Pressure measuring device

Abstract

The embodiment of the present disclosure discloses a pressure measuring device, comprising a head model and a plurality of sensing module layers, the head model comprises a main body and a skin layer, the skin layer is arranged outside the main body and is expandable, and the skin layer comprises a plurality of detection areas; a plurality of sensing module layers correspond to a plurality of detection areas one by one, each sensing module layer is attached to the corresponding detection area, and each sensing module layer comprises a plurality of sensors arranged in a matrix. In this way, by setting each sensing module layer to be attached to the corresponding detection area, the irregular surface characteristics of the head model can be adapted, the close attachment of the sensing module layer and the detection area is ensured, the measurement error caused by poor contact is reduced, and the accuracy of pressure measurement is improved, which is also helpful to improve the uniformity of pressure signal detection.

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 directly 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 main body and a skin layer, wherein the skin layer is located on the outside of the main body and can be unfolded, and the skin layer includes multiple detection areas;

[0007] Multiple sensing module layers are provided, and each of the multiple sensing module layers corresponds one-to-one with a multiple of the multiple detection areas. Each of the multiple sensing module layers is attached to the corresponding detection area, and each of the multiple sensing module layers includes multiple sensors arranged in a matrix.

[0008] Optionally, each of the sensing module layers can be laid flat and fitted with the corresponding detection area.

[0009] Optionally, the skin layer is three-dimensionally cut and unfolded into a planar structure.

[0010] Optionally, the deformation of the skin layer along a predetermined direction before and after unfolding shall not exceed 3 mm.

[0011] Optionally, it also includes a protective layer, which is attached to the side of the sensing module layer away from the human head model.

[0012] Optionally, the protective layer is a deformable layer.

[0013] Optionally, the sensing module layer is a deformable layer.

[0014] Optionally, the sensor is a piezoresistive flexible printed circuit board, a piezoresistive film, or a capacitive stretchable sensor.

[0015] Optionally, multiple sensors within the same sensing module may have identical structures.

[0016] And / or, the sensor structures within different sensing modules are different.

[0017] Optionally, the system also includes a data collector, which is located within the main body, and the plurality of sensor module layers are respectively communicatively connected to the data collector.

[0018] One technical advantage of the embodiments disclosed herein is that:

[0019] This invention, by setting each sensing module layer to fit the corresponding detection area, can adapt to the irregular surface features of the human head model, ensuring a tight fit between the sensing module layer and the detection area, 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.

[0020] 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

[0021] 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.

[0022] Figure 1 This is a schematic diagram of a skin layer before unfolding according to an embodiment of the present disclosure;

[0023] Figure 2 This is a schematic diagram of a skin layer after unfolding according to an embodiment of the present disclosure;

[0024] Figure 3 This is a schematic diagram of the mounting of a sensing module layer according to an embodiment of the present disclosure.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Skin layer; 11. Detection area; 2. Sensing module layer; 21. Sensor. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] like Figures 1 to 3 As shown, the pressure measuring device provided in this embodiment of the present invention includes:

[0034] A human head model, comprising a main body and a skin layer 1, wherein the skin layer 1 is located on the outside of the main body and can be unfolded, and the skin layer 1 includes multiple detection areas 11;

[0035] Multiple sensing module layers 2 are provided, and each of the multiple sensing module layers 2 corresponds one-to-one with a multiple of the multiple detection areas 11. Each of the sensing module layers 2 is attached to the corresponding detection area 11, and each of the sensing module layers 2 includes multiple sensors 21 arranged in a matrix.

[0036] 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.

[0037] 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 measurement results closer to the actual pressure experienced by 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.

[0038] like Figure 1 and Figure 2 As shown, the skin layer 1 can be unfolded into a planar structure by combining three-dimensional cutting technology with simulation technology, so that the multiple detection areas 11 included in the skin layer 1 can also be unfolded accordingly, so as to facilitate the subsequent setting of the sensing module layer 2.

[0039] The detection area 11 can be divided into specific parts of the skin layer 1 according to actual detection 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 areas 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 sensing module layer 2 can be evenly placed on its surface, avoiding poor adhesion of the sensing module layer 2 due to surface roughness, thereby ensuring the accuracy of pressure measurement.

[0040] like Figure 3 As shown, the skin layer 1 can be first three-dimensionally cut and unfolded into a planar structure, so that the multiple detection areas 11 included in the skin layer 1 can also be unfolded accordingly. Then, sensing module layers 2 are respectively set on it by means of hot pressing, bonding, etc., so that the multiple sensing module layers 2 correspond one-to-one with the multiple detection areas 11 and form a good fit. Among them, the multiple planar detection areas 11 formed after three-dimensional cutting are continuous but not completely broken, so that the multiple detection areas 11 can be electrically connected to each other by wired or wireless means.

[0041] In this way, on the one hand, it can adapt to the irregular surface features of the human head model, ensuring a tight fit between the sensing module 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, it also allows the sensing module layer 2 to be directly installed after the skin layers 1 of different shapes or curvatures are cut and unfolded. This makes the pressure measurement device flexible to be 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 device.

[0042] When the worn head-mounted device comes into contact with the human head model, pressure is applied to the corresponding detection area 11 of the head model. At this time, the sensing module layer 2, which is attached to the corresponding detection area 11, will deform under the pressure, causing changes in electrical signals such as resistance or capacitance values. Thus, the pressure signal can be measured through the output electrical signal. The good fit between multiple sensing module layers 2 and multiple detection areas 11 also improves the accuracy and sensitivity of pressure measurement.

[0043] like Figure 3As shown, each sensing module layer 2 includes multiple sensors 21 arranged in a matrix. The sensors 21 include, but are not limited to, piezoresistive flexible printed circuit boards, piezoresistive films, and capacitive stretchable sensors 21. In this way, while increasing the sensing density and enhancing the sensing capability of the sensing module layer 2 by utilizing multiple sensors 21, the matrix arrangement of multiple sensors 21 can also accurately sense the pressure applied to different detection areas 11, thereby enabling rapid measurement of the pressure point and the specific pressure value.

[0044] Furthermore, when measuring the pressure distribution of the head-mounted device, the matrix-arranged multiple sensors 21 can clearly distinguish the pressure differences in different parts and detect localized minor pressure fluctuations, thereby improving the accuracy of pressure measurement.

[0045] Optionally, each of the sensing module layers 2 and the corresponding detection area 11 can be laid flat and attached.

[0046] like Figure 3 As shown, the skin layer 1 can be first three-dimensionally cut and unfolded into a planar structure, so that the multiple detection areas 11 included in the skin layer 1 can also be unfolded accordingly. Then, the sensing module layers 2 are correspondingly set on it through methods such as hot pressing and bonding, so that multiple sensing module layers 2 correspond one-to-one with multiple detection areas 11 and are attached. In this way, the air gap between the sensing module layers 2 and the detection areas 11 can be reduced, which helps to reduce signal attenuation and improve signal transmission quality, thereby improving the accuracy of pressure measurement.

[0047] The sensing module layer 2 can be conveniently attached to the corresponding detection area 11 by means of hot pressing, bonding, etc., which can also simplify the manufacturing process of pressure measuring equipment and reduce the manufacturing cost of pressure measuring equipment.

[0048] Optionally, the skin layer 1 is three-dimensionally cut and unfolded into a planar structure.

[0049] Specifically, based on the different curvatures of different parts of the human head model, the skin layer 1 can be unfolded into a planar structure using a combination of three-dimensional cutting and simulation techniques. This allows the multiple detection areas 11 included in the skin layer 1 to also unfold accordingly, facilitating the subsequent fitting and installation of the sensing module layer 2. For example... Figure 1 The diagram shown is a schematic of skin layer 1 before unfolding; as shown Figure 2 The diagram shows the unfolded skin layer 1, which facilitates the setting of the sensing module layer 2 and allows it to adapt to irregularly shaped human head models.

[0050] like Figure 2 and Figure 3 As shown, after the skin layer 1 is cut, there can be a gap between two adjacent detection areas 11 of the skin layer 1, so as to facilitate the flat unfolding of the skin layer 1.

[0051] Optionally, the deformation of the skin layer 1 along a predetermined direction before and after unfolding shall not exceed 3 mm.

[0052] Specifically, the deformation of the skin layer 1 in the vertical direction before and after unfolding can be set to be less than or equal to 3 mm. For example, this deformation can be detected by normal force, so that the skin layer 1 can maintain a small deformation before and after unfolding, thereby reducing the displacement or deformation of the skin layer 1 during the unfolding process and improving the accuracy of the pressure measurement results.

[0053] Optionally, it also includes a protective layer, which is affixed to the side of the sensing module layer 2 away from the human head model.

[0054] Specifically, a protective layer can be formed using flexible materials such as silicone or plastic, and the protective layer can be attached to the side of the sensing module layer 2 away from the human head model, so that the protective layer can deform and adapt to the human head model with complex shapes such as curved surfaces, and can form a good fit with the sensing module layer 2.

[0055] Furthermore, the protective layer on the outside of the sensing module layer 2 can prevent mechanical damage to the sensing module layer 2, such as scratches and impacts, thereby helping to improve the durability and service life of the pressure measurement equipment. At the same time, the protective layer also has functions such as waterproofing, dustproofing, and chemical corrosion resistance, which can also expand the operating environment of the pressure measurement equipment. For example, it can still achieve normal pressure measurement in complex environments such as humidity and dust, so as to avoid signal drift caused by environmental influences.

[0056] The protective layer is kept to a relatively small thickness, which is necessary to provide good protection for the inner sensing module layer 2 while avoiding pressure sensing difficulties caused by excessive thickness, thus ensuring pressure measurement accuracy.

[0057] Optionally, the protective layer is a deformable layer.

[0058] Specifically, the deformable materials include, but are not limited to, elastomers, shape memory polymers, and conductive polymers. These materials can all be deformed to adapt to complex shapes such as curved surfaces of the human head model and can form a good fit with the sensing module layer 2.

[0059] In addition, deformable materials also have excellent impact resistance. Using deformable materials to form a protective layer makes the protective layer also have excellent impact resistance, so that it can adapt to different sizes of head-mounted devices and provide reliable protection for the internal sensing module when worn, thereby helping to extend the service life and measurement accuracy of pressure measurement equipment.

[0060] Optionally, the sensing module layer 2 is a deformable layer, which enables the sensing module layer 2 to adapt to complex shapes such as curved surfaces and to form a good fit with the detection area 11.

[0061] Optionally, the sensor 21 is a piezoresistive flexible printed circuit board, a piezoresistive film, or a capacitive stretchable sensor.

[0062] In one embodiment, the sensor 21 can be configured as a piezoresistive flexible printed circuit board. Multiple sensors 21 within the same sensing module layer 2 can share a single flexible printed circuit board. This allows for the integration of components and wiring while adapting to complex shapes such as curved surfaces on human head models, thereby enhancing the flexibility and integration of the pressure measurement equipment.

[0063] In one embodiment, the sensor 21 can also be a piezoresistive film. The piezoresistive film can convert pressure into resistance change based on the piezoresistive effect, thereby achieving high-precision detection of small signals. It can adapt to human head models with complex shapes such as curved surfaces, and has high response speed and simple molding process.

[0064] In one embodiment, the sensor 21 can also be a capacitive stretchable sensor to adapt to complex shapes such as curved surfaces. It is less affected by temperature, thus avoiding signal drift. It has a simple structure and high sensitivity.

[0065] Optionally, multiple sensors 21 within the same sensing module have the same structure;

[0066] And / or, the sensors 21 in different sensing modules have different structures.

[0067] In one embodiment, multiple sensors 21 with identical structures can be arranged in the same sensing module to reduce the assembly difficulty of the sensing module and improve assembly efficiency, while also ensuring consistency within the same sensing module, thereby reducing assembly errors and improving measurement accuracy.

[0068] In one embodiment, sensors 21 with different structures can be set in different sensing modules to adapt to different detection needs or environments, thereby enabling multimodal sensing and improving the flexibility and adaptability of measurement.

[0069] Optionally, it also includes a data collector, which is disposed within the main body, and the plurality of sensor module layers 2 are respectively communicatively connected to the data collector.

[0070] Specifically, during testing, the head-mounted device is stably worn on the pressure measuring device. The sensing module layer 2, which is attached to the surface of the detection area 11 of 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 corresponding sensing module layer 2 to output an electrical signal. This electrical signal is transmitted to the connected data acquisition unit via a data cable or wireless transmission. The data acquisition unit collects the changes in the electrical signal and transmits the collected electrical signal to the processor via a data cable or wireless transmission, thereby enabling a visual display of the pressure distribution and magnitude.

[0071] The specific acquisition method and principle of the data acquisition device are detailed in existing technologies and will not be elaborated here. The pressure image output by the processor after software processing 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 perform noise reduction and anti-interference processing on the received electrical signal to obtain the pressure values ​​at each pressure detection point and display them through charts or other methods.

[0072] 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.

[0073] 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 main body and a skin layer, wherein the skin layer is located on the outside of the main body and can be unfolded, and the skin layer includes multiple detection areas; Multiple sensing module layers are provided, and each of the multiple sensing module layers corresponds one-to-one with a multiple of the multiple detection areas. Each of the multiple sensing module layers is attached to the corresponding detection area, and each of the multiple sensing module layers includes multiple sensors arranged in a matrix.

2. The pressure measuring device according to claim 1, characterized in that, Each of the sensor module layers can be laid flat and fitted with the corresponding detection area.

3. The pressure measuring device according to claim 1, characterized in that, The skin layer is unfolded into a planar structure through three-dimensional cutting.

4. The pressure measuring device according to claim 1, characterized in that, The deformation of the skin layer along the predetermined direction before and after unfolding shall not exceed 3 mm.

5. The pressure measuring device according to claim 1, characterized in that, It also includes a protective layer, which is attached to the side of the sensing module layer away from the human head model.

6. The pressure measuring device according to claim 5, characterized in that, The protective layer is a deformable layer.

7. The pressure measuring device according to claim 1, characterized in that, The sensing module layer is a deformable layer.

8. The pressure measuring device according to claim 7, characterized in that, The sensor is a piezoresistive flexible printed circuit board, a piezoresistive film, or a capacitive stretchable sensor.

9. The pressure measuring device according to claim 8, characterized in that, The multiple sensors within the same sensing module have the same structure; And / or, the sensor structures within different sensing modules are different.

10. The pressure measuring device according to any one of claims 1 to 9, characterized in that, It also includes a data collector, which is located inside the main body, and the multiple sensing module layers are respectively communicatively connected to the data collector.

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