Pressure measuring device

Abstract

The embodiment of the present disclosure discloses a pressure measuring device, comprising a head model, at least one circuit layer and a sensing layer, the head model comprises a main body and a skin layer, the skin layer is arranged on the outside of the main body, and the skin layer comprises at least one detection area; the circuit layer is equal in number to the detection area and one-to-one corresponding, each circuit layer is directly placed on the corresponding detection area through a laser direct forming process; the sensing layer is located on the outside of the detection area and covers the circuit layer, and the sensing layer is electrically connected with the electrodes of the circuit layer and forms a pressure detection area. In this way, the irregular surface features of the skin layer of the head model can be adapted, the close fit of the circuit layer and the detection area is ensured, the measurement error caused by poor contact is reduced, and therefore the precision of pressure measurement can be improved.

Description

Technical Field

[0001] This utility model relates to the field of pressure detection technology, and more specifically, to a pressure measuring device. Background Technology

[0002] With the development of technology, head-mounted products such as virtual reality devices, augmented reality devices, mixed reality devices, smart helmets, headphones, smart glasses, and smart straps are becoming increasingly common. To assess user comfort, it is necessary to measure the pressure during wear.

[0003] Most existing pressure measurement solutions involve attaching a flexible substrate to a human head model for measurement, which is difficult to meet the complex requirements of flexibility, accuracy, and fit for measuring the large curved surface of the human head model. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a new type of pressure measuring device.

[0005] According to one aspect of the present invention, a pressure measuring device is provided, comprising:

[0006] A human head model, comprising a body and a skin layer, wherein the skin layer is disposed on the outside of the body and includes at least one detection area;

[0007] At least one circuit layer, the number of which is equal to and corresponds one-to-one with the detection area, and each circuit layer is directly placed in the corresponding detection area by laser direct forming process;

[0008] A sensing layer is located outside the detection area and covers the circuit layer. The sensing layer is electrically connected to the electrodes of the circuit layer to form a pressure detection area.

[0009] Optionally, the circuit layer is a multi-point matrix electrode structure.

[0010] Optionally, the circuit layer includes an isolated first electrode layer and a second electrode layer, the first electrode layer and the second electrode layer being located on the outer surface of the detection area.

[0011] Optionally, the first electrode layer is electrically connected to the outer surface of the detection area via a first line.

[0012] Optionally, one of the first electrode layer and the second electrode layer is embedded within the other.

[0013] Optionally, the head model has multiple connection holes, the connection holes are covered with conductive material, and the second electrode layer is electrically connected to the inner surface of the detection area through the connection holes and the second line.

[0014] Optionally, the connection hole includes a first part and a second part connected together, the end of the first part away from the second part is connected to the second electrode layer, the end of the second part away from the first part is connected to the second line on the surface of the detection area, and the apertures of the first part and the second part are different.

[0015] Optionally, the system includes multiple circuit layers, and the skin layer includes multiple detection areas, with different circuit layer structures located in different detection areas.

[0016] Optionally, the sensing layer is a flexible conductive layer or a piezoresistive sensitive layer;

[0017] And / or, the sensing layer is formed on the outer surface of the detection area by a spraying process, a coating process, or a hot pressing process.

[0018] Optionally, the system also includes a data collector, which is located within the main body, and the line layer is communicatively connected to the data collector.

[0019] One technical advantage of the embodiments disclosed herein is that:

[0020] This invention utilizes laser direct forming technology to directly create circuit layers on complex-shaped detection areas. Whether the detection area is a regular planar area or a complex, irregular curved surface, laser direct forming can precisely process according to a preset circuit pattern. This allows it to adapt to the irregular surface features of the skin layer on a human head model, ensuring a tight fit between the circuit layer and the detection area, reducing measurement errors caused by poor contact, and thus improving the accuracy of pressure measurement. Furthermore, laser direct forming technology is highly adaptable, capable of directly forming circuit layers on the surface of detection areas of different shapes. This enables the pressure measurement device to be flexibly applied to different parts of the human head and even extended to the surfaces of other objects with complex shapes, thereby broadening the application range of the pressure measurement device.

[0021] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0022] The accompanying drawings, which form part of this specification, illustrate embodiments of the present invention and, together with the specification, serve to explain the principles of the present invention.

[0023] Figure 1 This is a schematic diagram of a pressure measuring device according to an embodiment of the present disclosure;

[0024] Figure 2 This is another schematic diagram of a pressure measuring device according to an embodiment of the present disclosure;

[0025] Figure 3 This is a cross-sectional view of a pressure measuring device according to an embodiment of the present disclosure;

[0026] Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Skin layer; 11. Detection area; 12. Connection hole; 121. First part; 122. Second part; 2. Circuit layer; 3. Sensing layer. Detailed Implementation

[0029] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0030] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0031] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0032] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0034] This invention provides a pressure measuring device that can test the pressure when wearing a head-mounted device, so as to evaluate the wearing comfort.

[0035] like Figure 1 and Figure 2 As shown, the pressure measuring device provided in this embodiment of the present invention includes:

[0036] A human head model, comprising a main body and a skin layer 1, wherein the skin layer 1 is disposed on the outside of the main body and the skin layer 1 includes at least one detection area 11;

[0037] At least one circuit layer 2, the number of circuit layers 2 is equal to the number of detection areas 11 and they correspond one-to-one, and each circuit layer 2 is directly placed in the corresponding detection area 11 by laser direct forming process;

[0038] Sensing layer 3 is located outside the detection area 11 and covers the circuit layer 2. The sensing layer 3 is electrically connected to the electrodes of the circuit layer 2 to form a pressure detection area.

[0039] Specifically, the shape of the human head model is usually designed according to the physiological structure of the human head. For example, it may include two head models, a left head model and a right head model, or four head models, a left head model, a right head model, a front head model and an upper head model. This design can ensure that when the pressure measuring device measures pressure at different parts, it is consistent with the distribution of pressure on the actual human head.

[0040] The human head model can be formed by a rigid body and a flexible skin layer 1, with the flexible skin layer 1 located on the outside of the rigid body. The flexible skin layer 1 can be made of a material with a density and elastic modulus similar to that of a human head, such as high-density polyethylene or silicone. Taking silicone as an example, it has good flexibility and elasticity, which can simulate the realistic feel of a human head, making pressure measurements closer to the actual pressure applied to a human head. At the same time, silicone also has advantages such as good chemical stability and aging resistance, ensuring the stability of the human head model's performance during long-term use.

[0041] like Figure 1 and Figure 2 As shown, a detection area 11 can be divided into specific parts of the skin layer 1 according to actual testing needs. For example, if it is necessary to measure the pressure distribution when the head is impacted, the detection area 11 can be set in parts that are prone to impact, such as the front head mold. The surface of the detection area 11 can be smoothed and cleaned to ensure that the circuit layer 2 can be uniformly formed on its surface, avoiding defects or abnormalities in the circuit layer 2 due to surface roughness, thereby ensuring the accuracy of pressure measurement.

[0042] The circuit layer 2 is formed in the detection area 11 of the skin layer 1 using a laser direct forming (LDS) process. Laser direct forming is a novel manufacturing technology that combines laser technology with chemical plating, enabling the formation of the required circuit layer 2 within the detection area 11. Specifically, the laser direct forming process utilizes a laser beam to precisely scan the surface of the detection area 11 according to a pre-defined circuit pattern, achieving micron-level processing precision for the circuit.

[0043] During the formation of circuit layer 2, the laser can precisely control the width, spacing, and shape of the lines, ensuring the quality and consistency of circuit layer 2. Compared to traditional printed circuit board (PCB) manufacturing processes, laser direct forming eliminates the need for a mask, avoiding line deviations caused by mask manufacturing errors. Furthermore, the stable quality of circuit layer 2 formed by laser direct forming ensures a robust and reliable connection between sensing layer 3 and circuit layer 2.

[0044] Furthermore, this process can directly form the circuit layer 2 on the complex-shaped detection area 11. Whether it is a regular planar detection area 11 or a complex irregular curved surface detection area 11, the laser direct forming process can accurately process it according to the preset circuit pattern. On the one hand, it can adapt to the irregular surface features of the skin layer 1 of the human head model, ensuring a tight fit between the circuit layer 2 and the detection area 11, reducing measurement errors caused by poor contact, thereby improving the accuracy of pressure measurement and also helping to improve the uniformity of pressure signal detection. On the other hand, the laser direct forming process also has strong adaptability, and can directly form the circuit layer 2 on the surface of the detection area 11 with different shapes or curvatures. This allows the pressure measurement device to be flexibly applied to different parts of the human head, and can even be extended to the surface of other objects with complex shapes for pressure measurement, thereby broadening the application range of the pressure measurement device.

[0045] In one embodiment, depending on the actual detection requirements, multiple detection areas 11 can be divided on the skin layer 1, and a circuit layer 2 can be formed on the surface of each detection area 11 to enable pressure detection at different locations.

[0046] Sensing layer 3 can be made of piezoresistive sensitive materials, such as conductive rubber or piezoresistive films. Taking conductive rubber as an example, it is a composite material with piezoresistive properties, consisting of a rubber matrix and conductive fillers. When conductive rubber is subjected to pressure, the contact state between the conductive fillers inside changes, resulting in a change in resistance. By measuring the change in resistance, the magnitude of the pressure can be calculated.

[0047] like Figure 1 As shown, the sensing layer 3 is positioned outside the detection area 11 of the head model, that is, on the side closer to the circuit layer 2, ensuring that the sensing layer 3 completely covers the circuit layer 2. The sensing layer 3 and the circuit layer 2 can be electrically connected by means of conductive adhesive or welding to ensure that the pressure signal can be accurately transmitted to the circuit layer 2.

[0048] Optionally, the circuit layer is a multi-point matrix electrode structure.

[0049] like Figure 1 and Figure 2As shown, the circuit layer 2 formed within each detection area 11 is typically a multi-point matrix electrode structure. In one embodiment, this structure can consist of row electrodes and column electrodes, which can be nested together, for example, the row electrodes can be nested within the column electrodes, or vice versa, to save space on the outer surface of the detection area 11 for the circuit layer 2 design.

[0050] When sensing layer 3 is subjected to pressure, its resistance changes. Since sensing layer 3 is connected to the multi-point matrix electrode structure of circuit layer 2, the resistance change at each connection point is detected by the external pressure measurement circuit. The pressure measurement circuit scans the row and column electrodes, sequentially reading the resistance value at each connection point and converting it into a corresponding pressure value. In this way, each connection point forms a pressure detection point. Through these pressure detection points, accurate and rapid measurement of the pressure distribution in the detection area 11 can be achieved, thus enabling real-time, high-precision pressure measurement.

[0051] Therefore, by utilizing the multi-point matrix-distributed wiring layer 2 formed in the detection area 11 of the human head model, pressure detection of a large detection area 11 can be achieved with a smaller number of electrodes. By scanning the row and column electrodes and sequentially detecting the changes in electrical signals at each connection point, it is possible to determine whether the point is under pressure and the magnitude of the pressure. This structure also reduces the number of electrodes and wiring complexity, thereby reducing the cost and size of the pressure measurement equipment.

[0052] This dense, multi-point matrix electrode arrangement allows for precise capture of pressure changes in minute areas within the detection zone 11. When measuring pressure distribution on the human head, it clearly distinguishes pressure differences between different parts and detects minute local pressure fluctuations, thus improving the accuracy of pressure measurement. Furthermore, adjusting the number and arrangement of row and column electrodes can alter the density and distribution of pressure detection points.

[0053] In addition, the pressure measuring device can be used to calibrate the sensing layer 3 to obtain different pressure ranges, so as to meet the wear pressure measurement needs of different head-mounted devices.

[0054] Optionally, the sensing layer 3 is attached to the surface of the skin layer 1. In this way, a reliable and stable electrical connection can be achieved between the sensing layer 3 and the electrodes of the circuit layer 2 in the detection area 11, while the sensing layer 3 can also adapt to the curved shape of the skin layer 1 of the human head model, thereby improving the reliability of pressure detection.

[0055] Optionally, the circuit layer 2 includes an isolated first electrode layer and a second electrode layer, the first electrode layer and the second electrode layer being located on the outer surface of the detection area 11.

[0056] Specifically, line layer 2 may include a first electrode layer and a second electrode layer that are independent of each other, i.e., electrically isolated. One of the first electrode layer and the second electrode layer may be a row electrode, and the other of the first electrode layer and the second electrode layer may be a column electrode. The two can be arranged as follows: Figure 1 The nesting arrangement shown, such as nesting row electrodes within column electrodes or vice versa, can save space on the outer surface of the detection area 11 while forming a multi-point matrix electrode structure, thus contributing to the miniaturization and integration of pressure measurement equipment.

[0057] In one embodiment, the first electrode layer and the second electrode layer can be arranged at intervals on the outer surface of the detection area 11, that is, they are arranged on the outer surface of the detection area 11 along their respective arrangement directions, without the nested design described above, and a multi-point matrix electrode structure can also be formed.

[0058] Optionally, the first electrode layer is electrically connected to the outer surface of the detection area 11 via a first line.

[0059] like Figure 1 As shown, the first electrode layer can be electrically connected directly through the first line on the outer surface of the detection area 11, so that the pressure measurement circuit can perform sequential scanning. Figure 1 The first electrode layer shown can be a row electrode, and the three rows of row electrodes are electrically connected through three lines.

[0060] Optionally, one of the first electrode layer and the second electrode layer is embedded within the other.

[0061] like Figure 1 As shown, row electrodes can be nested within column electrodes, or column electrodes can be nested within row electrodes. This allows for the formation of a multi-point matrix electrode structure while saving the space occupied by the circuit layer 2 on the outer surface of the detection area 11, thus contributing to the miniaturization and integration of pressure measurement equipment.

[0062] Optionally, the head model has multiple connection holes 12, the connection holes 12 are covered with conductive material, and the second electrode layer is electrically connected to the inner surface of the detection area 11 through the connection holes 12 and the second line.

[0063] Specifically, the connection hole 12 is a through-hole within the skin layer 1, and its inner wall is covered with a conductive material such as copper to form an electrical connection hole. Through the connection hole 12, the second electrode layer on the outer surface of the detection area 11 can be connected to the second circuit on the inner surface of the detection area, thus achieving electrical connection of the second electrode layer within the inner surface of the detection area, facilitating sequential scanning by the pressure measurement circuit. The connection hole 12 enables a convenient and reliable electrical connection between the second electrode layer and the second circuit, eliminating the need for additional wiring and reducing manufacturing complexity.

[0064] In one embodiment, gold wires can be used to make an electrical connection between the second line on the inner surface of the detection area 11 and the second electrode layer on the outer surface of the detection area 11, so as to meet different layout requirements.

[0065] Optionally, the connection hole 12 includes a first part 121 and a second part 122 connected together. The end of the first part 121 away from the second part 122 is connected to the second electrode layer, and the end of the second part 122 away from the first part 121 is connected to the second line on the inner surface of the detection area 11. The apertures of the first part 121 and the second part 122 are different.

[0066] Specifically, the connection hole 12 includes a first part 121 and a second part 122 with different apertures, which is equivalent to setting a gradual transition region on the signal transmission path. This gradual structure enables the signal to gradually adapt to the impedance changes caused by different apertures when it is transmitted from the second electrode layer on the outer surface to the second line on the inner surface (or vice versa), thereby effectively reducing signal reflection and improving the reliability of pressure measurement.

[0067] Optionally, the aperture of the first portion 121 is larger than the aperture of the second portion 122.

[0068] like Figure 3 and Figure 4 As shown, the aperture of the first part 121 can be set to be larger than that of the second part 122, so that the larger aperture of the first part 121 can provide a wider connection base, enhancing the adhesion and mechanical stability of the second electrode layer on the outer surface of the detection area 11; while the smaller aperture of the second part 122 can be embedded more deeply into the human head model. This combined structure allows the connection hole 12 to better disperse stress when subjected to external forces, reducing the risk of loosening and detachment of the connection, thereby improving the overall structural strength and durability of the pressure measuring device.

[0069] Alternatively, the aperture of the first part 121 can be set to be smaller than the aperture of the second part 122, so that the second part 122 with a larger aperture can be connected to the second line on the surface of the detection area.

[0070] Optionally, the system includes multiple circuit layers 2, and the skin layer 1 includes multiple detection areas 11, with different structures for the circuit layers 2 located in different detection areas 11.

[0071] Specifically, based on actual testing needs, multiple testing areas 11 can be divided on the skin layer 1, and a circuit layer 2 can be formed on the surface of each testing area 11 to enable pressure testing at different locations.

[0072] The circuit layer 2 in different detection areas 11 can be configured to have different structures, so that the sensing layer 3 covering different detection areas 11 and the corresponding electrically connected circuit layer 2 can jointly form different pressure detection areas. Different pressure detection areas correspond to different parts, thereby adapting to the detection needs of different parts.

[0073] Optionally, the sensing layer 3 is a flexible conductive layer or a piezoresistive sensitive layer.

[0074] In one embodiment, the sensing layer 3 formed by the flexible conductive material has good flexibility and conformability, and can closely adhere to the surface of the skin layer 1, reducing the measurement error caused by the gap between the sensing layer 3 and the detection area 11, so that the resistance change of each part of the sensing layer 3 can accurately reflect the actual pressure distribution.

[0075] In addition, the flexible conductive material has good uniformity, which can ensure that the resistance distribution of the sensing layer 3 is uniform during the manufacturing process, thus avoiding measurement deviations caused by uneven resistance.

[0076] In one embodiment, the piezoresistive sensing material includes, but is not limited to, conductive rubber and piezoresistive film. Conductive rubber has good flexibility and wear resistance, making it suitable for applications requiring frequent contact and friction, such as pressure measurement in head-mounted devices; while piezoresistive film has high sensitivity and response speed, making it suitable for applications requiring high accuracy and real-time performance in pressure measurement, such as physiological pressure measurement in medical monitoring.

[0077] Optionally, the sensing layer 3 is formed on the outer surface of the detection area 11 by a spraying process, a coating process, or a hot pressing process.

[0078] Specifically, spraying, coating, or hot-pressing processes are characterized by simple operation and high production efficiency, enabling the sensing layer 3 to be formed quickly and uniformly on the outer side of the detection area 11. Compared with traditional sensing layer 3 manufacturing processes, these processes do not require complex mold manufacturing and processing, reducing production links and process steps, and simplifying the production process flow.

[0079] Optionally, the system also includes a data collector, which is located within the main body, and the line layer 2 is communicatively connected to the data collector.

[0080] During testing, the head-mounted device is stably worn on the pressure measuring device. The sensing layer 3, attached to the surface of the detection area 11 on the skin layer 1, comes into contact with the head-mounted device and is subjected to pressure. The pressure in the contact area causes the sensing layer 3 to output an electrical signal. This electrical signal is transmitted through the electrical connection layer 2 to the data acquisition unit connected via a data cable or wireless communication. The data acquisition unit collects the changes in the electrical signal and transmits the collected electrical signal to the processor via the data cable or wirelessly, thereby visually displaying the pressure distribution and magnitude.

[0081] For details on the specific data collection methods and principles of the data collector, please refer to existing technologies; they will not be elaborated upon here.

[0082] This invention also provides a pressure detection system, including a processor and the aforementioned pressure measuring device.

[0083] In this system, the processor receives the electrical signals collected by the data acquisition unit and processes them through software. The output pressure image can be presented as a pressure cloud map, using different colors or grayscale levels to represent pressure magnitude. The software can output the currently measured real-time pressure value and record and save the pressure data during the test. In other embodiments, the processor can also process the received electrical signals to obtain the pressure values ​​at each pressure detection point and display them through charts or other means.

[0084] This utility model also provides a method for manufacturing a pressure measuring device, including:

[0085] S1. Obtain a human head model, the human head model including a body and a skin layer 1, the skin layer 1 being disposed on the outside of the body, and the skin layer 1 including at least one detection area 11;

[0086] Specifically, a detection area 11 can be set at a specific location on the skin layer 1 of the head model, according to actual testing needs. For example, if it is necessary to measure the pressure distribution when the head is impacted, the detection area 11 can be set at a location on the front of the head model that is prone to impact. The surface of the detection area 11 can be smoothed and cleaned to ensure that the circuit layer 2 can be uniformly formed on its surface, avoiding defects or other abnormalities in the circuit layer 2 due to surface roughness, thereby ensuring the accuracy of pressure measurement.

[0087] S2. A circuit layer 2 is formed in each of the detection areas 11 using a laser direct forming process;

[0088] Specifically, the circuit layer 2 is formed in the detection area 11 of the skin layer 1 using a laser direct forming (LDS) process. Laser direct forming is a novel manufacturing technology that combines laser technology with chemical plating, enabling the formation of the required circuit layer 2 within the detection area 11. Specifically, the laser direct forming process utilizes a laser beam to precisely scan the surface of the detection area 11 according to a pre-defined circuit pattern, achieving micron-level processing precision for the circuit.

[0089] This process can directly form the circuit layer 2 on the complex-shaped detection area 11. Whether it is a regular planar detection area 11 or a complex irregular curved surface detection area 11, the laser direct forming process can accurately process according to the preset circuit pattern. On the one hand, it can adapt to the irregular surface features of the skin layer 1 of the human head model, ensuring a tight fit between the circuit layer 2 and the detection area 11, reducing measurement errors caused by poor contact, thereby improving the accuracy of pressure measurement. On the other hand, the laser direct forming process also has strong adaptability, and can directly form the circuit layer 2 on the surface of detection areas 11 of different shapes. This allows the pressure measurement equipment to be flexibly applied to different parts of the human head, and can even be extended to the surface of other objects with complex shapes for pressure measurement, thus broadening the application range of the pressure measurement equipment.

[0090] like Figure 1 and Figure 2 As shown, the circuit layer 2 formed within the detection area 11 is typically a multi-point matrix electrode structure, which consists of intersecting row and column electrodes. The row and column electrodes can be connected to an external pressure measurement circuit via wires, and each connection point forms a pressure detection point, enabling finer division of the detection area 11 and thus achieving multi-point detection.

[0091] Therefore, this dense, multi-point matrix electrode arrangement allows for precise capture of pressure changes in minute areas within the detection area 11. When measuring pressure distribution on the human head, it clearly distinguishes pressure differences between different parts and detects minute local pressure fluctuations, thus improving the accuracy of pressure measurement. Furthermore, adjusting the number and arrangement of row and column electrodes can alter the density and distribution of pressure detection points.

[0092] S3. A sensing layer 3 is provided on the outside of the detection area 11, such that the sensing layer 3 covers the circuit layer 2, and the sensing layer 3 is electrically connected to the electrodes of the circuit layer 2 to form a pressure detection area.

[0093] Specifically, the sensing layer 3 can be placed on the outside of the head model detection area 11, that is, on the side close to the circuit layer 2, and it is ensured that the sensing layer 3 can completely cover the circuit layer 2. The electrodes of the sensing layer 3 and the circuit layer 2 can be electrically connected by means of conductive adhesive or welding to ensure that the pressure signal can be accurately transmitted to the electrodes of the circuit layer 2.

[0094] When sensing layer 3 is subjected to pressure, its resistance changes. Since sensing layer 3 is connected to the multi-point matrix electrode structure of circuit layer 2, the resistance change at each connection point is detected by the external pressure measurement circuit. The pressure measurement circuit scans the row and column electrodes, sequentially reading the resistance value at each connection point and converting it into a corresponding pressure value. In this way, each connection point forms a pressure detection point. Through these pressure detection points, accurate and rapid measurement of the pressure distribution in the detection area 11 can be achieved, thus enabling real-time, high-precision pressure measurement.

[0095] Optionally, after acquiring the human head model, which includes a body and a skin layer 1, the skin layer 1 being disposed on the outside of the body and including at least one detection area 11, the method further includes:

[0096] An activation layer is pre-coated onto the detection area 11.

[0097] Specifically, a laser beam can be used to scan the surface of the detection area 11 according to a preset circuit pattern for activation treatment. The laser energy causes physical and chemical changes on the material surface, forming a catalytically active micro-region, i.e., an activation layer. These micro-regions will become the starting points for metal deposition in the subsequent chemical plating process, facilitating the formation of the subsequent circuit layer 2. The laser parameters (such as power, scanning speed, pulse frequency, etc.) can be precisely adjusted according to the material properties of the skin layer 1 and the design requirements of the circuit layer 2.

[0098] Subsequently, the laser-activated detection area 11 can be immersed in a chemical plating solution containing metal ions. In the catalytically active micro-region, the metal ions are reduced to metal atoms and deposited on the material surface, forming a continuous metal circuit, i.e., the circuit layer 2.

[0099] Afterwards, the circuit layer 2 can be cleaned and dried to remove any residual chemical plating solution from the surface. Then, the circuit layer 2 can be surface treated as needed, such as electroplating with nickel or gold, to improve its conductivity, corrosion resistance, and wear resistance.

[0100] Optionally, before pre-plating the activation layer on the detection area 11, the method further includes:

[0101] Multiple connection holes 12 are made inside the human head model. The connection holes 12 are covered with conductive material, and the multiple connection holes 12 are positioned opposite to the detection area 11.

[0102] Specifically, the connection hole 12 is an electrical connection hole. It can be formed by combining an opening process with a plating or deposition process to cover the inner wall of the through-hole with a conductive material such as copper. Before activating the detection area 11, the connection hole 12 is opened to ensure the reliability of the activation process, thus facilitating the subsequent formation of the circuit layer 2. Furthermore, the connection hole 12 can also serve as a penetration channel for the pre-plating solution, allowing the pre-plating solution to more evenly cover the detection area 11 and the inner surface of the connection hole 12. This helps improve the adhesion uniformity and quality of the activation layer, and also reduces defects and peeling of the activation layer.

[0103] like Figures 1 to 4 As shown, the connection hole 12 is positioned opposite the detection area 11, so that the connection hole 12 provides a direct and low-impedance path for signal transmission to the second electrode layer on the outer surface of the detection area 11. Compared with the wiring design without the connection hole 12, the signal does not need to bypass the complex internal structure of the model, reducing the path length and medium changes during signal transmission, thereby reducing signal attenuation.

[0104] Optionally, the laser direct forming process forms the circuit layer 2 in the detection area 11, including:

[0105] A first electrode layer, a first circuit, and a second electrode layer are formed directly on the outer surface of the detection area 11 using a laser direct forming process, and a second circuit is formed on the inner surface of the detection area 11.

[0106] The first electrode layer is electrically connected to the outer surface of the detection area 11 via the first line.

[0107] The second electrode layer is electrically connected to the inner surface of the detection area 11 through the connection hole 12 and the second line.

[0108] Specifically, the first electrode layer, the first circuit, and the second electrode layer can be conveniently formed directly on the outer surface of the detection area 11 using a laser direct forming process. The first electrode layer and the second electrode layer have different arrangements. For example, one of the first electrode layer and the second electrode layer can be a row electrode, and the other of the first electrode layer and the second electrode layer can be a column electrode, so that their arrangement directions are perpendicular.

[0109] like Figure 1 and Figure 2As shown, the lines can be simultaneously formed on the outer surface and the inner surface of the detection area 11 by laser direct forming process, so that the first line on the outer surface of the detection area 11 and the second line on the inner surface of the detection area 11 can be formed simultaneously, which can also reduce the process difficulty and improve the processing efficiency.

[0110] Therefore, the first electrode layer on the outer surface of the detection area 11 can be electrically connected directly through the first line on the outer surface of the detection area 11, so that the pressure measurement circuit can perform sequential scanning. Through the connection hole 12, the second electrode layer on the outer surface of the detection area 11 can be connected to the second line on the inner surface of the detection area, so as to realize the electrical connection of the second electrode layer in the inner surface of the detection area, and also avoid interference between the first electrode layer and the second electrode layer, thereby facilitating the pressure measurement circuit to perform sequential scanning.

[0111] Optionally, the sensing layer 3 is disposed on the outer side of the detection area 11, comprising:

[0112] A flexible conductive material is applied to the side of the detection area 11 near the circuit layer 2 using a spraying or coating process to form a sensing layer 3.

[0113] Alternatively, a pre-fabricated flexible conductive film can be obtained and bonded to the side of the detection area 11 near the circuit layer 2 using a hot-pressing process to form a sensing layer 3.

[0114] In one embodiment, a flexible conductive material can be applied to the side of the detection area 11 near the circuit layer 2 using a spraying or coating process. This allows the conductive material to adhere uniformly and tightly to the surface of the detection area 11. This uniform coverage ensures that the sensing layer 3 can make full contact with the circuit layer 2, thereby guaranteeing the reliability of pressure signal transmission. Furthermore, the uniform coverage of the conductive material also allows the sensing layer 3 to adapt to the curved surface of the skin layer 1 of the human head model, ensuring a good fit between the sensing layer 3 and the curved surface of the skin layer 1, thus guaranteeing the accuracy of pressure detection.

[0115] In one embodiment, a pre-fabricated flexible conductive film can be prepared in advance. This pre-fabricated flexible conductive film typically possesses uniform conductivity and tensile properties. Subsequently, the pre-fabricated flexible conductive film can be bonded to the detection area 11 using a hot-pressing process. During hot pressing, the pre-fabricated flexible conductive film deforms and forms a tight bond with the detection area 11, thereby reducing contact resistance and ensuring efficient signal transmission. The precise structure of the pre-fabricated film can be designed for specific detection requirements, further improving sensitivity to specific signals.

[0116] Furthermore, the hot-pressing process allows the pre-fabricated flexible conductive film to be firmly bonded to the detection area 11, forming a stable mechanical connection. This robust bonding method prevents the sensing layer 3 from detaching or shifting during use, ensuring long-term stable contact between the sensing layer 3 and the detection area 11.

[0117] Therefore, whether it is a sprayed or coated flexible conductive material or a pre-fabricated flexible conductive film, it possesses excellent flexibility. This flexibility allows the sensing layer 3 to adapt to the skin layer 1 of a complex human head model and maintain stable sensing performance within a large deformation range.

[0118] The above embodiments mainly describe the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. For the sake of brevity, they will not be elaborated here.

[0119] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A pressure measuring device, characterized in that, include: A human head model, comprising a body and a skin layer, wherein the skin layer is disposed on the outside of the body and includes at least one detection area; At least one circuit layer, the number of which is equal to and corresponds one-to-one with the detection area, and each circuit layer is directly placed in the corresponding detection area by laser direct forming process; A sensing layer is located outside the detection area and covers the circuit layer. The sensing layer is electrically connected to the electrodes of the circuit layer to form a pressure detection area.

2. The pressure measuring device according to claim 1, characterized in that, The circuit layer has a multi-point matrix electrode structure.

3. The pressure measuring device according to claim 2, characterized in that, The circuit layer includes an isolated first electrode layer and a second electrode layer, which are located on the outer surface of the detection area.

4. The pressure measuring device according to claim 3, characterized in that, The first electrode layer is electrically connected to the outer surface of the detection area via a first circuit.

5. The pressure measuring device according to claim 3, characterized in that, One of the first electrode layer and the second electrode layer is embedded in the other.

6. The pressure measuring device according to claim 3, characterized in that, The human head model has multiple connection holes, and the connection holes are covered with conductive material. The second electrode layer is electrically connected to the inner surface of the detection area through the connection holes and the second line.

7. The pressure measuring device according to claim 6, characterized in that, The connection hole includes a first part and a second part connected together. The end of the first part away from the second part is connected to the second electrode layer, and the end of the second part away from the first part is connected to the second line on the surface of the detection area. The apertures of the first part and the second part are different.

8. The pressure measuring device according to claim 1, characterized in that, It includes multiple circuit layers, and the skin layer includes multiple detection areas, with different circuit layer structures located in different detection areas.

9. The pressure measuring device according to claim 1, characterized in that, The sensing layer is a flexible conductive layer or a piezoresistive sensitive layer; And / or, the sensing layer is formed on the outer surface of the detection area by a spraying process, a coating process, or a hot pressing process.

10. The pressure measuring device according to claim 1, characterized in that, It also includes a data collector, which is located inside the main body and is communicatively connected to the data collector by the line layer.

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