the rear seat position and the air particle concentration 30 minutes after the start of the test, and calculate the corresponding particle growth amount and particle concentration growth rate within 30 minutes;

[0019] The corresponding particle growth amount and particle concentration growth rate are compared to determine the quality of the corresponding barrier performance of the main driving position, the co-pilot position and the rear seat position.

[0020] Preferably, the calculation to obtain the corresponding particle growth amount and particle concentration growth rate within 30 minutes includes:

[0021] The growth of particles within 30 minutes is equal to the difference between the air particle concentration 30 minutes after the start of the test and the initial air particle concentration;

[0022] The growth rate of the particle concentration within 30 minutes is equal to the value obtained by dividing the growth amount of the particle concentration within the 30 minutes by 30 minutes.

[0023] Preferably, it also includes:

[0024] The test chamber is provided with a lighting simulation system and an air conditioning system. The lighting simulation system is used to simulate the external lighting and radiation environment of the test vehicle, and the air conditioning system is used to control the test chamber to be in a set temperature and humidity environment.

[0025] Preferably, it also includes:

[0026] A fan is arranged in the test chamber, and is placed in a space of 1.0-1.5 m away from the vehicle body, and is always kept on during the test, with a wind speed of 4-8 m / s.

[0027] Preferably, it also includes:

[0028] An exhaust gas emission device is arranged in the test chamber to lead the exhaust gas of the test vehicle out of the test chamber.

[0029] Preferably, the lighting simulation system irradiates the test vehicle so that the roof surface reaches 400 W / m 2 ±50W / m 2 radiation intensity.

[0030] The present invention provides a method for testing the particle barrier performance at different positions in a car. A test cabin is set, a test vehicle is set in the test cabin, and a dummy model is placed in the car. The concentration change of particles in the car when there are passengers occupying the space in the car can be simulated to judge the barrier performance at different positions in the cabin. The existing evaluation of the particle barrier performance at different positions in the car is solved, which lacks objective indicators for evaluation and is inaccurate and subjective. The particle barrier performance of the car can be improved, and the pollution situation faced by the passengers at different positions in the cabin can be intuitively reflected, so as to protect the health of the passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below.

[0032] Figure 1 It is a schematic diagram of a method for testing particle barrier performance at different positions in a vehicle provided by the present invention. DETAILED DESCRIPTION

[0033] In order to enable persons skilled in the art to better understand the solutions of the embodiments of the present invention, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and implementation modes.

[0034] In view of the problem that the existing automobile has inaccurate and subjective evaluation on the particle barrier performance at different positions in the car, the present invention provides a method for testing the particle barrier performance at different positions in the car, which solves the problem that the existing automobile has inaccurate and subjective evaluation on the particle barrier performance at different positions in the car due to the lack of objective indicators. The method can improve the particle barrier performance in the car, intuitively reflect the pollution conditions faced by drivers and passengers at different positions in the cabin, and protect the health of drivers and passengers.

[0035] like Figure 1 As shown, a method for testing the particle barrier performance at different locations in a vehicle includes:

[0036] S1: A sealable test chamber is provided, wherein a smoke generator and an air particle sensor are arranged in the test chamber.

[0037] S2: placing the vehicle to be tested in the test chamber, and placing dummy models on the main driver's seat, the co-driver's seat, and the rear seats in the vehicle.

[0038] S3: An air particle sensor is set on the dummy model to collect the air particle concentration at different locations in the vehicle in real time.

[0039] S4: Close the test chamber, inject particulate matter into the vehicle under test through the smoke generator, and record the concentration of air particulate matter collected by the dummy model at different positions in the vehicle.

[0040] S5: Determine the barrier performance at different locations in the vehicle cabin based on the rate of change of the concentration of air particles at the dummy modules at different locations.

[0041] Specifically, the vehicle to be tested is placed in a sealable test cabin, a smoke generator and an air particle sensor are placed in the test cabin, and dummy models are placed in the main driver's seat, the co-driver's seat, and the back seat in the car. The number of dummy models placed in the back seat can be one to three, representing different test positions. The air particle sensor is arranged on the dummy model, the test cabin is closed, the air particle sensor in the test cabin and the air particle sensor at the head position of the dummy in the car are turned on, the smoke generator is turned on to inject particles into the cabin, and the change rate of the particle concentration at different positions is collected by the air particle concentration sensor to determine the barrier performance at different positions in the cabin. The arrangement of dummy models at different positions can calculate the amount of particle infiltration at different positions in the car and determine the different pollutant exposure levels faced by drivers and passengers sitting at different positions in the car. This method can intuitively reflect the pollution faced by drivers and passengers at different positions in the cabin. According to the test results, it is conducive to taking targeted pollutant blocking and prevention measures for different positions in the cabin, improving the air quality in the car, and protecting the health of drivers and passengers.

[0042] The method also includes: during the test, first open all the car doors and turn on the car air conditioner to purify the air in the car. When the particle concentration in the test cabin is the same as that in the car, and the reading is stable at 5 µg / m 3 When the following, close the car air conditioner and all doors.

[0043] The method further comprises: injecting particulate matter into the test chamber through a smoke generator, and when the concentration of particulate matter in the test chamber reaches a preset value of 600 µg / m 3 When the smoke generator is turned off, the data of the air particle sensors corresponding to the dummy models at different positions in the vehicle will be recorded. The data recording time is 30 minutes.

[0044] Further, the step of arranging the air particle sensor on the dummy model includes: arranging the air particle sensor above the head or neck of the dummy model.

[0045] Further, the determining of the barrier performance at different positions in the vehicle cabin according to the change rate of the concentration of air particles at the dummy modules at different positions includes:

[0046] The initial air particle concentration corresponding to the main driver's seat, the co-driver's seat and the rear seat position and the air particle concentration 30 minutes after the start of the test are obtained, and the corresponding particle growth amount and particle concentration growth rate within 30 minutes are calculated.

[0047] The corresponding particle growth amount and particle concentration growth rate are compared to determine the quality of the corresponding barrier performance of the main driving position, the co-pilot position and the rear seat position.

[0048] Further, the calculation obtains the corresponding particle growth amount and particle concentration growth rate within 30 minutes, including:

[0049] The particle growth within 30 minutes is equal to the difference between the air particle concentration 30 minutes after the start of the test and the initial air particle concentration.

[0050] The growth rate of the particle concentration within 30 minutes is equal to the value obtained by dividing the growth amount of the particle concentration within the 30 minutes by 30 minutes.

[0051] In practical applications, the initial concentration of particulate matter in the main driving position is c 1a , half an hour later the concentration is c 1b , the pollutant growth in half an hour δ1=c 1b -c 1a , growth rate v1= ; The initial concentration of particulate matter at the passenger seat is c 2a , half an hour later the concentration is c 2b , the pollutant growth in half an hour δ2=c2b -c 2a , growth rate v2 ; The initial concentration of particles in the rear seats is c 3a , half an hour later the concentration is c 3b , the pollutant growth in half an hour δ3=c 3b -c 3a , growth rate v3 .

[0052] In one embodiment, the data shown in Table 1 can be obtained through test calculation. The initial concentration of particulate matter in the main driver's seat of vehicle A is 5 μg / m 3 , increased to 57 µg / m in half an hour 3 , the passenger seat is 8 µg / m 3 , increased to 76 µg / m in half an hour 3 , the rear seats are 9 µg / m 3 , increased to 81 µg / m in half an hour 3 The initial concentration of particulate matter in the main driver's seat of vehicle B was 3 µg / m 3 , increased to 48 µg / m in half an hour 3 , the passenger seat is 2 µg / m 3 , increased to 49 µg / m in half an hour 3 , the rear seats are 2 µg / m 3 , increased to 51 µg / m in half an hour 3 For vehicle model A, δ1=52 µg / m 3 ,v1=1.73 µg / m 3 ·min; δ2=68 µg / m 3 ,v2=2.27 µg / m 3 ·min; δ3=72µg / m 3 ,v3=2.40 µg / m 3 ·min. For vehicle type B, δ1=45 µg / m 3 ,v1=1.50 µg / m 3 ·min; δ2=47 µg / m 3 ,v2=1.57 µg / m 3 ·min; δ3=49 µg / m 3 ,v3=1.63 µg / m 3 ·min.

[0053] By comparing the δ and v values, we can determine the pollution conditions faced by drivers and passengers in different positions in the cabin. Take vehicle model A as an example: Since δ1<δ2<δ3, the exposure level of pollutants to drivers and passengers in the rear seats is higher than that in the front passenger seat, and the exposure level of pollutants to drivers and passengers in the front passenger seat is higher than that in the main driver seat. Since v1<v2<v3, we can know that the barrier performance of different positions in the cabin is: the main driver seat is better than the front passenger seat, and the front passenger seat is better than the rear seat.

[0054] Table 1 shows the pollution conditions faced by drivers and passengers at different positions in the cabin. According to the test results, it is helpful to carry out targeted pollutant isolation and prevention measures at different positions in the cabin, improve the air quality in the car, and protect the health of drivers and passengers.

[0055]

[0056] Although the interior of a car is a relatively closed system, the growth of particulate pollutants in the car varies. At the same time, the location and purification effect of the air conditioner in the car are different. By comparing and analyzing the growth amount and growth rate of polluted particles in different locations, we can objectively evaluate the level of particulate matter purification in the car and quantitatively evaluate the level of protection of different models for drivers and passengers in the car.

[0057] The method also includes: a light simulation system and an air conditioning system are arranged in the test chamber, the light simulation system is used to simulate the external light and radiation environment of the test vehicle, and the air conditioning system is used to control the test chamber to be in a set temperature and humidity environment.

[0058] The method further includes: arranging a fan in the test chamber, the fan being placed within a space of 1.0-1.5 m from the vehicle body and being kept on during the test, with a wind speed of 4-8 m / s.

[0059] The method further includes: arranging an exhaust gas emission device in the test chamber to lead the exhaust gas of the test vehicle out of the test chamber.

[0060] The method further includes: the lighting simulation system irradiates the test vehicle so that the roof surface reaches 400 W / m 2 ±50 W / m 2 radiation intensity.

[0061] In practical applications, the test cabin should be large enough to park the vehicle under test completely and facilitate testing and sampling. An air conditioning system should be installed in the test cabin. The control accuracy of the air conditioning system at 25 ℃ is ≤±1.0 ℃; the control accuracy at 50% relative humidity is ≤±10%. The test cabin is also equipped with a light simulation system, which uses infrared radiators, halogen radiators or other radiators to heat the vehicle under test with fixed radiation. The middle point of the roof surface of the vehicle under test should be reached. The radiator is set on the roof, and the irradiation angle of the heating area is 90°, and there is no radiator irradiation from the side. The test cabin is also equipped with an exhaust emission device that can lead the exhaust gas emitted by the vehicle under test out of the cabin. The test cabin should be equipped with an environmental monitoring system, and at least one online temperature and humidity monitoring point should be set. The monitoring point is set within a space range of 0.5 m around the vehicle body, and the height is equivalent to the sampling point position in the vehicle. In addition, there should be an irradiance monitoring point located in the middle of the upper roof. A fan, smoke generator and air particle sensor are placed in the test chamber. The fan is placed in any random range of 1.0-1.5m from the vehicle body, and the height is equivalent to the sampling point in the vehicle. The smoke generator is placed in any random range of 0.5m from the vehicle body, and the height is equivalent to the sampling point in the vehicle. The air particle sensor is placed at the head of the dummy model in the vehicle. The fan is always turned on during the test, with a wind speed of 4-8 m / s.

[0062] It can be seen that the present invention provides a method for testing the particle barrier performance at different positions in a car. A test cabin is set, a test vehicle is set in the test cabin, and a dummy model is placed in the car. This can simulate the concentration change of particles in the car when there are passengers occupying the space inside the car, so as to judge the barrier performance at different positions in the cabin. This method solves the problem that the existing evaluation of the particle barrier performance at different positions in the car lacks objective indicators for evaluation, and there are inaccuracies and objectivity. It can improve the particle barrier performance of the car, and can intuitively reflect the pollution situation faced by passengers at different positions in the cabin, thereby protecting the health of the passengers.

[0063] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the drawings. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and drawings, should be within the protection scope of the present invention.

Claims

1. A method for testing the particle barrier performance at different locations in a vehicle, characterized in that: include: A sealable test chamber is provided, wherein a smoke generator and an air particle sensor are arranged in the test chamber; The vehicle to be tested is placed in the test chamber, and dummy models are placed on the main driver's seat, the co-driver's seat, and the rear seat in the vehicle; An air particle sensor is placed on the dummy model to collect the concentration of air particles at different locations in the vehicle in real time; Close the test chamber, inject particulate matter into the vehicle under test through a smoke generator, and record the concentration of air particulate matter collected by the dummy model at different positions in the vehicle; The barrier performance at different locations in the vehicle cabin is determined based on the rate of change of the concentration of air particles at the dummy modules at different locations.

2. The method for testing the particle barrier performance at different positions in a vehicle according to claim 1, characterized in that: Also includes: During the test, all car doors were opened and the car air conditioner was turned on to purify the air inside the car. When the particle concentration in the test chamber was the same as that in the car and the reading was stable at 5 µg / m 3 When the following, close the car air conditioner and all doors.

3. The method for testing the particle barrier performance at different positions in a vehicle according to claim 2, characterized in that: Also includes: The smoke generator injects particulate matter into the test chamber. When the particle concentration in the test chamber reaches the preset value of 600 µg / m 3 When the smoke generator is turned off, the data of the air particle sensors corresponding to the dummy models at different positions in the vehicle will be recorded. The data recording time is 30 minutes.

4. The method for testing the particle barrier performance at different positions in a vehicle according to claim 3, characterized in that: The step of arranging the air particle sensor on the dummy model comprises: Place the air particle sensor above the head or neck of the manikin.

5. The method for testing the particle barrier performance at different positions in a vehicle according to claim 4, characterized in that: The method of determining the barrier performance at different positions in the vehicle cabin according to the change rate of the concentration of air particles at the dummy modules at different positions includes: Obtain the initial air particle concentration corresponding to the main driver's seat, the co-driver's seat and the rear seat position and the air particle concentration 30 minutes after the start of the test, and calculate the corresponding particle growth amount and particle concentration growth rate within 30 minutes; The corresponding particle growth amount and particle concentration growth rate are compared to determine the quality of the corresponding barrier performance of the main driving position, the co-pilot position and the rear seat position.

6. The method for testing the particle barrier performance at different positions in a vehicle according to claim 5, characterized in that: The calculation obtains the corresponding particle growth amount and particle concentration growth rate within 30 minutes, including: The growth of particles within 30 minutes is equal to the difference between the air particle concentration 30 minutes after the start of the test and the initial air particle concentration; The growth rate of the particle concentration within 30 minutes is equal to the value obtained by dividing the growth amount of the particle concentration within the 30 minutes by 30 minutes.

7. The method for testing particle barrier performance at different locations in a vehicle according to claim 6, characterized in that: Also includes: The test chamber is provided with a lighting simulation system and an air conditioning system. The lighting simulation system is used to simulate the external lighting and radiation environment of the test vehicle, and the air conditioning system is used to control the test chamber to be in a set temperature and humidity environment.

8. The method for testing particle barrier performance at different positions in a vehicle according to claim 7, characterized in that: Also includes: A fan is arranged in the test chamber, and is placed in a space of 1.0-1.5 m away from the vehicle body, and is always kept on during the test, with a wind speed of 4-8 m / s.

9. The method for testing particle barrier performance at different positions in a vehicle according to claim 8, characterized in that: Also includes: An exhaust gas emission device is arranged in the test chamber to lead the exhaust gas of the test vehicle out of the test chamber.

10. The method for testing particle barrier performance at different positions in a vehicle according to claim 9, characterized in that: The lighting simulation system irradiates the test vehicle so that the roof surface reaches 400 W / m 2 ±50 W / m 2 radiation intensity.

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