A headgear clamping force measurement system and method

Abstract

The application discloses a head-mounted device clamping force measuring system and method, which comprises a pressure sensing module and a measuring module, the measuring module comprises at least one set of measuring devices and at least one air guide device, the measuring device comprises at least one hollow compressible unit, the measuring device is used for discharging gas when the volume is deformed, the first end of the air guide device is communicated with the measuring device, the second end of the air guide device is communicated with the pressure sensing module, and the air guide device is used for transmitting the gas to the pressure sensing module, and the pressure sensing module is used for determining the clamping force of the head-mounted device according to the pressure value of the gas, at least one hollow compressible unit in the technical scheme discharges the gas through the first end of the air guide device when being extruded, and then the volume change of the measuring device is converted into the pressure change, the clamping force is determined through the pressure sensing module communicated with the second end of the air guide device, and the measurement result is more accurate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of clamping force measurement, in particular to a clamping force measurement system and method of a head-mounted device. BACKGROUND

[0002] When a user wears a head-mounted earphone, the head beam of the earphone provides a clamping force to fix the earphone on both sides of the user's head, and provides a cushion for the user through the ear pad. The clamping force provided by the head beam and the tightness of the ear pad to the user's ear will affect the comfort and auditory perception of the user.

[0003] The method for evaluating the comfort and tightness of the head-mounted earphone in the prior art usually takes the clamping force as the evaluation parameter. For example, the head-mounted earphone is fixed on a clamp, the ear pad is tightly pressed against a metal plane, the metal plane is connected to a pressure sensor through a connecting rod, and then the clamping force of the head-mounted earphone is measured. However, in the process of measuring the clamping force through the metal plane and the connecting rod in the prior art, part of the clamping force may drive the connecting rod to move through the metal plane, thereby causing a loss of extrusion force, so that the measurement result of the extrusion force is not accurate. SUMMARY

[0004] The embodiment of the present application provides a clamping force measurement system of a head-mounted device. The volume change when extrusion occurs is converted into pressure change through at least one hollow compressible unit and a gas guiding device, and then the clamping force is determined through a pressure sensing module, so that the measurement result is more accurate.

[0005] In a first aspect, the embodiment of the present application provides a clamping force measurement system of a head-mounted device, which comprises a pressure sensing module and a measurement module. The measurement module comprises at least one set of measurement devices and at least one gas guiding device. The measurement device comprises at least one hollow compressible unit, and the measurement device is used to discharge gas when the volume is deformed when extrusion occurs. The first end of the gas guiding device is in communication with the measurement device, and the second end of the gas guiding device is in communication with the pressure sensing module, and is used to transmit the gas to the pressure sensing module. The pressure sensing module is used to determine the clamping force of the head-mounted device according to the pressure value of the gas. Wherein, a clamping space is formed between the measurement devices, and the clamping space is configured to be clamped on the head.

[0006] Optionally, the measurement module comprises a plurality of sets of measurement devices and a plurality of gas guiding devices, and the gas guiding devices correspond to the measurement devices one by one and are in communication. The pressure sensing module comprises a plurality of connection interfaces, and the gas guiding devices are used to transmit the gas discharged by the measurement devices to one connection interface.

[0007] Optionally, the plurality of sets of measurement devices are uniformly distributed along the circumferential direction.

[0008] Optionally, the measuring module further comprises a ring-shaped double-layer film; the ring-shaped double-layer film is hollow ring-shaped, and the measuring device is arranged in the ring-shaped double-layer film.

[0009] Optionally, each group of measuring devices is a hollow compressible unit matrix, and each group of measuring devices comprises a plurality of hollow compressible units; the plurality of hollow compressible units are arranged in communication, and at least one hollow compressible unit is in communication with the air guide device.

[0010] Optionally, the pressure sensing module comprises at least one pressure sensing device and a processing device; the pressure sensing device is in communication with the second end of the air guide device, and is used for sensing the pressure of the gas; the processing device is electrically connected with the pressure sensing device, and is used for determining the clamping force of the head-mounted device according to the pressure.

[0011] Optionally, the pressure sensing module further comprises a conversion display device; the conversion display device is electrically connected with the processing device, and is used for converting an analog signal output by the processing device into a digital signal, and displaying the clamping force determined by the processing device.

[0012] Optionally, the air guide device further comprises a third end and a switch valve; the switch valve is arranged in a gas path between the third end and the atmospheric pressure; the pressure sensing module is electrically connected with the switch valve, and is used for controlling the switch valve to be turned on or turned off.

[0013] Optionally, the clamping force measuring system comprises a posture adjusting module; the posture adjusting module comprises a clamping force distribution information receiving end, the pressure sensing module comprises a clamping force distribution information output end, the clamping force distribution information output end is electrically connected with the clamping force distribution information receiving end, and the posture adjusting module is used for adjusting the posture of the head-mounted device according to the clamping force distribution information.

[0014] In a second aspect, an embodiment of the present application further provides a clamping force measuring method of a head-mounted device, applied to the clamping force measuring system of the head-mounted device, and the clamping force measuring method of the head-mounted device comprises:

[0015] obtaining a digital pressure value of the gas discharged when the volume of the measuring device is deformed; and determining the clamping force of the head-mounted device according to the digital pressure value.

[0016] Optionally, before the digital pressure value of the gas discharged when the volume of the measuring device is deformed is obtained, the method further comprises:

[0017] determining an actual clamping force of the head-mounted device under a preset clamping force; determining a correction parameter of the clamping force measuring system according to the preset clamping force and the actual clamping force; and correcting the clamping force measuring system according to the correction parameter.

[0018] Optionally, the air guide device further comprises a third end and a switch valve, the switch valve being arranged in an air path between the third end and the atmospheric pressure; the pressure sensing module comprises a conduction control signal output end, the switch valve comprises a conduction control signal receiving end, and the conduction control signal receiving end is electrically connected to the conduction control signal output end.

[0019] Before acquiring the digital pressure value of the gas discharged when the volume of the measuring device deforms, the method further comprises:

[0020] The switch valve is adjusted to be in a conduction state, so that the pressure in the measuring device is the same as the atmospheric pressure.

[0021] Optionally, after the switch valve is adjusted to be in a conduction state, so that the pressure in the measuring device is the same as the atmospheric pressure, the method further comprises: adjusting the switch valve to be in an off state.

[0022] Optionally, the pressure sensing module comprises at least one pressure sensing device, a processing device and a conversion display device; acquiring the digital pressure value of the gas discharged when the volume of the measuring device deforms comprises:

[0023] acquiring a first pressure value of the pressure sensing device; and determining the digital pressure value of the gas discharged when the volume of the measuring device deforms according to a difference between the first pressure value and an atmospheric pressure value.

[0024] Optionally, determining the clamping force of the head-mounted device according to the digital pressure value comprises:

[0025] determining the clamping force of the head-mounted device according to a pressure conversion formula and the digital pressure value; the pressure conversion formula is F=A·P2 ′ , wherein F is the clamping force received by the measuring device, A is the force application area of the clamping force, and P2 ′ is the digital pressure value converted from the analog voltage signal.

[0026] Optionally, the measuring module comprises a plurality of groups of measuring devices; after determining the clamping force of the head-mounted device according to the digital pressure value, the method further comprises:

[0027] determining an average value of the clamping force received at the positions of any two adjacent measuring devices according to the gas discharged by the two adjacent measuring devices; and determining continuous clamping force distribution information in the head-mounted device according to the average value.

[0028] Optionally, after determining the continuous clamping force distribution in the head-mounted device according to the average value, the method further comprises:

[0029] outputting the clamping force distribution information and prompting to adjust the clamping force at the position where the clamping force of the head-mounted device is lower than a preset clamping force.

[0030] Optionally, the pressure sensing module comprises a processing device and a conversion display device, the conversion display device is electrically connected with the processing device; the clamping force distribution information is outputted to prompt adjusting the clamping force in the head-mounted device which is lower than the preset clamping force position, comprising:

[0031] The clamping force distribution information is outputted to the conversion display device for the conversion display device to display the clamping force distribution information and prompt adjusting the clamping force in the head-mounted device which is lower than the preset clamping force position.

[0032] Optionally, the clamping force measuring system comprises a posture adjusting module; the posture adjusting module comprises a clamping force distribution information receiving end, the pressure sensing module comprises a clamping force distribution information output end, and the clamping force distribution information output end is electrically connected with the clamping force distribution information receiving end;

[0033] The clamping force distribution information is outputted to prompt adjusting the clamping force in the head-mounted device which is lower than the preset clamping force position, comprising:

[0034] The clamping force distribution information is outputted to the posture adjusting module to control the posture adjusting module to adjust the clamping force in the head-mounted device which is lower than the preset clamping force position.

[0035] The clamping force measuring system of the head-mounted device in the application comprises a pressure sensing module and a measuring module, the measuring module comprises at least one set of measuring devices and at least one air guide device, the measuring device comprises at least one hollow compressible unit, the measuring device is used for discharging gas when the volume is deformed, the first end of the air guide device is communicated with the measuring device, the second end of the air guide device is communicated with the pressure sensing module, and the air guide device is used for transmitting the gas to the pressure sensing module, and the pressure sensing module is used for determining the clamping force of the head-mounted device according to the pressure value of the gas, the measuring device comprises at least one hollow compressible unit in the above technical scheme, the gas is discharged through the first end of the air guide device when the volume is deformed, the second end of the air guide device is communicated with the pressure sensing module, and then the clamping force measuring system converts the volume change of the measuring device into pressure change, and the clamping force is determined through the pressure sensing module, compared with the scheme that part of the clamping force drives the connecting rod to move through the metal plane in the process of measuring the clamping force in the prior art, the loss of the extrusion force is caused, and the measurement result of the clamping force is more accurate. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is a structure block diagram of the clamping force measuring system of the head-mounted device provided by the embodiment of the application;

[0037] Figure 2 It is a distribution diagram of the measuring device provided by the embodiment of the application;

[0038] Figure 3is a distribution diagram of another measuring device provided by the embodiment of the present application;

[0039] Figure 4 is a specific structure diagram of a clamping force measuring system of a head-mounted device provided by the embodiment of the present application;

[0040] Figure 5 is a flow chart of a clamping force measuring method of a head-mounted device provided by the embodiment of the present application;

[0041] Figure 6 is a specific flow chart of a clamping force measuring method of a head-mounted device provided by the embodiment of the present application. DETAILED DESCRIPTION

[0042] In order to make the objects, technical solutions and advantages of the present application clearer, the following will combine the drawings in the embodiments of the present application, and through specific implementation manners, the technical solutions of the present application will be described completely. Obviously, the described embodiments are a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0043] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily have to include those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0044] Figure 1 is a structure block diagram of a clamping force measuring system of a head-mounted device provided by the embodiment of the present application, referring to Figure 1The clamping force measurement system of the head-mounted device includes a pressure sensing module 10 and a measurement module 20. The measurement module 10 includes at least one set of measuring devices 110 and at least one air guiding device 120. The measuring device 110 includes at least one hollow compressible unit. The measuring device 110 is used to deform its volume and discharge gas when squeezed. The first end 120a of the air guiding device 120 is connected to the measuring device 110, and the second end 120b of the air guiding device is connected to the pressure sensing module 20 for transmitting gas to the pressure sensing module 20. The pressure sensing module 20 is used to determine the clamping force of the head-mounted device based on the pressure value of the gas. In this embodiment, a clamping space is formed between the set of measuring devices 110, and the clamping space is configured to clamp the user's head.

[0045] Specifically, such as Figure 1 The measurement module 10 includes at least one set of measuring devices 110 and at least one air guiding device 120. The measuring device 110 includes at least one hollow compressible unit, and the air guiding device 120 can be an air guiding tube. During measurement, the hollow compressible unit is squeezed by the head-mounted device, causing the volume of the hollow compressible unit to deform. The gas inside is discharged into the air guiding device 120 through the first end 120a. The second end 120b of the air guiding device 120 is connected to the pressure sensing module 20. The clamping force measurement system of the head-mounted device utilizes the characteristic of the volume deformation caused by the compression of the gas inside the hollow compressible unit to connect the hollow compressible unit to the pressure sensing module 20 through the air guiding device 120, so that the volume change of the hollow compressible unit is converted into a pressure change. The pressure sensing module 20 determines the clamping force of the head-mounted device based on the pressure value of the compressed gas.

[0046] Furthermore, the pressure sensing module 20, connected to the second terminal 120b of the air guiding device 120, measures the first pressure value in the measuring device 110. After calculating the difference between the detected first pressure value in the measuring device 110 and the atmospheric pressure value, it outputs an analog voltage signal (the voltage range of the analog voltage signal can be 0V-5V). The pressure sensing module 20 then converts the output analog voltage signal into a digital pressure value and, according to its internally stored pressure conversion formula, substitutes the converted digital pressure value into the pressure conversion formula to determine the clamping force of the head-mounted device. The pressure conversion formula is F = A·P². ′ F is the clamping force on the measuring device, A is the area of ​​the clamping force, and P2 is the area of ​​the clamping force. ′ This is a digital pressure value converted from an analog voltage signal.

[0047] It can be understood that when the hollow compressible unit is extruded by the clamping force, the internal volume of the hollow compressible unit is reduced, and the gas discharged generates pressure. Since the hollow compressible unit is in communication with the pressure sensing module 20 through the gas guide device 120, that is, it can be considered that the measurement process is sealed, according to the gas pressure reference formula, the volume change of the hollow compressible unit can be converted into pressure change by the system, and the loss of extrusion force is small during the conversion process, so that the measurement result is more accurate. Wherein, the gas pressure reference formula is P1V1=P2V2, P1 is the pressure of the hollow compressible unit when it is not compressed, V1 is the volume of the hollow compressible unit when it is not compressed, P2 is the pressure of the hollow compressible unit after being compressed, and V2 is the volume of the hollow compressible unit after being compressed.

[0048] The clamping force measurement system in the embodiment of the application includes a pressure sensing module and a measurement module. The measurement module includes at least one set of measurement devices and at least one gas guide device. The measurement device includes at least one hollow compressible unit. The measurement device is used to discharge gas when the volume is deformed by extrusion. The first end of the gas guide device is in communication with the measurement device, and the second end of the gas guide device is in communication with the pressure sensing module and used to transmit gas to the pressure sensing module. The pressure sensing module is used to determine the clamping force of the head-mounted device according to the pressure value of the gas. In the above technical solution, the measurement device includes at least one hollow compressible unit. When extrusion occurs, the volume is deformed and the gas is discharged through the first end of the gas guide device. The second end of the gas guide device is in communication with the pressure sensing module. Then, the clamping force measurement system converts the volume change of the measurement device into pressure change and determines the clamping force through the pressure sensing module. Compared with the prior art, in the process of measuring the clamping force by the metal plane and the connecting rod, part of the clamping force moves the connecting rod through the metal plane, resulting in loss of extrusion force. Therefore, the measurement result of the clamping force is more accurate.

[0049] Optionally, Figure 2 is a distribution diagram of a measurement device provided by the embodiment of the application, referring to Figure 1 and Figure 2 The measurement module 10 includes multiple sets of measurement devices 110 and multiple gas guide devices 120. The gas guide device 120 corresponds to and communicates with the measurement device 110 one by one. The pressure sensing module 20 includes multiple connection interfaces 200. The gas guide device 120 is used to transmit the gas discharged by a set of measurement devices 110 to one connection interface 200.

[0050] For example, if the head-mounted device measured by the clamping force measurement system is a headset, the headset is fixed on both sides of the user's head and wraps the user's ears through the ear pads. In the prior art, the measurement system is usually arranged at the ear pad to measure the clamping force, for example, by measuring the clamping force through a metal plane and a connecting rod, fixing the headset behind the clamp, and making the ear pad close to the metal plane. The metal plane is connected to the pressure sensor through the connecting rod to measure the clamping force of the headset. However, this method can only measure the total clamping force applied to the ear pad, and cannot determine the clamping force distribution on the ear pad. When the clamping force distribution on the ear pad is uneven, i.e. part of the area has a smaller clamping force, the ear pad cannot be tightly attached to the user's skin, and part of the area has a gap, the sound emitted by the sound emitting unit leaks to the outside, causing distortion of the auditory sensation.

[0051] Therefore, in the embodiment of the present application, a plurality of sets of measuring devices 110 and a plurality of air guiding devices 120 are further provided. The air guiding device 120 corresponds to and communicates with the measuring device 110 one by one. The plurality of sets of measuring devices 110 can be located at different positions of the simulation device 30. The simulation device 30 can simulate the clamping position of the head-mounted device (for example, when the head-mounted device is a headset, the simulation device can simulate an ear, and the headset is clamped on the simulated ear). The pressure sensing module 20 includes a plurality of connection interfaces 200. The air guiding device 120 is used to transmit the gas discharged by a set of measuring devices 110 to a connection interface 200. In this way, the plurality of sets of measuring devices 110 communicate with the plurality of connection interfaces 200 in the pressure sensing module 20 through the plurality of air guiding devices 120, and the clamping force around the simulation device 30 can be measured respectively to obtain the clamping force distribution around the simulation device 30, which provides a basis for subsequent adjustment of the clamping force of the head-mounted device.

[0052] Referring to Figure 2 , the plurality of sets of measuring devices 110 are uniformly distributed along the circumferential direction. Specifically, the plurality of sets of measuring devices 110 are uniformly distributed around the simulation device 30, which can make the measured clamping force distribution around the simulation device 30 uniform, and thus the average value of the clamping force at the position of any two adjacent measuring devices determined according to the gas discharged by the two adjacent measuring devices is more accurate, and the continuous clamping force distribution information of the head-mounted device determined according to the average value is more accurate.

[0053] Figure 3 is another distribution diagram of the measuring device provided by the embodiment of the present application. Referring to Figure 3 , the measuring module 10 further includes a ring-shaped double-layer film 130. The ring-shaped double-layer film 130 is hollow and annular, and the measuring device 110 is arranged in the ring-shaped double-layer film 130. Specifically, as shown in Figure 3As shown, the annular double-layer film 130 surrounds the simulation device 30, and the simulation device 30 is located in the hollow region of the annular double-layer film 130, and then the measuring device 110 is fixed around the simulation device 30 by being arranged in the annular double-layer film 130, i.e. between the double-layer films of the annular double-layer film 130, so that the measuring device 110 is more stable and the installation method is simple, and the movement of the measuring device 110 during the clamping force measurement is prevented, so that the final measurement result has no error.

[0054] On the basis of the above-mentioned embodiments, referring to Figure 1 and Figure 3 , each group of measuring devices 110 includes a plurality of hollow compressible units 1101, the plurality of hollow compressible units 1101 are arranged in communication, and at least one hollow compressible unit 1101 is in communication with the air guide device 120. Specifically, each group of measuring devices 110 can be a hollow compressible unit matrix, i.e. each group of measuring devices 110 includes a plurality of hollow compressible units 1101, the plurality of hollow compressible units 1101 are arranged in communication, and at least one hollow compressible unit 1101 in the hollow compressible unit matrix is in communication with the air guide device 120, so that the pressure sensing module 20 can measure the pressure value of the hollow compressible unit matrix through the air guide device 120, and then measure the clamping force of the region where the hollow compressible unit matrix is located. Further, when each group of measuring devices 110 includes a plurality of hollow compressible units 1101, and the measuring device 110 is located in the annular double-layer film, the plurality of hollow compressible units 1101 are matrixed by using the annular double-layer film, and the measuring device 110 can be replaced or pasted by replacing or pasting the annular double-layer film as a whole, so that the installation method of the measuring device 110 is simple and more stable.

[0055] Figure 4 is a specific structure diagram of a clamping force measurement system of a head-mounted device provided by the embodiment of the present application, referring to Figure 4 , the pressure sensing module 20 includes at least one pressure sensing device 210 and a processing device 220, the pressure sensing device 210 is in communication with the second end 120b of the air guide device 120, for sensing the pressure of the gas, the processing device 220 is electrically connected with the pressure sensing device 210, for determining the clamping force of the head-mounted device according to the pressure. In addition, the pressure sensing module 20 further includes a conversion display device 230, the conversion display device 230 is electrically connected with the processing device 220, for converting the analog signal output by the processing device 220 into a digital signal, and displaying the clamping force determined by the processing device 220.

[0056] Specifically, the pressure sensing module 20 comprises at least one pressure sensing device 210, the pressure sensing device 210 is communicated with the second end 120b of the air guide device 120 through the connecting interface 200, the pressure of the measuring device 110 is detected through the pressure sensing device 210, and the first pressure value detected by the pressure sensing device 210 is differentially operated with the atmospheric pressure value through the processing device 220, and an analog voltage signal (the voltage range of the analog electric signal can be 0V-5V) is output to the conversion display device 230, the conversion display device 230 converts the analog voltage signal output by the processing device 220 into a digital signal, that is, a digital pressure value, and then transmits the digital pressure value to the processing device 220, the processing device 220 stores a pressure conversion formula, and then the processing device 220 determines the clamping force corresponding to the measuring device 110 according to the digital pressure value and the pressure conversion formula, and finally transmits the determined clamping force to the conversion display device 230, and the conversion display device 230 displays the clamping force corresponding to the measuring device 110. The pressure conversion formula is F=A·P2 ′ , F is the clamping force received by the measuring device, A is the force application area of the clamping force, and P2 ′ is the digital pressure value converted from the analog voltage signal.

[0057] It should be noted that when there are multiple sets of measuring devices 110, multiple air guide devices 120, and multiple pressure sensing devices 210, the conversion display device 230 can correspondingly display the clamping force received by the multiple measuring devices 110.

[0058] Optionally, continuing to refer to Figure 4 , the air guide device 120 further comprises a third end 120c and a switch valve 140, the switch valve 140 is arranged in the air path between the third end 120c and the atmospheric pressure, the pressure sensing module 20 comprises a conduction control signal output end 240, the switch valve 140 comprises a conduction control signal receiving end 141, and the conduction control signal receiving end 141 is electrically connected with the conduction control signal output end 240.

[0059] As Figure 4As shown, the air guide device 120 further comprises an on-off valve 140, which is arranged in an air path between the third end 120c and the atmospheric pressure, and is electrically connected with the pressure sensing module 20. Specifically, a conduction control signal receiving end 141 of the on-off valve 140 is electrically connected with the processing device 220 through the conduction control signal output end 240, so as to control the conduction and turn-off of the on-off valve 140 through the processing device 220. Normally, the on-off valve 140 is in a turn-off state, so as to ensure that the measuring device 110, the air guide device 120 and the pressure sensing device 210 are in a sealed state. After the measurement is completed, the measuring device 110 sends a conduction control signal to the conduction control signal receiving end 141 of the on-off valve 140 through the conduction control signal output end 240, so as to make the on-off valve 140 conduct according to the conduction control signal. Then, the measuring device 110 is in conduction with the outside atmosphere through the air guide device 120 and the on-off valve 140, so as to make the hollow compressible unit in the measuring device 110 return to the initial state, which is the volume of the hollow compressible unit when it is not compressed, so as to ensure that the clamping force measurement system of the head-mounted device can be repeatedly used.

[0060] On the basis of the above-mentioned embodiments, further referring to Figure 4 , the clamping force measurement system comprises a posture adjustment module 30, which comprises a clamping force distribution information receiving end 310, and the pressure sensing module 20 comprises a clamping force distribution information output end 250, which is electrically connected with the clamping force distribution information receiving end 310. The posture adjustment module 30 is used for adjusting the posture of the head-mounted device according to the clamping force distribution information.

[0061] Specifically, the pressure sensing module 20 comprises a processing device 220, which determines the clamping force of the head-mounted device according to the pressure conversion formula and the digital pressure value. When there is only one measuring device 110, the processing device 220 obtains the clamping force of the measuring device 110. When there are multiple measuring devices 110, the processing device 220 obtains the clamping force of the multiple measuring devices 110. Then, the processing device 220 inputs the clamping force distribution information to the clamping force distribution information receiving end 310 of the posture adjustment module 30 through the clamping force distribution information output end 250. The clamping force distribution information is the clamping force of the above-mentioned one measuring device or the clamping force of the multiple measuring devices. After receiving the clamping force distribution information, the posture adjustment module 30 compares each clamping force in the clamping force distribution information with a preset clamping force, determines the positions of the measuring devices whose clamping force is less than the preset clamping force, and adjusts the posture of the head-mounted device through the posture adjustment module 30, so as to increase the clamping force of the head-mounted device corresponding to the positions of the measuring devices whose clamping force is less than the preset clamping force, and improve the user experience.

[0062] Optionally, based on the above embodiment, the measuring device 110 includes silica gel balls, i.e. the hollow compressible unit can be but is not limited to silica gel balls or a compressible air bag. In this embodiment, silica gel balls are taken as an example. Since silica gel balls have a certain resilience in addition to the hollow compressible characteristic, when the measuring device 110 is controlled by the processing device 220 to open the on-off valve 140 to make the measuring device 110 communicate with the outside atmosphere through the air guide device 120 and the on-off valve 140, the silica gel balls can restore the original volume by using the resilience, without the need for additional devices such as air pumps to restore the measuring device 110 to the initial state, so that the restoring mode of the measuring device 110 is simple.

[0063] Based on the same inventive concept, the application also provides a clamping force measurement method of a head-mounted device, applied to the clamping force measurement system of the head-mounted device, Figure 5 is a flowchart of a clamping force measurement method of a head-mounted device provided by the application, as Figure 5 shown, the dynamic pressure simulation test method comprises:

[0064] S110, obtaining a digital pressure value of the gas discharged when the volume of the measuring device is deformed.

[0065] First, the measuring device is fixed at a position where the clamping force needs to be measured, and then the head-mounted device is arranged on the measuring device. The measuring device includes at least one hollow compressible unit. Under the extrusion of the head-mounted device, the at least one hollow compressible unit is deformed. By using the characteristic that the volume of the gas in the hollow compressible unit changes due to compression, the volume change of the hollow compressible unit is converted into a pressure change through the air guide device, and then a first pressure value of the gas discharged when the volume of the measuring device is deformed is obtained by the pressure sensing module. The pressure sensing module performs a difference operation on the first pressure value of the gas discharged when the volume of the measuring device is deformed and the pressure value of the standard atmospheric pressure, and outputs an analog voltage signal (the voltage range of the analog voltage signal can be 0V-5V). Then, the pressure sensing module converts the output analog voltage signal into a digital pressure value.

[0066] S120, determining the clamping force of the head-mounted device according to the digital pressure value.

[0067] The pressure sensing module stores a pressure conversion formula. After obtaining the digital pressure value, the digital pressure value converted from the analog voltage signal is substituted into the pressure conversion formula, and then the clamping force of the head-mounted device is determined. The pressure conversion formula is F=A·P2 ′ , F is the clamping force received by the measuring device, A is the force application area of the clamping force, and P2 ′ is the digital pressure value converted from the analog voltage signal.

[0068] In the embodiment of the present application, the pressure value of the gas discharged when the volume of the measuring device is deformed is obtained, and the clamping force of the head-mounted device is determined according to the pressure value, and when extrusion occurs, the volume of the measuring device is deformed and the gas is discharged through the first end of the gas guide device, the second end of the gas guide device is in communication with the pressure sensing module, so that the clamping force measuring system converts the volume change of the measuring device into a pressure change, and the clamping force is determined through the pressure sensing module. Compared with the prior art, in the process of measuring the clamping force through the metal plane and the connecting rod, part of the clamping force drives the connecting rod to move through the metal plane, resulting in loss of extrusion force, so that the measurement result of the clamping force is more accurate.

[0069] On the basis of the above embodiment, Figure 6 is a specific flow chart of a head-mounted device clamping force measurement method provided by the embodiment of the present application, as Figure 6 The specific working process of the head-mounted device clamping force measurement method is as follows:

[0070] S210, determine the actual clamping force of the head-mounted device under the preset clamping force, determine the correction parameter of the clamping force measurement system according to the preset clamping force and the actual clamping force, and correct the clamping force measurement system according to the correction parameter.

[0071] Specifically, the measuring device will be deformed under the action of the extrusion force, and then the first pressure value of the measuring device is measured through the pressure sensing device, and the first pressure value detected by the pressure sensing device is subjected to difference operation with the atmospheric pressure value through the processing device, and an analog voltage signal is output. In order to prevent the analog voltage signal output by the processing device from having errors, resulting in errors between the actual extrusion force measured finally and the extrusion force provided by the head-mounted device, a plurality of preset clamping forces are set, for example, the preset clamping forces of the measuring device are set to 10N, 50N, 100N, etc. Then the measuring device is extruded by the preset clamping force, and the actual clamping force received at the position of the measuring device is measured by the pressure conversion formula stored by the processing device. The processing device compares the measured actual clamping force with the preset clamping force, if the difference between the measured actual clamping force and the preset clamping force is greater than the set value, the measuring device is corrected by the processing device; if the difference between the measured actual clamping force and the preset clamping force is less than the set value, it means that the measuring device does not need to be corrected, the error is within the acceptable range, and the measurement can continue to improve the accuracy of the measurement result.

[0072] S220, adjust the switch valve to be in a conducting state.

[0073] Specifically, after the measurement device is corrected, the measurement device needs to be adjusted to an initial state, that is, the switch valve is adjusted to an open state by the processing device, so that the pressure in the measurement device is the same as the atmospheric pressure, to avoid the influence of the previous measurement on the subsequent measurement.

[0074] S230, adjust the switch valve to a closed state.

[0075] After adjusting the measurement device to the initial state, in order to ensure that the measurement device, the air guide device and the pressure sensing device are in a sealed state, the switch valve also needs to be adjusted to a closed state by the processing device to avoid affecting the subsequent measurement steps.

[0076] S240, obtain a first pressure value of the pressure sensing device, and determine a digital pressure value of the gas discharged when the volume of the measurement device is deformed according to the difference between the first pressure value and the atmospheric pressure value.

[0077] Specifically, the pressure sensing module includes at least one pressure sensing device, a processing device and a conversion display device. Then, the first pressure value of the gas discharged when the volume of the measurement device is deformed is obtained by the pressure sensing device, the processing device performs difference operation on the first pressure value of the gas discharged when the volume of the measurement device is deformed and the atmospheric pressure value, and outputs an analog voltage signal (the voltage range of the analog voltage signal can be 0V-5V). Then, the conversion display device converts the output analog voltage signal into a digital pressure value. In addition, the digital pressure values of the gases discharged when the volumes of multiple measurement devices are deformed can be obtained by multiple pressure sensing devices in the pressure sensing module. Among them, the multiple measurement devices can be uniformly distributed around the simulation device to measure the extrusion force distribution of the head-mounted device.

[0078] S250, determine the clamping force of the head-mounted device according to the pressure conversion formula and the digital pressure value.

[0079] The pressure conversion formula is stored in the pressure sensing module. After obtaining the digital pressure value, the digital pressure value converted from the analog voltage signal is substituted into the pressure conversion formula, and then the clamping force of the head-mounted device is determined, and the clamping force of the corresponding measurement device is displayed by the conversion display device. Among them, the pressure conversion formula is F=A·P2 ′ , F is the clamping force received by the measurement device, A is the force application area of the clamping force, and P2 ′ is the digital pressure value converted from the analog voltage signal. In addition, when there are multiple groups of measurement devices, the clamping forces received by the measurement devices at multiple positions can also be calculated by the processing device, and the clamping forces received by the measurement devices at multiple positions are displayed correspondingly by the conversion display device.

[0080] S260, determining the average value of the clamping force at the positions of any two adjacent measuring devices according to the gas discharged by the two adjacent measuring devices, and determining the continuous clamping force distribution information in the head-mounted device according to the average value.

[0081] Specifically, the measuring module includes multiple groups of measuring devices. The clamping force measured by the measuring devices at multiple positions should be continuously distributed. However, in practice, even if the positions of the measuring devices are arranged densely, the measured clamping force distribution is still relatively dispersed due to the volume limitation of the measuring devices. Therefore, after the clamping force of the measuring devices at multiple positions is measured by the clamping force measuring system of the head-mounted device, the average value of the clamping force measured by any two adjacent measuring devices can be taken as the clamping force of the region between the positions of the two adjacent measuring devices, so that the continuous clamping force distribution information can be obtained without the need to adjust the positions of the measuring devices for measurement.

[0082] S270, outputting the clamping force distribution information and prompting to adjust the clamping force at the positions in the head-mounted device where the clamping force is lower than the preset clamping force.

[0083] The pressure sensing module further includes a conversion display device electrically connected with the processing device. The clamping force distribution information can be outputted to the conversion display device for displaying the clamping force distribution information and prompting to adjust the clamping force at the positions in the head-mounted device where the clamping force is lower than the preset clamping force. Specifically, after the processing device determines the clamping force of the head-mounted device by the pressure conversion formula and the digital pressure values corresponding to the multiple measuring devices, and determines the average value of the clamping force at the positions of any two adjacent measuring devices according to the gas discharged by the two adjacent measuring devices, and determines the continuous clamping force distribution information in the head-mounted device according to the average value, the processing device sends the clamping force distribution information to the conversion display module. The conversion display device displays the clamping force distribution information and marks and prompts the positions in the clamping force distribution information corresponding to the head-mounted device where the clamping force is lower than the preset clamping force, so as to facilitate subsequent adjustment of the clamping force at the relevant positions by the staff.

[0084] Alternatively, the clamping force measurement system comprises a posture adjustment module, the posture adjustment module comprises a clamping force distribution information receiving end, the pressure sensing module comprises a clamping force distribution information output end, and the clamping force distribution information output end is electrically connected with the clamping force distribution information receiving end. The clamping force distribution information output end can output the clamping force distribution information to the posture adjustment module to control the posture adjustment module to adjust the clamping force at the position where the clamping force in the head-mounted device is lower than the preset clamping force. That is, the processing device outputs the clamping force distribution information to the posture adjustment module, the posture adjustment module compares each clamping force in the clamping force distribution information with the preset clamping force, determines the position of the measurement device whose clamping force is lower than the preset clamping force in each group of measurement devices, that is, determines the position where the clamping force in the head-mounted device corresponding to the clamping force distribution information is lower than the preset clamping force, and adjusts the posture of the head-mounted device to increase the clamping force at the position where the measurement device corresponding to the clamping force distribution information in the head-mounted device is lower than the preset clamping force, thereby improving the user experience.

[0085] In the embodiment of the present application, the digital pressure value of the exhaust gas when the volume of the measurement device is deformed is obtained, and then the digital pressure values of a plurality of measurement devices uniformly distributed along the circumference are obtained, and the clamping force distribution of the head-mounted device is determined according to the digital pressure values of the plurality of measurement devices. The clamping force distribution is adjusted to make the clamping force distribution of the head-mounted device uniform, thereby improving the comfort and hearing experience of the user. In addition, before measurement, the processing device compares the measured clamping force with the set clamping force, and corrects the measurement device according to the difference after comparison, thereby further improving the accuracy of measurement. Moreover, the average value of the clamping forces measured by the adjacent two measurement devices is taken as the clamping force of the region between the positions of the adjacent two measurement devices, so that the continuous clamping force distribution is obtained, and the continuous clamping force distribution is obtained in a simple manner.

[0086] It should be noted that the above are only the preferred embodiments of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, readjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A headgear clamp force measurement system, characterized by, The pressure sensing module and the measuring module are included. The measuring module includes at least one set of measuring devices and at least one air guiding device. The measuring device includes at least one hollow compressible unit, and the measuring device is used to discharge gas when the volume is deformed under extrusion. The first end of the air guiding device is in communication with the measuring device, and the second end of the air guiding device is in communication with the pressure sensing module, which is used to transmit the gas to the pressure sensing module. The pressure sensing module is used to determine the clamping force of the head-mounted device according to the pressure value of the gas. Wherein, the clamping space is formed between the set of measuring devices, and the clamping space is configured to be clamped to the head.

2. The clamp force measurement system of claim 1, wherein, The measuring module includes multiple sets of measuring devices and multiple air guiding devices, and the air guiding devices correspond to the measuring devices one by one and are in communication. The pressure sensing module includes multiple connection interfaces, and the air guiding device is used to transmit the gas discharged by a set of measuring devices to one connection interface.

3. The clamp force measurement system of claim 2, wherein, Multiple sets of measuring devices are uniformly distributed in the circumferential direction.

4. The clamp force measurement system of claim 1, wherein, The measuring module further includes an annular double-layer film. The annular double-layer film is a hollow ring, and the measuring device is arranged in the annular double-layer film.

5. The clamp force measurement system of claim 1, wherein, Each set of measuring devices is a hollow compressible unit matrix, and each set of measuring devices includes multiple hollow compressible units. Multiple hollow compressible units are in communication, and at least one hollow compressible unit is in communication with the air guiding device.

6. The clamp force measurement system of any of claims 1-5, wherein, The pressure sensing module includes at least one pressure sensing device and a processing device. The pressure sensing device is in communication with the second end of the air guiding device, and is used to sense the pressure of the gas. The processing device is electrically connected with the pressure sensing device, and is used to determine the clamping force of the head-mounted device according to the pressure.

7. The clamp force measurement system of claim 6, wherein, The pressure sensing module further includes a conversion display device. The conversion display device is electrically connected with the processing device, and is used to convert the analog signal output by the processing device into a digital signal, and display the clamping force determined by the processing device.

8. The force measurement system of any one of claims 1-5, wherein, The air guiding device further includes a third end and a switch valve, and the switch valve is arranged in the air path between the third end and the atmospheric pressure. The pressure sensing module includes a conduction control signal output end, the switch valve includes a conduction control signal receiving end, and the conduction control signal receiving end is electrically connected with the conduction control signal output end.

9. The clamp force measurement system of any of claims 1-5, wherein, The clamping force measuring system includes a posture adjusting module. The posture adjusting module includes a clamping force distribution information receiving end, the pressure sensing module includes a clamping force distribution information output end, the clamping force distribution information output end is electrically connected with the clamping force distribution information receiving end, and the posture adjusting module is used to adjust the posture of the head-mounted device according to the clamping force distribution information.

10. A head-mounted device clamping force measurement method applied to the head-mounted device clamping force measurement system of any one of claims 1-9, characterized in that, The clamping force measuring method includes: Obtaining the digital pressure value of the gas discharged when the volume of the measuring device is deformed; Determining the clamping force of the head-mounted device according to the digital pressure value.

11. The clamp force measurement method of claim 10, wherein, Before obtaining the digital pressure value of the gas discharged when the volume of the measuring device is deformed, it further includes: Determining the actual clamping force of the head-mounted device under the preset clamping force; Determine a correction parameter of the clamping force measurement system according to the preset clamping force and the actual clamping force; Correct the clamping force measurement system according to the correction parameter.

12. The clamp force measurement method of claim 10, wherein, The air guide device further comprises a third end and a switch valve, the switch valve being arranged in an air path between the third end and atmospheric pressure; the pressure sensing module comprises a conduction control signal output end, the switch valve comprises a conduction control signal receiving end, and the conduction control signal receiving end is electrically connected with the conduction control signal output end; Before the digital pressure value of the gas discharged when the volume of the measuring device is deformed is obtained, the method further comprises: Adjusting the switch valve to be in a conduction state so that the pressure in the measuring device is the same as the atmospheric pressure.

13. The clamp force measurement method of claim 12, wherein, After the switch valve is adjusted to be in a conduction state so that the pressure in the measuring device is the same as the atmospheric pressure, the method further comprises: Adjusting the switch valve to be in an off state.

14. The clamp force measurement method of claim 10, wherein, The pressure sensing module comprises at least one pressure sensing device, a processing device and a conversion display device; The digital pressure value of the gas discharged when the volume of the measuring device is deformed is obtained by: Obtaining a first pressure value of the pressure sensing device; and determining the digital pressure value of the gas discharged when the volume of the measuring device is deformed according to a difference between the first pressure value and an atmospheric pressure value.

15. The clamp force measurement method of claim 10, wherein, The clamping force of the head-mounted device is determined according to the digital pressure value by: Determining the clamping force of the head-mounted device according to a pressure conversion formula and the digital pressure value; The pressure conversion formula is F = A·P2 ′ where F is the clamping force received by the measuring device, A is the force application area of the clamping force, and P2 ′ is the digital pressure value converted from the analog voltage signal.

16. The clamp force measurement method of claim 10, wherein, The measuring module comprises a plurality of measuring devices; after the clamping force of the head-mounted device is determined according to the digital pressure value, the method further comprises: Determining an average value of the clamping force at a position where any two adjacent measuring devices are located according to the gas discharged by the two adjacent measuring devices; Determining continuous clamping force distribution information in the head-mounted device according to the average value.

17. The clamp force measurement method of claim 16, wherein, After the continuous clamping force distribution in the head-mounted device is determined according to the average value, the method further comprises: Outputting the clamping force distribution information to prompt adjustment of the clamping force at a position where the clamping force in the head-mounted device is lower than a preset clamping force.

18. The clamp force measurement method of claim 17, wherein, The pressure sensing module comprises a processing device and a conversion display device, and the conversion display device is electrically connected with the processing device; Outputting the clamping force distribution information to prompt adjustment of the clamping force at a position where the clamping force in the head-mounted device is lower than a preset clamping force comprises: Outputting the clamping force distribution information to the conversion display device so that the conversion display device displays the clamping force distribution information and prompts adjustment of the clamping force at a position where the clamping force in the head-mounted device is lower than a preset clamping force.

19. The clamp force measurement method of claim 17, wherein, The clamping force measurement system comprises a posture adjustment module; the posture adjustment module comprises a clamping force distribution information receiving end, the pressure sensing module comprises a clamping force distribution information output end, and the clamping force distribution information output end is electrically connected with the clamping force distribution information receiving end; Outputting the clamping force distribution information to prompt adjustment of the clamping force at a position where the clamping force in the head-mounted device is lower than a preset clamping force comprises: outputting the clamping force distribution information to the posture adjustment module to control the posture adjustment module to adjust the clamping force at the position where the clamping force in the head-mounted device is lower than the preset clamping force.

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