Passenger compartment temperature control method and system and vehicle

Abstract

The invention provides a passenger cabin temperature control method and system and a vehicle. The method specifically comprises the following steps: (1) receiving a temperature distribution heat map and a driver and passenger image sent by an infrared imaging device and a camera; (2) acquiring actual body surface temperatures of all drivers and passengers in a passenger compartment; and (3) the air outlet volume and / or the air outlet temperature of an air outlet in the temperature control area are / is controlled, so that the actual body surface temperature of the driver and passengers in the temperature control area reaches the set target body surface temperature. The air outlet volume and the air outlet temperature of the air outlet of the temperature control area are controlled based on the actual body surface temperature of the driver and the set target body surface temperature, zoning control over the temperature in the passenger compartment is achieved, and the individual requirements of a user can be better met.

Description

Technical Field

[0001] The present invention relates to the technical field of temperature control, and provides a passenger compartment temperature control method, system and vehicle. Background Art

[0002] With the rapid development of the automobile industry and consumers' increasing requirements for automobile comfort, vehicles have gradually developed into an intelligent private space integrating entertainment. As an important device for regulating the in-car environment, automobile air conditioners are subject to increasing demand for intelligence and personalization.

[0003] Traditional automobile air conditioning temperature control systems mainly rely on temperature sensors to detect the temperature inside the car, and control the air volume and temperature of the air conditioner according to the preset target temperature so that the temperature inside the car reaches the set temperature.

[0004] The above temperature control method ignores the individual temperature perception differences among drivers and passengers, as well as the temperature differences at different locations in the passenger compartment, resulting in unsatisfactory temperature control effects and failure to meet the personalized needs of passengers. Summary of the invention

[0005] In view of this, the present application provides a temperature control method for a passenger compartment, aiming to improve the above-mentioned problems.

[0006] Specifically, the following technical solutions are included:

[0007] On the one hand, an embodiment of the present application provides a passenger compartment temperature control method, and the method is specifically as follows:

[0008] (1) Receive temperature distribution heat maps and images of drivers and passengers sent by infrared imaging devices and cameras;

[0009] (2) Obtain the actual body surface temperature of all passengers in the passenger compartment;

[0010] (3) Controlling the air volume and / or air temperature of the air outlets in the temperature control zone so that the actual body surface temperature of the driver and passengers in the temperature control zone reaches the set target body surface temperature.

[0011] In some embodiments of the present invention, after receiving a thermal image of temperature distribution captured by an infrared imaging device, the temperature distribution in the thermal image is transformed into an image of the driver and passenger, and a target area of ​​the face of each driver and passenger is extracted from the image of the driver and passenger, and the average temperature of the target area is used as the actual body surface temperature of the corresponding driver and passenger.

[0012] In some embodiments of the present invention, the method for reading the target body surface temperature is as follows:

[0013] After receiving the driver and occupant image, the facial image of each driver and occupant in the driver and occupant image is extracted, the facial image is compared with the stored facial image, the identity of the driver and occupant corresponding to the facial image is determined, and the target body surface temperature set for the corresponding driver and occupant is read.

[0014] In some embodiments of the present invention, the method for setting the target body surface temperature is specifically as follows:

[0015] The motion state of each occupant in the passenger compartment is detected. For occupants in a sleeping state, their current target body surface temperature is set as the second target body surface temperature in the sleeping state. For occupants in a moving state, their current target body surface temperature is set as the first target body surface temperature. The second target body surface temperature of the same occupant is generally higher than the first target body surface temperature.

[0016] In some embodiments of the present invention, the method for determining the motion state of each driver and passenger is as follows:

[0017] If the position and posture of the driver and passenger in the image does not change in several consecutive frames of the driver and passenger images, and his or her eyes are in a closed state, it is determined that the corresponding driver and passenger is in a sleeping state; otherwise, it is determined that the driver and passenger is in a moving state.

[0018] In some embodiments of the present invention, the sleep state detection process of the driver and passenger is specifically as follows:

[0019] (21) comparing the currently acquired driver and passenger image with the previous frame of driver and passenger image to detect whether the position of each passenger in the image has changed;

[0020] (22) For the driver or passenger whose position has not changed, execute step (23); for the driver or passenger whose posture has not changed, set the counting frame to zero and execute step (21);

[0021] (23) Detect whether the corresponding driver or passenger is in a closed-eye state. If the detection result is yes, then add 1 to the count frame and execute step (21). If the detection result is no, set the count frame to zero and execute step (21);

[0022] (24) If the counting frames of the driver or passenger reach the set counting threshold, it is determined that the corresponding driver or passenger is in a sleeping state.

[0023] In some embodiments of the present invention, the distance between the driver's face and the air outlet in the temperature control zone where the driver is located is detected based on the driver's image, and the air volume and air temperature of the air outlet in the temperature control zone where the driver is located are adjusted based on the distance.

[0024] In some embodiments of the present invention, the method for determining the distance between the driver's face and the air outlet in the temperature control zone where the driver is located is as follows:

[0025] The center of the air outlet in all temperature control areas is determined as the position in the driver and passenger image, the center of the target area of ​​each driver and passenger's face is extracted in the currently collected driver and passenger image, and the distance from the center of the target area to the center of the air outlet in the temperature control area is calculated, and the distance is recognized as the distance between the driver and passenger and the air outlet.

[0026] On the other hand, an embodiment of the present application provides a passenger compartment temperature control system, the system comprising:

[0027] An air outlet is set in each temperature control zone, and one seat corresponds to one temperature control zone;

[0028] Infrared imaging device and camera located in front of the vehicle;

[0029] A vehicle air conditioning controller connected to the infrared imaging device and the camera;

[0030] The vehicle air conditioning controller controls the air volume and temperature of the corresponding air outlet based on the above-mentioned passenger compartment temperature control method, so that the actual body surface temperature of the driver and passengers in the temperature control area reaches the set target body surface temperature.

[0031] On the other hand, an embodiment of the present application provides a vehicle on which the above-mentioned passenger compartment temperature control system is integrated.

[0032] The present invention controls the air volume and air temperature of the air outlets in the temperature control area based on the actual body surface temperature of the driver and the passenger and the set target body surface temperature, thereby realizing the zoned control of the temperature in the passenger compartment and better meeting the personalized needs of the users. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 A schematic diagram of the structure of a passenger compartment temperature control system provided by an embodiment of the present invention;

[0035] Figure 2 A flow chart of a passenger compartment temperature control method provided in Embodiment 1 of the present invention;

[0036] Figure 3 A flow chart of a temperature control method for a passenger compartment provided in Embodiment 2 of the present invention;

[0037] Figure 4 This is a flow chart of a passenger compartment temperature control method provided in Embodiment 3 of the present invention.

[0038] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meanings as commonly understood by those of ordinary skill in the art.

[0041] Figure 1 The structural diagram of the passenger compartment temperature control system provided by the embodiment of the present invention is shown. For the convenience of description, only the part related to the embodiment of the present invention is shown. The system includes:

[0042] The passenger cabin is divided into several temperature control zones, one seat corresponds to one temperature control zone, and an air outlet is provided in each temperature control zone;

[0043] Infrared imaging devices and cameras located in the front of the vehicle, such as above the central rearview mirror, to ensure that the entire interior space can be covered and obtain thermal images of the temperature distribution of the occupants in the vehicle as well as images of the driver and passengers;

[0044] A vehicle air conditioning controller that is communicatively connected to the infrared imaging device and the camera;

[0045] The vehicle air conditioning controller controls the air volume and temperature of the corresponding air outlet based on the following temperature control method, so that the actual body surface temperature of the driver and passengers in the temperature control area reaches the set target body surface temperature.

[0046] Figure 2 This is a flow chart of a passenger compartment temperature control method provided by an embodiment of the present invention. The method comprises the following steps:

[0047] (1) The infrared imaging device and the camera are started, and the infrared imaging device and the camera simultaneously send the collected temperature distribution thermal images of all the passengers in the passenger compartment and the images of the passengers to the vehicle air conditioning controller;

[0048] (2) The vehicle air conditioning controller obtains the body surface temperature of all passengers in the passenger compartment;

[0049] (3) Controlling the air volume and / or air temperature of the air outlets in the temperature control zone so that the body surface temperature of the driver and passengers in the temperature control zone reaches the set target body surface temperature.

[0050] In an embodiment of the present invention, the transformation posture T between the temperature distribution thermal image collected by the infrared imaging device and the driver and passenger image collected by the camera is completed in advance. After receiving the temperature distribution thermal image collected by the infrared imaging device, the vehicle air conditioning controller transforms the temperature distribution in the thermal image to the driver and passenger image based on the transformation posture T, extracts the target area of ​​each driver and passenger's face in the driver and passenger image, and uses the average temperature of the target area as the body surface temperature of the corresponding driver and passenger. In an embodiment of the present invention, a rectangular area is established with the facial breathing point (nose) of each driver and passenger as the center. The rectangular area is the target area, and the target area is 300 mm long and 200 mm wide.

[0051] In an embodiment of the present invention, after receiving the driver and passenger image, the vehicle air-conditioning controller extracts the facial image of each driver and passenger in the driver and passenger image, compares the facial image with the stored facial image, determines the identity of the driver and passenger corresponding to the facial image, and reads the target parameters set for the corresponding driver and passenger, including the target body surface temperature.

[0052] A personalized parameter table is stored in the vehicle air-conditioning controller, which records the identity of the driver and passengers, the link address of the facial image corresponding to the identity, and the personalized parameters set by the driver and passengers corresponding to the identity, including the target body surface temperature. The facial images of the driver and passengers are stored in the storage unit. The storage unit can be integrated in the vehicle air-conditioning controller or set independently of the vehicle air-conditioning controller.

[0053] In an embodiment of the present invention, when collecting temperature distribution thermal images and passenger images of the occupants in the passenger compartment by means of an infrared imaging device and a camera, when the face of the occupant is in a deflected state, it is impossible to extract a complete facial image from the occupant image or only a partial facial image can be extracted, which means that the complete target area may not be obtained at this time, or the identity of the occupant cannot be determined. Therefore, the actual body surface temperature and target body surface temperature of the occupant cannot be determined at this time. Since the sampling frequency of the infrared imaging device and the camera is relatively high, the time difference between the current moment and the previous moment is very small. Therefore, the actual body surface temperature and target body surface temperature of the occupant at the previous moment are used as the actual body surface temperature and target body surface temperature of the occupant at the current moment.

[0054] Figure 3 This is a flow chart of a temperature control method for a passenger compartment provided in Embodiment 2 of the present invention. The method comprises the following steps:

[0055] In an embodiment of the present invention, the state of the driver and passenger is divided into a sleeping state and a motion state in a non-sleeping state. Based on this, the target body surface temperature is divided into a first target body surface temperature in an active state and a second target body surface temperature in a sleeping state. The second target body surface temperature of the same driver and passenger is generally higher than the first target body surface temperature. The vehicle air conditioning controller detects the motion state of each driver and passenger in the passenger compartment. For a driver and passenger in a sleeping state, the current target body surface temperature is set to the second target body surface temperature in the sleeping state. For a driver and passenger in a motion state, the current target body surface temperature is set to the first target body surface temperature. The first target body surface temperature and the second target body surface temperature are both personalized parameters set by the user, or the second target body surface temperature is formed by increasing a specified temperature degree on the basis of the first target body surface temperature.

[0056] In an embodiment of the present invention, the vehicle air conditioning controller detects the motion state of the driver and passenger based on the image of the driver and passenger collected by the camera. The detection method is as follows: if the posture of the driver and passenger in the image does not change in the driver and passenger images of several consecutive frames, and the driver and passenger's eyes are in a closed state, it is determined that the corresponding driver and passenger is in a sleeping state; otherwise, it is determined that the driver and passenger is in a moving state. The detection process is as follows:

[0057] (21) comparing the currently acquired driver and passenger image with the previous frame of driver and passenger image to detect whether the position of each passenger in the image has changed;

[0058] (22) For the driver or passenger whose position has not changed, execute step (23); for the driver or passenger whose posture has not changed, set the counting frame to zero and execute step (21);

[0059] (23) Detect whether the corresponding driver or passenger is in a closed-eye state. If the detection result is yes, then add 1 to the count frame and execute step (21). If the detection result is no, set the count frame to zero and execute step (21);

[0060] (24) If the counted frames of the driver or passenger reach the set count threshold N, it is determined that the corresponding driver or passenger is in a sleeping state.

[0061] The vehicle air-conditioning controller periodically detects the motion status of the occupants in the passenger compartment. After the current detection time of the occupant's motion status is reached, if the position of the occupant in N+1 consecutive occupant image frames remains basically unchanged during the subsequent detection period, it is determined that the corresponding occupant is in a sleeping state.

[0062] The current target body surface temperature of the corresponding driver and passenger is determined based on the movement status of each driver and passenger. The target body surface temperature will change adaptively with the movement status of the driver and passenger. For example, when a child in the back row falls asleep after playing for a while, the air volume and air temperature of the air outlet in the temperature control area where the child is located will change adaptively, so that the child's actual body surface temperature is at the target body surface temperature corresponding to the two movement states, which greatly improves the user's physical sensation.

[0063] Figure 4 This is a flow chart of a passenger compartment temperature control method provided by Embodiment 3 of the present invention. Embodiment 3, based on the technical solutions described in Embodiment 1 and Embodiment 2, further includes the following steps:

[0064] Based on the images of the driver and passenger collected by the camera, the distance between the driver and passenger's face and the air outlet in the temperature control zone where they are located is detected, and the air volume and air outlet temperature of the air outlet in the temperature control zone where they are located are adjusted based on the distance.

[0065] In an embodiment of the present invention, a mapping table of air volumes and air temperatures at different temperature differences and distances is stored in the vehicle air-conditioning controller. The mapping table is obtained by actual vehicle calibration, and different temperature differences and distances are combined into a series of calibration points. The air outlet temperature calibration at different air volumes is completed under the working conditions corresponding to each calibration point, thereby forming the above-mentioned mapping table. When the driver and passengers are close to the air outlet, in order to improve the user's driving experience, it is best to reduce the air volume of the air outlet to avoid a large amount of cold air or hot air blowing directly onto the user's face, causing discomfort. In addition, the above-mentioned temperature difference is the difference between the actual body surface temperature of the driver and passengers and the current target body surface temperature.

[0066] In an embodiment of the present invention, the centers of the air outlets in all temperature control areas are calibrated as positions in the driver and passenger image, the centers of the target areas of the faces of the drivers and passengers are extracted in the currently acquired driver and passenger images, the distance from the center of the target area to the center of the air outlet in the temperature control area is calculated, the distance is identified as the distance between the driver and passenger and the air outlet, and the air volume and air temperature of the corresponding air outlet are adjusted based on the distance.

[0067] An embodiment of the present invention also provides a vehicle, which is integrated with the above-mentioned passenger compartment temperature control system. The passenger compartment temperature control system controls the air volume and air outlet temperature of each temperature control zone in the passenger compartment in real time based on the personalized parameters set by the driver and passengers, so that the actual body surface temperature of the driver and passengers in the temperature control area reaches the target body surface temperature in the current state.

[0068] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the present application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only.

[0069] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A passenger compartment temperature control method, characterized in that: The method is specifically as follows: (1) Receive temperature distribution heat maps and images of drivers and passengers sent by infrared imaging devices and cameras; (2) Obtain the actual body surface temperature of all passengers in the passenger compartment; (3) Controlling the air volume and / or air temperature of the air outlets in the temperature control zone so that the actual body surface temperature of the driver and passengers in the temperature control zone reaches the set target body surface temperature.

2. The passenger compartment temperature control method according to claim 1, characterized in that: After receiving the temperature distribution thermal image collected by the infrared imaging device, the temperature distribution in the thermal image is transformed into the driver and occupant image, the target area of ​​each driver and occupant's face is extracted in the driver and occupant image, and the average temperature of the target area is used as the actual body surface temperature of the corresponding driver and occupant.

3. The passenger compartment temperature control method according to claim 1, characterized in that: The method for reading the target body surface temperature is as follows: After receiving the driver and occupant image, the facial image of each driver and occupant in the driver and occupant image is extracted, the facial image is compared with the stored facial image, the identity of the driver and occupant corresponding to the facial image is determined, and the target body surface temperature set for the corresponding driver and occupant is read.

4. The passenger compartment temperature control method according to claim 1, characterized in that: The method for setting the target body surface temperature is as follows: The motion state of each occupant in the passenger compartment is detected. For occupants in a sleeping state, their current target body surface temperature is set as the second target body surface temperature in the sleeping state. For occupants in a moving state, their current target body surface temperature is set as the first target body surface temperature. The second target body surface temperature of the same occupant is generally higher than the first target body surface temperature.

5. The passenger compartment temperature control method according to claim 4, characterized in that: The specific method for determining the motion status of each driver and passenger is as follows: If the position and posture of the driver and passenger in the image does not change in several consecutive frames of the driver and passenger images, and his or her eyes are in a closed state, it is determined that the corresponding driver and passenger is in a sleeping state; otherwise, it is determined that the driver and passenger is in a moving state.

6. The passenger compartment temperature control method according to claim 5, characterized in that: The sleep status detection process of the driver and passengers is as follows: (21) comparing the currently acquired driver and passenger image with the previous frame of driver and passenger image to detect whether the position of each passenger in the image has changed; (22) For the driver or passenger whose position has not changed, execute step (23); for the driver or passenger whose posture has not changed, set the counting frame to zero and execute step (21); (23) Detect whether the corresponding driver or passenger is in a closed-eye state. If the detection result is yes, then add 1 to the count frame and execute step (21). If the detection result is no, set the count frame to zero and execute step (21); (24) If the counting frames of the driver or passenger reach the set counting threshold, it is determined that the corresponding driver or passenger is in a sleeping state.

7. The passenger compartment temperature control method according to claim 1, characterized in that: The distance between the driver's or occupant's face and the air outlet in the temperature control zone where the driver or occupant is located is detected based on the driver's or occupant's image, and the air volume and air temperature of the air outlet in the temperature control zone where the driver or occupant is located are adjusted based on the distance.

8. The passenger compartment temperature control method according to claim 8, characterized in that: The method for determining the distance between the driver's face and the air outlet in the temperature control zone is as follows: The center of the air outlet in all temperature control areas is determined as the position in the driver and passenger image, the center of the target area of ​​each driver and passenger's face is extracted in the currently collected driver and passenger image, and the distance from the center of the target area to the center of the air outlet in the temperature control area is calculated, and the distance is recognized as the distance between the driver and passenger and the air outlet.

9. A passenger compartment temperature control system, characterized in that: The system comprises: An air outlet is set in each temperature control zone, and one seat corresponds to one temperature control zone; Infrared imaging device and camera located in front of the vehicle; A vehicle air conditioning controller connected to the infrared imaging device and the camera; The vehicle air conditioning controller controls the air volume and temperature of the corresponding air outlet based on the passenger compartment temperature control method described in any one of claims 1 to 8, so that the actual body surface temperature of the driver and passengers in the temperature control area reaches the set target body surface temperature.

10. A vehicle, characterized in that: The vehicle is integrated with the passenger compartment temperature control system as claimed in claim 9.

Images