CN103625396A - Out-temperature acquisition and display method - Google Patents
Out-temperature acquisition and display method Download PDFInfo
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- CN103625396A CN103625396A CN201310664888.4A CN201310664888A CN103625396A CN 103625396 A CN103625396 A CN 103625396A CN 201310664888 A CN201310664888 A CN 201310664888A CN 103625396 A CN103625396 A CN 103625396A
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Abstract
The invention discloses an out-temperature acquisition and display method, which comprises the following steps of: S1. acquiring outside ambient temperature by an out-temperature sensor to obtain current out-temperature sample data; S2.compensating the current out-temperature sample data according to the current vehicle state and engine coolant temperature/vehicle speed to obtain current out-temperature display data on the current outside temperature compensated sampled data to obtain current out-temperature display data and displaying the data by an in-vehicle display terminal. According to the invention, the impact of an engine and the vehicle speed on the temperature sensor can be reduced, so that the out-temperature can be displayed more accurately.
Description
Technical field
The present invention relates to automotive temp collection and technique of display field, relate in particular to the outer temperature acquisition of car and display method.
Background technology
In most cases, automobile possesses the function of measuring temperature in car and outside car, the method of the outer temperature of general measure car is that temperature sensor is arranged on the safety lever of headstock, and the temperature information of sensor collection is sent to the upper demonstration of display terminal in car (being generally combination instrument in car).But temperature sensor is arranged on the safety lever of headstock, temperature sensor is easily subject to the impact of heat of engine, the speed of a motor vehicle, cause the temperature information of collection inaccurate.And different in the situation that, it is also different that the outer temperature sensor of car is subject to above factor effect, such as:
While 1, again starting (startup of instant heating starter motor) when stopping less than 2 hours, the impact that the outer temperature sensor of car is subject to heat of engine is very large, and the outer temperature of the temperature now collecting and actual car differs larger, causes temperature reading inaccurate.
2, stop and surpass 2 hours (being that cold start-up machine starts), while again starting, the impact that the outer temperature sensor of car is subject to heat of engine is very little, and the outer temperature of the temperature now collecting and actual car is approximately equal.
3,, when low vehicle speeds, the wind that headstock head-on blows, can reduce the impact of heat of engine on temperature sensor, but the temperature of the outer temperature sensor collection of car and actual car outward temperature still have difference, can not be equal to completely.
4, when high vehicle speeds, the now impact of the external temperature sensor of driving engine is very little, and the temperature that the outer temperature sensor of car collects of thinking that can be similar to is equal to the outer temperature of actual car.
5, in the situation of vehicle idling, now driving engine is along with time of idle running is longer and become hotter, and the heat of driving engine also can be larger on the impact of the outer temperature sensor of car.
Therefore, need to invent a kind of driving engine, speed of a motor vehicle of can reducing to the outer temperature acquisition of the car of temperature sensor impact and display method, the outer temperature of car be shown more accurate.
Summary of the invention
Embodiment of the present invention technical matters to be solved is, the outer temperature acquisition of a kind of car and display method are provided, and can reduce driving engine, the impact of the speed of a motor vehicle on temperature sensor, thereby it is more accurate that the outer temperature of car is shown.
In order to solve the problems of the technologies described above, the invention provides the outer temperature acquisition of a kind of car and display method, comprise step:
S1, by the outer temperature sensor of car, car external environment temperature is gathered, thereby obtain the outer temperature sampling data of current car;
S2, according to current vehicle-state and engine coolant temperature/speed of a motor vehicle, the outer temperature sampling data of described current car are compensated to obtain the outer temperature of current car and show data, and show by display terminal in car.
Wherein, step S2 specifically comprises:
S21, when vehicle is during in starting state, read in car engine coolant temperature data on water thermometer, and according to described engine coolant temperature data and the outer temperature sampling data M of described current car
samplingpoor judgement vehicle belong to that warm engine starts or cold engine starts, if cold engine starts, the outer temperature of current car shows that data are: N
current=M
sampling; If warm engine starts, judge whether the outer temperature sampling data of described current car are greater than an outer temperature of car constantly and show data, if so, the current outer temperature demonstration of car data are: N
current=N
upper one constantly, otherwise the outer temperature of current car shows that data are: N
current=M
sampling;
S22, when vehicle during in normal operation state and vehicle idling or the speed of a motor vehicle lower than low speed threshold value or be greater than low speed threshold value but time length while being less than time threshold, judge whether the aviation value of the outer temperature sampling data of car of nearest n time is greater than the outer temperature demonstration of the car data in a moment, if so, the outer temperature of current car shows that data are: N
current=N
upper one constantly, otherwise the outer temperature of current car shows that data are: N
current=N
upper one constantly-A; Or
S23, when vehicle is during in normal operation state and when vehicle speed is greater than low speed threshold value time length and is greater than time threshold, judge whether the aviation value of the outer temperature sampling data of car of nearest n time is greater than the outer temperature demonstration of the car data in a moment, if so, the outer temperature of current car shows that data are: N
current=N
upper one constantly+ B; Otherwise the outer temperature of current car shows that data are: N
current=N
upper one constantly-C;
Wherein, M
samplingfor the outer temperature sampling data of current car, N
currentfor the outer temperature of current car shows data, N
upper one constantlyfor the outer temperature demonstration of the car data in a upper moment, A, B, C are default compensation temperature data.
Wherein, step S1 specifically comprises step:
S11, for the car external environment temperature of the outer temperature sensor collection of car, take 50ms and sample as the cycle;
S12, calculate the aviation value of the ambient temperature of continuous 50 described samplings, to obtain the outer temperature sampling data of a described current car.
Further, in described step S21, outside described engine coolant temperature data and described current car, the difference of temperature sampling data meets: T
water temperature-M
samplingduring≤D, for cold engine starts, otherwise be warm engine startup; Wherein, T
water temperaturefor described engine coolant temperature data, D is default temperature threshold, and is preferably 10 ℃.
Preferably, described default compensation temperature data A is 1 ℃, and described default compensation temperature data C is preferably 1 ℃.
Preferably, described default compensation temperature data B has two values, is specially: when car speed is between low speed threshold value and High Speed Threshold, described default compensation temperature data B is preferably 0.2 ℃; When car speed is greater than High Speed Threshold, preferably 1 ℃ of described default compensation temperature data B.
Further, in described step S21, the outer temperature of the car in a upper moment shows that the initialization step of data is:
When vehicle is starting state, if vehicle is initial start-up, storage battery is for opening for the first time, and the outer temperature of car that the outer temperature sampling data of the car of current time was saved as to a upper moment shows data; Otherwise read the outer temperature of the car of preserving when last time, vehicle launch storage battery was closed again after opening and show that data showed data as the outer temperature of car in a upper moment.
Further, the aviation value of the outer temperature sampling data of the car of nearest n time in described step S22 and S23, is the aviation value of temperature sampling data outside the common n train of n-1 time from current time plays, and described frequency n is preferably 10.
Further, described low speed threshold value is preferably 15km/h, and described High Speed Threshold is preferably 30km/h, and time threshold is preferably 1000s.
Implement the embodiment of the present invention, there is following beneficial effect:
1, having increased vehicle motor is the judgement that warm boot or cold machine start, and therefore can reduce the impact of warm engine on temperature acquisition and demonstration;
2, for the vehicle speed situation of dividing, process, adopt the mode of compensation data to make temperature demonstration more accurate, reduce the impact of vehicle speed on the demonstration of temperature acquisition.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the schematic flow sheet of the outer temperature acquisition of the car that provides of the embodiment of the present invention and display method;
Fig. 2 is the schematic flow sheet of the concrete steps of step S2 in Fig. 1;
Fig. 3 is the schematic flow sheet of the concrete steps of step S1 in Fig. 1;
Fig. 4 is the schematic diagram of the outer temperature sampling data of car of nearest 10 times;
Fig. 5 is the schematic flow sheet of temperature acquisition and display method outside the car of vehicle when starting state;
Fig. 6 is the schematic flow sheet of temperature acquisition and display method outside the car of vehicle when idle stop;
Fig. 7 is the schematic flow sheet of temperature acquisition and display method outside the car of vehicle when normal motoring condition.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention provides the outer temperature acquisition of a kind of car and display method, as shown in Figure 1, comprises step:
S1, by the outer temperature sensor of car, car external environment temperature is gathered, thereby obtain the outer temperature sampling data M of current car
sampling;
S2, according to current vehicle-state and engine coolant temperature/speed of a motor vehicle to the outer temperature sampling data M of described current car
samplingcompensate to obtain the outer temperature of current car and show data N
current, and show by display terminal in car.
Wherein, as shown in Figure 2, step S2 specifically comprises:
S21, when vehicle is during in starting state, read engine coolant temperature data on the interior water thermometer of car, and judge that according to the poor of described engine coolant temperature data and the outer temperature sampling data of described current car vehicle belongs to warm engine startup or cold engine starts, if cold engine starts, the outer temperature of current car shows that data are: N
current=M
sampling; If warm engine starts, judge whether the outer temperature sampling data of described current car are greater than an outer temperature of car constantly and show data, if so, the current outer temperature demonstration of car data are: N
current=N
upper one constantly, otherwise the outer temperature of current car shows that data are: N
current=M
sampling;
S22, when vehicle during in normal operation state and vehicle idling or the speed of a motor vehicle lower than low speed threshold value or be greater than low speed threshold value but time length while being less than time threshold, judge whether the aviation value of the outer temperature sampling data of car of nearest n time is greater than the outer temperature demonstration of the car data in a moment, if so, the outer temperature of current car shows that data are: N
current=N
upper one constantly, otherwise the outer temperature of current car shows that data are: N
current=N
upper one constantly-A;
S23, when vehicle is during in normal operation state and when vehicle speed is greater than low speed threshold value time length and is greater than time threshold, judge whether the aviation value of the outer temperature sampling data of car of nearest n time is greater than the outer temperature demonstration of the car data in a moment, if so, the outer temperature of current car shows that data are: N
current=N
upper one constantly+ B; Otherwise the outer temperature of current car shows that data are: N
current=N
upper one constantly-C;
Wherein, M
samplingfor the outer temperature sampling data of current car, N
currentfor the outer temperature of current car shows data, N
upper one constantlyfor the outer temperature demonstration of the car data in a upper moment, A, B, C are default compensation temperature data.
Wherein, as shown in Figure 3, step S1 specifically comprises step:
S11, for the car external environment temperature of the outer temperature sensor collection of car, take 50ms and sample as the cycle;
S12, calculate the aviation value of the ambient temperature of continuous 50 described samplings, to obtain the outer temperature sampling data of a described current car.The cycle of the outer temperature sampling data of car is 50 * 50ms=2.5s.
Further, in described step S21, outside described engine coolant temperature data and described current car, the difference of temperature sampling data meets: T
water temperature-M
samplingduring≤D, for cold engine starts, otherwise be warm engine startup; Wherein, T
water temperaturefor described engine coolant temperature data, D is default temperature threshold, and is preferably 10 ℃.
Preferably, described default compensation temperature data A is 1 ℃, and described default compensation temperature data C is preferably 1 ℃.
Preferably, described default compensation temperature data B has two values, is specially: when car speed is between low speed threshold value and High Speed Threshold, described default compensation temperature data B is preferably 0.2 ℃; When car speed is greater than High Speed Threshold, preferably 1 ℃ of described default compensation temperature data B.
Further, in described step S21, the outer temperature of the car in a upper moment shows that the initialization step of data is:
When vehicle is starting state, storage battery is opened, and opens and continue to start temperature data outside sampling vehicle after 100ms at storage battery, if vehicle is initial start-up, storage battery is for opening for the first time, and the outer temperature of car that the outer temperature sampling data of the car of current time was saved as to a upper moment shows data; Otherwise read the outer temperature of the car of preserving when last time, vehicle launch storage battery was closed again after opening and show that data showed data as the outer temperature of car in a upper moment.
Further, as described in Figure 4, the aviation value of the outer temperature sampling data of the car of nearest n time in described step S22 and S23, is the aviation value of temperature sampling data outside the common n train of n-1 time from current time plays, and described frequency n is preferably 10.
Further, described low speed threshold value is preferably 15km/h, and described High Speed Threshold is preferably 30km/h, and time threshold is preferably 1000s.
Below, in conjunction with describing in detail when the different state of vehicle in front, the outer temperature acquisition of car of the present invention and display method how according to current vehicle-state and engine coolant temperature/speed of a motor vehicle to the outer temperature sampling data M of described current car
samplingcompensate to obtain the outer temperature of current car and show data N
current.
1, as shown in Figure 5, when vehicle is during in starting state:
(1) the outer temperature of car shows data N
upper one constantlyinitialization procedure be: storage battery (or storage battery disconnect reconnect) from closed condition to open mode, and open and continue to start temperature data outside sampling vehicle after 100ms at storage battery, if vehicle is initial start-up, storage battery, for opening for the first time, is protected M by the outer temperature sampling data of the car of current time
samplingthe outer temperature of car that saves as a moment shows data N
upper one constantly; Otherwise read the outer temperature of the car of preserving when last time, vehicle launch storage battery was closed again after opening and show that data showed data N as the outer temperature of car in a upper moment
upper one constantly.
(2) read engine coolant temperature data T on the interior water thermometer of car
water temperatureif, T
water temperature-M
sampling≤ 10 ℃, for cold engine starts, the outer temperature of current car shows that data are: N
current=M
sampling.
(3) if T
water temperature-M
sampling>10 ℃, for warm engine starts, if the outer temperature sampling data M of current car
samplingthe outer temperature of car that is greater than a moment shows data N
upper one constantly, the outer temperature of current car shows that data are: N
current=N
upper one constantly, otherwise the outer temperature of current car shows that data are: N
current=M
sampling.
(4) after normal demonstration, if storage battery power-off shows data preservation by the outer temperature of current car.
2, as shown in Figure 6, when vehicle is when stopping idling mode:
Judge the aviation value M of the outer temperature sampling data of car of nearest 10 times
sample meanwhether be greater than an outer temperature of car constantly and show data, if so, the current outer temperature of car shows that data remain unchanged, and is N
current=N
upper one constantly, otherwise the outer temperature of current car shows that data decline 1 ℃, is N
current=N
upper one constantly-1 ℃.
3, as shown in Figure 7, when normal vehicle operation:
(1), when vehicle speed is less than that 15km/h or the speed of a motor vehicle are greater than 15km/h but time length while being less than 1000s, the processing with vehicle when stopping idling mode is consistent;
(2) when the speed of a motor vehicle is greater than 15km/h and time length and surpasses 1000s:
If the aviation value M of the outer temperature sampling data of the car of nearest 10 times
sample meanbe greater than N
upper one constantly,, when car speed is between 15km/h and 30km/h, the outer temperature of current car shows that data rise 0.2 ℃, N
current=N
upper one constantly+ 0.2 ℃; When car speed is greater than 30km/h, the outer temperature of current car shows that data rise 1 ℃, N
current=N
upper one constantly+ 1 ℃;
If the aviation value M of the outer temperature sampling data of the car of nearest 10 times
sample meanbe less than or equal to N
upper one constantly, the outer temperature of current car shows that data decline 1 ℃, is N
current=N
upper one constantly-1 ℃.
Implement the embodiment of the present invention, there is following beneficial effect:
1, having increased vehicle motor is the judgement that warm boot or cold machine start, and therefore can reduce the impact of warm engine on temperature acquisition and demonstration;
2, for the vehicle speed situation of dividing, process, adopt the mode of compensation data to make temperature demonstration more accurate, reduce the impact of vehicle speed on the demonstration of temperature acquisition.
Above disclosed is only a kind of preferred embodiment of the present invention, certainly can not limit with this interest field of the present invention, and the equivalent variations of therefore doing according to the claims in the present invention, still belongs to the scope that the present invention is contained.
Claims (10)
1. the outer temperature acquisition of car and a display method, is characterized in that, comprises step:
S1, by the outer temperature sensor of car, car external environment temperature is gathered, thereby obtain the outer temperature sampling data of current car;
S2, according to current vehicle-state and engine coolant temperature/speed of a motor vehicle, the outer temperature sampling data of described current car are compensated to obtain the outer temperature of current car and show data, and show by display terminal in car.
2. the outer temperature acquisition of car as claimed in claim 1 and display method, is characterized in that, described step S2 specifically comprises step:
S21, when vehicle is during in starting state, read in car engine coolant temperature data on water thermometer, and according to described engine coolant temperature data and the outer temperature sampling data M of described current car
samplingpoor judgement vehicle belong to that warm engine starts or cold engine starts, if cold engine starts, the outer temperature of current car shows that data are: N
current=M
sampling; If warm engine starts, judge whether the outer temperature sampling data of described current car are greater than an outer temperature of car constantly and show data, if so, the current outer temperature demonstration of car data are: N
current=N
upper one constantly, otherwise the outer temperature of current car shows that data are: N
current=M
sampling;
S22, when vehicle during in normal operation state and vehicle idling or the speed of a motor vehicle lower than low speed threshold value or be greater than low speed threshold value but time length while being less than time threshold, judge whether the aviation value of the outer temperature sampling data of car of nearest n time is greater than the outer temperature demonstration of the car data in a moment, if so, the outer temperature of current car shows that data are: N
current=N
upper one constantly, otherwise the outer temperature of current car shows that data are: N
current=N
upper one constantly-A; Or
S23, when vehicle is during in normal operation state and when vehicle speed is greater than low speed threshold value time length and is greater than time threshold, judge whether the aviation value of the outer temperature sampling data of car of nearest n time is greater than the outer temperature demonstration of the car data in a moment, if so, the outer temperature of current car shows that data are: N
current=N
upper one constantly+ B; Otherwise the outer temperature of current car shows that data are: N
current=N
upper one constantly-C;
Wherein, M
samplingfor the outer temperature sampling data of current car, N
currentfor the outer temperature of current car shows data, N
upper one constantlyfor the outer temperature demonstration of the car data in a upper moment, A, B, C are default compensation temperature data.
3. the outer temperature acquisition of car as claimed in claim 1 and display method, is characterized in that, described step S1 specifically comprises step:
S11, for the car external environment temperature of the outer temperature sensor collection of car, take 50ms and sample as the cycle;
S12, calculate the aviation value of the ambient temperature of continuous 50 described samplings, to obtain the outer temperature sampling data of a described current car.
4. the outer temperature acquisition of car as claimed in claim 2 and display method, is characterized in that, in described step S21, outside described engine coolant temperature data and described current car, the difference of temperature sampling data meets: T
water temperature-M
samplingduring≤D, for cold engine starts, otherwise be warm engine startup;
Wherein, T
water temperaturefor described engine coolant temperature data, D is default temperature threshold, and is preferably 10 ℃.
5. the outer temperature acquisition of car as claimed in claim 2 and display method, is characterized in that, described default compensation temperature data A is preferably 1 ℃.
6. the outer temperature acquisition of car as claimed in claim 2 and display method, is characterized in that, described default compensation temperature data C is preferably 1 ℃.
7. the outer temperature acquisition of car as claimed in claim 2 and display method, it is characterized in that, described default compensation temperature data B has two values, is specially: when car speed is between low speed threshold value and High Speed Threshold, described default compensation temperature data B is preferably 0.2 ℃; When car speed is greater than High Speed Threshold, preferably 1 ℃ of described default compensation temperature data B.
8. the outer temperature acquisition of car as claimed in claim 2 and display method, is characterized in that, in described step S21, the outer temperature of the car in a upper moment shows that the initialization step of data is:
When vehicle is starting state, if vehicle is initial start-up, storage battery is for opening for the first time, and the outer temperature of car that the outer temperature sampling data of the car of current time was saved as to a upper moment shows data; Otherwise read the outer temperature of the car of preserving when last time, vehicle launch storage battery was closed again after opening and show that data showed data as the outer temperature of car in a upper moment.
9. the outer temperature acquisition of car as claimed in claim 2 and display method, it is characterized in that, the aviation value of the outer temperature sampling data of the car of nearest n time in described step S22 and S23, for the aviation value of temperature sampling data outside the common n train of n-1 time from current time plays, described frequency n is preferably 10.
10. the outer temperature acquisition of the car as described in any one in claim 1-9 and display method, is characterized in that, described low speed threshold value is preferably 15km/h, and described High Speed Threshold is preferably 30km/h, and time threshold is preferably 1000s.
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| CN104833442A (en) * | 2014-04-21 | 2015-08-12 | 北汽福田汽车股份有限公司 | Vehicle-outside-temperature detection method for vehicle, and system |
| CN105278578A (en) * | 2015-10-20 | 2016-01-27 | 浪潮电子信息产业股份有限公司 | Inlet air temperature correction method based on rotation speed of fan |
| CN106438013A (en) * | 2016-08-10 | 2017-02-22 | 惠州市德赛西威汽车电子股份有限公司 | Automobile cooling fluid temperature detection method and device thereof |
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| CN106679850A (en) * | 2017-01-03 | 2017-05-17 | 深圳市蜂联科技有限公司 | Method of improving temperature measuring accuracy during the thermal starting process of air box |
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| CN112539856A (en) * | 2020-11-20 | 2021-03-23 | 奇瑞商用车（安徽）有限公司 | Method for compensating environmental temperature for vehicle |
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| CN104833442A (en) * | 2014-04-21 | 2015-08-12 | 北汽福田汽车股份有限公司 | Vehicle-outside-temperature detection method for vehicle, and system |
| CN105278578A (en) * | 2015-10-20 | 2016-01-27 | 浪潮电子信息产业股份有限公司 | Inlet air temperature correction method based on rotation speed of fan |
| CN106438013B (en) * | 2016-08-10 | 2018-10-30 | 惠州市德赛西威汽车电子股份有限公司 | A kind of vehicle water temp detection method and its device |
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| CN107539064A (en) * | 2017-10-30 | 2018-01-05 | 重庆长安汽车股份有限公司 | Air conditioning for automobiles environment temperature judges system |
| CN107813676A (en) * | 2017-10-30 | 2018-03-20 | 重庆长安汽车股份有限公司 | Air conditioning for automobiles environment temperature judges system |
| CN107813676B (en) * | 2017-10-30 | 2021-02-05 | 重庆长安汽车股份有限公司 | Automobile air conditioner ambient temperature judging system |
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| CN112744087A (en) * | 2020-04-08 | 2021-05-04 | 长城汽车股份有限公司 | Ambient temperature determination method, motor controller, control system, and storage medium |
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| CN112744087B (en) * | 2020-04-08 | 2022-02-25 | 长城汽车股份有限公司 | Ambient temperature determination method, motor controller, control system, and storage medium |
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