Local heating device and control method for automotive air conditioning thermal comfort test dummy

Abstract

This invention discloses a local heating device and control method for a dummy used in automotive air conditioning thermal comfort testing. The device includes a dummy body with arrayed first and second heating modules on its back, buttocks, and thighs. Each module consists of a heat-insulating seat, a layered copper heat-conducting core, an exposed heat flow sensor, a built-in temperature sensor, and ceramic heating elements. An elastic push rod inside the dummy ensures close contact between the module and the seat. The heating elements and sensor array are connected to a PID control module and communicate with a host computer. The control method simulates a real-world scenario of preheating before contact, maintaining constant temperature heating in winter and adaptively switching between passive monitoring and constant power modes in summer. It supports differentiated target temperature allocation and contact pressure compensation. This invention can realistically simulate heat exchange between the human body and the seat under all operating conditions, without thermal plume interference, significantly improving the accuracy of cabin thermal comfort assessment.

Description

Technical Field

[0001] This invention relates to the field of automotive cabin thermal comfort testing technology, specifically to a local heating device and control method for an automotive air conditioning thermal comfort testing dummy. Background Technology

[0002] With the rapid development of vehicle electrification and intelligence, cabin thermal comfort has become one of the key indicators for consumers when choosing a vehicle, and it is also a key area for automakers to develop intelligent cabin systems. Air conditioning dummies, as crucial testing equipment for simulating human thermal response and evaluating cabin air conditioning thermal comfort performance, have been widely used in the automotive industry. Existing air conditioning dummies primarily use temperature, humidity, wind speed, and radiation sensors placed on their surface to collect environmental data, combined with thermal comfort models to predict human thermal sensations.

[0003] However, existing air conditioning dummies have the following significant drawbacks: Lack of simulation of heat exchange at contact surfaces: Existing air-conditioned mannequins do not have their own heating function and cannot simulate the heat exchange between the mannequin and the seat back and cushion during the human body's metabolic heat production process. Under low-temperature conditions in winter, the temperature of the back, buttocks, thighs, and other parts of the mannequin in contact with the seat is much lower than the actual skin temperature of a real person, resulting in distorted temperature data.

[0004] Heating methods interfere with the test environment: If a large-area overall heating scheme is adopted, similar to that used for warm-body dummies, it will produce a significant thermal plume effect, interfering with the accuracy of parameters such as ambient temperature and radiation temperature, and seriously affecting the reliability of test results.

[0005] The preheating logic does not conform to the real scenario: If the method of "contacting the seat first and then heating" is adopted by the warm body dummy, it is completely inconsistent with the actual process of a real person reaching a steady skin temperature before sitting down. It cannot simulate the initial heat exchange stage when the human body's steady skin temperature comes into contact with a cold seat, resulting in serious distortion of the heat flow data in the initial contact stage. The effect of contact pressure on the heat transfer coefficient was not considered, resulting in a significant deviation between the simulated heat distribution and the actual human body.

[0006] To address the shortcomings of the existing technology, a local heating structure and its control method that can be installed on existing air-conditioned dummies are needed to meet the testing requirements. Summary of the Invention

[0007] This invention provides a local heating device and control method for a test dummy for automotive air conditioning thermal comfort, which can solve the problems of lack of heat exchange simulation on the contact surface of existing air conditioning dummy and interference with the test environment caused by traditional large-area heating.

[0008] To achieve the above objectives, in a first aspect, the present invention provides the following technical solution: a local heating device for a dummy used in testing the thermal comfort of an automotive air conditioning system, comprising a dummy body, wherein multiple first heating modules are arranged on the back of the dummy body, and multiple second heating modules are arranged on the buttocks and / or thighs of the dummy body. Each of the first and second heating modules includes a heat insulation seat. A mounting groove is provided on one side of the heat insulation seat, and a heating element is installed at the bottom of the mounting groove. A heat-conducting core, which presses down on the heating element, is embedded in the mounting groove. An exposed heat flow sensor is installed on the top of the heat-conducting core, and a temperature sensor is installed inside the heat-conducting core. The heat flow sensor and the temperature sensor form a sensor group. The heating element and... All sensor groups are communicatively connected to a PID control module, which in turn is connected to a host computer. The first and second heating modules are small in size, enabling precise local heating and avoiding heat plumes generated by large-area heating, thus significantly reducing interference to surrounding environmental measurement points. The heat insulation base reduces heat transfer into the dummy, improving the accuracy of heat flow measurement. The heat-conducting core not only ensures the strength of the heating device but also guarantees uniform heat distribution, ensuring the representativeness of the sensor data. The built-in temperature sensor avoids the influence of surface temperature fluctuations. The exposed heat flow sensor directly measures contact heat flow without intermediate thermal resistance, resulting in high detection accuracy. The PID control module and the host computer facilitate centralized control of the numerous first and second heating modules, improving control precision.

[0009] Preferably, the dummy body has an elastic push rod installed inside, which is connected to the first heating module. The elastic push rod pushes the first heating module to the outside to contact the car seat. The elastic push rod can provide a continuous and stable pushing force to ensure that the first heating module and the seat are always in close contact, thus reducing measurement errors caused by poor contact.

[0010] Preferably, the bottom of the heat insulation seat of the first heating module is provided with a positioning groove, and one end of the elastic push rod is embedded in the positioning groove. The positioning groove ensures that the elastic push rod is arranged coaxially with the first heating module, avoiding the heating module from tilting due to eccentric thrust.

[0011] Preferably, the heat-conducting core includes an upper core and a lower core, and the temperature sensor is disposed between the upper core and the lower core. The layered core structure facilitates the installation and replacement of the temperature sensor and can accurately measure the average temperature inside the core.

[0012] Preferably, the heating element is a ceramic heating film that is laid flat at the bottom of the mounting groove and in full contact with the lower core. The ceramic heating film has uniform heating, high thermal efficiency, and fast response speed, making it suitable for high-precision power adjustment. In addition, it has a large flat contact area, low contact thermal resistance, and uniform heat transfer.

[0013] In a second aspect, the present invention also provides a control method for a local heating device for an automotive air conditioning thermal comfort test dummy as described in the first aspect, comprising the following steps: S1, the PID control module self-checks the working status of all sensor groups and heating elements. Before testing, the host computer assigns differentiated initial parameters to the heating modules of different parts based on the selected human body model, i.e., the target temperature T of different heating modules. set Load the test configuration file and send the target temperature T to each of the first and second heating modules. set The sensor groups of each heating module synchronously collect the internal temperature T of the heating module at a preset frequency. module The first and second heating modules preheat in a constant temperature mode, and the heating modules preheat according to the target temperature T. set and the current internal temperature T of the heating module module The temperature is adjusted by the PID control module until it stabilizes at T. set After the temperature is preheated to the set constant temperature, it is placed tightly against the outer surface of the seat to collect the heat flow time-series change value. S2. When testing in winter, the first heating module and the second heating module maintain a constant temperature heating mode. In hot summer weather, or when the temperature sensor on the dummy near the heating module detects that the seat contact temperature is higher than the target temperature T. set When the condition is determined to be reverse heat exchange, since the heating module does not have active heat dissipation function, it cannot maintain a constant temperature mode below the contact temperature. At this time, it switches to one or a combination of the following operating modes: S2.1 Passive monitoring mode: The heating element is not working. The temperature sensor and the sensor group of the heating module built into the dummy body collect the temperature change curve Tt and the heat flow value change curve qt of the contact surface between the module and the seat at a preset frequency. S2.2, Constant Power Mode: Maintains a preset constant power P. const The heating element is driven to work, and an active heat source is superimposed on the passive temperature rise to simulate the combined heat exchange condition of human metabolic heat production and high temperature seat. The temperature rise characteristic curve and heat flow change characteristic curve under constant power conditions are recorded. S3. Data Synchronization Upload: After all the data collected and the operating status data of the heating modules are stamped with a unified timestamp, they are synchronously uploaded to the host computer via the CAN bus for storage and analysis.

[0014] Preferably, in step S1, the host computer has a built-in database of metabolic rates for different genders, ages, and body types, and assigns differentiated target set temperatures T to each of the first and second heating modules based on the selected human model and the placement of the heating modules. set .

[0015] Preferably, step S2 further includes a contact pressure compensation step: the contact pressure P between the human body and the seat is collected by a pressure sensor integrated on the heating module heat insulation seat, and the pressure is calculated according to the formula P... 修正 =P 初始 ×(1+k×(P-P0)) Corrects the output power of the heating element, where k is the preset pressure compensation coefficient and P0 is the standard contact pressure.

[0016] Compared with the prior art, the technical solution of the present invention can achieve the following technical effects: By installing heating modules on the back, buttocks, and legs of the dummy, localized and precise heating is achieved, completely avoiding the heat plume effect caused by traditional large-area overall heating. This significantly reduces interference with ambient temperature, wind speed, and radiation temperature measurement points, ensuring the authenticity of the testing environment. Each module is independently controlled, which can accurately simulate the differences in heat distribution in different parts of the human body, such as the back, buttocks, and thighs, solving the problem of heat distribution distortion caused by single-area heating.

[0017] The heat-conducting core of the heating module not only ensures the strength of the heating device but also ensures uniform heat distribution and representativeness of the data collected by the sensor; the built-in temperature sensor avoids the influence of surface temperature fluctuations; the exposed heat flow sensor directly measures the contact heat flow without intermediate thermal resistance, resulting in high detection accuracy. The first heating module in the back is connected to a flexible push rod, which can provide a continuous and stable thrust to ensure that the first heating module is always in close contact with the seat, thus reducing measurement errors caused by poor contact. The host computer has a built-in database of metabolic rates for different genders, ages, and body types. Before testing, it assigns differentiated initial parameters to the heating modules of different parts based on the selected human model. It supports testing of various human models such as adult men, adult women, and children, and has a wide range of applications, which can meet the thermal comfort testing needs of different user groups. The control method adopts a preheating-then-contact step to simulate the real scenario where a person reaches a steady-state skin temperature before sitting down. The accuracy of heat flow data in the initial contact stage is improved, which solves the problem of initial heat transfer distortion caused by the "contact-then-heat" method in the existing technology. In winter, the constant temperature mode continuously maintains the steady skin temperature of various parts of the human body, ensuring the stability and accuracy of the forward heat exchange process. In summer, a dual-mode switching is adopted. The passive monitoring mode accurately measures the pure reverse heat flow, while the constant power mode simulates the combined heat exchange of human metabolism and high-temperature seats, filling the gap in existing technology that cannot simulate high-temperature combined working conditions. Attached Figure Description

[0018] Figure 1 This is a layout diagram of the heating module on the air conditioning dummy of the present invention; Figure 2This is a control block diagram of the heating module of the present invention; Figure 3 This is a cross-sectional view of the heating module of the present invention; Figure 4 This is a diagram showing the interaction between the elastic push rod and the heating module of the present invention. Figure 5 This is a flowchart of the control method of the present invention.

[0019] Figure label: 1. Dummy body; 2. First heating module; 3. Second heating module; 10. Back; 11. Upper core; 12. Lower core; 13. Heat insulation seat; 14. Heat flow sensor; 15. Temperature sensor; 16. Mounting slot; 17. Heating element; 18. Positioning groove; 20. Hips; 30. Thighs; 40. Elastic push rod. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0021] like Figure 1-5As shown, to address the problems of insufficient heat exchange simulation of the contact surface of existing air conditioning dummy tests, single heating method that interferes with the test environment, and insufficient control precision, this invention provides the following technical solution: A local heating device for a car air conditioning thermal comfort test dummy, comprising a dummy body 1, with multiple first heating modules 2 arranged on the back 10 of the dummy body 1, and multiple second heating modules 3 arranged on the buttocks 20 and / or thighs 30 of the dummy body 1. Each of the first heating modules 2 and second heating modules 3 includes a heat insulation seat 13. A mounting groove 16 is provided on one side of the heat insulation seat 13. A heating element 17 is installed at the bottom of the mounting groove 16. A heat-conducting core is embedded in the mounting groove 16 to press the heating element 17. An exposed heat flow sensor 14 is installed on the top of the heat-conducting core, and a temperature sensor 15 is installed inside the heat-conducting core. A sensor group consisting of a flow sensor 14 and a temperature sensor 15 is formed. Both the heating element 17 and the sensor group are communicatively connected to a PID control module, which in turn is communicatively connected to a host computer. The first heating module 2 and the second heating module 3 are small in size, enabling precise local heating and avoiding heat plumes generated by large-area heating, thus significantly reducing interference to the surrounding environmental measurement points. The heat insulation seat 13 can reduce heat transfer into the dummy, improving the accuracy of heat flow measurement. The heat-conducting core not only ensures the strength of the heating device but also ensures uniform heat distribution, guaranteeing the representativeness of the sensor data. The built-in temperature sensor 15 avoids the influence of surface temperature fluctuations. The exposed heat flow sensor 14 directly measures the contact heat flow without intermediate thermal resistance, resulting in high detection accuracy. The PID control module and the host computer facilitate centralized control of the numerous first heating modules 2 and second heating modules 3, improving control accuracy.

[0022] Specifically, the dummy body 1 is made of polyurethane foam material with a 1:1 scale to that of an adult male, ensuring that the contact posture and contact area with the seat are consistent with those of a real person. The back 10 of the dummy body 1 is equipped with a 4×2 or 2×2 array of first heating modules 2, the buttocks 20 are equipped with a 3×2 array of 6 second heating modules 3, and the left and right thighs 30 are each equipped with a 1×2 array of 2 second heating modules 3. The exposed surfaces of all heating modules are flush with the surface of the dummy body 1.

[0023] The heat insulation base 13 is made of ABS engineering plastic, with an outer diameter of 25mm and a total height of 40mm. A cylindrical mounting groove 16 with a depth of 25mm is opened on the side facing the outside of the dummy. The heating element 17 is a circular ceramic heating film with a diameter of 9mm, a thickness of 0.5mm, a rated voltage of 12V, and a maximum power of 10W. It is flatly attached to the bottom of the mounting groove 16 with thermally conductive adhesive.

[0024] The heat-conducting core is made of copper and consists of an upper core 11 and a lower core 12, both with an outer diameter of 17mm. The upper core 11 is 8mm high, with a semi-circular groove of 2mm diameter and 1mm depth at the center of its lower surface. The lower core 12 is 7mm high, with a corresponding semi-circular groove at the center of its upper surface. A 2mm diameter PT100 platinum resistance temperature sensor 15 is placed between the grooves of the upper and lower cores. The upper and lower cores are bonded together with thermally conductive adhesive to ensure a tight fit between the temperature sensor 15 and the core. The upper core 11 has a 15mm diameter and 1mm depth groove on its upper surface. A thin-film heat flow sensor 14 is attached to this groove, with its exposed surface flush with the top of the upper core 11. The entire heat-conducting core is embedded in the mounting groove 16, with the lower surface of the lower core 12 in full contact with the upper surface of the ceramic heating film, pressing the ceramic heating film firmly.

[0025] A longitudinal wire guide groove is provided on the side of the heat insulation base 13. The signal lines of the heat flow sensor 14 and the temperature sensor 15, as well as the power supply line of the ceramic heating film, are embedded in the wire guide groove and guided to the interior of the dummy body 1. A PID control module is installed inside the dummy body 1. All sensors and heating elements of the heating modules are electrically connected to the PID control module. The PID control module communicates with a host computer via a CAN bus. The host computer can be an industrial panel PC with dedicated testing software installed, enabling parameter configuration, real-time monitoring, data storage, and analysis.

[0026] In this embodiment, an elastic push rod 40 connected to the first heating module 2 is installed inside the dummy body 1. The elastic push rod 40 pushes the first heating module 2 to the outside to contact the car seat. The elastic push rod 40 can provide a continuous and stable thrust, ensuring that the first heating module 2 and the seat are always in close contact, reducing measurement errors caused by poor contact. Specifically, the elastic push rod 40 is a stainless steel spring push rod with a stroke of 10mm and a preload of 5N. One end is fixed to a support plate inside the dummy body 1, and the other end is embedded in a positioning groove 18 with a diameter of 12mm and a depth of 15mm opened at the center of the bottom of the heat insulation seat 13. The positioning groove 18 ensures that the elastic push rod and the first heating module 2 are arranged coaxially, avoiding the heating module from tilting due to eccentric thrust. When the dummy sits on the seat, the elastic push rod 40 is compressed, and the resulting elastic thrust makes the surface of the heat flow sensor 14 of the first heating module 2 fit tightly against the seat back, with the contact pressure maintained in the range of 8~12kPa.

[0027] As a specific control method in this embodiment, it includes the following steps: Step S1: System Initialization and Warm-up Before testing, the dummy body 1 was placed on a support platform next to the car seat, separating the heating module from the seat surface. The host computer started the dedicated testing software, loaded the test configuration file, selected the adult male resting human model, and set the sampling frequency to 1Hz.

[0028] After the PID control module is powered on, it executes a self-test program, sequentially checking the open / short circuit status of all temperature sensors 15 and heat flow sensors 14, as well as the on / off status and insulation performance of the ceramic heating film. If a fault is detected, the corresponding fault code is immediately sent to the host computer, which then issues an audible and visual warning. If the self-test passes, the host computer extracts corresponding parameters from the built-in human body zone metabolic rate database based on the selected human body model and the placement of the heating modules, and assigns differentiated target temperatures T to each heating module. set The first heating module 2 on the back of the T set =34℃, the second heating module 3 of the buttocks T set =34.5℃, the T of the second heating module 3 on the thigh. set =33.5℃.

[0029] The host computer sends the initial parameters to each heating module, and all heating modules start preheating in constant temperature mode. The PID control module adjusts the temperature based on the internal temperature T collected by the built-in temperature sensor 15 of each heating module. module The output power of the ceramic heating film is adjusted using a PID algorithm until the internal temperature of all heating modules stabilizes at their respective target temperatures T. set In this embodiment, the preheating time is approximately 2 minutes. After preheating, the dummy body 1 is quickly moved onto the car seat and adjusted to a standard test sitting posture, such as a backrest angle of 110° and a horizontal seat cushion, so that the heating module is in close contact with the outer surface of the seat, and the heat flow sensor 14 begins to collect the heat flow time sequence change value during the initial contact phase.

[0030] Step S2: Operating Condition Judgment and Mode Switching The system collects real-time temperature sensor data from the dummy body 1 to determine the current heat exchange condition. Winter low-temperature conditions: When the seat contact temperature is ≤35℃, it is determined to be a positive heat exchange condition, and all heating modules maintain constant temperature heating mode. Simultaneously, a miniature pressure sensor integrated on the heat-insulating seat 13 collects the contact pressure P between each heating module and the seat in real time, and the PID adjustment module adjusts the pressure according to formula P. 修正 =P 初始 ×(1+k×(P-P0)) Corrects the output power of heating element 17, where k=0.03kPa -1(After experimental calibration), P0 = 10 kPa (standard contact pressure). In this embodiment, when the dummy's posture adjustment causes the back contact pressure to increase from 10 kPa to 15 kPa, the corrected heating power is 1.15 times the initial power, compensating for the increase in heat transfer coefficient caused by the increase in contact pressure.

[0031] Summer high-temperature conditions: When the seat contact temperature > 35℃, which is higher than the target temperature of all heating modules, it is determined to be a reverse heat exchange condition. Since the heating modules do not have active heat dissipation function, they cannot maintain a constant temperature below the contact temperature. The system will switch to any one or a combination of the following modes according to the test requirements: Passive monitoring mode: The power supply to all heating elements 17 is cut off. The temperature sensor and the sensor group of the heating module on the dummy body 1 synchronously collect the temperature change curve Tt and the heat flow value change curve qt of the contact surface between the module and the seat at a frequency of 1Hz, and accurately measure the reverse heat transfer process from the seat to the dummy.

[0032] Constant power mode: The heating element 17 is driven to work with a preset constant power. In this embodiment, the P of the first heating module 2 on the back is... const =2W, P of the second heating module 3 for the buttocks const =3W, P of the second heating module 3 in the thigh area const =1.5W, with an active heat source superimposed on passive temperature rise, to simulate the combined heat exchange condition of continuous human metabolic heat production and high-temperature seat, and record the temperature rise characteristic curve and heat flow change characteristic curve under constant power conditions.

[0033] Step S3: Data Synchronization and Upload All data collected from the heating modules (including temperature, heat flux, and pressure) and operational status data (including operating mode, heating power, and fault codes) are tagged with a unified system timestamp and synchronously uploaded to the host computer via the CAN bus at a frequency of 1Hz. The host computer displays the parameter curves of each heating module in real time and stores the data in CSV format files, facilitating subsequent fusion analysis and thermal comfort prediction with data from other sensors on the air conditioning dummy (wind speed, radiant temperature, and humidity).

[0034] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0035] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly and specifically defined.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

Claims

1. A local heating device for a dummy used in testing the thermal comfort of an automotive air conditioning system, comprising a dummy body (1), characterized in that, The back (10) of the dummy body (1) is provided with a plurality of first heating modules (2), and the buttocks (20) and / or thighs (30) of the dummy body (1) are provided with a plurality of second heating modules (3). The first heating module (2) and the second heating module (3) both include a heat insulation seat (13). A mounting groove (16) is provided on one side of the heat insulation seat (13). A heating element (17) is installed at the bottom of the mounting groove (16). A heat-conducting core is embedded in the mounting groove (16) to press the heating element (17). An exposed heat flow sensor (14) is installed on the top of the heat-conducting core. A temperature sensor (15) is installed inside the heat-conducting core. The heat flow sensor (14) and the temperature sensor (15) form a sensor group. The heating element (17) and the sensor group are both connected to a PID adjustment module. The PID adjustment module is connected to a host computer.

2. The local heating device for the automotive air conditioning thermal comfort test dummy according to claim 1, characterized in that: The dummy body (1) is equipped with an elastic push rod (40) connected to the first heating module (2). The elastic push rod (40) pushes the first heating module (2) to the outside to contact the car seat.

3. The local heating device for the automotive air conditioning thermal comfort test dummy according to claim 2, characterized in that: The bottom of the heat insulation seat (13) of the first heating module (2) is provided with a positioning groove (18), and one end of the elastic push rod (40) is embedded in the positioning groove (18).

4. The local heating device for the automotive air conditioning thermal comfort test dummy according to claim 2, characterized in that: The heat-conducting core includes an upper core (11) and a lower core (12), and the temperature sensor (15) is disposed between the upper core (11) and the lower core (12).

5. The local heating device for the automotive air conditioning thermal comfort test dummy according to claim 3, characterized in that: The heating element (17) is a ceramic heating film that is laid flat at the bottom of the mounting groove (16) and in full contact with the lower core (12).

6. A control method for a local heating device on a car air conditioning thermal comfort test dummy as described in any one of claims 1 to 5, characterized in that, Includes the following steps: S1, the PID control module self-checks the working status of all sensor groups and heating elements (17). Before testing, the host computer assigns differentiated initial parameters to the heating modules of different parts according to the selected human body model, that is, the target temperature T of different heating modules. set The test configuration file is loaded and the target temperature T is sent to each of the first heating modules (2) and the second heating modules (3). set The sensor groups of each heating module synchronously collect the internal temperature T of the heating module at a preset frequency. module The first heating module (2) and the second heating module (3) preheat in a constant temperature mode, and the heating modules preheat according to the target temperature T. set and the current internal temperature T of the heating module module The temperature is adjusted by the PID control module until it stabilizes at T. set After the temperature is preheated to the set constant temperature, it is placed tightly against the outer surface of the seat to collect the heat flow time-series change value. S2. When testing in winter, the first heating module (2) and the second heating module (3) maintain a constant temperature heating mode; In hot summers, or when the temperature sensor on the dummy body (1) near the heating module detects that the seat contact temperature is greater than the target temperature T, set When the condition is determined to be reverse heat exchange, since the heating module does not have active heat dissipation function, it cannot maintain a constant temperature mode below the contact temperature. At this time, it switches to one or a combination of the following operating modes: S2.1 Passive monitoring mode: The heating element (17) does not work, and the temperature sensor and the sensor group of the heating module on the dummy body (1) collect the temperature change curve Tt and the heat flow value change curve qt of the contact surface between the module and the seat at a preset frequency. S2.2, Constant Power Mode: Maintains a preset constant power P. const Drive the heating element (17) to work, and superimpose an active heat source on the basis of passive temperature rise to simulate the combined heat exchange condition of human metabolism heat production and high temperature seat, and record the temperature rise characteristic curve and heat flow change characteristic curve under constant power conditions. S3. Data Synchronization Upload: After all the data collected and the operating status data of the heating modules are stamped with a unified timestamp, they are synchronously uploaded to the host computer via the CAN bus for storage and analysis.

7. The control method for the local heating device of the automotive air conditioning thermal comfort test dummy according to claim 6, characterized in that: In step S1, the host computer has a built-in database of metabolic rates for different genders, ages, and body types. Based on the selected human model and the placement of the heating modules, it assigns differentiated target set temperatures T to each of the first heating modules (2) and second heating modules (3). set .

8. The control method for the local heating device of the automotive air conditioning thermal comfort test dummy according to claim 6, characterized in that: Step S2 also includes a contact pressure compensation step: the contact pressure P between the human body and the seat is collected by a pressure sensor integrated on the heating module heat insulation seat (13), and the pressure is calculated according to the formula P 修正 =P 初始 ×(1+k×(P-P0))corrects the output power of the heating element (17), where k is the preset pressure compensation coefficient and P0 is the standard contact pressure.

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