The content of the invention
The present invention provides a kind of air-conditioning demisting defrosting performance test methods and system, it is intended to solves vehicle in the prior artThe problem of demisting defrosting performance test degree of accuracy and repeatability are unsatisfactory for requiring.
The invention provides a kind of air-conditioning demisting defrosting performance test methods, including：
Treat test vehicle to be pre-processed, with the front windshield of vehicle to be tested, left side glass pane, right side window glassUniform frost layer or mist layer are formed on glass；
Vehicle to be tested is adjusted to measurement condition；
Collection vehicle status information, the image of left side glass pane, the image of the image of front windshield and right side glass pane,And stored with time sequencing；
Obtained according to the image of the image of left side glass pane, the image of front windshield and right side glass pane and removed under each durationThe percentage of frost or the percentage of demisting；
The duration of default defrosting threshold value or default demisting threshold value is issued to according to different vehicle state, air-conditioning demisting is obtained and removesWhite performance.
Preferably, the car status information includes：
The temperature of each air-conditioner air outlet, wind speed, and battery tension, battery current, engine speed.
Preferably, when carrying out defrosting test, the test vehicle for the treatment of carries out pretreatment and included：
Stop working after vehicle to be tested is placed on into low temperature chamber；
The inner and outer surfaces of front windshield, left side glass pane and right side glass pane are cleaned with detergent, used after to be driedThe ammoniacal liquor for setting concentration wipes, and is wiped after to be dried with dry cloth；
Parked under the first setting test temperature no less than the first setting experiment duration, until engine coolant, lubricationThe temperature stabilization of agent sets test temperature first；
It is described vehicle to be tested is adjusted to measurement condition to include：
The water of first setting water is evenly dispersed on glass outer surface, generates uniform frost layer；
Start engine after the first stable duration, while open and remove defrosting system.
Preferably, when carrying out demisting test, the test vehicle for the treatment of carries out pretreatment and included：
Stop working after vehicle to be tested is placed on into low temperature chamber；
The inner and outer surfaces of front windshield, left side glass pane and right side glass pane are cleaned with detergent, used after to be driedThe ammoniacal liquor for setting concentration wipes, and is wiped after to be dried with dry cloth；
Parked under the second setting test temperature no less than the second setting experiment duration, until engine coolant, lubricationThe temperature stabilization of agent sets test temperature second；
It is described vehicle to be tested is adjusted to measurement condition to include：
Steam generator is placed on to the specified location of vehicle to be tested, with the first setting quantity of steam output steam；
After the 3rd setting duration, setting quantity personnel enter vehicle to be tested, while control steam generator with secondSet quantity of steam output steam；
Start engine after the second stable duration, while open demister system.
Preferably, the image according to the image of left side glass pane, the image of front windshield and right side glass pane obtainsTaking the percentage of the percentage to be defrosted under each duration or demisting includes：
Determined according to longitudinal vertical plane of driver's seating position center line, seating reference point and seat back angleThe area that the intersection that 4 planes that two points of sign driver's eyes extend forward intersect with glass surface is closed；
Using the area as first area；
Using the vertical center line of glass as axis, the region with the symmetrical glass in the first area is as second area；
It is the 3rd region in the first area and apart from the Minimum Area of inside at least the first length of glass edge；
Using the vertical center line of glass as axis, the region with the symmetrical glass in the 3rd region, with the 3rd areaDomain sum is as the 4th region；
Calculate and descended at different moments in first area, second area, the 4th region not by frost or the area ratio of mist covering respectivelyExample；
The region of transparency threshold is not exceeded for glass transparent degree by the region of frost or mist covering.
Preferably, the duration that default defrosting threshold value or default demisting threshold value are issued to according to different vehicle state, is obtainedAir-conditioning demisting defrosting performance is taken to include：
Defrosted for front windshield, after 20 minutes on-tests, the 80% of first area completes defrosting, on-testAfter 25 minutes, the 80% of second area completes defrosting, and after 40 minutes on-tests, four-range 95% is completed to meet during defrostingDefrosting requires；
For left side glass pane, the defrosting of right side glass pane, after 10 minutes on-tests, the 90% of first area completes to removeFrost, after 10 minutes on-tests, four-range 80% is completed to meet that defrosting requires during defrosting.
Preferably, the duration that default defrosting threshold value or default demisting threshold value are issued to according to different vehicle state, is obtainedAir-conditioning demisting defrosting performance is taken to include：
After 10 minutes on-tests, the 90% of first area completes demisting, and four-range 80% is completed to expire during demistingSufficient demisting requirement.
Correspondingly, a kind of air-conditioning demisting defrosting Performance Test System is additionally provided, including：
Data acquisition unit, car status information acquisition module, image capture module, data transmission module and host computer；
The car status information acquisition module is used for when vehicle to be measured is in measurement condition, collection vehicle status informationAnd it is sent to the data acquisition unit；
Described image acquisition module is used for when vehicle to be measured be in measurement condition, the image, preceding of glass pane on the left of collectionThe image of windshield and the image of right side glass pane, and it is sent to the data transmission module；
The car status information of reception is sent to the data transmission module by the data acquisition unit with predetermined period；
The data transmission module be used for time sequencing to the car status information of reception, left side glass pane image,The image of front windshield and the image of right side glass pane are packed, and are sent to the host computer；
The host computer is used to store car status information, the image of left side glass pane, the image of front windshield and the right sideThe image of side window glass, and obtained according to the image of the image of left side glass pane, the image of front windshield and right side glass paneThe percentage or the percentage of demisting to be defrosted under each duration, default defrosting threshold value or pre- is then issued to according to different vehicle stateIf the duration of demisting threshold value, air-conditioning demisting defrosting performance is obtained.
Preferably, the car status information acquisition module includes：Voltage measurement unit, current measuring unit, wind speed are surveyedMeasure unit, temperature measurement unit and OBD interface line；
The voltage measurement unit is used for the battery tension for measuring vehicle to be tested, and is sent to the data acquisitionDevice；
The current measuring unit is used for the battery current for measuring vehicle to be tested, and is sent to the data acquisitionDevice；
The measuring wind speed unit is used for the wind speed for measuring each air-conditioner air outlet of vehicle to be tested, and is sent to the numberAccording to collector；
The temperature measurement unit is used for the temperature for measuring each air-conditioner air outlet of vehicle to be tested, and is sent to the numberAccording to collector；
The OBD interface line is used for the OBD interface from vehicle to be testedEngine speed is received, and is transferred to the data acquisition unit；
Described image acquisition module includes：First imaging sensor, the second imaging sensor and the 3rd imaging sensor；
Described first image sensor is described for the image of the front windshield of the vehicle to be tested of collection to be sent toData transmission module；
Second imaging sensor is used to the image of the left side glass pane of the vehicle to be tested of collection being sent toThe data transmission module；
3rd imaging sensor is used to the image of the right side glass pane of the vehicle to be tested of collection being sent toThe data transmission module.
Preferably, the data acquisition unit includes：
Controller, high-speed controller lan interfaces, the first analog input module, the second analog input module and temperature are defeatedEnter module；
The input of the high-speed controller lan interfaces is connected with the OBD interface line,The high-speed controller lan interfaces output end is connected with the first input end of the controller；
The input of first analog input module is connected with the output end of the voltage measurement unit, first mouldThe output end for intending input module is connected with the second input of the controller；
The input of second analog input module output end with the current measuring unit and the wind speed respectivelyThe output end of measuring unit is connected, the output end of second analog input module and the 3rd input phase of the controllerEven；
The input of the temperature input module is connected with the output end of the temperature measurement unit, and the temperature inputs mouldThe output end of block is connected with the 4th input of the controller；
The output end of the controller is connected with the first input end of the data transmission module.
The invention discloses a kind of air-conditioning demisting defrosting performance test methods and system, treats test vehicle and is located in advanceReason, to form uniform frost layer or mist layer on the front windshield of vehicle to be tested, left side glass pane, right side glass pane, soVehicle to be tested is adjusted to measurement condition afterwards, can so ensure the state consistency of vehicle to be tested before testing, lifting is surveyedThe degree of accuracy of examination；Then, collection vehicle status information, the image of left side glass pane, the image of front windshield and right side window glassThe image of glass, and stored with time sequencing；Then according to the image of left side glass pane, the image of front windshield and right sideThe image of glass pane obtains the percentage to be defrosted under each duration or the percentage of demisting, due to by IMAQ and carrying out dataThe foundation of processing is fixed algorithm, the uniformity of testing standard can so be effectively ensured, and avoid and manually judge notCertainty so that the present invention can utilize computer to be issued to default defrosting threshold value or default demisting threshold according to different vehicle stateThe duration of value, air-conditioning demisting defrosting performance is obtained, effectively improves automaticity, it is accurate to improve demisting defrosting performance testDegree and repeatability.
Further, the car status information includes：The temperature of each air-conditioner air outlet, wind speed, and battery tension,Battery current, engine speed.Because demisting defrosting ability of the vehicle under different operating modes has difference, cause prior artWhen being tested, the degree of accuracy can not be protected, and the present invention acquires a variety of when carrying out demisting defrosting performance testCar status information：All it is that the information larger with demisting defrosting performance correlation is found through experiments that so that the present invention can obtainDemisting defrosting performance of the vehicle under different operating modes, and can have when test result fluctuate a foundation analyzes the tool fluctuatedBody reason.
Further, the present invention still further provides according to the image of left side glass pane, the image of front windshield andThe image of right side glass pane obtains the concrete methods of realizing of the percentage to be defrosted under each duration or the percentage of demisting, so can be withUsing machine automatically according to suitable standard acquisition image, then to the image of collection with consistent criterion calculation demisting defrosting propertyCan, effectively lift test accuracy and repeatability.
Further, the present invention gives the comparison standard of specific test result.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to endSame or similar label represents same or similar element or the element with same or like function.Below with reference to attachedThe embodiment of figure description is exemplary, is only used for explaining the present invention, and is not construed as limiting the claims.
It is provided by the invention.
In order to be better understood from technical scheme and technique effect, below with reference to flow chart and specific implementationExample is described in detail.
The embodiments of the invention provide a kind of air-conditioning demisting defrosting performance test methods, as shown in figure 1, for according to the present inventionA kind of flow chart for the air-conditioning demisting defrosting performance test methods that embodiment provides, this method comprise the following steps：
S01, treat test vehicle and pre-processed, with the front windshield of vehicle to be tested, left side glass pane, right sideUniform frost layer or mist layer are formed on glass pane.
In the present embodiment, the car status information includes：The temperature of each air-conditioner air outlet, wind speed, and batteryVoltage, battery current, engine speed.
In one embodiment, when carrying out defrosting test, the test vehicle for the treatment of carries out pretreatment and included：Will be to be testedVehicle stops working after being placed on low temperature chamber；To the inner and outer surfaces detergent of front windshield, left side glass pane and right side glass paneCleaning, wiped with the ammoniacal liquor of setting concentration after to be dried, wiped after to be dried with dry cloth；Parked under the first setting test temperatureNo less than the first setting experiment duration, until the temperature stabilization of engine coolant, lubricant sets test temperature first.ItsIn, clean method can be existing clean technologies, not limit herein, test temperature and experiment duration according to actual effect andIt is fixed.
Specifically, before experiment, instruction carriage is placed on low temperature chamber, stops working after parking, test is then built on instruction carriageSystem, electricity wouldn't be gone up.Oil is thoroughly removed with the alcohol containing formaldehyde or similar detergent to the inner and outer surfaces of windscreen simultaneouslyDirt, after drying, wiped with 3%~10% ammoniacal liquor, wiped again with dry cotton after dry.The preparatory stage is tested, instruction carriage is at -18 DEG CAt least parked under ± 3 DEG C of test temperatures 10 hours.Stablize if engine coolant, lubricant equitemperature are known in experiment temperatureWhen spending, the storage period can shorten.
In another embodiment, when carrying out demisting test, the test vehicle for the treatment of carries out pretreatment and included：Will be to be measuredTest run is stopped working after being placed on low temperature chamber；Inner and outer surfaces decontamination to front windshield, left side glass pane and right side glass paneAgent is cleaned, and is wiped with the ammoniacal liquor of setting concentration after to be dried, is wiped after to be dried with dry cloth；Stop under the second setting test temperaturePut and test duration no less than the second setting, until the temperature stabilization of engine coolant, lubricant sets test temperature second.Cleaning, experiment parameter etc. can according to the actual requirements depending on.
Specifically, before experiment, instruction carriage is placed on low temperature chamber, stopped working after parking, then test system building, Zan BushangElectricity.Greasy dirt is thoroughly removed with the alcohol containing formaldehyde or similar detergent to the inner and outer surfaces of windscreen simultaneously, after drying, used3%~10% ammoniacal liquor wipes, and is wiped again with dry cotton after dry.Test the preparatory stage, reduce room temperature until engine coolant,Untill when lubricant and vehicle interior temperature are stable in -3 DEG C ± 1 DEG C.
S02, vehicle to be tested is adjusted to measurement condition.
In the present embodiment, in order to further lift test accuracy, not only treat test vehicle and pre-processed, alsoMeasurement condition is further defined, so it is possible to prevente effectively from because measurement condition difference causes test result is inaccurate to askTopic, further, it is also possible to the air-conditioning demisting defrosting performance tested under different measurement conditions.
In one embodiment, it is described vehicle to be tested is adjusted to measurement condition to include when carrying out defrosting test：ByThe water of one setting water is evenly dispersed on glass outer surface, generates uniform frost layer；Start hair after the first stable durationMotivation, while open and remove defrosting system.
Specifically, with spray gun, water is equably ejected on glass outer surface, generates equably frost layer.It is specific to use1.7 millimeters, operating pressure 350kPa ± 20kPa of jet orifice diameter, liquid flowing rate 0.395L/ minutes, and can be apart from nozzle 200A diameter of 300 millimeters ± 50 millimeters of spray gun of the spray cone formed at millimeter, by 0.044g/cm2× windscreen area valueWater be equably ejected on glass outer surface, generation equably frost layer.During injection, nozzle should be perpendicular to glass surface, phaseAway from 200 millimeters~250 millimeters.After frost layer is formed on air regulator, automobile should also be parked 30 minutes~40 minutes in low temperature chamber.By 1Name or 2 testing crews into the car, start engine, can use certain external device start engine if necessary.Engine is openedBegin to operate, give test system to power, and open simultaneously and remove defrosting system, test formal beginning.
In another embodiment, it is described vehicle to be tested is adjusted to measurement condition to include when carrying out demisting test：WillSteam generator is placed on the specified location of vehicle to be tested, with the first setting quantity of steam output steam；Duration is set the 3rdAfterwards, setting quantity personnel enter vehicle to be tested, while control steam generator with the second setting quantity of steam output steam；Start engine after two stable durations, while open demister system.
Specifically, the steam generator for having at least 1.7L water is heated to boiling point, after stable, it is put into car as early as possibleIt is interior, shut car door.Steam generator should be placed on the place behind adjacent vehicle front seat backrest, and its gas outlet should be in driverAbove the R points of seat at 580 millimeters ± 80 millimeters on seat Symmetrical vertical central plane.If backrest be it is adjustable if should adjustTo predetermined angular.If peace fails to lay down after backrest, steam generator can be placed on before backrest closest to above-mentioned requirementsCorrect position.Steam generator exports quantity of steam, is n × (70g/h ± 5g/h) under the conditions of -3 DEG C -1 DEG C, n is automobile systemMake seating capacity as defined in factory.After steam generator works 5 minutes in the car, 1~2 testing crew enters anterior in vehicle.The quantity of steam that steam generator exports is controlled to reduce 70g/h ± 5g/h by each testing crew into the car simultaneously.Test peopleMember starts engine after 1 minute into the car.The rotating speed of engine during speed changer neutral, it should approach but be no more than its maximum workThe 50% of the corresponding rotating speed of rate, and it is relative that by the requirement of automaker the temperature thermostat of demister system is set into test temperatureThe value answered, while powered for test system, this moment is time on-test.
Step S03, collection vehicle status information, the image of left side glass pane, the image of front windshield and right side window glassThe image of glass, and stored with time sequencing.
Specifically, the information such as engine speed can be obtained by CAN, is obtained by imaging sensors such as video camera etc.The image of each glass is taken, each information of collection can include time attribute, in order to which each information is carried out with time sequencingPacking storage.
Step S04, obtained according to the image of the image of left side glass pane, the image of front windshield and right side glass pane eachThe percentage or the percentage of demisting to be defrosted under duration.
Specifically, the percentage of the percentage of defrosting or demisting can be calculated using pixel ratio, for example, will be identifiedSum divided by total pixel number for the pixel of frost or mist are the available percentage of defrosting lower at different moments or the percentage of demisting.
Step S05, the duration of default defrosting threshold value or default demisting threshold value is issued to according to different vehicle state, obtained emptyAdjust demisting defrosting performance.
In one embodiment, it is described that default defrosting threshold value or default demisting threshold value are issued to according to different vehicle stateDuration, obtaining air-conditioning demisting defrosting performance includes：
Defrosted for front windshield, after 20 minutes on-tests, the 80% of first area completes defrosting, on-testAfter 25 minutes, the 80% of second area completes defrosting, and after 40 minutes on-tests, four-range 95% is completed to meet during defrostingDefrosting requires；For left side glass pane, the defrosting of right side glass pane, after 10 minutes on-tests, the 90% of first area completes to removeFrost, after 10 minutes on-tests, four-range 80% is completed to meet that defrosting requires during defrosting.
In another embodiment, it is described that default defrosting threshold value or default demisting threshold value are issued to according to different vehicle stateDuration, obtaining air-conditioning demisting defrosting performance includes：After 10 minutes on-tests, the 90% of first area completes demisting, theFour-range 80% is completed to meet demisting requirement during demisting.
Air-conditioning demisting defrosting performance test methods provided in an embodiment of the present invention and system, treat test vehicle and located in advanceReason, to form uniform frost layer or mist layer on the front windshield of vehicle to be tested, left side glass pane, right side glass pane, soVehicle to be tested is adjusted to measurement condition afterwards, can so ensure the state consistency of vehicle to be tested before testing, lifting is surveyedThe degree of accuracy of examination；Then, collection vehicle status information, the image of left side glass pane, the image of front windshield and right side window glassThe image of glass, and stored with time sequencing；Then according to the image of left side glass pane, the image of front windshield and right sideThe image of glass pane obtains the percentage to be defrosted under each duration or the percentage of demisting, due to by IMAQ and carrying out dataThe foundation of processing is fixed algorithm, the uniformity of testing standard can so be effectively ensured, and avoid and manually judge notCertainty so that the present invention can utilize computer to be issued to default defrosting threshold value or default demisting threshold according to different vehicle stateThe duration of value, air-conditioning demisting defrosting performance is obtained, effectively improves automaticity, it is accurate to improve demisting defrosting performance testDegree and repeatability.
In other embodiments, present invention also offers the method for calculating defrosting percentage or demisting percentage, such as Fig. 2 institutesShow, be according to a kind of flow chart of the method provided in an embodiment of the present invention for calculating defrost percentage or demisting percentage, the partyMethod can include：
Step S21, according to longitudinal vertical plane, seating reference point and the backrest of driver's seating position center lineThe face that the intersection that 4 planes that two points that angle-determining characterizes driver's eyes extend forward intersect with glass surface is closedProduct.
In the present embodiment, the crucial sight part on glass can be accurately obtained by computer by this method,The region that mist, frost etc. block sight is not present in the part as far as possible.Due to being to be put on the basis of the eyes of driver in glassIt is upper to determine crucial sight part, therefore obtained crucial sight part more conforms to actual conditions, helps to lift test resultThe degree of accuracy.
Specifically, as shown in figure 3, principle schematic to be divided according to glassy zone provided in an embodiment of the present invention.It is softPart programming (if barbed chair, then should adjust seat to rearmost position) longitudinal direction of center line by driver's seating positionPoint V1, the V2 for the sign driver eye positions that vertical plane, seating reference point and design seat back angle determine, this two4 planes that individual point extends forward determine the A of front windshield with the area that the intersection that windscreen outer surface is intersected is closedArea (first area).Wherein 4 planes refer to by V1 and V2 points and put down in the left side of X-axis with X-axis into the vertical at 13 ° of angles respectivelyFace, by V1 points and X-axis into 3 ° of elevations angle and the plane parallel with Y-axis, by V2 points and X-axis into 1 ° of angle of depression and parallel with Y-axisPlane, the vertical plane by V1 and V2 points to X right side with X-axis into 13 ° of angles.The setting of above-mentioned parameter is all to human eye visionParameter summarize draw, certainly also can by experiment or analogue simulation obtain.
Step S22, using the area as first area.
Step S23, using the vertical center line of glass as axis, the region with the symmetrical glass in the first area is asTwo regions.
In the present embodiment, the second area is time crucial sight part, can equally influence the sight of driver, stillSignificance level for first area is lower slightly.
Specifically, the face on the basis of automobile longitudinal central plane, symmetrical region determines A ' regions (second with a-quadrantRegion).
Step S24, it is the 3rd in the first area and apart from the Minimum Area of inside at least the first length of glass edgeRegion.
Step S25, using the vertical center line of glass as axis, the region with the symmetrical glass in the 3rd region, with instituteThe 3rd region sum is stated as the 4th region.
In the present embodiment, the area of the air regulator outer surface surrounded by 4 planes and away from the transparent part of windscreenArea edge inwardly at least 25 millimeters, by compared with small area be defined determine B area (the 4th region), wherein 4 planes refer to respectively it is logicalCross V1 points and X-axis into 7 ° of elevations angle and the plane parallel with Y-axis, by V2 points and X-axis into 5 ° of angles of depression and the plane parallel with Y-axis,By V1 and V2 points X left side and X-axis into the vertical plane at 17 ° of angles, on the basis of automobile longitudinal central plane face and with it is logicalCross vertical plane symmetrical plane of the V1 and V2 points in X left side with X-axis into 17 ° of angles.
Step S26, calculate descend at different moments in first area, second area, the 4th region not by frost or mist covering respectivelyArea ratio.The region of transparency threshold is not exceeded for glass transparent degree by the region of frost or mist covering.
As shown in figure 4, it is a kind of schematic diagram according to ready-portioned glassy zone provided in an embodiment of the present invention.In this realityApply in example, illustrated by taking demisting as an example：The pixel count and A, B of A, B and A in windshield ' areas demisting are realized by softwareAnd the ratio between total pixel counts of A ' Qu obtain removing the percentage of defogging in regional；Pixel count except defogging and left side in the window of left sideThe ratio between total pixel count of window obtains the percentage that left side window removes defogging；Except the pixel count and the total picture of right side window of defogging in the window of right sideThe ratio between prime number obtains the percentage that right side window removes defogging.The situation of defrosting is similar.
The present invention still further provides according to the image of left side glass pane, the image of front windshield and right side glass paneImage obtain the concrete methods of realizing of the percentage to be defrosted under each duration or the percentage of demisting, can so utilize machine fromIt is dynamic according to suitable standard acquisition image, then the image of collection is defrosted performance with consistent criterion calculation demisting, effectively carriedRise test accuracy and repeatability.
Correspondingly, present invention also offers air-conditioning demisting corresponding with above method defrosting Performance Test System, such as Fig. 5 institutesShow, be according to the first structural representation of air-conditioning demisting provided in an embodiment of the present invention defrosting Performance Test System, the systemIncluding：
Data acquisition unit, car status information acquisition module, image capture module, data transmission module and host computer.
The car status information acquisition module is used for when vehicle to be measured is in measurement condition, collection vehicle status informationAnd it is sent to the data acquisition unit.
Described image acquisition module is used for when vehicle to be measured be in measurement condition, the image, preceding of glass pane on the left of collectionThe image of windshield and the image of right side glass pane, and it is sent to the data transmission module.
The car status information of reception is sent to the data transmission module by the data acquisition unit with predetermined period.
The data transmission module be used for time sequencing to the car status information of reception, left side glass pane image,The image of front windshield and the image of right side glass pane are packed, and are sent to the host computer.
The host computer is used to store car status information, the image of left side glass pane, the image of front windshield and the right sideThe image of side window glass, and obtained according to the image of the image of left side glass pane, the image of front windshield and right side glass paneThe percentage or the percentage of demisting to be defrosted under each duration, default defrosting threshold value or pre- is then issued to according to different vehicle stateIf the duration of demisting threshold value, air-conditioning demisting defrosting performance is obtained.
Wherein, car status information acquisition module be able to can also utilize certainly directly using the information on vehicle CAN busStandby sensor carries out information gathering, and image capture module can be camera etc., will not be described in detail herein.
As shown in fig. 6, second of knot for the Performance Test System that defrosted according to air-conditioning demisting provided in an embodiment of the present inventionStructure schematic diagram, the car status information acquisition module include：Voltage measurement unit, current measuring unit, measuring wind speed unit,Temperature measurement unit and OBD interface line.
The voltage measurement unit is used for the battery tension for measuring vehicle to be tested, and is sent to the data acquisitionDevice.
The current measuring unit is used for the battery current for measuring vehicle to be tested, and is sent to the data acquisitionDevice.
The measuring wind speed unit is used for the wind speed for measuring each air-conditioner air outlet of vehicle to be tested, and is sent to the numberAccording to collector.
The temperature measurement unit is used for the temperature for measuring each air-conditioner air outlet of vehicle to be tested, and is sent to the numberAccording to collector.
OBD interface (OBD) patchcord is used for the OBD from vehicle to be testedInterface engine speed, and it is transferred to the data acquisition unit.
Described image acquisition module includes：First imaging sensor, the second imaging sensor and the 3rd imaging sensor.
Described first image sensor is described for the image of the front windshield of the vehicle to be tested of collection to be sent toData transmission module.
Second imaging sensor is used to the image of the left side glass pane of the vehicle to be tested of collection being sent toThe data transmission module.
3rd imaging sensor is used to the image of the right side glass pane of the vehicle to be tested of collection being sent toThe data transmission module.
Preferably, the data acquisition unit includes：
Controller, high-speed controller lan interfaces, the first analog input module, the second analog input module and temperature are defeatedEnter module.
The input of the high-speed controller lan interfaces is connected with the OBD interface line,The high-speed controller lan interfaces output end is connected with the first input end of the controller.
The input of first analog input module is connected with the output end of the voltage measurement unit, first mouldThe output end for intending input module is connected with the second input of the controller.
The input of second analog input module output end with the current measuring unit and the wind speed respectivelyThe output end of measuring unit is connected, the output end of second analog input module and the 3rd input phase of the controllerEven.
The input of the temperature input module is connected with the output end of the temperature measurement unit, and the temperature inputs mouldThe output end of block is connected with the 4th input of the controller.
The output end of the controller is connected with the first input end of the data transmission module.
In a specific embodiment, air-conditioning demisting defrosting Performance Test System includes power supply, power conversion unit, theOne sensor unit, second sensor unit, data acquisition unit, data transmission module, PC.
Power transfer module is connected with power supply, and it is respectively first sensor unit, second sensor to export suitable voltageUnit, data acquisition unit, data transmission module power supply.Power transfer module is connected with power supply, and it is respectively to export 12V DCCurrent measurement module, data acquisition unit and data transmission module power supply in one sensor unit；Output 24V DC are respectively theOne imaging sensor, the second imaging sensor, the power supply of the 3rd imaging sensor.
First sensor unit uploads sensor signal to data acquisition unit via data port.First sensor unitIncluding temperature-measuring module, voltage measurement module, current measurement module, measuring wind speed module and OBD patchcords.
Temperature-measuring module, voltage measurement module, current measurement module, measuring wind speed module pass through data wire and number respectivelyIt is connected according to collector.Temperature-measuring module has 4 passages, gathers the left side air outlet of air conditioning for automobiles respectively, front left side goes outThe temperature information in air port, front right side air-out mouth and right side window air outlet, Bing Jiangge roads temperature signal are transmitted to data acquisition unit.
Voltage measurement module one end is connected with the both positive and negative polarity of battery, and the other end is connected with data acquisition unit.Voltage is surveyedModule collection automobile storage battery voltage is measured, and voltage signal is transmitted to data acquisition unit.
Current measurement module one end is connected with the power line of battery, and the other end is connected with data acquisition unit.Electric current is surveyedModule collection automobile storage battery electric current is measured, and voltage signal is transmitted to data acquisition unit.
Wind velocity measurement module has 4 passages, gathers left side air outlet, the front left side air-out of air conditioning for automobiles respectivelyThe wind speed information of mouth, front right side air-out mouth and right side window air outlet, Bing Jiangge roads wind velocity signal are transmitted to data acquisition unit.OBD patchcords are plugged on automatic vehicle diagnosis interface, and other end is connector type communication interface (Lemo interfaces), and with instituteData acquisition unit is stated to be connected.Vehicle OBD information is passed through CAN or K bus transfers to data acquisition unit by OBD patchcords.
Data acquisition unit receives first sensor signal and carries out preliminary treatment, is then transferred to number via data portAccording to transport module.
Second sensor unit includes the first imaging sensor, the second imaging sensor and the 3rd imaging sensor.FirstImaging sensor, the second imaging sensor and the 3rd imaging sensor gather automobile left side window, windshield and right side window respectivelyImage information, Bing Jiangge roads image information are transferred to data transmission module.
First imaging sensor is connected with data transmission module, and it is arranged on fixed support, and face front windshield,The image information of collection shield glass is transferred to data transmission module.
Second imaging sensor is connected with data transmission module, and it is arranged on fixed support, and face vehicle to be testedLeft side glass pane, the left side glass pane image information for gathering vehicle to be tested is transferred to data transmission module.
3rd imaging sensor is connected with data transmission module, and it is arranged on fixed support, and face vehicle to be testedRight side glass pane, gather the right side glass pane information transfer of vehicle to be tested to data transmission module.
First imaging sensor, the second imaging sensor and the 3rd imaging sensor and data acquisition unit pass through data respectivelyLine is connected with data transmission module, and the other end of data transmission module is connected with PC.
The sensor signal for the first sensor unit that data transmission module receives and the image letter of second sensor unit(such as packing) is transmitted to PC after number carrying out preliminary treatment.
Data acquisition implement body can use the controllers of cRIO 9038, the temperature acquisition moulds of NI 9214 of NI companies of the U.S.Block, the voltage acquisition modules of NI 9229, the current acquisition modules of NI 9205 and wind speed acquisition module, the high-speed CANs of NI 9853 collection mouldBlock, the wherein controllers of cRIO 9038 have 2 gigabit Ethernets, 2 USB high speed host computer hosts, 1 USB device and 2 serial endsMouth connectivity option, its working range are -40 DEG C to 70 DEG C.
Software programming is carried out on PC from patterned programming language LabVIEW, its programming process is simple and convenient, canInterface is adjusted and used according to the different demands of user, the construction cycle is short.
Testing standard can be effectively ensured in a kind of air-conditioning demisting defrosting Performance Test System provided in an embodiment of the present inventionUniformity, and avoid the uncertainty manually judged so that the present invention can utilize computer according under different vehicle stateReach the duration of default defrosting threshold value or default demisting threshold value, obtain air-conditioning demisting defrosting performance, effectively improve automation journeyDegree, improve the demisting defrosting performance test degree of accuracy and repeatability.
Each embodiment in this specification is described by the way of progressive, identical similar portion between each embodimentPoint mutually referring to.For system embodiment, because it is substantially similar to embodiment of the method, so describingFairly simple, the relevent part can refer to the partial explaination of embodiments of method.System embodiment described above is only to showMeaning property, wherein the unit illustrated as separating component can be or may not be it is physically separate, as listThe part of member display can be or may not be physical location, you can with positioned at a place, or can also be distributed toOn multiple artificial windows.Some or all of module therein can be selected to realize this embodiment scheme according to the actual needsPurpose.Those of ordinary skill in the art are without creative efforts, you can to understand and implement.
Although the present invention is disclosed as above with preferred embodiment, but is not limited to the present invention.It is any to be familiar with abilityThe technical staff in domain, without departing from the scope of the technical proposal of the invention, all using in the methods and techniques of the disclosure aboveAppearance makes many possible changes and modifications to technical solution of the present invention, or is revised as the equivalent embodiment of equivalent variations.Therefore,Every content without departing from technical solution of the present invention, the technical spirit according to the present invention is to made for any of the above embodiments any simpleModification, equivalent variations and modification, in the range of still falling within technical solution of the present invention protection.