CN120621290B - Defogging method, device and equipment for automobile windshield glass - Google Patents
Defogging method, device and equipment for automobile windshield glassInfo
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- CN120621290B CN120621290B CN202511124204.0A CN202511124204A CN120621290B CN 120621290 B CN120621290 B CN 120621290B CN 202511124204 A CN202511124204 A CN 202511124204A CN 120621290 B CN120621290 B CN 120621290B
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Abstract
The invention provides a defogging method, device and equipment for automobile windshield glass, which comprise the steps of acquiring dew point temperature according to real-time temperature and humidity data acquired by a temperature and humidity sensor, carrying out partition temperature measurement on a target space by means of a thermopile array sensor to obtain the regional temperature of each pixel region in the target space, calculating critical temperature according to the dew point temperature and a preset temperature difference threshold value, predicting a dew region according to the regional temperature of each pixel region by combining the critical temperature, and controlling defogging equipment to defog the dew region. According to the embodiment of the invention, the thermopile array sensor is used for carrying out partition temperature measurement on the target space, so that the area temperature of each pixel area in the target space is obtained, the whole coverage of the target area is realized, the response precision is improved, the occurrence position of the fogging phenomenon is accurately judged, and the directional response is realized.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a method, a device and equipment for defogging automobile windshield glass.
Background
Defogging/antifogging of automobiles is important for ensuring driving safety. When the windshield is fogged, the vision of a driver can be seriously hindered, so that the driver cannot clearly observe the conditions of a road, traffic signals, pedestrians and other vehicles in front of the vehicle, traffic accidents such as rear-end collision and the like are extremely easy to occur, the side window is fogged, the driver can be disturbed in observing the rearview mirror, the rearview mirror is used as an important tool for the driver to grasp the condition behind the vehicle, once the side window is fogged, the driver can hardly accurately judge the distance and the speed of the vehicle behind, and the lane change collision risk is remarkably increased. In addition, when the glass is fogged, a driver needs to frequently operate the defogging device and even wipe the glass manually, and the process can scatter driving attention, exacerbate driving fatigue and further improve accident rate.
The existing demisting/anti-fog method mainly adopts two control modes:
1. The main problems of the method are that in order to avoid shielding the vision of a driver, the sensor can only be arranged at the edge of the glass, the glass temperature of the main vision area of the driver can not be monitored in real time, and the response is influenced by the heat transfer speed of the windshield and the side window glass, so that certain hysteresis exists;
2. The method is mainly characterized in that only the fog forming condition of a single point or a small area covered by the optical path of the detection device can be judged, all visual field areas can not be covered, and the principle is that the judgment is realized by detecting the reflectivity reduction caused by diffuse reflection of fog drops, and the detection accuracy is easily influenced by dust and other factors.
Therefore, the existing defogging/antifogging method has the problems of insufficient coverage range and limited response accuracy.
Disclosure of Invention
The embodiment of the invention provides a defogging method, device and equipment for automobile windshield glass, and aims to solve the problems of insufficient coverage and limited response accuracy of the existing defogging/antifogging method.
In a first aspect, an embodiment of the present invention provides a method for defogging an automotive windshield, the method including:
acquiring dew point temperature according to real-time temperature and humidity data acquired by a temperature and humidity sensor;
carrying out partition temperature measurement on a target space by means of a thermopile array sensor to obtain the region temperature of each pixel region in the target space;
calculating a critical temperature according to the dew point temperature and a preset temperature difference threshold;
predicting a condensation area according to the area temperature of each pixel area by combining the critical temperature;
And controlling the demisting equipment to demist the dew area.
In a second aspect, an embodiment of the present invention further provides an apparatus for defogging an automotive windshield, the apparatus comprising:
The acquisition unit is used for acquiring dew point temperature according to real-time temperature and humidity data acquired by the temperature and humidity sensor;
The temperature measuring unit is used for carrying out partition temperature measurement on the target space by means of the thermopile array sensor to obtain the area temperature of each pixel area in the target space;
The calculating unit is used for calculating the critical temperature according to the dew point temperature and a preset temperature difference threshold value;
a prediction unit, configured to predict a condensation area according to an area temperature of each pixel area in combination with the critical temperature;
and the demisting unit is used for controlling demisting equipment to demist the dew area.
In a third aspect, an embodiment of the present invention further provides an electronic device, which includes a memory and a processor, where the memory stores a computer program, and the processor implements the method described in the first aspect when executing the computer program.
In a fourth aspect, embodiments of the present invention also provide a computer readable storage medium storing a computer program comprising program instructions which, when executed by a processor, implement the method of the first aspect.
The invention provides a defogging method, device and equipment for automobile windshield glass, which comprise the steps of acquiring dew point temperature according to real-time temperature and humidity data acquired by a temperature and humidity sensor, carrying out partition temperature measurement on a target space by means of a thermopile array sensor to obtain the regional temperature of each pixel region in the target space, calculating critical temperature according to the dew point temperature and a preset temperature difference threshold value, predicting a dew region according to the regional temperature of each pixel region by combining the critical temperature, and controlling defogging equipment to defog the dew region. According to the embodiment of the invention, the thermopile array sensor is used for carrying out partition temperature measurement on the target space, so that the area temperature of each pixel area in the target space is obtained, the whole coverage of the target area is realized, the response precision is improved, the occurrence position of the fogging phenomenon is accurately judged, and the directional response is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a method for defogging an automobile windshield according to an embodiment of the present invention;
FIG. 2 is a schematic block diagram of an automotive windshield defogging device according to an embodiment of the present invention;
FIG. 3 is a schematic block diagram of an electronic device according to an embodiment of the present invention;
FIG. 4 is a schematic view of a field of view of a thermopile array sensor provided by an embodiment of the present invention;
FIG. 5 is a schematic diagram of a temperature measurement pixel of a thermopile array sensor according to an embodiment of the present invention;
fig. 6 is a schematic diagram of differential calibration of an important area and a non-important area of an automobile.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations. The embodiment of the invention provides a method, a device and equipment for defogging automobile windshield glass. Referring to fig. 1, fig. 1 is a schematic flow chart of a method for demisting an automobile windshield according to an embodiment of the invention. The method is applied to a controller of a defogging system, the defogging system further comprises a temperature and humidity sensor, a thermopile array sensor and a cabin temperature sensor, and the temperature and humidity sensor, the thermopile array sensor and the cabin temperature sensor are all in communication connection with the controller through a data interaction interface to realize data transmission.
Fig. 1 is a schematic flow chart of a demisting method for automobile windshield glass according to an embodiment of the invention. As shown in fig. 1, the method includes the following steps S110 to S150.
S110, acquiring dew point temperature according to real-time temperature and humidity data acquired by a temperature and humidity sensor.
In this embodiment, the temperature and humidity sensor is used to measure the relative humidity (moisture content) and the real-time environmental temperature in the automobile cabin, and the dew point temperature is calculated according to the relative humidity and the real-time environmental temperature, where the temperature and humidity sensor is a hygrothermograph or NDIR moisture sensor module.
In an embodiment, step S110 includes acquiring real-time temperature and humidity data acquired by the temperature and humidity sensor, where the real-time temperature and humidity data includes real-time ambient temperature and relative humidity, and calculating the real-time ambient temperature and the relative humidity according to a humidity related calculation formula to obtain a corresponding dew point temperature.
In this embodiment, real-time temperature and humidity data acquired by the temperature and humidity sensor are acquired, wherein the real-time temperature and humidity data include real-time ambient temperature and relative humidity, the real-time ambient temperature and the relative humidity are calculated according to a humidity related calculation formula to obtain a corresponding dew point temperature, and the humidity related calculation formula specifically includes a Magnus formula, a Goff-Gratch formula, a Rayleigh formula, a Hyland-Wexler formula and the like, and in addition, query calculation can be performed according to a WMO standard saturated water vapor pressure meter.
Here, taking the Magnus formula as an example, the Magnus formula is expressed as:;
Wherein, gamma is an intermediate variable, a and b are constants, T is a real-time ambient temperature, RH is relative humidity, T d is a dew point temperature, and preferably, when the ambient temperature outside the automobile cabin is below 0 ℃, frosting phenomenon can occur on the inner wall of the glass, so that low-temperature correction is required to be introduced, and the low-temperature correction parameter of the Magnus formula is corresponding to a=17.625 and b= 243.04 ℃.
In an embodiment, after the real-time temperature and humidity data acquired by the temperature and humidity sensor are acquired, the method further comprises judging whether a dehumidification starting condition is met according to the real-time environment temperature and the relative humidity, and if yes, introducing dry air to dehumidify through a demisting device.
In this embodiment, whether a dehumidification starting condition is met is determined according to the real-time ambient temperature and the relative humidity, if yes, dry air is introduced through a demisting device to dehumidify, and specifically, if the real-time ambient temperature is in a passenger comfort zone and the relative humidity is greater than a preset humidity threshold, the dehumidification starting condition is determined to be met, at the moment, a dehumidification function of the demisting device (such as an air conditioner) is started, and dew point temperature in a car cabin is reduced through the introduction of the dry air, so that a demisting/anti-fog effect is achieved.
S120, carrying out partition temperature measurement on a target space by means of a thermopile array sensor to obtain the region temperature of each pixel region in the target space.
In this embodiment, the thermopile array sensor is used to measure the temperature of the target space in a partitioning manner, so as to obtain the region temperature of each pixel region in the target space, and the response time of the thermopile array sensor is less than 50ms, so that the response speed of the demisting system can be effectively improved.
The thermopile array sensor is disposed at a position above the middle of the rear row of the automobile cabin, the field of view of the thermopile array sensor covers a target area (as shown in fig. 4), the target area comprises a plurality of pixel areas, and if the pixel specification of the thermopile array sensor is 32×32, the distribution situation of temperature measurement pixels of each pixel area in the corresponding target area is shown in fig. 5.
In one embodiment, step S120 includes measuring the temperature of the target space by means of a thermopile array sensor to obtain a real-time initial temperature of each pixel region, configuring dedicated response coefficients for each pixel region according to pre-divided key regions and non-key regions, and calculating a region temperature of each pixel region by combining the real-time initial temperature of each pixel region and the corresponding response coefficients.
In the embodiment, the temperature of the target space is measured by means of a thermopile array sensor to obtain real-time initial temperatures of the pixel areas, dedicated response coefficients are configured for the pixel areas according to pre-divided key areas and non-key areas, the real-time initial temperatures of the pixel areas and the corresponding response coefficients are combined to calculate the area temperatures of the pixel areas, specifically, a differential processing strategy is adopted, the dedicated response coefficients are configured for the pixel areas in the key areas, correction is performed through a multi-section piecewise function or a nonlinear function, so that the temperature measurement precision of the key areas is improved, and the general response coefficients are configured for the pixel areas in the non-key areas, or fine processing is not needed, so that the real-time initial temperatures are directly used as the area temperatures. The differential processing strategy can meet the basic temperature measurement requirement of non-key areas, and avoid the increase of system load caused by excessive operation.
As shown in fig. 6, the key area includes a main key area (gray pixel) and a sub key area (light gray pixel), specifically, a pixel area corresponding to a front windshield, a side window and a middle rearview mirror, wherein the gray pixel covers the main key area (highest priority), the light gray pixel covers the sub key area (second priority but still belongs to the key category), a dedicated response coefficient is configured for the pixel area in the main key area, and the correction is performed through a multi-segment piecewise function or a nonlinear function, so that the temperature measurement precision of the main key area is improved, a dedicated response coefficient is configured for the pixel area in the sub key area, and the complex correction flow is skipped. In addition to the key areas, the pixel areas such as the seat in the car, the non-glass joint area of the center console, the non-side window related area of the inner decorative board of the car door and the like are non-key areas.
In an embodiment, after calculating the area temperature of each pixel area by combining the real-time initial temperature of each pixel area and the corresponding response coefficient, acquiring the temperature change trend of the area temperature of each pixel area, and determining the pixel area with the area temperature higher than the critical temperature and the difference value within a preset interval and the continuously reduced temperature change trend as the condensation area.
In the embodiment, the region temperature of each pixel region is obtained, the temperature change trend (such as rising, falling and stabilizing) of the pixel region along with time is analyzed, and the pixel region with the region temperature higher than the critical temperature, the difference value between the region temperature and the critical temperature within a preset interval and the temperature change trend continuously falling is determined as a potential condensation region.
S130, calculating the critical temperature according to the dew point temperature and a preset temperature difference threshold value.
In this embodiment, the critical temperature T c is calculated according to the dew point temperature T d and a preset temperature difference threshold Δt, where T c=Td +Δt.
In one embodiment, before step S130, the method further comprises the steps of acquiring the real-time cabin space temperature acquired by the cabin temperature sensor, and calculating the temperature difference threshold according to the real-time environment temperature, the vehicle running speed and the real-time cabin space temperature.
In this embodiment, the weight of the influence of the real-time ambient temperature on the cabin is determined according to the running speed of the vehicle, and the temperature difference threshold is calculated by combining the real-time cabin space temperature, and preferably, the temperature difference threshold is finely adjusted according to seasons.
S140, combining the critical temperature, and predicting the condensation area according to the area temperature of each pixel area.
In this embodiment, the condensation area is predicted based on the area temperature of each pixel area in combination with the critical temperature, and specifically, the pixel area having the area temperature less than the critical temperature is determined as the condensation area.
In one embodiment, the step S140 further includes comparing the area temperature of each pixel area with the critical temperature, and determining the pixel area having the area temperature less than the critical temperature as the condensation area.
In this embodiment, the region temperature of each pixel region is compared with the critical temperature, and the pixel region having the region temperature less than the critical temperature is determined as the condensation region. For example, if the critical temperature of a certain pixel region of the front windshield is 15 ℃, the region of the pixel region is determined to be the condensation region when the region is reduced to 14 ℃.
S150, controlling the demisting equipment to demist the condensation area.
In this embodiment, the heating function of the demisting device (such as an air conditioner) is turned on, and the demisting/anti-fog function is realized by adjusting the air outlet direction of the demisting device to heat the junction area.
In summary, according to the embodiment of the invention, the thermopile array sensor is used for carrying out partition temperature measurement on the target space, so as to obtain the region temperature of each pixel region in the target space, thereby realizing the full coverage of the target region, improving the response precision, further accurately judging the occurrence position of the fogging phenomenon and realizing the directional response.
Fig. 2 is a schematic block diagram of an automobile windshield defogging device according to an embodiment of the present invention. As shown in fig. 2, corresponding to the above method for defogging automobile windshield glass, the invention further provides an automobile windshield glass defogging device, wherein the device is configured in a controller of a defogging system, the defogging system further comprises a temperature and humidity sensor, a thermopile array sensor and a cabin temperature sensor, and the temperature and humidity sensor, the thermopile array sensor and the cabin temperature sensor are all in communication connection with the controller through a data interaction interface to realize data transmission. Specifically, referring to fig. 2, the defogging device 700 for a windshield of an automobile includes:
the acquisition unit 701 is used for acquiring dew point temperature according to real-time temperature and humidity data acquired by the temperature and humidity sensor;
The temperature measurement unit 702 is used for carrying out partition temperature measurement on a target space by means of the thermopile array sensor to obtain the region temperature of each pixel region in the target space;
A calculating unit 703, configured to calculate a critical temperature according to the dew point temperature and a preset temperature difference threshold;
A prediction unit 704, configured to predict a condensation area according to an area temperature of each pixel area in combination with the critical temperature;
And a defogging unit 705 for controlling the defogging device to defog the dew area.
In some embodiments, the prediction unit 704 is specifically configured to, when performing the step of predicting the condensation area according to the area temperature of each pixel area in combination with the critical temperature:
and judging the pixel region with the region temperature smaller than the critical temperature as a condensation region.
In some embodiments, the temperature measurement unit 702 is specifically configured to, when performing the step of performing the area temperature measurement of the target space by using the thermopile array sensor to obtain the area temperature of each pixel area in the target space:
The method comprises the steps of measuring the temperature of a target space by means of a thermopile array sensor to obtain real-time initial temperature of each pixel region, configuring exclusive response coefficients for each pixel region according to pre-divided key regions and non-key regions, and calculating the region temperature of each pixel region by combining the real-time initial temperature of each pixel region and the corresponding response coefficients.
In some embodiments, the temperature measurement unit 702 is further configured to, after performing the step of calculating the area temperature of each pixel area by combining the real-time initial temperature of each pixel area with the corresponding response coefficient:
and determining the pixel region with the region temperature higher than the critical temperature, the difference value between the region temperature and the critical temperature within a preset interval and the continuously-decreasing temperature change trend as a condensation region.
In some embodiments, the calculating unit 703 is further configured to, before performing the step of calculating the critical temperature according to the dew point temperature and the preset temperature difference threshold value:
and calculating the temperature difference threshold according to the real-time environment temperature, the vehicle running speed and the real-time cabin space temperature.
In some embodiments, the acquiring unit 701 is specifically configured to, when performing the step of acquiring the dew point temperature according to the real-time temperature and humidity data acquired by the temperature and humidity sensor:
the method comprises the steps of acquiring real-time temperature and humidity data acquired by a temperature and humidity sensor, wherein the real-time temperature and humidity data comprise real-time environment temperature and relative humidity, and calculating the real-time environment temperature and the relative humidity according to a humidity related calculation formula to obtain corresponding dew point temperature.
In some embodiments, the acquiring unit 701 is further configured to, after performing the step of acquiring the real-time temperature and humidity data acquired by the temperature and humidity sensor:
judging whether a dehumidification starting condition is met according to the real-time environment temperature and the relative humidity, and if so, introducing dry air to dehumidify by a demisting device.
It should be noted that, as those skilled in the art can clearly understand, the specific implementation process of the foregoing automotive windshield defogging device and each unit may refer to the corresponding descriptions in the foregoing method embodiments, and for convenience and brevity of description, the detailed description is omitted herein.
The above-described automotive windshield defogging device may be implemented in the form of a computer program which is operable on an electronic device as shown in fig. 3.
Referring to fig. 3, fig. 3 is a schematic block diagram of an electronic device according to an embodiment of the present invention. The electronic device 800 may be a terminal or a server, where the terminal may be an electronic device having a communication function. The server may be an independent server or a server cluster formed by a plurality of servers.
With reference to fig. 3, the electronic device 800 includes a processor 802, a memory, and a network interface 805, which are connected by a system bus 801, wherein the memory may include a non-volatile storage medium 803 and an internal memory 804.
The nonvolatile storage medium 803 may store an operating system 8031 and a computer program 8032. The computer program 8032 includes program instructions that, when executed, cause the processor 802 to perform a method of defogging an automotive windshield.
The processor 802 is operable to provide computing and control capabilities to support the operation of the overall electronic device 800.
The internal memory 804 provides an environment for the execution of a computer program 8032 in the non-volatile storage medium 803, which computer program 8032, when executed by the processor 802, causes the processor 802 to perform a method for defogging a windshield of a vehicle.
The network interface 805 is used for network communication with other devices. It will be appreciated by those skilled in the art that the structure shown in fig. 3 is merely a block diagram of a portion of the structure associated with the present inventive arrangements and is not limiting of the electronic device 800 to which the present inventive arrangements are applied, and that a particular electronic device 800 may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
Wherein the processor 802 is configured to execute a computer program 8032 stored in the memory, so as to implement the following steps:
The method comprises the steps of acquiring dew point temperature according to real-time temperature and humidity data acquired by a temperature and humidity sensor, carrying out partition temperature measurement on a target space by means of a thermopile array sensor to obtain area temperature of each pixel area in the target space, calculating critical temperature according to the dew point temperature and a preset temperature difference threshold value, predicting a dew point area according to the area temperature of each pixel area by combining the critical temperature, and controlling demisting equipment to demist the dew point area.
In some embodiments, when implementing the step of predicting the condensation area according to the area temperature of each pixel area in combination with the critical temperature, the processor 802 specifically implements the following steps:
and judging the pixel region with the region temperature smaller than the critical temperature as a condensation region.
In some embodiments, the processor 802, when implementing the step of performing the partition temperature measurement on the target space by means of the thermopile array sensor to obtain the area temperature of each pixel area in the target space, specifically implements the following steps:
The method comprises the steps of measuring the temperature of a target space by means of a thermopile array sensor to obtain real-time initial temperature of each pixel region, configuring exclusive response coefficients for each pixel region according to pre-divided key regions and non-key regions, and calculating the region temperature of each pixel region by combining the real-time initial temperature of each pixel region and the corresponding response coefficients.
In some embodiments, after implementing the step of calculating the region temperature of each of the pixel regions by combining the real-time initial temperature of each of the pixel regions with the corresponding response coefficients, the processor 802 further implements the steps of:
and determining the pixel region with the region temperature higher than the critical temperature, the difference value between the region temperature and the critical temperature within a preset interval and the continuously-decreasing temperature change trend as a condensation region.
In some embodiments, before implementing the step of calculating the critical temperature according to the dew point temperature and the preset temperature difference threshold, the processor 802 further implements the following steps:
and calculating the temperature difference threshold according to the real-time environment temperature, the vehicle running speed and the real-time cabin space temperature.
In some embodiments, when the processor 802 performs the step of acquiring the dew point temperature according to the real-time temperature and humidity data acquired by the temperature and humidity sensor, the following steps are specifically implemented:
the method comprises the steps of acquiring real-time temperature and humidity data acquired by a temperature and humidity sensor, wherein the real-time temperature and humidity data comprise real-time environment temperature and relative humidity, and calculating the real-time environment temperature and the relative humidity according to a humidity related calculation formula to obtain corresponding dew point temperature.
In some embodiments, after the step of acquiring the real-time temperature and humidity data acquired by the temperature and humidity sensor, the processor 802 further performs the following steps:
judging whether a dehumidification starting condition is met according to the real-time environment temperature and the relative humidity, and if so, introducing dry air to dehumidify by a demisting device.
It should be appreciated that in embodiments of the present invention, the Processor 802 may be a central processing unit (Central Processing Unit, CPU), the Processor 802 may also be other general purpose processors, digital signal processors (DIGITAL SIGNAL processors, DSPs), application SPECIFIC INTEGRATED Circuits (ASICs), off-the-shelf Programmable gate arrays (Field-Programmable GATE ARRAY, FPGA) or other Programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. Wherein the general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
Those skilled in the art will appreciate that all or part of the flow in a method embodying the above described embodiments may be accomplished by computer programs instructing the relevant hardware. The computer program comprises program instructions, and the computer program can be stored in a storage medium, which is a computer readable storage medium. The program instructions are executed by at least one processor in the computer system to implement the flow steps of the embodiments of the method described above.
Accordingly, the present invention also provides a storage medium. The storage medium may be a computer readable storage medium. The storage medium stores a computer program, wherein the computer program includes program instructions. The program instructions, when executed by the processor, cause the processor to perform the steps of:
The method comprises the steps of acquiring dew point temperature according to real-time temperature and humidity data acquired by a temperature and humidity sensor, carrying out partition temperature measurement on a target space by means of a thermopile array sensor to obtain area temperature of each pixel area in the target space, calculating critical temperature according to the dew point temperature and a preset temperature difference threshold value, predicting a dew point area according to the area temperature of each pixel area by combining the critical temperature, and controlling demisting equipment to demist the dew point area.
In one embodiment, when the processor executes the program instructions to implement the step of predicting the condensation area according to the area temperature of each pixel area in combination with the critical temperature, the processor specifically implements the following steps:
and judging the pixel region with the region temperature smaller than the critical temperature as a condensation region.
In one embodiment, when the processor executes the program instructions to implement the step of performing zone temperature measurement on the target space by means of the thermopile array sensor to obtain the zone temperature of each pixel zone in the target space, the processor specifically implements the following steps:
The method comprises the steps of measuring the temperature of a target space by means of a thermopile array sensor to obtain real-time initial temperature of each pixel region, configuring exclusive response coefficients for each pixel region according to pre-divided key regions and non-key regions, and calculating the region temperature of each pixel region by combining the real-time initial temperature of each pixel region and the corresponding response coefficients.
In one embodiment, after the processor executes the program instructions to implement the step of calculating the area temperature of each pixel area by combining the real-time initial temperature of each pixel area with the corresponding response coefficient, the method further includes the steps of:
and determining the pixel region with the region temperature higher than the critical temperature, the difference value between the region temperature and the critical temperature within a preset interval and the continuously-decreasing temperature change trend as a condensation region.
In one embodiment, before executing the program instructions to implement the step of calculating the critical temperature according to the dew point temperature and a preset temperature difference threshold, the processor further implements the steps of:
and calculating the temperature difference threshold according to the real-time environment temperature, the vehicle running speed and the real-time cabin space temperature.
In an embodiment, when the processor executes the program instruction to implement the step of acquiring the dew point temperature according to the real-time temperature and humidity data acquired by the temperature and humidity sensor, the method specifically includes the following steps:
the method comprises the steps of acquiring real-time temperature and humidity data acquired by a temperature and humidity sensor, wherein the real-time temperature and humidity data comprise real-time environment temperature and relative humidity, and calculating the real-time environment temperature and the relative humidity according to a humidity related calculation formula to obtain corresponding dew point temperature.
In an embodiment, after the processor executes the program instructions to implement the step of acquiring real-time temperature and humidity data acquired by the temperature and humidity sensor, the processor further implements the following steps:
judging whether a dehumidification starting condition is met according to the real-time environment temperature and the relative humidity, and if so, introducing dry air to dehumidify by a demisting device.
The storage medium may be a U-disk, a removable hard disk, a Read-Only Memory (ROM), a magnetic disk, or an optical disk, or other various computer-readable storage media that can store program codes.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps described in connection with the embodiments disclosed herein may be embodied in electronic hardware, in computer software, or in a combination of the two, and that the elements and steps of the examples have been generally described in terms of function in the foregoing description to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the several embodiments provided by the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of each unit is only one logic function division, and there may be another division manner in actual implementation. For example, multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed.
The steps in the method of the embodiment of the invention can be sequentially adjusted, combined and deleted according to actual needs. The units in the device of the embodiment of the invention can be combined, divided and deleted according to actual needs. In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The integrated unit may be stored in a storage medium if implemented in the form of a software functional unit and sold or used as a stand-alone product. Based on such understanding, the technical solution of the present invention is essentially or a part contributing to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, comprising several instructions for causing an electronic device (which may be a personal computer, a terminal, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (7)
1. A method of defogging an automotive windshield, the method comprising:
acquiring dew point temperature according to real-time temperature and humidity data acquired by a temperature and humidity sensor;
carrying out partition temperature measurement on a target space by means of a thermopile array sensor to obtain the region temperature of each pixel region in the target space;
calculating a critical temperature according to the dew point temperature and a preset temperature difference threshold;
predicting a condensation area according to the area temperature of each pixel area by combining the critical temperature;
controlling demisting equipment to demist the dew area;
The predicting the condensation area according to the area temperature of each pixel area by combining the critical temperature comprises the following steps:
comparing the region temperature of each pixel region with the critical temperature;
Determining a pixel region having the region temperature less than the critical temperature as a condensation region;
the method for carrying out partition temperature measurement on the target space by means of the thermopile array sensor to obtain the region temperature of each pixel region in the target space comprises the following steps:
Measuring the temperature of the target space by means of a thermopile array sensor to obtain the real-time initial temperature of each pixel region;
configuring exclusive response coefficients for each pixel region according to pre-divided key regions and non-key regions;
calculating the area temperature of each pixel area by combining the real-time initial temperature of each pixel area and the corresponding response coefficient;
The dew point temperature is obtained according to real-time temperature and humidity data acquired by a temperature and humidity sensor, and the method comprises the following steps:
Acquiring real-time temperature and humidity data acquired by the temperature and humidity sensor, wherein the real-time temperature and humidity data comprises real-time environment temperature and relative humidity;
and calculating the real-time environment temperature and the relative humidity according to a humidity-related calculation formula to obtain a corresponding dew point temperature.
2. The method for defogging an automotive windshield according to claim 1, wherein said calculating the area temperature of each of said pixel areas by combining the real-time initial temperature of each of said pixel areas with the corresponding response coefficient further comprises:
acquiring a temperature change trend of the region temperature of each pixel region;
and determining a pixel region with the region temperature higher than the critical temperature, the difference value between the region temperature and the critical temperature within a preset interval and the temperature change trend continuously decreasing as a condensation region.
3. The method for defogging an automotive windshield according to claim 1, wherein before calculating a critical temperature according to the dew-point temperature and a preset temperature difference threshold value, further comprising:
acquiring real-time cabin space temperature acquired by a cabin temperature sensor;
and calculating the temperature difference threshold according to the real-time environment temperature, the vehicle running speed and the real-time cabin space temperature.
4. The method for defogging an automobile windshield according to claim 1, wherein after the acquiring the real-time temperature and humidity data acquired by the temperature and humidity sensor, the method further comprises:
judging whether a dehumidification starting condition is met or not according to the real-time environment temperature and the relative humidity;
If so, dry air is introduced through a demisting device to dehumidify.
5. An automotive windshield defogging device, said device comprising:
The acquisition unit is used for acquiring dew point temperature according to real-time temperature and humidity data acquired by the temperature and humidity sensor;
The temperature measuring unit is used for carrying out partition temperature measurement on the target space by means of the thermopile array sensor to obtain the area temperature of each pixel area in the target space;
The calculating unit is used for calculating the critical temperature according to the dew point temperature and a preset temperature difference threshold value;
a prediction unit, configured to predict a condensation area according to an area temperature of each pixel area in combination with the critical temperature;
The demisting unit is used for controlling demisting equipment to demist the dew area;
the prediction unit is also used for comparing the area temperature of each pixel area with the critical temperature, and judging the pixel area with the area temperature smaller than the critical temperature as a condensation area;
The temperature measuring unit is also used for measuring the temperature of the target space by means of the thermopile array sensor to obtain the real-time initial temperature of each pixel region, configuring the exclusive response coefficient for each pixel region according to the pre-divided key region and non-key region;
The acquisition unit is also used for acquiring real-time temperature and humidity data acquired by the temperature and humidity sensor, wherein the real-time temperature and humidity data comprise real-time environment temperature and relative humidity, and the real-time environment temperature and the relative humidity are calculated according to a humidity related calculation formula to obtain corresponding dew point temperature.
6. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor, when executing the computer program, implements the method of defogging an automotive windshield of any of claims 1-4.
7. A computer readable storage medium, characterized in that the storage medium stores a computer program comprising program instructions which, when executed by a processor, cause the processor to perform the method of defogging an automotive windshield according to any of the claims 1-4.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014008173A1 (en) * | 2012-07-06 | 2014-01-09 | Guardian Industries Corp. | Moisture sensor and/or defogger with bayesian improvements, and related methods |
| JP2018118529A (en) * | 2017-01-23 | 2018-08-02 | 株式会社デンソー | Air conditioner for vehicles |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014008173A1 (en) * | 2012-07-06 | 2014-01-09 | Guardian Industries Corp. | Moisture sensor and/or defogger with bayesian improvements, and related methods |
| JP2018118529A (en) * | 2017-01-23 | 2018-08-02 | 株式会社デンソー | Air conditioner for vehicles |
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