A passenger comfort adjustment system and control method

Abstract

This invention discloses an occupant comfort adjustment system and control method, including a comfort cloud computing platform, a cabin air conditioning system, a cabin environment detector, a seat surface temperature detector, a flow velocity detector, an occupant feature recognition device, and a seat temperature control system. The comfort cloud computing platform includes a human comfort database, a human model library, a pressure comfort calculation module, a thermal comfort calculation module, a convection-side collaborative calculation module, and a seat-side collaborative calculation module. The seat temperature control system includes a circulating water pump, an embedded heat exchange water plate, and a distributed magnetorheological fluid device. The comfort adjustment method of this invention, through the collaborative calculation and control of the velocity field, pressure field, and temperature field, and through joint control of the convection-side collaborative angle of two coupled fields and the seat-side collaborative performance of three coupled fields, can accurately control multiple adjustment modes. Based on the human PMV-PPD index, it can adaptively adjust to the characteristics of different occupants.

Description

Technical Field

[0001] This invention relates to the field of cabin comfort technology, and in particular to an occupant comfort adjustment system and control method. Background Technology

[0002] Ensuring passenger health and comfort while reducing energy consumption are key focuses of cabin environment research. The cabin is constantly exposed to a complex and ever-changing natural environment, and its confined space leads to intricate relationships between the external environment and the cabin, between the cabin and the passengers, and between the external environment and the passengers through radiation, convection, conduction, and evaporation. Simultaneously, the airflow from the vehicle's air conditioning system creates irregular airflow patterns within the passenger space. Under the coupling effect of the internal and external environments, passenger thermal comfort becomes even more complex. Furthermore, during long-distance driving, issues with passenger pressure comfort can easily lead to serious physical harm. Therefore, effectively improving passenger thermal and pressure comfort is a pressing issue that needs to be addressed. Summary of the Invention

[0003] This invention proposes an occupant comfort adjustment system and control method for adjusting the thermal and pressure comfort of occupants in the cabin environment.

[0004] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0005] An occupant comfort adjustment system includes a comfort cloud computing platform, a cabin air conditioning system, a cabin environment detector, a seat surface temperature detector, a flow rate detector, an occupant feature recognition device, and a seat temperature control system. The comfort cloud computing platform includes a human comfort database, a human model library, a pressure comfort calculation module, a thermal comfort calculation module, a convection-side collaborative calculation module, and a seat-side collaborative calculation module. The seat temperature control system includes a circulating water pump, an embedded heat exchange water plate, and a distributed magnetorheological fluid device.

[0006] A further feature of the present invention is that the embedded heat exchange water plate is "S"-shaped, made of flexible hose material, and embedded in the sponge layer of the seat; the distributed magnetorheological fluid controller is located between the seat suspension and the sponge layer and can adjust the damping strength according to the magnitude of the current.

[0007] Based on the above-described adjustment system, the present invention also provides a control method for an occupant comfort adjustment system, comprising the following steps:

[0008] Step 1: Using the occupant feature recognition device, occupant features are identified to obtain occupant feature information and three-dimensional point cloud of the body surface;

[0009] Step 2: Input the occupant's 3D point cloud into the human body model library, and use the nearest neighbor algorithm to query the distance error between the 3D point cloud and the model surface, thereby finding the human body model with the highest matching degree to the 3D point cloud.

[0010] Step 3: Input the retrieved human body model into the pressure comfort calculation module, and calculate the pressure vector distribution on the occupant's back by coupling it with the seat model;

[0011] Step 4: Obtain cabin ambient temperature, air humidity, relative humidity, air velocity, and solar radiation through the cabin environment detector, input them into the thermal comfort calculation module, and calculate the human PMV-PPD index by combining human characteristic information.

[0012] Step 5: The thermal comfort calculation module calculates the air velocity vector distribution on the air convection side of the human body and the temperature distribution gradient on the air convection side based on the cabin environment and the human body model.

[0013] Step 6: The convection-side collaborative calculation module calculates the collaborative angle between the air velocity vector on the air convection side and the human body temperature distribution gradient using the following formula, where β is the air convection-side collaborative angle. and These represent the air velocity vector on the air convection side and the gradient of human body temperature distribution, respectively. and These are the air velocity scalar and the temperature distribution gradient scalar on the air convection side, respectively.

[0014]

[0015] Step 7: If the current human body PMV-PPD index is ≥1, the cabin air conditioning system is in cold air mode. At the same time, the air convection side coordination angle β is judged. If β ≥ 10°, the air conditioning outlet air direction is adjusted to be perpendicular to the human body air convection side and the air speed is increased. If β ≤ 10°, the cabin air conditioning system temperature is reduced.

[0016] Step 8: If the current human body PMV-PPD index is ≤-1, the cabin air conditioning system is in warm air mode. At the same time, the air convection side coordination angle w is judged. If β≥10°, the air conditioning outlet air direction is adjusted to be perpendicular to the human body air convection side and the wind speed is increased. If β≤10°, the cabin air conditioning system temperature is increased.

[0017] Step 9: If the current human PMV-PPD index is between (-1, 1), then turn off the cabin air conditioning system;

[0018] Step 10, the seat-side collaborative calculation module calculates the synergy between the seat-side liquid flow velocity vector and the human body pressure distribution gradient and the human body temperature distribution gradient using the following formula, where w represents the seat-side synergy, u, These represent the fluid velocity vector on the seat side, the human body pressure distribution gradient, and the human body temperature distribution gradient, respectively.

[0019]

[0020] Step 11: If the seat surface temperature is higher than the suitable temperature for the human body, the seat temperature control system is in cooling mode. At the same time, the seat side synergy w is judged. If w ≥ 0.5, according to the human body pressure gradient distribution, the current of the distributed magnetorheological fluid device in the area with higher pressure is increased to reduce the damping force, and the current of the distributed magnetorheological fluid device in the area with lower pressure is reduced to increase the damping force, thereby making the human body pressure gradient distribution more uniform. At the same time, the circulating water pump is controlled to increase the liquid flow rate in the embedded heat exchange water plate. If w ≤ 0.5, the liquid temperature in the embedded heat exchange water plate is reduced.

[0021] Step 12: If the seat surface temperature is lower than the suitable temperature for the human body, the seat temperature control system is in heating mode. At the same time, the seat side synergy w is judged. If w ≥ 0.5, according to the human body pressure gradient distribution, the current of the distributed magnetorheological fluid device in the area with higher pressure is increased to reduce the damping force, and the current of the distributed magnetorheological fluid device in the area with lower pressure is reduced to increase the damping force, thereby making the human body pressure gradient distribution more uniform. At the same time, the circulating water pump is controlled to increase the liquid flow rate in the embedded heat exchange water plate. If w ≤ 0.5, the liquid temperature in the embedded heat exchange water plate is increased.

[0022] Step 13: If the seat surface temperature is equal to the body's suitable temperature, then based on the body's pressure gradient distribution, increase the current of the distributed magnetorheological fluid device in the area with higher pressure to reduce the damping force, and decrease the current of the distributed magnetorheological fluid device in the area with lower pressure to increase the damping force, thereby making the body's pressure gradient distribution more uniform.

[0023] More preferably, in step 1, the occupant characteristic information includes age, gender, body composition, metabolic rate, and clothing.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] Firstly, the occupant comfort adjustment method proposed in this invention can simultaneously improve the pressure comfort and thermal comfort of occupants by coordinating the calculation and control of the velocity field, pressure field, and temperature field, which is different from the limitation of traditional occupant comfort adjustment methods that only control a single comfort index.

[0026] Secondly, the comfort adjustment method proposed in this invention uses the combined control of the convection side coordination angle of two-field coupling and the seat side coordination performance of three-field coupling to accurately control multiple adjustment modes, thereby effectively adjusting human comfort in a diversified manner.

[0027] Thirdly, the comfort adjustment method proposed in this invention is based on the human PMV-PPD index, which can adaptively adjust according to the characteristics of different occupants, thereby realizing customized comfort adjustment schemes for different occupants, thus achieving higher adjustment efficiency. Attached Figure Description

[0028] Figure 1 This is the control flowchart of the occupant comfort adjustment system. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to embodiments. Those skilled in the art will understand that the following embodiments are for illustrative purposes only and should not be considered as limiting the scope of the present invention.

[0030] Example 1

[0031] An occupant comfort adjustment system, referring to Figure 1 It includes a comfort cloud computing platform, a cabin air conditioning system, a cabin environment detector, a seat surface temperature detector, a flow rate detector, an occupant feature recognition device, and a seat temperature control system. The comfort cloud computing platform includes a human comfort database, a human model library, a pressure comfort calculation module, a thermal comfort calculation module, a convection-side collaborative calculation module, and a seat-side collaborative calculation module. The seat temperature control system includes a circulating water pump, an embedded heat exchange water plate, and a distributed magnetorheological fluid device.

[0032] Example 2

[0033] According to the occupant comfort adjustment system provided in Embodiment 1, Embodiment 2 provides a control method for the occupant comfort adjustment system, including the following steps:

[0034] Step 1: Using the occupant feature recognition device, identify the occupant features and obtain occupant feature information and three-dimensional point cloud of the body surface. The occupant feature information includes age, gender, body composition, metabolic rate, and clothing.

[0035] Step 2: Input the occupant's 3D point cloud into the human body model library, and use the nearest neighbor algorithm to query the distance error between the 3D point cloud and the model surface, thereby finding the human body model with the highest matching degree to the 3D point cloud.

[0036] Step 3: Input the retrieved human body model into the pressure comfort calculation module, and calculate the pressure vector distribution on the occupant's back by coupling it with the seat model;

[0037] Step 4: Obtain cabin ambient temperature, air humidity, relative humidity, air velocity, and solar radiation through the cabin environment detector, input them into the thermal comfort calculation module, and calculate the human PMV-PPD index by combining human characteristic information.

[0038] Step 5: The thermal comfort calculation module calculates the air velocity vector distribution on the air convection side of the human body and the temperature distribution gradient on the air convection side based on the cabin environment and the human body model.

[0039] Step 6: The convection-side collaborative calculation module calculates the collaborative angle between the air velocity vector on the air convection side and the human body temperature distribution gradient using the following formula, where β is the air convection-side collaborative angle. and These represent the air velocity vector on the air convection side and the gradient of human body temperature distribution, respectively. and These are the air velocity scalar and the temperature distribution gradient scalar on the air convection side, respectively.

[0040]

[0041] Step 7: If the current human body PMV-PPD index is ≥1, the cabin air conditioning system is in cold air mode. At the same time, the air convection side coordination angle β is judged. If β ≥ 10°, the air conditioning outlet air direction is adjusted to be perpendicular to the human body air convection side and the wind speed is increased. If β ≤ 10°, the cabin air conditioning system temperature is reduced.

[0042] Step 8: If the current human body PMV-PPD index is ≤-1, the cabin air conditioning system is set to warm air mode. At the same time, the air convection side coordination angle β is judged. If β≥10°, the air conditioning outlet air direction is adjusted to be perpendicular to the human body air convection side and the air speed is increased. If β≤10°, the cabin air conditioning system temperature is increased.

[0043] Step 9: If the current human PMV-PPD index is between (-1, 1), then turn off the cabin air conditioning system.

[0044] Step 10: The seat-side collaborative calculation module calculates the synergy between the seat-side liquid flow velocity vector and the human body pressure distribution gradient and the human body temperature distribution gradient using the following formula, where w represents the seat-side synergy, u, These represent the fluid velocity vector on the seat side, the human body pressure distribution gradient, and the human body temperature distribution gradient, respectively.

[0045]

[0046] Step 11: If the seat surface temperature is higher than the body's suitable temperature, the seat temperature control system is in cooling mode. At the same time, the seat side synergy w is judged. If w ≥ 0.5, according to the human body pressure gradient distribution, the current of the distributed magnetorheological fluid device in the area with higher pressure is increased to reduce the damping force, and the current of the distributed magnetorheological fluid device in the area with lower pressure is reduced to increase the damping force, thereby making the human body pressure gradient distribution more uniform. At the same time, the circulating water pump is controlled to increase the liquid flow rate in the embedded heat exchange water plate. If w ≤ 0.5, the liquid temperature in the embedded heat exchange water plate is reduced.

[0047] Step 12: If the seat surface temperature is lower than the body's suitable temperature, the seat temperature control system is in heating mode. At the same time, the seat side coordination w is judged. If w ≥ 0.5, according to the human body pressure gradient distribution, the current of the distributed magnetorheological fluid device in the area with higher pressure is increased to reduce the damping force, and the current of the distributed magnetorheological fluid device in the area with lower pressure is reduced to increase the damping force, thereby making the human body pressure gradient distribution more uniform. At the same time, the circulating water pump is controlled to increase the liquid flow rate in the embedded heat exchange water plate. If w ≤ 0.5, the liquid temperature in the embedded heat exchange water plate is increased.

[0048] Step 13: If the seat surface temperature is equal to the body's suitable temperature, then based on the body's pressure gradient distribution, increase the current of the distributed magnetorheological fluid device in the area with higher pressure to reduce the damping force, and decrease the current of the distributed magnetorheological fluid device in the area with lower pressure to increase the damping force, thereby making the body's pressure gradient distribution more uniform.

[0049] The above embodiments are merely illustrative of the present invention and are not intended to limit the invention. Those skilled in the art can make modifications to these embodiments without contributing any inventive step after reading this specification, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present invention.

Claims

1. A control method for an occupant comfort adjustment system, comprising a comfort cloud computing platform, a cabin air conditioning system, a cabin environment detector, a seat surface temperature detector, a flow rate detector, an occupant feature recognition device, and a seat temperature control system. The comfort cloud computing platform includes a human comfort database, a human model library, a pressure comfort calculation module, a thermal comfort calculation module, a convection-side collaborative calculation module, and a seat-side collaborative calculation module. The seat temperature control system includes a circulating water pump, an embedded heat exchange water plate, and a distributed magnetorheological fluid device. The method is characterized in that... Includes the following steps: Step 1: Using the occupant feature recognition device, occupant features are identified to obtain occupant feature information and three-dimensional point cloud of the body surface; Step 2: Input the occupant's 3D point cloud into the human body model library, and use the nearest neighbor algorithm to query the distance error between the 3D point cloud and the model surface, thereby finding the human body model with the highest matching degree to the 3D point cloud. Step 3: Input the retrieved human body model into the pressure comfort calculation module, and calculate the pressure vector distribution on the occupant's back by coupling it with the seat model; Step 4: Obtain cabin ambient temperature, air humidity, relative humidity, air velocity, and solar radiation through the cabin environment detector, input them into the thermal comfort calculation module, and calculate the human PMV-PPD index by combining human characteristic information. Step 5: The thermal comfort calculation module calculates the air velocity vector distribution on the air convection side of the human body and the temperature distribution gradient on the air convection side based on the cabin environment and the human body model. Step 6, the convection-side collaborative calculation module calculates the collaborative angle between the air velocity vector on the air convection side and the human body temperature distribution gradient using the following formula, where, The coordinated angle on the air convection side, and These represent the air velocity vector on the air convection side and the gradient of human body temperature distribution, respectively. and These are the air velocity scalar and the temperature distribution gradient scalar on the air convection side, respectively. Step 7: If the current human PMV-PPD index is ≥1, the cabin air conditioning system is in cold air mode, and the coordinated angle of air convection is adjusted. Make a judgment, if If the angle is ≥10°, adjust the air conditioner outlet airflow direction towards the side perpendicular to the human body's air convection, and increase the airflow speed. If the temperature is ≤10°C, the cabin air conditioning system temperature will be lowered. Step 8: If the current human PMV-PPD index is ≤-1, the cabin air conditioning system is set to heating mode, and the coordinated angle of air convection is adjusted. Make a judgment, if If the angle is ≥10°, adjust the air conditioner outlet airflow direction towards the side perpendicular to the human body's air convection, and increase the airflow speed. If the temperature is ≤10°C, then the cabin air conditioning system temperature should be increased. Step 9: If the current human PMV-PPD index is between (-1, 1), then shut down the cabin air conditioning system; Step 10: The seat-side collaborative calculation module calculates the synergy between the seat-side liquid flow velocity vector and the human body pressure distribution gradient and the human body temperature distribution gradient using the following formula: Indicates seat-side synergy. , , These represent the fluid velocity vector on the seat side, the human body pressure distribution gradient, and the human body temperature distribution gradient, respectively. Step 11: If the seat surface temperature is higher than the body's comfortable temperature, the seat temperature control system switches to cooling mode and simultaneously adjusts the seat side temperature control. Make a judgment, if If the pressure gradient is ≥0.5, then based on the human body pressure gradient distribution, the current of the distributed magnetorheological fluid device in the area of ​​higher pressure is increased, thus reducing the damping force; the current of the distributed magnetorheological fluid device in the area of ​​lower pressure is decreased, thus increasing the damping force. This makes the human body pressure gradient distribution more uniform. Simultaneously, the circulating water pump is controlled to increase the liquid flow rate in the embedded heat exchange water plate. If the temperature is ≤0.5, then the liquid temperature in the embedded heat exchange water plate will be reduced. Step 12: If the seat surface temperature is lower than the body's comfortable temperature, the seat temperature control system will switch to heating mode, and simultaneously adjust the seat side temperature. Make a judgment, if If the pressure gradient is ≥0.5, then based on the human body pressure gradient distribution, the current of the distributed magnetorheological fluid device in the area of ​​higher pressure is increased, thus reducing the damping force; the current of the distributed magnetorheological fluid device in the area of ​​lower pressure is decreased, thus increasing the damping force. This makes the human body pressure gradient distribution more uniform. Simultaneously, the circulating water pump is controlled to increase the liquid flow rate in the embedded heat exchange water plate. If the temperature is ≤0.5, then the liquid temperature in the embedded heat exchange water plate will be increased; Step 13: If the seat surface temperature is equal to the body's suitable temperature, then based on the body's pressure gradient distribution, increase the current of the distributed magnetorheological fluid device in the area with higher pressure to reduce the damping force, and decrease the current of the distributed magnetorheological fluid device in the area with lower pressure to increase the damping force, thereby making the body's pressure gradient distribution more uniform.

2. The control method for an occupant comfort adjustment system according to claim 1, characterized in that: The embedded heat exchange water plate is "S" shaped, made of flexible hose, and embedded in the sponge layer of the seat. The distributed magnetorheological fluid device is located between the seat suspension and the sponge layer and can adjust the damping strength according to the current magnitude.

3. The control method for an occupant comfort adjustment system according to claim 1, characterized in that: In step 1, the occupant characteristic information includes age, gender, body composition, metabolic rate, and clothing.

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