CN108240875A - A kind of measuring method of outdoor automobile temperature - Google Patents
A kind of measuring method of outdoor automobile temperature Download PDFInfo
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- CN108240875A CN108240875A CN201611213711.2A CN201611213711A CN108240875A CN 108240875 A CN108240875 A CN 108240875A CN 201611213711 A CN201611213711 A CN 201611213711A CN 108240875 A CN108240875 A CN 108240875A
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- temperature
- outdoor
- angle value
- recorded
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
Abstract
A kind of measuring method of outdoor automobile temperature, is related to field of temperature measurement.This method considers influence of the factors such as the measured value of water temperature, speed and current outdoor temperature to outdoor temperature, and the method for the present invention can reduce influence of the external environment to outdoor temperature to greatest extent, obtain accurate outdoor temp angle value.
Description
Technical field
The present invention relates to field of temperature measurement, more particularly to a kind of measuring method of outdoor automobile temperature.
Background technology
With the development of automotive electronic technology, and user car comfort requirement is gradually increased, many middle and high ends
Vehicle be provided with automatic air condition.Automatic air condition can be according to the set temperature of user, by constantly acquiring vehicle interior temperature, outside vehicle
The information such as temperature, sunlight strength and water temperature and speed, automatic adjustment blower air quantity, blowing pattern, air inlet pattern, cold air
Door position and the discharge capacity of compressor keep vehicle interior temperature and humidity to reach best comfort in setting range, carried to passenger
For a good environment by bus.With the development of automobile industry, the direction of automatic air condition necessarily future automobile Air-conditioning Development.
Automatic air-conditioning system includes three parts：Sensor, ECU and executing agency, wherein sensor are responsible for needed for acquisition
Information, ECU calculated according to the information that sensor inputs, and executing agency finally performs the instruction that ECU is sent out.Thus may be used
See, the acquisition precision of information finally affects the comfort of user.
For outdoor temperature sensor due to being influenced by external environment, accuracy is to be most difficult in all information collections
Ensure.Existing outdoor temperature sensor is mounted on right rear view mirror, although reducing heat radiation and the front end of enging cabin
Influence of the module to sensor, but measured value for not considering engine coolant, speed and current outdoor temperature etc. because
Element, therefore the outdoor temp angle value surveyed by sensor is inaccurate.
Invention content
In view of the deficienciess of the prior art, the object of the present invention is to provide a kind of measuring method of outdoor automobile temperature,
Its design is simple, result is accurate.
The technical solution adopted in the present invention is：A kind of measuring method of outdoor automobile temperature, is characterized in that,
(1) influence of the engine coolant temperature to outdoor automobile temperature is first determined whether, detailed process is as follows：
If the engine coolant temperature value received by CAN bus<56 DEG C, however, it is determined that enging cabin does not have shadow to outdoor temperature
It rings, then recording outdoor temperature is：The outdoor temperature measured value of sensor acquisition；
If engine coolant temperature value >=56 DEG C received by CAN bus, however, it is determined that enging cabin has shadow to outdoor temperature
It rings, then recording outdoor temperature is：Memory temperature value before automobile starting；
(2) secondly, judge the influence of outdoor temperature, detailed process is as follows：
If outdoor temperature measured value<- 20 DEG C, and speed does not influence outdoor temperature, then record outdoor temperature is again：It passes
The outdoor temperature measured value of sensor acquisition, performs step (6)；
If outdoor temperature measured value >=-20 DEG C, the outdoor temp angle value recorded is further verified, performs step (3)；
(3) it is as follows to verify the process of outdoor temp angle value recorded：
If the outdoor temp angle value recorded<- 20 DEG C, then ignore influence of the speed to practical outdoor temperature at this time, new record of laying equal stress on
Outdoor temp angle value at this time is：The outdoor temperature measured value of sensor acquisition, performs step (6)；
If outdoor temp angle value >=-20 DEG C recorded, the variation tendency of temperature is further judged, perform step (4)；
(4) judge temperature trend, detailed process is：
If the outdoor temp angle value recorded is bigger than collected outdoor temperature measured value, i.e., temperature reduces, then again outside recording room
Temperature is：Outdoor temp angle value+the fTH* (outdoor temperature measured value-recorded outdoor temp angle value) recorded, in formula, fTH is
Proportionality coefficient；Perform step (6)；
If the outdoor temp angle value recorded is smaller than collected outdoor temperature measured value, i.e., temperature increases, and performs step (5), into
One step judges speed；
(5) judge Vehicle Speed, detailed process is：
If speed<30kph, outdoor temp angle value are：Outdoor temp angle value+the fT* recorded be (outdoor temperature measured value-recorded
Outdoor temp angle value), in formula, fT is proportionality coefficient；Perform step (6)；
If speed >=30kph, outdoor temp angle value=recorded outdoor temp angle value+FTH* (outdoor temperature measured value-has recorded
Outdoor temp angle value), FTH is proportionality coefficient；
(6) terminate.
Determine that influential method is enging cabin on outdoor temperature：
Experiment vehicle is parked in the wind tunnel experiment cabin of constant temperature, starts vehicle monitoring coolant temperature, when the outdoor temperature of acquisition
When sensor temperature increases, determine that outdoor temperature during this temperature receives the influence of coolant temperature.
Determine that influential method is speed on outdoor temperature：
Experiment vehicle is parked in the wind tunnel experiment cabin of temperature-changeable, by changing speed, whether monitoring outdoor temperature changes, and works as wind
When temperature is less than a certain value in the Laboratory Module of hole, then illustrate that changing speed has an impact outdoor temperature.
The beneficial effects of the invention are as follows：The measuring method of the outdoor automobile temperature, it is contemplated that water temperature, speed and current outdoor
Influence of the factors such as the measured value of temperature to outdoor temperature, the method for the present invention can reduce external environment to outdoor to greatest extent
The influence of temperature obtains accurate outdoor temp angle value.
Description of the drawings
It in order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Other attached drawings.
Fig. 1 is structure diagram in the embodiment of the present invention；
Fig. 2 is the measuring method flow chart of outdoor automobile temperature in the embodiment of the present invention.
Specific embodiment
Enable the above objects, features and advantages of the present invention more obvious understandable, below in conjunction with the accompanying drawings 1~Fig. 2 and tool
The present invention is described in further detail for body embodiment.
Embodiment：
The measuring method of outdoor automobile temperature in the present embodiment, is applied in automatic air-conditioning system as shown in Figure 1.User is led to
Cross operation multimedia screen（MDU, Multimedia Display Unit）Set temperature is adjusted, fiducial temperature setting value is 22
DEG C, which is sent to automatic air condition control module by CAN bus（CCU, Climate Control Unit）.Simultaneously
Gateway（GW, Gate Way）By engine control system（EMS, Engine Management System）Speed, rotating speed
Be sent to CCU with the routing of the CAN signals such as water temperature, at the same CCU by rigid line acquire pressure sensor, evaporator temperature sensor,
Indoor temperature transmitter, sunlight sensor and outdoor temperature sensor, so as to obtain air-conditioning system pressure, evaporator temperature, room
Interior temperature, sunlight strength and outdoor temperature, by automatic air condition algorithm calculate the air quantity of air blower in HVAC, blowing pattern,
The discharge capacity of air inlet pattern, changes in temperature damper positions and compressor keeps vehicle interior temperature and humidity to reach best in setting range
Comfort provides a good environment by bus to passenger.In rearview mirror side, setting outdoor temperature sensor acquires outdoor automobile
Temperature, flow is as shown in Fig. 2, specifically include following steps：
First before the start of the measurement, the state of automobile power source is first judged, if power supply is closed（That is IGN OFF）, then record at this time
The outdoor temp angle value that outdoor temperature records when being powered off for automobile last time, the outdoor temperature are also referred to as memory temperature value（Tam）.
If electric power starting（IGN ON）, then further judge water temperature：
(1) it first determines whether influence of the engine coolant temperature to outdoor automobile temperature, intermediate variable is set to make in the present embodiment
To record the carrier of outdoor temperature, it is temporary temperature value Ta to define the intermediate variable, then detailed process is as follows：
If the engine coolant temperature value received by CAN bus<56 DEG C, however, it is determined that enging cabin does not have shadow to outdoor temperature
It rings, then the outdoor temperature measured value Tamb of Ta=sensor acquisition；
If engine coolant temperature value >=56 DEG C received by CAN bus, however, it is determined that enging cabin has shadow to outdoor temperature
It rings, then Ta=memory temperature value Tam.
Determine that whether influential process is enging cabin on outdoor temperature：Experiment vehicle is parked in the wind tunnel experiment of constant temperature
In cabin, start vehicle monitoring coolant temperature, when the outdoor temperature sensor temperature raising of acquisition, record coolant temperature at this time
Degree judges that temperature receives the influence of coolant temperature outside during this temperature.
(2) secondly, judge the influence of outdoor temperature measured value Tamb, detailed process is as follows：
If outdoor temperature measured value Tamb<- 20 DEG C, and speed does not influence outdoor temperature, then Ta=outdoor temperature measured value
Tamb；Perform step (6)；
If outdoor temperature measured value Tamb >=-20 DEG C, Ta is further verified, performs step (3).
(3) process for verifying Ta is as follows：
If Ta<- 20 DEG C, then ignore influence of the speed to practical outdoor temperature at this time, then Ta=outdoor temperature measured value Tamb；It holds
Row step (6)；
If Ta >=-20 DEG C, the variation tendency of temperature is further judged, perform step (4)；
(4) judge temperature trend, detailed process is：
If Ta-Tamb >=0, i.e., temperature reduces, then Ta should be：
Ta+fTH(Tamb-Ta)
In formula, fTH is by testing the proportionality coefficient measured, and it is as follows that fTH specifically tests process：Experiment vehicle is parked in known
In the alternating temperature wind tunnel experiment cabin of temperature, by the comparison with true temperature, push over and obtain this coefficient.
Perform step (6)；
If Ta-Tamb ＜ 0, i.e. temperature are increased, step (5) is performed, further judges speed.
(5) judge Vehicle Speed, detailed process is：
If vehicle velocity V c<30kph, Ta are：
Ta+fT(Tamb-Ta)
In formula, fT is proportionality coefficient, determines that the process of proportionality coefficient fT is as follows：Alternating temperature wind-tunnel of the vehicle in known temperature will be tested
It is being run in Laboratory Module with the speed of 60kph, by the comparison with true temperature, is pushing over and obtain this coefficient；
Perform step (6)；
If vehicle velocity V c >=30kph, Ta are：
Ta=Ta+FTH(Tamb-Ta)
In formula, FTH is proportionality coefficient；Specifically derivation is：By experiment vehicle in the alternating temperature wind tunnel experiment cabin of known temperature
The interior speed with 15kph is being run, and by the comparison with true temperature, is pushed over and is obtained this coefficient.
(6) storage terminates by the temperature value Tam=Ta measured.
Although specific embodiments of the present invention have been described above, those skilled in the art in the art should manage
Solution, these are merely examples, and many changes and modifications may be made, without departing from the principle of the present invention
And essence.The scope of the present invention is only limited by the claims that follow.
Claims (3)
1. a kind of measuring method of outdoor automobile temperature, which is characterized in that
(1) influence of the engine coolant temperature to outdoor automobile temperature is first determined whether, detailed process is as follows：
If the engine coolant temperature value received by CAN bus<56 DEG C, however, it is determined that enging cabin does not have shadow to outdoor temperature
It rings, then recording outdoor temperature is：The outdoor temperature measured value of sensor acquisition；
If engine coolant temperature value >=56 DEG C received by CAN bus, however, it is determined that enging cabin has shadow to outdoor temperature
It rings, then recording outdoor temperature is：Memory temperature value before automobile starting；
(2) secondly, judge the influence of outdoor temperature, detailed process is as follows：
If outdoor temperature measured value<- 20 DEG C, and speed does not influence outdoor temperature, then record outdoor temperature is again：It passes
The outdoor temperature measured value of sensor acquisition, performs step (6)；
If outdoor temperature measured value >=-20 DEG C, the outdoor temp angle value recorded is further verified, performs step (3)；
(3) it is as follows to verify the process of outdoor temp angle value recorded：
If the outdoor temp angle value recorded<- 20 DEG C, then ignore influence of the speed to practical outdoor temperature at this time, new record of laying equal stress on
Outdoor temp angle value at this time is：The outdoor temperature measured value of sensor acquisition, performs step (6)；
If outdoor temp angle value >=-20 DEG C recorded, the variation tendency of temperature is further judged, perform step (4)；
(4) judge temperature trend, detailed process is：
If the outdoor temp angle value recorded is bigger than collected outdoor temperature measured value, i.e., temperature reduces, then again outside recording room
Temperature is：Outdoor temp angle value+the fTH* (outdoor temperature measured value-recorded outdoor temp angle value) recorded, in formula, fTH is
Proportionality coefficient；Perform step (6)；
If the outdoor temp angle value recorded is smaller than collected outdoor temperature measured value, i.e., temperature increases, and performs step (5), into
One step judges speed；
(5) judge Vehicle Speed, detailed process is：
If speed<30kph, outdoor temp angle value are：Outdoor temp angle value+the fT* recorded be (outdoor temperature measured value-recorded
Outdoor temp angle value), in formula, fT is proportionality coefficient；Perform step (6)；
If speed >=30kph, outdoor temp angle value=recorded outdoor temp angle value+FTH* (outdoor temperature measured value-has recorded
Outdoor temp angle value), FTH is proportionality coefficient；
(6) terminate.
2. the measuring method of outdoor automobile temperature as described in claim 1, which is characterized in that determine enging cabin to outdoor temp
Spending influential method is：
Experiment vehicle is parked in the wind tunnel experiment cabin of constant temperature, starts vehicle monitoring coolant temperature, when the outdoor temperature of acquisition
When sensor temperature increases, determine that outdoor temperature during this temperature receives the influence of coolant temperature.
3. the measuring method of outdoor automobile temperature as described in claim 1, which is characterized in that determine that speed has outdoor temperature
The method of influence is：
Experiment vehicle is parked in the wind tunnel experiment cabin of temperature-changeable, by changing speed, whether monitoring outdoor temperature changes, and works as wind
When temperature is less than a certain value in the Laboratory Module of hole, then illustrate that changing speed has an impact outdoor temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201611213711.2A CN108240875A (en) | 2016-12-26 | 2016-12-26 | A kind of measuring method of outdoor automobile temperature |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611213711.2A CN108240875A (en) | 2016-12-26 | 2016-12-26 | A kind of measuring method of outdoor automobile temperature |
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| CN108240875A true CN108240875A (en) | 2018-07-03 |
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| CN201611213711.2A Pending CN108240875A (en) | 2016-12-26 | 2016-12-26 | A kind of measuring method of outdoor automobile temperature |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109839206A (en) * | 2019-03-28 | 2019-06-04 | 麦格纳斯太尔汽车技术（上海）有限公司 | A kind of vehicle-mounted outer temperature measurement correction system |
| CN110307911A (en) * | 2019-06-12 | 2019-10-08 | 河海大学 | A kind of method of air themperature in calculating access tunnel |
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| JPH01212637A (en) * | 1988-02-19 | 1989-08-25 | Yazaki Corp | Electronic type outside air temperature meter for vehicle |
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Non-Patent Citations (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109839206A (en) * | 2019-03-28 | 2019-06-04 | 麦格纳斯太尔汽车技术（上海）有限公司 | A kind of vehicle-mounted outer temperature measurement correction system |
| CN110307911A (en) * | 2019-06-12 | 2019-10-08 | 河海大学 | A kind of method of air themperature in calculating access tunnel |
| CN110307911B (en) * | 2019-06-12 | 2021-02-12 | 河海大学 | Method for calculating air temperature in traffic hole |
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Effective date of abandoning: 20210528 |
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