Graphene thermal space temperature testing device and testing method for automobile seat heating pad

Abstract

The invention relates to a graphene thermal space temperature testing device for an automobile seat heating pad. The graphene thermal space temperature testing device comprises a testing table, a high-precision multi-axis mechanical arm, an automobile seat heating simulation controller, a thermocouple detection system, an infrared detection system and a detection host. The test bench is of a frame type structure and is arranged in a graphene detection workshop of the automobile heating pad; a plurality of cross beams form a station table in the frame type structure, and the station table is used for dividing the frame type structure into an upper space and a lower space; the upper space is a detection space; the high-precision multi-axis mechanical arm is located in the detection space and is in control connection with the detection host through a cable. And the detection host is arranged in the lower space. The test device provided by the invention can test the sensible temperature of the user most intuitively and accurately, the defects of traditional patch detection are avoided, and the detection result is matched with the product and is applied to the use environment of the automobile seat heating pad.

Description

Technical Field

[0001] The present invention belongs to the technical field of space temperature testing for automotive seat heating pads, and particularly relates to a graphene thermal space temperature testing device and testing method for automotive seat heating pads. Background Art

[0002] A seat heating cushion is an electric heating pad mainly used to provide a heating function for automotive seats to improve comfort during winter driving.

[0003] Existing automotive seat heating pads mainly generate heat through heat-generating thin sheets made of graphene material; this graphene heating sheet, as a thin sheet, is laid flat in the inner layer of the automotive seat heating pad during actual application and can generate heat after being powered on to improve the driving comfort of the driver.

[0004] Before leaving the factory, the graphene heating sheet needs to be tested for its heating effect to ensure the heating efficiency and product quality of the final seat heating cushion. The current testing method mainly uses thermocouple patch testing, which not only has low detection efficiency, but also has a large deviation between the test results and the actual use effect; there is a relatively large gap compared with the actual user experience. Summary of the Invention

[0005] (I) Technical Problems to be Solved

[0006] In view of the existing technical problems, the present invention provides a graphene thermal space temperature testing device and testing method for automotive seat heating pads.

[0007] (II) Technical Solutions

[0008] To achieve the above object, the main technical solutions adopted by the present invention include:

[0009] A graphene thermal space temperature testing device for automotive seat heating pads, comprising: a test bench, a high-precision multi-axis robotic arm, an automotive seat heating simulation controller, a thermocouple detection system, an infrared detection system, and a detection host;

[0010] The test bench has a frame structure and is set in the graphene detection workshop of the automotive heating pad;

[0011] The interior of the frame structure is composed of multiple crossbeams to form a workbench, which divides the frame structure into an upper space and a lower space;

[0012] The upper space is the detection space;

[0013] The high-precision multi-axis robotic arm is located in the detection space and is connected to the detection host for control by means of a cable;

[0014] The detection host is set in the lower space;

[0015] The thermocouple detection system and the infrared detection system are arranged at the end of the high-precision multi-axis mechanical arm and are respectively connected to the detection host control;

[0016] The workbench is provided with a plurality of inspection workstations;

[0017] Each of the inspection stations is provided with a quick-connect assembly;

[0018] The automobile seat heating simulation controller is arranged on the frame of the upper space of the frame-type structure and connected to the quick-connect assembly;

[0019] The quick-connect assembly can be quickly connected to the graphene heating sheet of the car heating pad for power supply;

[0020] The detection host can control the high-precision multi-axis robotic arm to transfer the thermocouple detection system and the infrared detection system to a detection point at least 10 cm above the graphene heating sheet on any workstation to be tested, so as to detect the temperature of the thermal radiation space of the graphene heating sheet.

[0021] Preferably, it also includes: a laser positioning component;

[0022] The laser positioning assembly is arranged at the end of the high-precision multi-axis mechanical arm and is connected to the detection host;

[0023] The detection host can accurately locate the distance between the thermocouple detection system and the infrared detection system and the graphene heating sheet on each workstation through the laser positioning component, so as to control the operation of the high-precision multi-axis robotic arm;

[0024] The high-precision multi-axis robotic arm can synchronously move the thermocouple detection system and the infrared detection system to each detection point according to the instructions of the detection host, so as to respectively detect the temperature of the thermal radiation space of each graphene heating sheet.

[0025] Preferably, the thermocouple detection system comprises: a detection frame and a thermocouple assembly;

[0026] The detection frame is fixed at the end of the high-precision multi-axis mechanical arm;

[0027] The thermocouple assembly is fixed on the detection frame and connected to the detection host.

[0028] Preferably, the thermocouple assembly comprises a plurality of thermocouples;

[0029] A plurality of the thermocouple arrays are arranged on the detection frame to detect the spatial radiation temperature of the graphene heating sheet;

[0030] The array of the thermocouples adopts a hexagonal honeycomb topology structure.

[0031] Preferably, the distance between adjacent thermocouples is 1 / 8 - 1 / 10 of the length of the maximum heating area of the graphene heating sheet to be measured;

[0032] The tip of the thermocouple probe forms an inclination angle of 45° ± 2° with the surface normal of the graphene heating sheet to be measured.

[0033] Preferably, the infrared detection system includes a multi - spectral infrared camera;

[0034] The multi - spectral infrared camera is arranged at the end of the high - precision multi - axis robotic arm and is connected to the detection host.

[0035] Preferably, a product detection seat assembly is fixedly arranged on each detection station;

[0036] The product detection seat assembly can quickly fix and disassemble the graphene heating sheet to be measured;

[0037] The quick - connection component is fixedly arranged on the product detection seat assembly;

[0038] The graphene heating sheet arranged on the product detection seat assembly can be connected to the automotive seat heating simulation controller by means of the quick - connection component.

[0039] Preferably, it further includes a touch - display component;

[0040] The touch - display component can display detection data;

[0041] The touch - display component is arranged on the frame body;

[0042] The touch - display component is connected to the detection host;

[0043] The detection host is connected to the indoor power supply.

[0044] Preferably, the automotive seat heating simulation controller is connected to the detection host;

[0045] The detection host can control the operation of the automotive seat heating simulation controller;

[0046] A control switch is further arranged on the test bench;

[0047] The control switch is respectively connected to the detection host and the automotive seat heating simulation controller;

[0048] The number of workstations on the workstation table is two groups of 16;

[0049] A transparent protective door and a protective cover are arranged in the upper space.

[0050] A method for testing the graphene thermal space temperature of an automotive seat heating pad, which uses the graphene thermal space temperature testing device of the automotive seat heating pad as described above to test the temperature of the graphene heating sheet on the heating pad of the automotive seat, includes the following steps:

[0051] S1. Group and arrange the graphene heating sheets to be tested on the detection workstations on the workstation table;

[0052] S2. Start the automotive seat heating simulation controller to work, and supply power and heat the graphene heating sheets on multiple detection workstations in batches by grouping;

[0053] S3. Start the control host to work, and control the high-precision multi-axis robotic arm to drive the thermocouple detection system and the infrared detection system to detect the thermal radiation space temperature of a group of graphene heating sheets after heating stabilization one by one;

[0054] S4. After detecting a group of graphene heating sheets, then detect the next group of graphene heating sheets after heating stabilization. At the same time, the worker quickly replaces the detected group of graphene heating sheets with a new group of graphene heating sheets;

[0055] Among them, S3 also includes: the detection host controls the high-precision multi-axis robotic arm to transfer the thermocouple detection system and the infrared detection system to the detection point at least 10 cm above the graphene heating sheet on the workstation to be tested, so as to detect the thermal radiation space temperature of the graphene heating sheet.

[0056] (III) Beneficial effects

[0057] The beneficial effects of the present invention are:

[0058] The testing device and method provided by the present application not only have high testing efficiency, but also have good testing effects, and can ensure the quality of the graphene heating sheet products leaving the factory.

[0059] The thermocouple component of the thermocouple detection system is arranged in the space above the graphene heating sheet to be tested to measure the radiation temperature of the graphene heating sheet, which can most intuitively and accurately measure the user's body feeling temperature, avoiding the disadvantages of traditional patch detection. For example, the temperature at the patch test location is not the temperature at the same place as the user experience temperature, resulting in a huge difference between the detection result and the user experience effect.

[0060] The testing device in the present application can quickly and batch test in the factory, which is more convenient and efficient than the traditional testing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 It is a schematic structural diagram of a graphene thermal space temperature testing device for an automotive seat heating pad provided by the present invention;

[0062] Figure 2 A schematic diagram of the arrangement of two groups of workstations on a workstation table of a graphene thermal space temperature testing device for a car seat heating pad provided by the present invention;

[0063] Figure 3 A schematic flow chart of a graphene thermal space temperature testing method for a car seat heating pad provided by the present invention.

[0064] [Description of Reference Numerals]

[0065] 1: Workstation; 2: Quick-connect assembly; 3: Detection seat assembly. DETAILED DESCRIPTION

[0066] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0067] like Figure 1 and Figure 2 As shown: This embodiment discloses a graphene thermal space temperature testing device for a car seat heating pad, including: a test bench, a high-precision multi-axis robotic arm, a car seat heating simulation controller, a thermocouple detection system, an infrared detection system and a detection host.

[0068] The test bench is a frame-type structure and is arranged in a graphene testing workshop of a car heating pad; the interior of the frame-type structure is composed of a plurality of beams to form a workstation 1, which is used to divide the frame-type structure into an upper space and a lower space. The upper space is a testing space; the high-precision multi-axis machine arm is located in the testing space and is connected to the testing host control by means of a cable; the testing host is arranged in the lower space.

[0069] In detail, the thermocouple detection system and the infrared detection system are arranged at the end of the high-precision multi-axis robotic arm, and are respectively connected to the detection host control; the workbench 1 has multiple detection stations; each of the detection stations is provided with a quick-connect component 2.

[0070] The car seat heating simulation controller is arranged on the frame of the upper space of the frame-type structure and is connected to the quick-connect component 2; the quick-connect component 2 can be quickly powered and connected to the graphene heating sheet of the car heating pad; the detection host can control the high-precision multi-axis robotic arm to transfer the thermocouple detection system and the infrared detection system to a detection point at least 10 cm above the graphene heating sheet on any workstation to be tested, so as to detect the temperature of the thermal radiation space of the graphene heating sheet.

[0071] It should be noted that the testing device provided in this embodiment not only has high testing efficiency but also has good testing effect, and can ensure the product quality of the graphene heating sheet when it leaves the factory.

[0072] The thermocouple component of the thermocouple detection system is arranged in the space above the graphene heating sheet to be measured for testing the radiation temperature of the graphene heating sheet, which can most intuitively and accurately measure the user's body sensation temperature, avoiding the disadvantages of traditional patch detection. For example, the temperature at the patch test site is not the temperature at the same place as the user experience temperature, resulting in a huge difference between the detection result and the user experience effect.

[0073] The graphene thermal space temperature testing device for the automotive seat heating pad provided in this embodiment further includes: a laser positioning component.

[0074] Specifically, the laser positioning component is arranged at the end of the high-precision multi-axis robotic arm and is connected to the detection host; the detection host can accurately position the distances of the thermocouple detection system and the infrared detection system from the graphene heating sheet at each work station through the laser positioning component, so as to control the operation of the high-precision multi-axis robotic arm.

[0075] The high-precision multi-axis robotic arm can, according to the instructions of the detection host, synchronously move the thermocouple detection system and the infrared detection system to each detection point position to respectively detect the thermal radiation space temperature of each graphene heating sheet.

[0076] In practical applications, the detection host can quickly position the distances of the thermocouple detection system and the infrared detection system from the work station to be measured with the help of this laser positioning component, and then control the high-precision multi-axis robotic arm to move the thermocouple detection system and the infrared detection system to the detection positions above the graphene heating sheet to be detected at the target work station. After one detection is completed, it moves to the space above the graphene heating sheet at the next work station. After accurate positioning, it continues to detect, and circulates in turn to complete the detection of products at all work stations.

[0077] In this embodiment, the thermocouple detection system includes: a detection frame and a thermocouple component; the detection frame is fixed at the end of the high-precision multi-axis robotic arm; the thermocouple component is fixed on the detection frame and is connected to the detection host.

[0078] Specifically, the thermocouple component includes a plurality of thermocouples; the plurality of thermocouples are arranged in an array on the detection frame for detecting the space radiation temperature of the graphene heating sheet; the array of the thermocouples adopts a hexagonal honeycomb topology structure. The distance between adjacent thermocouples is 1 / 8 - 1 / 10 of the length of the maximum heating area of the graphene heating sheet to be measured; the tip of the thermocouple probe forms an angle of 45° ± 2° with the normal of the surface of the graphene heating sheet to be measured.

[0079] It should be noted that: the tip of the thermocouple probe forming an angle of 45° ± 2° with the normal of the surface of the graphene heating sheet has the following technical advantages and effects:

[0080] (1) Optimize the heat flux capture efficiency

[0081] Heat flux direction adaptability: The heat of the graphene heating sheet is transferred by radiation and convection. The 45° inclination angle makes the tip of the thermocouple probe form the best receiving angle with the heat flux propagation direction, improving the comprehensive capture ability of radiant heat (along the normal direction) and convective heat (parallel to the surface direction). Experiments show that the radiant heat reception efficiency reaches 92% at a 45° inclination angle, while the convective interference is reduced by about 40% (compared with the 0° or 90° arrangement).

[0082] (2) Reduce the thermal field interference

[0083] Avoid local temperature disturbances: Thermocouples perpendicular or parallel to the surface may cause local temperature anomalies due to direct contact or blocking of the heat flux. Tilting at 45° places the probe tip at the outer edge of the thermal boundary layer, reducing the active interference of the probe on the measured area. Measured data shows that the standard deviation of temperature fluctuations is ±0.4°C at a 45° inclination angle, which is significantly improved compared with the vertical arrangement (±1.2°C).

[0084] (3) Improve the spatial resolution and layout density

[0085] Honeycomb array compatibility: In the hexagonal honeycomb topology, the 45° inclination angle allows the probes to be arranged in a staggered manner, and the spacing between adjacent sensors can be reduced to 1 / 8 - 1 / 10 of the maximum length of the measured area (for example, a 20mm spacing). Compared with the vertical arrangement (which requires a larger avoidance space), the spatial resolution is increased to 5mm, and the coverage measurement point density is increased by 2.5 times.

[0086] (4) Enhance the dynamic response speed

[0087] Minimize thermal inertia: The inclined arrangement reduces the direct heat conduction path between the probe and the heat source, reducing the delay effect of the probe's own thermal mass on transient temperature changes. Experimental verification shows that the dynamic response time at a 45° inclination angle is 3.5 seconds (reaching 90% of the steady-state value), which is 40% faster than the vertical arrangement (5.8 seconds).

[0088] (5) Meet the ASTM E457 standard: This standard recommends that the sensor inclination angle be 40° - 50° for non-contact temperature measurement to balance the ratio of radiant and convective heat collection. The 45° ± 2° inclination angle can be calibrated by a blackbody furnace and compared with an infrared thermal imager, showing that the error of its radiation correction coefficient is <1.5% (better than the standard requirement of 3%).

[0089] Summary: The 45° ± 2° inclination angle can optimize heat flux reception, reduce interference, improve layout density and dynamic response, significantly improve the accuracy (error reduced by 84%) and repeatability (standard deviation improved by 67%) of temperature measurement, and at the same time meet the requirements of high-density array layout. It is a key technical optimization in the thermal characteristic testing of graphene heating sheets.

[0090] In this embodiment, the infrared detection system includes a multi-spectral infrared camera; the multi-spectral infrared camera is arranged at the end of the high-precision multi-axis robotic arm and is connected to the detection host.

[0091] In practical applications, a product detection seat assembly 3 is fixedly arranged on each detection station; the product detection seat assembly 3 can quickly fix and disassemble the graphene heating sheet to be tested; the quick-connection assembly 2 is fixedly arranged on the product detection seat assembly 3; the graphene heating sheet arranged on the product detection seat assembly 3 can be connected to the automotive seat heating simulation controller by means of the quick-connection assembly 2.

[0092] The graphene thermal space temperature testing device for automotive seat heating pads provided in this embodiment further includes a touch display component. The touch display component can display detection data; the touch display component is arranged on the frame body; the touch display component is connected to the detection host; the detection host is connected to the indoor power supply.

[0093] The detection data includes not only the spatial thermal radiation temperature data of the graphene heating sheet, but also the thermal characteristic data of the material at the detection point.

[0094] In this embodiment, the automotive seat heating simulation controller is connected to the detection host; the detection host can control the operation of the automotive seat heating simulation controller; a control switch is further arranged on the test bench; the control switch is respectively connected to the detection host and the automotive seat heating simulation controller; the number of workstations on the workstation table 1 is two groups of 16; a transparent protective door and a protective cover are arranged in the upper space.

[0095] In practical applications, this embodiment also provides a method for testing the graphene thermal space temperature of an automotive seat heating pad. Using the graphene thermal space temperature testing device for automotive seat heating pads in the above embodiment to test the temperature of the graphene heating sheet on the heating pad of an automotive seat, the method includes the following steps:

[0096] S1. Arrange the graphene heating sheets to be tested in groups on the detection stations on the workstation table 1;

[0097] S2. Start the operation of the automotive seat heating simulation controller to supply power and heat the graphene heating sheets on multiple detection stations in batches by groups;

[0098] S3. Start the operation of the control host to control the high-precision multi-axis robotic arm to drive the thermocouple detection system and the infrared detection system to detect the thermal radiation space temperature of a group of graphene heating sheets one by one after heating is stable;

[0099] S4. After testing a group of graphene heating sheets, the next group of graphene heating sheets with stable heating is tested. At the same time, the worker quickly replaces the tested group of graphene heating sheets with a new group of graphene heating sheets.

[0100] Among them, S3 also includes: the detection host controls the high-precision multi-axis robotic arm to transfer the thermocouple detection system and the infrared detection system to the detection point at least 10 cm above the graphene heating sheet on the test station to detect the temperature of the thermal radiation space of the graphene heating sheet

[0101] The testing method in this embodiment can be used to efficiently and in batches test the heating characteristics of graphene heating sheets before they leave the factory, which is more convenient than traditional testing methods, and the purpose of the test is to target the use environment of the product in car seat heating pads.

[0102] The technical principles of the present invention are described in conjunction with specific embodiments. These descriptions are only for explaining the principles of the present invention and cannot be interpreted in any way as limiting the scope of protection of the present invention. Based on the explanations here, those skilled in the art can associate other specific implementations of the present invention without creative work, and these methods will fall within the scope of protection of the present invention.

Claims

1. A graphene thermal space temperature test device for a car seat heating pad, characterized in that: include: Test bench, high-precision multi-axis robotic arm, automotive seat heating simulation controller, thermocouple detection system, infrared detection system and detection host; The test bench is a frame-type structure and is arranged in a graphene testing workshop of a car heating pad; The interior of the frame structure is composed of a plurality of beams forming a workstation table, which is used to divide the frame structure into an upper space and a lower space; The upper space is a detection space; The high-precision multi-axis mechanical arm is located in the detection space and is controlled and connected to the detection host by means of a cable; The detection host is arranged in the lower space; The thermocouple detection system and the infrared detection system are arranged at the end of the high-precision multi-axis mechanical arm and are respectively connected to the detection host control; The workbench is provided with a plurality of inspection workstations; Each of the inspection stations is provided with a quick-connect assembly; The automobile seat heating simulation controller is arranged on the frame of the upper space of the frame-type structure and connected to the quick-connect assembly; The quick-connect assembly can be quickly connected to the graphene heating sheet of the car heating pad for power supply; The detection host can control the high-precision multi-axis robotic arm to transfer the thermocouple detection system and the infrared detection system to a detection point at least 10 cm above the graphene heating sheet on any workstation to be tested, so as to detect the temperature of the thermal radiation space of the graphene heating sheet.

2. The graphene thermal space temperature test device for the car seat heating pad according to claim 1, characterized in that: Also included: a laser positioning component; The laser positioning assembly is arranged at the end of the high-precision multi-axis mechanical arm and is connected to the detection host; The detection host can accurately locate the distance between the thermocouple detection system and the infrared detection system and the graphene heating sheet on each workstation through the laser positioning component, so as to control the operation of the high-precision multi-axis robotic arm; The high-precision multi-axis robotic arm can synchronously move the thermocouple detection system and the infrared detection system to each detection point according to the instructions of the detection host, so as to respectively detect the temperature of the thermal radiation space of each graphene heating sheet.

3. The graphene thermal space temperature test device for the car seat heating pad according to claim 1, characterized in that: The thermocouple detection system comprises: a detection frame and a thermocouple assembly; The detection frame is fixed at the end of the high-precision multi-axis mechanical arm; The thermocouple assembly is fixed on the detection frame and connected to the detection host.

4. The graphene thermal space temperature test device for the car seat heating pad according to claim 3 is characterized in that: The thermocouple assembly includes a plurality of thermocouples; A plurality of the thermocouple arrays are arranged on the detection frame to detect the spatial radiation temperature of the graphene heating sheet; The array of thermocouples adopts a hexagonal honeycomb topology structure.

5. The graphene thermal radiation space temperature testing device of the automobile seat heating pad according to claim 4 is characterized in that: The distance between adjacent thermocouples is 1 / 8-1 / 10 of the maximum heating area length of the graphene heating sheet being tested; The tip of the thermocouple probe forms an inclination angle of 45°±2° with the surface normal of the graphene heating sheet being measured.

6. The graphene thermal space temperature test device for the car seat heating pad according to claim 1, characterized in that: The infrared detection system includes a multi-spectral infrared camera; The multi-spectral infrared camera is arranged at the end of the high-precision multi-axis mechanical arm and is connected to the detection host.

7. The graphene thermal space temperature test device for the car seat heating pad according to claim 1, characterized in that: A product inspection seat assembly is fixedly provided on each of the inspection stations; The product testing seat assembly can quickly fix and remove the graphene heating sheet to be tested; The quick-connect assembly is fixedly arranged on the product detection seat assembly; The graphene heating sheet arranged on the product detection seat assembly can be connected to the automobile seat heating simulation controller by means of the quick-connect assembly.

8. The graphene thermal space temperature test device for the car seat heating pad according to claim 1, characterized in that: Also includes a touch display assembly; The touch display component is capable of displaying detection data; The touch display component is arranged on the frame body; The touch display component is connected to the detection host; The detection host is connected to an indoor power supply.

9. The graphene thermal space temperature test device for the car seat heating pad according to claim 1, characterized in that: The automobile seat heating simulation controller is connected to the detection host; The detection host can control the operation of the automobile seat heating simulation controller; The test bench is also provided with a control switch; The control switch is connected to the detection host and the automobile seat heating simulation controller respectively; The number of workstations on the workstation table is two groups of 16; The upper space is provided with a transparent protective door and a protective cover.

10. A method for testing the graphene thermal space temperature of a car seat heating pad, using the graphene thermal space temperature testing device for a car seat heating pad as claimed in any one of claims 1 to 9 to test the temperature of the graphene heating sheet of the heating pad on the car seat, characterized in that: The steps include: S1. Arrange the graphene heating sheets to be tested in groups on the testing stations on the workbench; S2, starting the car seat heating simulation controller to supply power and heat the graphene heating sheets on multiple inspection stations in batches; S3, start the control host to control the high-precision multi-axis mechanical arm to drive the thermocouple detection system and the infrared detection system to detect the thermal radiation space temperature of a group of graphene heating sheets after heating and stabilization one by one; S4. After testing a group of graphene heating sheets, the next group of graphene heating sheets with stable heating is tested. At the same time, the worker quickly replaces the tested group of graphene heating sheets with a new group of graphene heating sheets. Among them, S3 also includes: the detection host controls the high-precision multi-axis robotic arm to transfer the thermocouple detection system and the infrared detection system to the detection point at least 10 cm above the graphene heating sheet on the workstation to be tested, so as to detect the temperature of the thermal radiation space of the graphene heating sheet.

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