Vehicle outside temperature acquisition method, device, equipment, medium and program product

Abstract

The present invention provides a method, device, equipment, medium and program product for obtaining vehicle outside temperature, which relates to the technical field of vehicle temperature acquisition. The method includes: in response to the vehicle being awakened, obtaining the initial vehicle outside temperature of the vehicle, the initial vehicle outside temperature is the vehicle outside temperature before the vehicle last went into sleep; determining whether the compressor of the vehicle is in working state; if not, determining the target vehicle outside temperature according to the exhaust pressure, exhaust temperature, suction pressure, suction temperature and initial vehicle outside temperature of the compressor; if yes, determining the target vehicle outside temperature based on the light intensity, the vehicle's vehicle inside temperature and the front windshield temperature. The present invention can obtain the vehicle outside temperature more accurately, and the vehicle outside temperature sensor can be omitted, thereby reducing the vehicle cost.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle temperature collection, and in particular to a method, device, equipment, medium and program product for obtaining vehicle external temperature. Background Art

[0002] The outside temperature is one of the important parameters of a vehicle. For example, the outside temperature can be displayed on the vehicle instrument screen so that the driver can know the outside temperature in time, and can also be used for automatic adjustment of the working state of the vehicle air conditioner.

[0003] At present, the vehicle outside temperature is usually obtained by using an outside temperature sensor, and the obtained vehicle outside temperature is corrected based on the water temperature of the radiator to obtain the target vehicle outside temperature. However, the vehicle outside temperature obtained in the above manner is not accurate enough. Summary of the invention

[0004] The purpose of the present invention is to provide a method, device, equipment, medium and program product for obtaining the outside temperature of a vehicle, so as to solve the problem that the outside temperature of a vehicle obtained by the current method is not accurate enough.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A method for obtaining an outside vehicle temperature comprises: in response to a vehicle being awakened, obtaining an initial outside vehicle temperature of the vehicle, the initial outside vehicle temperature being the outside vehicle temperature before the vehicle was last dormant; determining whether a compressor of the vehicle is in operation; if not, determining a target outside vehicle temperature according to the exhaust pressure, exhaust temperature, intake pressure, intake temperature and initial outside vehicle temperature of the compressor; if so, determining the target outside vehicle temperature based on light intensity, the inside vehicle temperature and the front windshield temperature of the vehicle.

[0007] According to the above technical means, the relevant information used to determine the target outside temperature is fully considered, and the target outside temperature is calculated by comprehensively taking the relevant information into account. The outside temperature can be obtained more accurately, and the outside temperature sensor can be omitted, thereby reducing vehicle costs.

[0008] Furthermore, based on the light intensity, the vehicle's interior temperature and the windshield temperature, the target exterior temperature is determined, including: obtaining the temperature change rate of the windshield temperature; determining the total heat transfer power of the windshield based on the equivalent heat transfer model and temperature change rate of the windshield; determining the solar thermal radiation coefficient power based on the light intensity and the glass area of ​​the windshield; determining the interior temperature heat transfer power based on the interior temperature, the windshield temperature and the first heat transfer efficiency coefficient; determining the target exterior temperature based on the total heat transfer power, the solar thermal radiation coefficient power, the interior temperature heat transfer power, the windshield temperature and the second heat transfer efficiency coefficient.

[0009] Further, based on the total heat transfer power, the solar heat radiation coefficient power, the vehicle interior temperature heat transfer power, the front windshield temperature and the second heat transfer efficiency coefficient, the target vehicle exterior temperature is determined, including: determining the target vehicle exterior temperature according to the following formula:

[0010]

[0011] Among them, T ambient Indicates the target vehicle exterior temperature; P 总 Represents the total heat transfer power; P solar Indicates solar thermal radiation coefficient power; P cabin Indicates the heat transfer power of the vehicle interior temperature; T windshield Indicates the front windshield temperature; ф2 indicates the second heat exchange efficiency coefficient.

[0012] Furthermore, the first heat transfer efficiency coefficient is obtained in the following manner: according to the gear signal and the air outlet pattern of the vehicle's blower, the average wind speed of the inner surface of the front windshield is obtained; according to the temperature inside the vehicle and the speed of the vehicle, the first basic parameter of the air inside the vehicle is determined; according to the average wind speed, the structural dimensions of the front windshield and the first basic parameter, the first Reynolds number and the first Prandtl number of the heat exchange convection between the air inside the vehicle and the front windshield are determined; according to the first Reynolds number and the first Prandtl number, the first Nusselt number is obtained; according to the first Nusselt number and the first free heat transfer coefficient calibration value, the heat transfer coefficient of the internal temperature of the windshield is obtained; according to the heat transfer coefficient of the internal temperature of the windshield, the calibration value of the first heat transfer efficiency adjustment coefficient and the glass width of the windshield, the first heat transfer efficiency coefficient is obtained.

[0013] Furthermore, the second heat transfer efficiency coefficient is obtained in the following manner: according to the current outside temperature and the vehicle speed, the second basic parameter of the outside air is determined, and the current outside temperature is the target outside temperature obtained last time; according to the vehicle speed, the structural dimensions of the front windshield and the second basic parameter, the second Reynolds number and the second Prandtl number of the heat exchange convection between the outside air and the front windshield are determined; according to the second Reynolds number and the second Prandtl number, the second Nusselt number is obtained; according to the second Nusselt number and the second free heat transfer coefficient calibration value, the outside temperature heat transfer coefficient of the front windshield is obtained; according to the outside temperature heat transfer coefficient of the front windshield, the second heat transfer efficiency adjustment coefficient calibration value and the glass width of the front windshield, the second heat transfer efficiency coefficient is obtained.

[0014] Furthermore, the target outside temperature is determined based on the exhaust pressure, exhaust temperature, intake pressure, intake temperature and initial outside temperature of the compressor, including: if a first difference between the exhaust temperature and the intake temperature is less than or equal to a first temperature difference threshold, and a second difference between the exhaust pressure and the intake pressure is greater than the pressure difference threshold, then the target outside temperature is determined to be the average of the exhaust temperature and the intake temperature; if the first difference is greater than the first temperature difference threshold, and the second difference is less than or equal to the pressure difference threshold, then the target outside temperature is determined to be the target saturation temperature, and the target saturation temperature is obtained by querying the refrigerant physical property parameter table based on the exhaust pressure; if the first difference is greater than the first temperature difference threshold, and the second difference is greater than the pressure difference threshold, then the target outside temperature is determined to be the initial outside temperature.

[0015] Furthermore, the method for obtaining the outside vehicle temperature also includes: if the first difference is less than or equal to the first temperature difference threshold, and the second difference is less than or equal to the pressure difference threshold, then determining the target outside vehicle temperature as the minimum value among the average value, the target saturation temperature and the initial outside vehicle temperature.

[0016] Furthermore, the method for obtaining the outside vehicle temperature also includes: when the compressor is in working state, if the third difference between the inside vehicle temperature and the front windshield temperature is less than or equal to the second temperature difference threshold, and the duration of the third difference is greater than the duration threshold, then the target outside vehicle temperature is determined to be the minimum value among the average value, the target saturation temperature, the initial outside vehicle temperature and the front windshield temperature.

[0017] Furthermore, the method for obtaining the outside vehicle temperature also includes: obtaining the outside vehicle temperature at a preset time interval, preprocessing the outside vehicle temperature to obtain a target outside vehicle temperature, the preprocessing including filtering and / or limiting the rate of change of the outside vehicle temperature when the vehicle speed is less than a speed threshold; and outputting the target outside vehicle temperature.

[0018] A device for acquiring an outside vehicle temperature comprises: an acquisition module for acquiring an initial outside vehicle temperature of the vehicle in response to the vehicle being awakened, the initial outside vehicle temperature being the outside vehicle temperature before the vehicle was last dormant; a first determination module for determining whether a compressor of the vehicle is in operation; a second determination module for determining a target outside vehicle temperature based on the exhaust pressure, exhaust temperature, intake pressure, intake temperature and initial outside vehicle temperature of the compressor if not; and a third determination module for determining the target outside vehicle temperature based on light intensity, the vehicle's inside vehicle temperature and the front windshield temperature if yes.

[0019] Furthermore, the third determination module is specifically used to: obtain the temperature change rate of the windshield temperature; determine the total heat exchange power of the windshield based on the equivalent heat exchange model and temperature change rate of the windshield; determine the solar thermal radiation coefficient power based on the light intensity and the glass area of ​​the windshield; determine the in-vehicle temperature heat exchange power based on the in-vehicle temperature, the windshield temperature and the first heat exchange efficiency coefficient; determine the target outside vehicle temperature based on the total heat exchange power, the solar thermal radiation coefficient power, the in-vehicle temperature heat exchange power, the windshield temperature and the second heat exchange efficiency coefficient.

[0020] Further, when the third determination module is used to determine the target vehicle exterior temperature based on the total heat exchange power, the solar heat radiation coefficient power, the vehicle interior temperature heat exchange power, the front windshield temperature and the second heat exchange efficiency coefficient, it is specifically used to determine the target vehicle exterior temperature according to the following formula:

[0021]

[0022] Among them, T ambient Indicates the target vehicle exterior temperature; P 总 Represents the total heat transfer power; P solar Indicates the solar thermal radiation coefficient power; P cabin Indicates the heat transfer power of the vehicle interior temperature; T windshield Indicates the front windshield temperature; ф2 indicates the second heat exchange efficiency coefficient.

[0023] Furthermore, the third determination module is also used to obtain the first heat exchange efficiency coefficient in the following manner: according to the gear signal and the air outlet pattern of the vehicle's blower, the average wind speed of the inner surface of the front windshield is obtained; according to the temperature inside the vehicle and the speed of the vehicle, the first basic parameter of the air inside the vehicle is determined; according to the average wind speed, the structural dimensions of the front windshield and the first basic parameter, the first Reynolds number and the first Prandtl number of the heat exchange convection between the air inside the vehicle and the front windshield are determined; according to the first Reynolds number and the first Prandtl number, the first Nusselt number is obtained; according to the first Nusselt number and the first free heat transfer coefficient calibration value, the heat transfer coefficient of the internal temperature of the windshield is obtained; according to the heat transfer coefficient of the internal temperature of the windshield, the calibration value of the first heat transfer efficiency adjustment coefficient and the glass width of the windshield, the first heat transfer efficiency coefficient is obtained.

[0024] Furthermore, the third determination module is also used to obtain the second heat transfer efficiency coefficient in the following manner: determine the second basic parameter of the outside air according to the current outside temperature and the vehicle speed, the current outside temperature being the target outside temperature obtained last time; determine the second Reynolds number and the second Prandtl number of the heat exchange convection between the outside air and the windshield according to the vehicle speed, the structural dimensions of the windshield and the second basic parameter; obtain the second Nusselt number according to the second Reynolds number and the second Prandtl number; obtain the outside temperature heat transfer coefficient of the windshield according to the second Nusselt number and the second free heat transfer coefficient calibration value; obtain the second heat transfer efficiency coefficient according to the outside temperature heat transfer coefficient of the windshield, the second heat transfer efficiency adjustment coefficient calibration value and the glass width of the windshield.

[0025] Further, the second determination module is specifically used for: if the first difference between the exhaust temperature and the intake temperature is less than or equal to the first temperature difference threshold, and the second difference between the exhaust pressure and the intake pressure is greater than the pressure difference threshold, then the target outside temperature is determined to be the average of the exhaust temperature and the intake temperature; if the first difference is greater than the first temperature difference threshold, and the second difference is less than or equal to the pressure difference threshold, then the target outside temperature is determined to be the target saturation temperature, and the target saturation temperature is obtained by querying the refrigerant physical property parameter table based on the exhaust pressure; if the first difference is greater than the first temperature difference threshold, and the second difference is greater than the pressure difference threshold, then the target outside temperature is determined to be the initial outside temperature.

[0026] Furthermore, the second determination module is also used to: if the first difference is less than or equal to the first temperature difference threshold, and the second difference is less than or equal to the pressure difference threshold, determine the target outside temperature as the minimum value among the average value, the target saturation temperature and the initial outside temperature.

[0027] Furthermore, the third determination module is also used for: when the compressor is in working state, if the third difference between the temperature inside the vehicle and the temperature of the front windshield is less than or equal to the second temperature difference threshold, and the duration of the third difference is greater than the duration threshold, then the target outside temperature is determined to be the minimum value among the average value, the target saturation temperature, the initial outside temperature and the front windshield temperature.

[0028] Furthermore, the device for acquiring the outside temperature of the vehicle also includes a processing module, which is used to: acquire the outside temperature of the vehicle at preset time intervals, preprocess the outside temperature of the vehicle, and obtain a target outside temperature of the vehicle, wherein the preprocessing includes filtering processing and / or limiting the rate of change of the outside temperature when the vehicle speed is less than a speed threshold; and output the target outside temperature of the vehicle.

[0029] A vehicle comprises a vehicle body, front wheels and rear wheels, wherein the vehicle body is arranged between the front wheels and the rear wheels; the vehicle also comprises an outside temperature acquisition device as described above in the present invention arranged on the vehicle body.

[0030] An electronic device includes: a processor, and a memory connected to the processor in communication; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the vehicle outside temperature acquisition method as described above in the present invention.

[0031] A computer-readable storage medium stores computer program instructions. When the computer program instructions are executed, the vehicle exterior temperature acquisition method described above is implemented.

[0032] A computer program product includes a computer program. When the computer program is executed, the method for obtaining the vehicle outside temperature as described above in the present invention is implemented.

[0033] Beneficial effects of the present invention: The vehicle outside temperature acquisition method, device, equipment, medium and program product provided by the present invention acquire the initial vehicle outside temperature of the vehicle in response to the vehicle being awakened, and the initial vehicle outside temperature is the vehicle outside temperature before the vehicle last went into sleep; determine whether the compressor of the vehicle is in working state, if not, determine the target vehicle outside temperature according to the exhaust pressure, exhaust temperature, intake pressure, intake temperature and initial vehicle outside temperature of the compressor; if so, determine the target vehicle outside temperature based on the light intensity, the vehicle's interior temperature and the front windshield temperature. The present invention fully considers the relevant information for determining the target vehicle outside temperature, and obtains the target vehicle outside temperature by comprehensively taking values ​​of the relevant information, so that the vehicle outside temperature can be obtained more accurately, and the vehicle outside temperature sensor can be omitted, thereby reducing the vehicle cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0035] Figure 1 A flow chart of a method for obtaining vehicle external temperature provided by an embodiment of the present invention;

[0036] Figure 2 A flow chart of a method for obtaining vehicle external temperature provided by another embodiment of the present invention;

[0037] Figure 3 A flow chart of a method for obtaining a first heat exchange efficiency coefficient provided by an embodiment of the present invention;

[0038] Figure 4 A flow chart of a method for obtaining a second heat exchange efficiency coefficient provided in one embodiment of the present invention;

[0039] Figure 5A schematic diagram of the structure of a vehicle exterior temperature acquisition device provided by an embodiment of the present invention;

[0040] Figure 6 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0042] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0043] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in the present invention are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant laws, regulations and standards, and corresponding operation entrances shall be provided for users to choose to authorize or refuse.

[0044] The outside temperature is one of the important parameters of a vehicle. For example, the outside temperature can be displayed on the vehicle instrument screen so that the driver can know the outside temperature in time, and can also be used for automatic adjustment of the working state of the vehicle air conditioner.

[0045] At present, the outside temperature is usually obtained through an outside temperature sensor. However, the heat reflux of the vehicle will cause the outside temperature to be affected by the heat accumulated in the front compartment of the engine, which is somewhat different from the actual outside temperature. In order to obtain the actual outside temperature, the obtained outside temperature can be corrected based on the water temperature of the radiator to obtain the target outside temperature. However, the outside temperature obtained by the above method is not accurate enough. In addition, there must be an outside temperature sensor in the above method, but the outside temperature collected by the outside temperature sensor itself cannot directly represent the actual outside temperature. The calculated outside temperature will accumulate deviations due to the memory value.

[0046] Based on the above problems, the present invention provides a method for obtaining the outside vehicle temperature. After the vehicle is awakened, when it is determined that the compressor of the vehicle is not in a working state, the target outside vehicle temperature is determined according to the exhaust pressure, exhaust temperature, intake pressure, intake temperature and initial outside vehicle temperature of the compressor; and when it is determined that the compressor of the vehicle is in a working state, the target outside vehicle temperature is determined based on the light intensity, the vehicle's interior temperature and the front windshield temperature. That is, the target outside vehicle temperature is calculated by comprehensively taking values ​​through an algorithm, which can obtain the outside vehicle temperature more accurately and the outside vehicle temperature sensor can be omitted, thereby reducing the vehicle cost.

[0047] The technical solution of the present invention is described in detail below through specific embodiments. It should be noted that the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0048] Figure 1 This is a flow chart of a method for obtaining vehicle temperature outside a vehicle provided by an embodiment of the present invention. The method for obtaining vehicle temperature outside a vehicle may be executed by software and / or hardware devices. For example, the hardware device may be a device for obtaining vehicle temperature outside a vehicle, and the device for obtaining vehicle temperature outside a vehicle may be an electronic device or a processing chip in the electronic device. Figure 1 As shown, the method of the embodiment of the present invention includes:

[0049] S101. In response to a vehicle being awakened, obtaining an initial vehicle exterior temperature of the vehicle, where the initial vehicle exterior temperature is the vehicle exterior temperature before the vehicle was last dormant.

[0050] In the embodiment of the present invention, for example, after the vehicle is awakened, the vehicle controller is awakened, and the vehicle sensors (such as the vehicle temperature sensor and the sunlight and rain sensor, etc.) start to work. The vehicle's external temperature before the vehicle last went to sleep can be read as the vehicle's initial external temperature (for example, using T 记忆1 The vehicle's outside temperature can also be initialized by collecting air temperatures such as the air outlet temperature sensor and the refrigerant temperature sensor at the vehicle's blower outlet to obtain the vehicle's initial outside temperature.

[0051] S102: Determine whether the compressor of the vehicle is in working state.

[0052] In this step, after the vehicle is awakened, there are two situations. The first situation is that the high pressure is not applied, and the compressor of the vehicle does not work, that is, the compressor is shut down; the second situation is that the high pressure is applied, and the compressor of the vehicle works, but there is a time interval between the vehicle being awakened, the high pressure being applied, and the compressor working. Therefore, it can be determined whether the compressor of the vehicle is in a working state. If the compressor of the vehicle is not in a working state, step S103 is executed; if the compressor of the vehicle is in a working state, step S104 is executed.

[0053] S103: If not, determine the target vehicle exterior temperature according to the exhaust pressure, exhaust temperature, intake pressure, intake temperature and initial vehicle exterior temperature of the compressor.

[0054] In this step, if it is determined that the compressor of the vehicle is not in working state, the exhaust pressure of the compressor can be collected by the compressor exhaust temperature pressure sensor (for example, P dis ) and exhaust temperature (for example, T dis The compressor suction pressure is collected by the compressor suction temperature and pressure sensor (for example, P suct Indicated by) and suction temperature (for example, T suct (represented by), so that the target outside temperature can be determined according to the exhaust pressure, exhaust temperature, suction pressure, suction temperature of the compressor and the initial outside temperature. Exemplarily, the target outside temperature can be determined according to the first difference between the exhaust temperature and the suction temperature, the second difference between the exhaust pressure and the suction pressure and the initial outside temperature. For how to determine the target outside temperature according to the exhaust pressure, exhaust temperature, suction pressure, suction temperature and initial outside temperature of the compressor, please refer to the subsequent embodiments, which will not be repeated here.

[0055] S104: If yes, determine the target vehicle exterior temperature based on the light intensity, the vehicle interior temperature and the front windshield temperature.

[0056] In this step, when it is determined that the compressor of the vehicle is in working state, the refrigerant system corresponding to step S103 can no longer correctly reflect the change of the external ambient temperature of the vehicle. At this time, the target external temperature can be determined based on the information collected by the sunlight and rain sensor and the in-car temperature sensor. Among them, the light intensity and the front windshield temperature can be collected by the sunlight and rain sensor, and the in-car temperature can be collected by the in-car temperature sensor. Thus, the target external temperature can be determined according to the light intensity, the in-car temperature of the vehicle and the front windshield temperature. Exemplarily, the total heat transfer power of the front windshield can be determined based on the equivalent heat transfer model of the front windshield, and then the target external temperature can be determined based on the total heat transfer power, the solar thermal radiation coefficient power, the in-car temperature heat transfer power and the front windshield temperature. For how to determine the target external temperature according to the light intensity, the in-car temperature of the vehicle and the front windshield temperature, please refer to the subsequent embodiments, which will not be repeated here.

[0057] It should be noted that the embodiment of the present invention does not limit the order in which steps S103 and S104 are executed.

[0058] The method for obtaining the outside temperature of the vehicle provided in the embodiment of the present invention obtains the initial outside temperature of the vehicle in response to the vehicle being awakened, where the initial outside temperature is the outside temperature of the vehicle before the vehicle last went into sleep mode; determines whether the compressor of the vehicle is in working state, and if not, determines the target outside temperature according to the exhaust pressure, exhaust temperature, intake pressure, intake temperature and initial outside temperature of the compressor; if so, determines the target outside temperature based on the light intensity, the inside temperature of the vehicle and the temperature of the front windshield. In the embodiment of the present invention, the relevant information for determining the target outside temperature is fully considered, and the target outside temperature is calculated by comprehensively taking values ​​of the relevant information, so that the outside temperature can be obtained more accurately, and the outside temperature sensor can be omitted, thereby reducing the cost of the vehicle.

[0059] Figure 2 FIG. 1 is a flow chart of a method for obtaining the vehicle's outside temperature provided by another embodiment of the present invention. Based on the above embodiment, the embodiment of the present invention further describes the method for obtaining the vehicle's outside temperature. Figure 2 As shown, the method of the embodiment of the present invention may include:

[0060] S201. In response to a vehicle being awakened, obtaining an initial vehicle exterior temperature of the vehicle, where the initial vehicle exterior temperature is the vehicle exterior temperature before the vehicle was last dormant.

[0061] The detailed description of this step can be found in Figure 1 The relevant description of S101 in the illustrated embodiment will not be repeated here.

[0062] S202: Determine whether the compressor of the vehicle is in working state.

[0063] The detailed description of this step can be found in Figure 1 In the related description of S102 in the illustrated embodiment, if it is determined that the compressor of the vehicle is not in working state, steps S203 to S206 are executed; if it is determined that the compressor of the vehicle is in working state, steps S207 to S213 are executed.

[0064] In the embodiment of the present invention, Figure 1 The step S103 may further include the following four steps S203 to S206:

[0065] S203: If the first difference between the exhaust temperature and the intake temperature is less than or equal to the first temperature difference threshold, and the second difference between the exhaust pressure and the intake pressure is greater than the pressure difference threshold, determine the target vehicle exterior temperature as the average value of the exhaust temperature and the intake temperature.

[0066] Exemplarily, the first temperature difference threshold is, for example, 0.2°C, and the pressure difference threshold is, for example, 0.2 bar. A first difference between the exhaust temperature and the intake temperature can be obtained, and the first difference can be understood as the absolute value of the temperature difference between the exhaust temperature and the intake temperature. A second difference between the exhaust pressure and the intake pressure can be obtained, and the second difference can be understood as the absolute value of the pressure difference between the exhaust pressure and the intake pressure. If the first difference between the exhaust temperature and the intake temperature is less than or equal to 0.2°C, and the second difference between the exhaust pressure and the intake pressure is greater than 0.2 bar, the target vehicle outside temperature can be determined as the average value of the exhaust temperature and the intake temperature, and the target vehicle outside temperature is represented by T1, for example.

[0067] S204. If the first difference is greater than the first temperature difference threshold, and the second difference is less than or equal to the pressure difference threshold, the target vehicle exterior temperature is determined to be the target saturation temperature, and the target saturation temperature is obtained by querying the refrigerant physical property parameter table according to the exhaust pressure.

[0068] For example, the target saturation temperature corresponding to the exhaust pressure can be obtained by querying a pre-stored refrigerant physical parameter table according to the exhaust pressure (for example, using T sat In this step, after obtaining the first difference between the exhaust temperature and the intake temperature and the second difference between the exhaust pressure and the intake pressure, if the first difference is greater than 0.2°C and the second difference is less than or equal to 0.2 bar, it can be determined that the target vehicle exterior temperature is the target saturation temperature, and the target vehicle exterior temperature is, for example, represented by T2.

[0069] S205: If the first difference is greater than the first temperature difference threshold, and the second difference is greater than the pressure difference threshold, determine that the target vehicle exterior temperature is the initial vehicle exterior temperature.

[0070] For example, if the first difference is greater than 0.2° C. and the second difference is greater than 0.2 bar, it means that the conditions of both steps S203 and S204 are not met, and the target outside temperature can be determined to be the initial outside temperature, which is represented by T3, for example.

[0071] S206: If the first difference is less than or equal to the first temperature difference threshold, and the second difference is less than or equal to the pressure difference threshold, determine the target vehicle exterior temperature as the minimum value among the average value, the target saturation temperature, and the initial vehicle exterior temperature.

[0072] Exemplarily, if the first difference is less than or equal to 0.2°C and the second difference is less than or equal to 0.2 bar, it means that the conditions of both steps S203 and S204 are met, and the target outdoor temperature can be determined as the minimum value of the average value, the target saturation temperature and the initial outdoor temperature in the above embodiment, that is, the target outdoor temperature is determined to be the minimum value of T1, T2 and T3.

[0073] In the embodiment of the present invention, Figure 1 The step S104 may further include the following seven steps S207 to S213:

[0074] S207: Determine whether a third difference between the vehicle interior temperature and the front windshield temperature is less than or equal to a second temperature difference threshold, and whether a duration of the third difference is greater than a duration threshold.

[0075] For example, the second temperature difference threshold is 0.2°C, and the duration threshold is 1 minute. The light intensity (e.g., h solar ) and the windshield temperature (for example, T windshield The temperature inside the car is collected by the in-car temperature sensor (for example, T cabin ). It can be determined, based on the collected vehicle interior temperature and front windshield temperature, whether a third difference between the vehicle interior temperature and the front windshield temperature is less than or equal to 0.2° C., and whether a duration of the third difference is greater than 1 minute.

[0076] If the third difference between the temperature inside the vehicle and the temperature of the front windshield is less than or equal to the second temperature difference threshold, and the duration of the third difference is greater than the duration threshold, execute step S208; if the third difference between the temperature inside the vehicle and the temperature of the front windshield is greater than the second temperature difference threshold, or the duration of the third difference is less than or equal to the duration threshold, execute steps S209 to S213.

[0077] S208: Determine the target vehicle exterior temperature as the minimum value among the average value, the target saturation temperature, the initial vehicle exterior temperature, and the front windshield temperature.

[0078] Exemplarily, when it is determined that the third difference between the interior temperature and the windshield temperature is less than or equal to the second temperature difference threshold, and the duration of the third difference is greater than the duration threshold, the average value, target saturation temperature, initial exterior temperature and windshield temperature at this time can be compared, so that the target exterior temperature can be determined as the minimum value among the average value, target saturation temperature, initial exterior temperature and windshield temperature.

[0079] S209: Obtain the temperature change rate of the front windshield temperature.

[0080] Exemplarily, the temperature change rate of the front windshield temperature may be obtained by collecting the temperature of the front windshield, and the temperature change rate may be represented by dT / dt, for example.

[0081] S210: Determine the total heat transfer power of the windshield based on the equivalent heat transfer model and the temperature change rate of the windshield.

[0082] For example, the equivalent heat transfer model of the windshield is: dT / dt=Ptotal / cp*mass, where dT / dt represents the temperature change rate and is a known variable; Ptotal represents the total heat transfer power of the windshield; cp represents the specific heat capacity of the windshield, mass represents the mass of the windshield, and cp*mass can be confirmed as a constant according to different vehicle models. Therefore, the total heat transfer power P of the windshield can be determined by the equivalent heat transfer model of the windshield. 总 , that is, Ptotal = dT / dt*cp*mass.

[0083] S211. Determine the solar heat radiation coefficient power based on the light intensity and the glass area of ​​the front windshield.

[0084] For example, the solar radiation coefficient power is expressed as P solar If P solar =h solar *A*α, where h solar represents the light intensity, which is a known variable that can be measured by the sunlight and rain sensor; A represents the area of ​​the front windshield, and α represents the absorption coefficient of the front windshield. According to the front windshield used in different models, it can be confirmed that A and α are constants, so P can be determined. solar , P solar is a known variable.

[0085] S212: Determine the in-vehicle temperature heat exchange power based on the in-vehicle temperature, the front windshield temperature and the first heat exchange efficiency coefficient.

[0086] For example, the heat exchange power of the vehicle interior temperature is expressed as P cabin If P cabin =(T cabin -T windshield )*ф1, where T cabin represents the in-car temperature, which is a known variable collected by the in-car temperature sensor; T windshield represents the front windshield temperature, which is a known variable collected by the sunlight and rain sensor; ф1 represents the first heat transfer efficiency coefficient, which can be confirmed by three-dimensional simulation or equivalent calculation formula and is a fixed calibration value. For how to obtain the first heat transfer efficiency coefficient, please refer to the subsequent embodiments, which will not be repeated here.

[0087] It should be noted that the embodiment of the present invention does not limit the order in which steps S210, S211 and S212 are executed.

[0088] S213: Determine a target vehicle exterior temperature based on the total heat transfer power, the solar heat radiation coefficient power, the vehicle interior temperature heat transfer power, the front windshield temperature, and the second heat transfer efficiency coefficient.

[0089] In this step, after determining the total heat exchange power, solar thermal radiation coefficient power and interior temperature heat exchange power, the target outside temperature can be determined based on the total heat exchange power, solar thermal radiation coefficient power, interior temperature heat exchange power, front windshield temperature and the second heat exchange efficiency coefficient.

[0090] Further, optionally, determining the target vehicle exterior temperature based on the total heat transfer power, the solar heat radiation coefficient power, the vehicle interior temperature heat transfer power, the front windshield temperature and the second heat transfer efficiency coefficient may include: determining the target vehicle exterior temperature according to the following formula:

[0091]

[0092] Among them, T ambient Indicates the target vehicle exterior temperature; P 总 Represents the total heat transfer power; P solar Indicates solar thermal radiation coefficient power; P cabin Indicates the heat transfer power of the vehicle interior temperature; T windshield Indicates the front windshield temperature; ф2 indicates the second heat exchange efficiency coefficient.

[0093] For example, assuming that the ambient temperature heat exchange power is P ambient If P ambient =(T ambient -T windshield )*ф2, where T ambient represents the target outside temperature to be determined; T windshield represents the front windshield temperature, which is a known variable collected by the sunlight and rain sensor; ф2 represents the second heat transfer efficiency coefficient, which is a one-dimensional table of vehicle speed and heat transfer efficiency coefficient, and is used as a calibration quantity. For the specific method of obtaining the second heat transfer efficiency coefficient, please refer to the subsequent embodiments, which will not be repeated here. 总 =P solar +P cabin +P ambient , therefore, P ambient =P 总 -P solar -P cabin , so T can be determined according to the above formula ambient .

[0094] The vehicle outside temperature acquisition method provided by the embodiment of the present invention acquires the initial vehicle outside temperature of the vehicle in response to the vehicle being awakened, where the initial vehicle outside temperature is the vehicle outside temperature before the vehicle was last dormant; determines whether the compressor of the vehicle is in a working state, and if it is determined that the compressor of the vehicle is not in a working state, determines the target vehicle outside temperature based on the initial vehicle outside temperature, a first difference between the exhaust temperature and the intake temperature, and a second difference between the exhaust pressure and the intake pressure; if it is determined that the compressor of the vehicle is in a working state, determines whether the third difference between the vehicle inside temperature and the front windshield temperature is less than or equal to The second temperature difference threshold, and whether the duration of the third difference is greater than the duration threshold, if the third difference is less than or equal to the second temperature difference threshold, and the duration of the third difference is greater than the duration threshold, then the target vehicle outside temperature is determined to be the minimum value among the average value, the target saturation temperature, the initial vehicle outside temperature and the front windshield temperature; if the third difference is greater than the second temperature difference threshold, or the duration of the third difference is less than or equal to the duration threshold, then based on the total heat exchange power, the solar thermal radiation coefficient power, the vehicle interior temperature heat exchange power, the front windshield temperature and the second heat exchange efficiency coefficient, the target vehicle outside temperature is determined. In the embodiment of the present invention, the relevant information used to determine the target vehicle outside temperature is fully considered, and based on whether the compressor is in working state, the corresponding algorithm is used to comprehensively obtain the relevant information to infer the target vehicle outside temperature, so that the vehicle outside temperature can be obtained more accurately, and the vehicle outside temperature sensor can be omitted, thereby reducing the vehicle cost.

[0095] Based on the above embodiment, optionally, the outside temperature can be obtained at preset time intervals, and the outside temperature can be preprocessed to obtain a target outside temperature, wherein the preprocessing includes filtering and / or limiting the rate of change of the outside temperature when the vehicle speed is less than a speed threshold; and the target outside temperature is output.

[0096] Exemplarily, the preset time interval is, for example, 0.01 seconds. The outside temperature can be obtained every 0.01 seconds, and the outside temperature can be filtered. For example, a peak removal sliding filter algorithm can be used to filter the target outside temperature to avoid disturbances. The rate of change of the inferred outside temperature can also be limited. When the vehicle speed is less than 10 kilometers per hour (kph), the outside temperature is not allowed to rise, and the outside temperature at this time is memorized as the target outside temperature, thereby limiting the rate of change of the outside temperature. After obtaining the target outside temperature, the target outside temperature can be output. For example, the target outside temperature can be output to the display end of the vehicle for display, or the target outside temperature can be output to other software in the vehicle for use as a calculated value or precondition for other software.

[0097] Based on the above embodiments, Figure 3 This is a flow chart of a method for obtaining a first heat exchange efficiency coefficient provided by an embodiment of the present invention. Figure 3 As shown, the method of the embodiment of the present invention may include:

[0098] S301. Obtain an average wind speed on the inner surface of the front windshield according to a gear signal and an air outlet pattern of a blower of the vehicle.

[0099] Exemplarily, the gear signal of the blower is represented by B, the air outlet mode is represented by M, and the blowing mode may include blowing on the face, blowing on the window, blowing on the foot, blowing on the face and blowing on the foot, etc. A two-dimensional mapping table (represented by Table A, for example) can be established in advance by measuring the average wind speed of the inner surface of the front windshield under different blower gears and air outlet modes; or a mapping table of the average wind speed of the inner surface of the front windshield corresponding to the blower gear and air outlet mode can be established through three-dimensional flow field simulation. After collecting the current gear signal and current air outlet mode of the vehicle's blower, you can query Table A, for example, to obtain the average wind speed of the inner surface of the front windshield (represented by V1, for example).

[0100] S302: Determine a first basic parameter of the air inside the vehicle according to the temperature inside the vehicle and the speed of the vehicle.

[0101] Exemplarily, the basic parameters of air can also be understood as basic physical parameters of air, such as temperature, thermal conductivity, viscosity, density, and specific heat capacity of air. The first basic parameter of the air in the vehicle can be determined according to the temperature in the vehicle and the speed of the vehicle. The speed of the vehicle can be obtained by a speed sensor.

[0102] It should be noted that the embodiment of the present invention does not limit the order in which steps S301 and S302 are executed.

[0103] S303: Determine a first Reynolds number and a first Prandtl number of heat exchange convection between the air in the vehicle and the front windshield according to the average wind speed, the structural dimensions of the front windshield and the first basic parameter.

[0104] Exemplarily, the structural dimensions of the front windshield may include, for example, the area, length, and width of the front windshield. After obtaining the average wind speed and the first basic parameter of the inner surface of the front windshield, the first Reynolds number (for example, represented by Re1) and the first Prandtl number (for example, represented by Pr1) of the heat exchange convection between the air in the vehicle and the front windshield may be determined according to the average wind speed, the structural dimensions of the front windshield, and the first basic parameter. Wherein, Re1=V1*glass width of the front windshield*density of the air in the vehicle / viscosity of the air in the vehicle; Pr1=viscosity of the air in the vehicle*specific heat capacity of the air in the vehicle / thermal conductivity of the air in the vehicle.

[0105] S304 . Obtain a first Nusselt number according to the first Reynolds number and the first Prandtl number.

[0106] In this step, after the first Reynolds number and the first Prandtl number are obtained, the first Nusselt number (for example, Nu force1 express).

[0107] S305 . Obtain the heat transfer coefficient of the inner temperature of the front windshield according to the first Nusselt number and the first free heat transfer coefficient calibration value.

[0108] Exemplarily, a first free heat transfer coefficient calibration value may be set, so that the windshield inner temperature heat transfer coefficient (for example, represented by Nu1) may be obtained according to the first Nusselt number and the first free heat transfer coefficient calibration value.

[0109] S306 , obtaining a first heat exchange efficiency coefficient according to the heat exchange coefficient of the inner temperature of the front windshield, the calibration amount of the first heat exchange efficiency adjustment coefficient, and the glass width of the front windshield.

[0110] Exemplarily, a first heat transfer efficiency adjustment coefficient calibration value (for example, represented by K1) can be set, and the first heat transfer efficiency coefficient can be obtained based on the windshield internal temperature heat transfer coefficient, the first heat transfer efficiency adjustment coefficient calibration value and the glass width of the windshield, that is, the first heat transfer efficiency coefficient ф1 = K1*Nu1*the glass width of the windshield.

[0111] The first heat transfer efficiency coefficient acquisition method provided in an embodiment of the present invention obtains the average wind speed of the inner surface of the front windshield according to the gear signal and air outlet mode of the vehicle's blower; determines the first basic parameter of the air inside the vehicle according to the temperature inside the vehicle and the speed of the vehicle; determines the first Reynolds number and the first Prandtl number of the heat exchange convection between the air inside the vehicle and the front windshield according to the average wind speed, the structural dimensions of the front windshield and the first basic parameter; obtains the first Nusselt number according to the first Reynolds number and the first Prandtl number; obtains the windshield internal temperature heat transfer coefficient according to the first Nusselt number and the first free heat transfer coefficient calibration value; obtains the first heat transfer efficiency coefficient according to the windshield internal temperature heat transfer coefficient, the first heat transfer efficiency adjustment coefficient calibration value and the glass width of the windshield, so that the first heat transfer efficiency coefficient can be accurately obtained, so that when the first heat transfer efficiency coefficient is used to determine the target vehicle external temperature, it helps to more accurately determine the target vehicle external temperature.

[0112] Based on the above embodiments, Figure 4 This is a flow chart of a method for obtaining a second heat exchange efficiency coefficient provided by an embodiment of the present invention. Figure 4 As shown, the method of the embodiment of the present invention may include:

[0113] S401. Determine a second basic parameter of the air outside the vehicle according to the current temperature outside the vehicle and the speed of the vehicle, wherein the current temperature outside the vehicle is the target temperature outside the vehicle obtained last time.

[0114] It can be understood that the target outside temperature is obtained at a preset time interval (such as 0.01 seconds), so the current outside temperature is the target outside temperature obtained last time. The vehicle speed (such as Vel) can be obtained by a vehicle speed sensor, so that the second basic parameter of the outside air can be determined according to the current outside temperature and the vehicle speed.

[0115] S402: Determine a second Reynolds number and a second Prandtl number for heat exchange convection between the outside air and the front windshield according to the vehicle speed, the structural dimensions of the front windshield, and the second basic parameter.

[0116] For example, after determining the second basic parameter of the air outside the vehicle, the second Reynolds number (for example, represented by Re2) and the second Prandtl number (for example, represented by Pr2) of the heat exchange convection between the air outside the vehicle and the front windshield can be determined according to the vehicle speed, the structural size of the front windshield and the second basic parameter. Wherein, Re2 = Vel * glass width of the front windshield * density of the air outside the vehicle / viscosity of the air outside the vehicle; Pr2 = viscosity of the air * specific heat capacity of the air outside the vehicle / thermal conductivity of the air outside the vehicle.

[0117] S403, obtaining a second Nusselt number according to the second Reynolds number and the second Prandtl number.

[0118] In this step, after the second Reynolds number and the second Prandtl number are obtained, the second Nusselt number (for example, Nu force2 express).

[0119] S404: Obtain the windshield external temperature heat transfer coefficient according to the second Nusselt number and the second free heat transfer coefficient calibration value.

[0120] Exemplarily, a second free heat transfer coefficient calibration value may be set, so that the windshield external temperature heat transfer coefficient (for example, represented by Nu2) may be obtained according to the second Nusselt number and the second free heat transfer coefficient calibration value.

[0121] S405: Obtain a second heat exchange efficiency coefficient according to the heat exchange coefficient of the windshield external temperature, the calibration amount of the second heat exchange efficiency adjustment coefficient, and the glass width of the windshield.

[0122] Exemplarily, a second heat transfer efficiency adjustment coefficient calibration value (for example, represented by K2) can be set, and the second heat transfer efficiency coefficient can be obtained based on the windshield external temperature heat transfer coefficient, the second heat transfer efficiency adjustment coefficient calibration value and the glass width of the windshield, that is, the second heat transfer efficiency coefficient ф2 = K2*Nu2*the glass width of the windshield.

[0123] The second heat transfer efficiency coefficient acquisition method provided in an embodiment of the present invention determines the second basic parameter of the air outside the vehicle according to the current outside temperature and the vehicle speed, wherein the current outside temperature is the target outside temperature obtained last time; determines the second Reynolds number and the second Prandtl number of the heat exchange convection between the outside air and the windshield according to the vehicle speed, the structural dimensions of the windshield and the second basic parameter; acquires the second Nusselt number according to the second Reynolds number and the second Prandtl number; acquires the windshield outside temperature heat transfer coefficient according to the second Nusselt number and the second free heat transfer coefficient calibration value; acquires the second heat transfer efficiency coefficient according to the windshield outside temperature heat transfer coefficient, the second heat transfer efficiency adjustment coefficient calibration value and the glass width of the windshield, so as to accurately acquire the second heat transfer efficiency coefficient, thereby helping to more accurately determine the target outside temperature when the second heat transfer efficiency coefficient is used to determine the target outside temperature.

[0124] The following are embodiments of the apparatus of the present invention, which can be used to implement the embodiments of the method of the present invention. For details not disclosed in the embodiments of the apparatus of the present invention, please refer to the embodiments of the method of the present invention.

[0125] Figure 5 This is a schematic diagram of the structure of a vehicle outside temperature acquisition device provided by an embodiment of the present invention. Figure 5 As shown, the vehicle outside temperature acquisition device 500 of the embodiment of the present invention includes: an acquisition module 501, a first determination module 502, a second determination module 503 and a third determination module 504. Among them:

[0126] The acquisition module 501 is used to acquire the initial vehicle exterior temperature of the vehicle in response to the vehicle being awakened, where the initial vehicle exterior temperature is the vehicle exterior temperature before the vehicle was last dormant.

[0127] The first determination module 502 is configured to determine whether the compressor of the vehicle is in a working state.

[0128] The second determination module 503 is used to determine the target vehicle exterior temperature according to the exhaust pressure, exhaust temperature, intake pressure, intake temperature and initial vehicle exterior temperature of the compressor if no.

[0129] The third determination module 504 is configured to determine a target vehicle exterior temperature based on the light intensity, the vehicle interior temperature, and the front windshield temperature.

[0130] Further, the third determination module 504 can be specifically used to: obtain the temperature change rate of the windshield temperature; determine the total heat exchange power of the windshield based on the equivalent heat exchange model and temperature change rate of the windshield; determine the solar thermal radiation coefficient power based on the light intensity and the glass area of ​​the windshield; determine the in-vehicle temperature heat exchange power based on the in-vehicle temperature, the windshield temperature and the first heat exchange efficiency coefficient; determine the target outside vehicle temperature based on the total heat exchange power, the solar thermal radiation coefficient power, the in-vehicle temperature heat exchange power, the windshield temperature and the second heat exchange efficiency coefficient.

[0131] Further, when the third determination module 504 is used to determine the target vehicle exterior temperature based on the total heat exchange power, the solar heat radiation coefficient power, the vehicle interior temperature heat exchange power, the front windshield temperature and the second heat exchange efficiency coefficient, it can be specifically used to determine the target vehicle exterior temperature according to the following formula:

[0132]

[0133] Among them, T ambient Indicates the target vehicle exterior temperature; P 总 Represents the total heat transfer power; P solar Indicates the solar thermal radiation coefficient power; P cabin Indicates the heat transfer power of the vehicle interior temperature; T windshield Indicates the front windshield temperature; ф2 indicates the second heat exchange efficiency coefficient.

[0134] Furthermore, the third determination module 504 can also be used to obtain the first heat exchange efficiency coefficient in the following manner: according to the gear signal and the air outlet pattern of the vehicle's blower, the average wind speed of the inner surface of the front windshield is obtained; according to the temperature inside the vehicle and the speed of the vehicle, the first basic parameter of the air inside the vehicle is determined; according to the average wind speed, the structural dimensions of the front windshield and the first basic parameter, the first Reynolds number and the first Prandtl number of the heat exchange convection between the air inside the vehicle and the front windshield are determined; according to the first Reynolds number and the first Prandtl number, the first Nusselt number is obtained; according to the first Nusselt number and the first free heat transfer coefficient calibration value, the heat transfer coefficient of the internal temperature of the windshield is obtained; according to the heat transfer coefficient of the internal temperature of the windshield, the calibration value of the first heat transfer efficiency adjustment coefficient and the glass width of the windshield, the first heat transfer efficiency coefficient is obtained.

[0135] Furthermore, the third determination module 504 can also be used to obtain the second heat transfer efficiency coefficient in the following manner: determine the second basic parameter of the outside air according to the current outside temperature and the vehicle speed, the current outside temperature being the target outside temperature obtained last time; determine the second Reynolds number and the second Prandtl number of the heat exchange convection between the outside air and the windshield according to the vehicle speed, the structural dimensions of the windshield and the second basic parameter; obtain the second Nusselt number according to the second Reynolds number and the second Prandtl number; obtain the outside temperature heat transfer coefficient of the windshield according to the second Nusselt number and the second free heat transfer coefficient calibration value; obtain the second heat transfer efficiency coefficient according to the outside temperature heat transfer coefficient of the windshield, the second heat transfer efficiency adjustment coefficient calibration value and the glass width of the windshield.

[0136] Further, the second determination module 503 can be specifically used for: if the first difference between the exhaust temperature and the intake temperature is less than or equal to the first temperature difference threshold, and the second difference between the exhaust pressure and the intake pressure is greater than the pressure difference threshold, then the target outside temperature is determined to be the average of the exhaust temperature and the intake temperature; if the first difference is greater than the first temperature difference threshold, and the second difference is less than or equal to the pressure difference threshold, then the target outside temperature is determined to be the target saturation temperature, and the target saturation temperature is obtained by querying the refrigerant physical property parameter table based on the exhaust pressure; if the first difference is greater than the first temperature difference threshold, and the second difference is greater than the pressure difference threshold, then the target outside temperature is determined to be the initial outside temperature.

[0137] Further, the second determination module 503 can also be used to: if the first difference is less than or equal to the first temperature difference threshold, and the second difference is less than or equal to the pressure difference threshold, determine the target outside temperature as the minimum value among the average value, the target saturation temperature and the initial outside temperature.

[0138] Furthermore, the third determination module 504 can also be used for: when the compressor is in working state, if the third difference between the temperature inside the vehicle and the temperature of the front windshield is less than or equal to the second temperature difference threshold, and the duration of the third difference is greater than the duration threshold, then the target outside temperature is determined to be the minimum value among the average value, the target saturation temperature, the initial outside temperature and the windshield temperature.

[0139] Furthermore, the vehicle exterior temperature acquisition device 500 may further include a processing module ( Figure 5 ), used for: obtaining the outside temperature at preset time intervals, preprocessing the outside temperature to obtain a target outside temperature, the preprocessing including filtering and / or limiting the rate of change of the outside temperature when the vehicle speed is less than a speed threshold; and outputting the target outside temperature.

[0140] The device of the embodiment of the present invention can be used to execute the technical solution of any of the above-mentioned method embodiments. Its implementation principle and technical effects are similar and will not be repeated here.

[0141] The present invention also provides a vehicle, comprising a vehicle body, front wheels and rear wheels, wherein the vehicle body is arranged between the front wheels and the rear wheels; the vehicle also includes an outside temperature acquisition device as described above in the embodiment of the present invention, which is arranged on the vehicle body.

[0142] Figure 6 This is a schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. Figure 6 As shown, the electronic device 600 may include: at least one processor 601 and a memory 602 .

[0143] The memory 602 is used to store programs. Specifically, the programs may include program codes, and the program codes include computer-executable instructions.

[0144] The memory 602 may include a high-speed random access memory (RAM), and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0145] The processor 601 is used to execute the computer-executable instructions stored in the memory 602 to implement the vehicle outside temperature acquisition method described in the aforementioned method embodiment. The processor 601 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiment of the present invention. Specifically, when implementing the vehicle outside temperature acquisition method described in the aforementioned method embodiment, the electronic device may be, for example, a vehicle controller.

[0146] Optionally, the electronic device 600 may further include a communication interface 603. In a specific implementation, if the communication interface 603, the memory 602 and the processor 601 are implemented independently, the communication interface 603, the memory 602 and the processor 601 may be interconnected through a bus and communicate with each other. The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc., but it does not mean that there is only one bus or one type of bus.

[0147] Optionally, in a specific implementation, if the communication interface 603, the memory 602 and the processor 601 are integrated on a chip, the communication interface 603, the memory 602 and the processor 601 can communicate through an internal interface.

[0148] The present invention also provides a computer-readable storage medium, in which computer program instructions are stored. When a processor executes the computer program instructions, the above-mentioned method for obtaining the vehicle's outside temperature is implemented.

[0149] The present invention also provides a computer program product, including a computer program, which implements the above-mentioned method for obtaining the vehicle's external temperature when executed by a processor.

[0150] The computer-readable storage medium mentioned above can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read only memory (EEPROM), erasable programmable read only memory (EPROM), programmable read only memory (PROM), read only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk. The readable storage medium can be any available medium that can be accessed by a general or special-purpose computer.

[0151] An exemplary readable storage medium is coupled to the processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can be located in a dedicated integrated circuit. Of course, the processor and the readable storage medium can also exist as discrete components in the vehicle outside temperature acquisition device.

[0152] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0153] Finally, it should be noted that the above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or change made by a person skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. A method for obtaining the outside temperature of a vehicle, characterized in that: include: In response to the vehicle being awakened, acquiring an initial vehicle exterior temperature of the vehicle, the initial vehicle exterior temperature being the vehicle exterior temperature before the vehicle was last dormant; determining whether a compressor of the vehicle is in an operating state; If not, determining a target vehicle exterior temperature according to the exhaust pressure, exhaust temperature, suction pressure, suction temperature of the compressor and the initial vehicle exterior temperature; If so, the target vehicle exterior temperature is determined based on the light intensity, the vehicle interior temperature and the front windshield temperature.

2. The method for obtaining the vehicle outside temperature according to claim 1, characterized in that: The step of determining the target vehicle exterior temperature based on the light intensity, the vehicle interior temperature, and the front windshield temperature includes: Obtaining a temperature change rate of the front windshield temperature; Determining a total heat transfer power of the front windshield based on an equivalent heat transfer model of the front windshield and the temperature change rate; Determining solar radiation coefficient power based on the light intensity and the glass area of ​​the front windshield; Determining a heat exchange power for the interior temperature of the vehicle based on the interior temperature of the vehicle, the front windshield temperature, and a first heat exchange efficiency coefficient; The target vehicle exterior temperature is determined based on the total heat exchange power, the solar heat radiation coefficient power, the vehicle interior temperature heat exchange power, the front windshield temperature and a second heat exchange efficiency coefficient.

3. The method for obtaining the vehicle outside temperature according to claim 2, characterized in that: The determining the target vehicle exterior temperature based on the total heat exchange power, the solar heat radiation coefficient power, the vehicle interior temperature heat exchange power, the front windshield temperature and the second heat exchange efficiency coefficient includes: The target vehicle exterior temperature is determined according to the following formula: Among them, T ambient represents the target vehicle exterior temperature; Ptotal represents the total heat exchange power; P solar represents the solar thermal radiation coefficient power; P cabin represents the heat transfer power of the vehicle interior temperature; T windshield represents the front windshield temperature; ф2 represents the second heat exchange efficiency coefficient.

4. The method for obtaining the vehicle external temperature according to claim 2, characterized in that: The first heat exchange efficiency coefficient is obtained by the following method: According to the gear position signal and the air outlet mode of the blower of the vehicle, an average wind speed of the inner surface of the front windshield is obtained; Determining a first basic parameter of the air inside the vehicle according to the temperature inside the vehicle and the speed of the vehicle; Determining a first Reynolds number and a first Prandtl number for heat exchange convection between the air in the vehicle and the front windshield according to the average wind speed, the structural dimensions of the front windshield and the first basic parameter; Obtaining a first Nusselt number according to the first Reynolds number and the first Prandtl number; Obtaining a heat transfer coefficient of the inner temperature of the front windshield according to the first Nusselt number and the first free heat transfer coefficient calibration value; The first heat exchange efficiency coefficient is obtained according to the heat exchange coefficient of the inner temperature of the front windshield, the calibration amount of the first heat exchange efficiency adjustment coefficient and the glass width of the front windshield.

5. The method for obtaining the vehicle external temperature according to claim 2, characterized in that: The second heat exchange efficiency coefficient is obtained by the following method: Determining a second basic parameter of the air outside the vehicle according to a current outside temperature and a speed of the vehicle, wherein the current outside temperature is a target outside temperature obtained last time; Determining a second Reynolds number and a second Prandtl number of heat exchange convection between the outside air and the front windshield according to the vehicle speed, the structural dimensions of the front windshield and the second basic parameter; Obtaining a second Nusselt number according to the second Reynolds number and the second Prandtl number; Obtaining a heat transfer coefficient of an external temperature of a front windshield according to the second Nusselt number and the second free heat transfer coefficient calibration value; The second heat exchange efficiency coefficient is obtained according to the heat exchange coefficient of the front windshield external temperature, the calibration amount of the second heat exchange efficiency adjustment coefficient and the glass width of the front windshield.

6. The method for obtaining the vehicle outside temperature according to any one of claims 1 to 5, characterized in that: The step of determining a target vehicle exterior temperature according to the exhaust pressure, exhaust temperature, intake pressure, intake temperature and the initial vehicle exterior temperature of the compressor comprises: If a first difference between the exhaust temperature and the intake temperature is less than or equal to a first temperature difference threshold, and a second difference between the exhaust pressure and the intake pressure is greater than a pressure difference threshold, determining the target vehicle exterior temperature to be an average value of the exhaust temperature and the intake temperature; If the first difference is greater than the first temperature difference threshold, and the second difference is less than or equal to the pressure difference threshold, the target vehicle exterior temperature is determined to be a target saturation temperature, and the target saturation temperature is obtained by querying a refrigerant physical property parameter table according to the exhaust pressure; If the first difference is greater than the first temperature difference threshold, and the second difference is greater than the pressure difference threshold, the target vehicle exterior temperature is determined to be the initial vehicle exterior temperature.

7. The method for obtaining the vehicle external temperature according to claim 6, characterized in that: Also includes: If the first difference is less than or equal to the first temperature difference threshold, and the second difference is less than or equal to the pressure difference threshold, the target outside temperature is determined to be the minimum value among the average value, the target saturation temperature and the initial outside temperature.

8. The method for obtaining the vehicle external temperature according to claim 7, characterized in that: Also includes: When the compressor is in working state, if the third difference between the vehicle interior temperature and the windshield temperature is less than or equal to the second temperature difference threshold, and the duration of the third difference is greater than the duration threshold, the target vehicle exterior temperature is determined to be the minimum value among the average value, the target saturation temperature, the initial vehicle exterior temperature and the windshield temperature.

9. The method for obtaining the vehicle outside temperature according to any one of claims 1 to 5, characterized in that: Also includes: Acquiring the vehicle outside temperature at a preset time interval, preprocessing the vehicle outside temperature to obtain the target vehicle outside temperature, wherein the preprocessing includes filtering and / or limiting the rate of change of the vehicle outside temperature when the vehicle speed is less than a vehicle speed threshold; The target vehicle exterior temperature is output.

10. A vehicle outside temperature acquisition device, characterized in that: include: An acquisition module, configured to acquire an initial vehicle exterior temperature of the vehicle in response to the vehicle being awakened, wherein the initial vehicle exterior temperature is the vehicle exterior temperature before the vehicle was last dormant; A first determination module, configured to determine whether a compressor of the vehicle is in a working state; A second determination module is used to determine the target vehicle outside temperature according to the exhaust pressure, exhaust temperature, intake pressure, intake temperature of the compressor and the initial vehicle outside temperature if no; The third determination module is used to determine the target vehicle exterior temperature based on the light intensity, the vehicle interior temperature and the front windshield temperature.

11. A vehicle, characterized in that: The vehicle comprises a vehicle body, front wheels and rear wheels, wherein the vehicle body is arranged between the front wheels and the rear wheels; the vehicle further comprises an outside temperature acquisition device as claimed in claim 10 arranged on the vehicle body.

12. An electronic device, characterized in that: include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the vehicle exterior temperature acquisition method according to any one of claims 1 to 9.

13. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer program instructions, and when the computer program instructions are executed, the vehicle outside temperature acquisition method according to any one of claims 1 to 9 is implemented.

14. A computer program product comprising a computer program, characterized in that When the computer program is executed, the vehicle outside temperature acquisition method according to any one of claims 1 to 9 is implemented.

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