Wearable visual impairment assisting device

Abstract

The invention relates to the technical field of visual impairment assisting devices, and discloses a wearable visual impairment assisting device, which comprises a distance measuring module, a visual impairment assisting module and a visual impairment assisting module, the processing module is used for generating a driving signal corresponding to the distance according to the distance between the object and the wearer; the execution module is used for receiving the driving signal and executing a prompt action corresponding to the driving signal; the wearing component is used for being worn by a wearer, and the processing module is arranged on the wearing component; the distance measuring module and / or the execution module are / is connected with the processing module through the flexible stretchable circuit, and compared with a rigid visual impairment assisting device in the prior art, the flexible stretchable circuit is beneficial to improving the conformity of the device, so that the visual impairment assisting effect is improved, and the foreign body sensation of a wearer is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vision impairment assistance devices, and particularly to a wearable vision impairment assistance device. Background Art

[0002] Artificial intelligence-driven wearable electronic systems offer promising solutions for non-invasive visual assistance. For example, wearable vision impairment assistance devices sense the environment through various sensors and convey information to visually impaired individuals in a non-visual manner to help them cope with challenges in daily life. However, existing wearable vision impairment assistance devices are mostly rigid devices that use rigid electronic components such as fixed vibration motors or cameras. There are problems such as the inability to maintain a proper fit on the human body, resulting in abnormal vision impairment assistance functions, and a strong sense of foreign body when wearing the rigid device. Summary of the Invention

[0003] The purpose of the present invention is to provide a wearable vision impairment assistance device to enhance the vision impairment assistance effect and reduce the sense of foreign body of the wearer.

[0004] To achieve the above purpose, the present invention provides the following solutions:

[0005] A wearable vision impairment assistance device includes:

[0006] A ranging module: used to measure the distance between an object and the wearer;

[0007] A processing module: used to generate a driving signal corresponding to the distance according to the distance between the object and the wearer;

[0008] An execution module: used to receive the driving signal and execute the prompting action corresponding to the driving signal;

[0009] A wearing member: used for the wearer to wear, and the processing module is arranged on the wearing member;

[0010] The ranging module and / or the execution module are connected to the processing module through a flexible and stretchable circuit.

[0011] Preferably, the flexible and stretchable circuit includes a PDMS base layer, a nano-conductive silver paste wire layer, and a PDMS covering layer arranged in sequence from bottom to top.

[0012] Preferably, the nano-conductive silver paste wire layer is printed on the PDMS base layer.

[0013] Preferably, the ranging module is used to be fixed on the back of the wearer's finger.

[0014] Preferably, when only the ranging module and the processing module are connected through the flexible stretchable circuit, the wearable member is a wristband, a PCB board is arranged on the wristband, and both the processing module and the execution module are arranged on the PCB board.

[0015] Preferably, the execution module includes: an elastic connecting piece, a metal coil and a permanent magnet;

[0016] Wherein, one end of the elastic connecting piece is electrically connected to the processing module, the other end of the elastic connecting piece is electrically connected to the metal coil, the permanent magnet is arranged on the PCB board, and the metal coil corresponds to the position of the permanent magnet.

[0017] Preferably, the elastic connecting piece is a PET connecting piece.

[0018] Preferably, the wearable visual impairment assistance device further includes a gasket, and the gasket is arranged on the wristband.

[0019] Preferably, the ranging module is a time-of-flight sensor.

[0020] Preferably, the drive signal is a pulse signal, and the generation process of the pulse signal includes:

[0021] Generating a drive current according to the distance between the object and the wearer;

[0022] The calculation formula between the drive current and the distance is:

[0023]

[0024] Where I(d) is the drive current, and d is the distance between the object and the wearer;

[0025] I max is the maximum value of the drive current, and k is a constant controlling the attenuation rate;

[0027] d thrd is the distance threshold;

[0028] Generating the pulse signal according to the drive current.

[0029] According to the description of the above solution, the present invention discloses the following technical effects: Through the ranging module, the distance between the object and the wearer is measured. Through the processing module, a driving signal is generated according to the distance between the object and the wearer. Through the execution module, the driving signal is received and corresponding actions are executed to prompt the wearer whether to avoid obstacles; moreover, the ranging module and / or the execution module are connected to the processing module through a flexible and stretchable circuit. Compared with the rigid visual impairment assistance device in the prior art, the flexible and stretchable circuit is beneficial to improving the fitting feeling of the device, thereby improving the visual impairment assistance effect and reducing the foreign body sensation of the wearer. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 Schematic diagram of the wearable visual impairment assistance device provided by the embodiment of the present invention;

[0032] Wherein, 1 - ranging module; 2 - flexible and stretchable circuit; 3 - wristband; 3.1 - battery; 3.2 - execution module; 3.3 - processing module; 3.4 - gasket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0034] As Figure 1As shown in the figure, an embodiment of the present specification provides a wearable vision impairment assistance device, including: a ranging module 1 for measuring the distance between an object and the wearer; a processing module 3.3 for generating a driving signal corresponding to the distance according to the distance between the object and the wearer; an execution module 3.2 for receiving the driving signal and performing a prompting action corresponding to the driving signal; a wearable member for the wearer to wear, and the processing module 3.3 is arranged on the wearable member; the ranging module and / or the execution module 3.2 are connected to the processing module 3.3 through a flexible stretchable circuit 2. By connecting one or more modules of the device through the flexible stretchable circuit 2, compared with the rigid connection between multiple modules in the prior art, it is beneficial to improve the fit of the device, reduce the gap between the device and the wearing part, thereby being beneficial to improving the accuracy of ranging and ensuring that the prompting action can reach the wearing part, and enhancing the vision impairment assistance effect.

[0035] The flexible stretchable circuit 2 includes a PDMS base layer, a nano-conductive silver paste wire layer, and a PDMS covering layer arranged in sequence from bottom to top. Among them, the nano-silver paste conductive layer can be a type of compound conductive layer, and this type of compound is well-known to those skilled in the art and will not be listed one by one here. The molecular formulas of this type of compound are similar, but the stretchability is different. Therefore, those skilled in the art can select according to the required tensile strength. In the embodiment of the present specification, the stretchable length of the selected nano-silver paste conductive layer is 17% of its own length. The PDMS base layer is formed by evenly applying a PDMS solution on a flat glass plate and heating and curing it. The PDMS covering layer and the PDMS base layer are used to protect the nano-conductive silver paste wire layer.

[0036] The nano-conductive silver paste wire layer is preferably printed on the PDMS base layer by a printer, and the number of nano-conductive silver paste wires can be set according to actual needs. In the embodiment of the present specification, the number of nano-conductive silver paste wires is 6, because the minimum number of independent wires required for the time-of-flight sensor and the processor is 6.

[0037] The ranging module is preferably used to be fixed on the back of the wearer's finger. The reason why the ranging module is arranged on the back of the finger is that the finger has a higher degree of freedom compared to other parts of the wearer's body, and most of the wearer's interaction activities are completed through the hand. Of course, the setting position of the ranging module can also be selected according to the actual use needs of the wearer.

[0038] The driving signal is preferably a pulse signal, and the generation process of the pulse signal includes:

[0039] Generating a driving current according to the distance between the object and the wearer;

[0040] The calculation formula between the driving current and the distance is:

[0041]

[0042] Among them, I(d) is the driving current, and d is the distance between the object and the wearer;

[0043] I max is the maximum value of the driving current, which is restricted by the output power of the processing module 3.3. In the embodiments of this specification, it is stipulated to use the maximum output power of the processing module 3.3. k is a constant for controlling the attenuation rate and is set according to the actual situation. In the embodiments of this specification, k is set to -0.05;

[0045] d thrd is the distance threshold, which refers to the maximum distance between the object corresponding to the action of the execution module and the wearer, and is set according to actual needs. The recommended value is 25 cm;

[0046] A pulse signal is generated according to the driving current. In the embodiments of this specification, when the distance is greater than 25 cm, almost no driving current is generated; when the distance is less than 25 cm, the magnitude of the generated driving current is calculated by the above formula.

[0047] Only when the ranging module and the processing module 3.3 are connected by the flexible and stretchable circuit 2, the wearing member is the wristband 3. A PCB board is provided on the wristband 3. The PCB board is preferably made of flexible PET material. Both the processing module 3.3 and the execution module 3.2 are provided on the PCB board.

[0048] The execution module 3.2 includes: an elastic connecting piece, a metal coil and a permanent magnet; the metal coil is preferably a copper coil with a relatively high cost performance. The sizes and shapes of the metal coil and the permanent magnet can be set according to actual needs. In the embodiments of this specification, both the metal coil and the permanent magnet are circular with a diameter of 5 mm, and the thickness of the permanent magnet is 0.5 mm.

[0049] Among them, one end of the elastic connecting piece is electrically connected to the processing module 3.3, the other end of the elastic connecting piece is electrically connected to the metal coil, the permanent magnet is arranged on the PCB board, and the positions of the metal coil and the permanent magnet correspond. The processing module 3.3 generates a driving current according to the distance, and then outputs different pulse signals according to the magnitude of the driving current. For example, when the driving current is 0, a full low level is output. When the driving current is non-zero, a PWM signal with a duty cycle of P is output according to the ratio P of the driving current to the maximum value of the driving current. By changing the duty cycle P, the effective voltage of the execution module 3.2 is changed, so as to realize the control of the metal coil. When the driving current is 0, the metal coil does not move, and the metal coil is pressed against the permanent magnet under the elastic force of the elastic connecting piece. When the driving current is non-zero, after the metal coil is energized, a magnetic field opposite to that of the permanent magnet is generated, and it will move in the direction opposite to the permanent magnet, thereby hitting the wearing part to remind the wearer.

[0050] The elastic connector is preferably a PET connector, and elastic connectors made of other materials widely used in the prior art can also be selected. The shape of the elastic connector is preferably strip-shaped.

[0051] The wearable visual impairment assistance device further includes a gasket 3.4, which is arranged on the wristband 3. Such an arrangement can ensure that there is a gap between the wristband 3 and the wearing part, which is conducive to air circulation, improves the wearing comfort, and also ensures the space for the operation of the execution module 3.2.

[0052] The ranging module 1 is preferably a time-of-flight sensor, and other ranging sensors widely used in the prior art can also be used.

[0053] The above-mentioned device further includes a battery 3.1 for supplying electrical energy to the entire device.

[0054] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. For the system disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0055] In this article, specific examples are used to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A wearable visual impairment assistive device, characterized in that: include: Distance measurement module: used to measure the distance between the object and the wearer; Processing module: used for generating a driving signal corresponding to the distance between the object and the wearer according to the distance between the object and the wearer; Execution module: used for receiving the driving signal and executing the prompt action corresponding to the driving signal; Wearing component: used for being worn by the wearer, and the processing module is arranged on the wearing component; The distance measuring module and / or the execution module are connected to the processing module via a flexible stretchable circuit.

2. The wearable visual impairment assistive device according to claim 1, characterized in that: The flexible stretchable circuit comprises a PDMS base layer, a nano-conductive silver paste wire layer and a PDMS covering layer which are arranged in sequence from bottom to top.

3. The wearable visual impairment assistive device according to claim 2, characterized in that: The nano-conductive silver paste wire layer is printed on the PDMS base layer.

4. The wearable visual impairment assistive device according to claim 1, characterized in that: The distance measuring module is used to be fixed on the back of the wearer's finger.

5. The wearable visual impairment assistive device according to claim 1, characterized in that: When only the ranging module is connected to the processing module through the flexible stretchable circuit, the wearable component is a wristband, a PCB board is provided on the wristband, and the processing module and the execution module are both provided on the PCB board.

6. The wearable visual impairment assistive device according to claim 5, characterized in that: The execution module includes: an elastic connecting member, a metal coil and a permanent magnet; Among them, one end of the elastic connector is electrically connected to the processing module, and the other end of the elastic connector is electrically connected to the metal coil. The permanent magnet is arranged on the PCB board, and the metal coil corresponds to the position of the permanent magnet.

7. The wearable visual impairment assistive device according to claim 6, characterized in that: The elastic connecting piece is a PET connecting piece.

8. The wearable visual impairment assistive device according to claim 6, characterized in that: The wearable visual impairment assistive device also includes a gasket, which is arranged on the wristband.

9. The wearable visual impairment assistive device according to claim 1, characterized in that: The distance measurement module is a time-of-flight sensor.

10. The wearable visual impairment assistive device according to claim 1, characterized in that: The driving signal is a pulse signal, and the generation process of the pulse signal includes: generating a driving current according to the distance between the object and the wearer; The calculation formula between the driving current and the distance is: Where, I(d) is the driving current, and d is the distance between the object and the wearer; I max is the maximum value of the driving current, and k is a constant for controlling the decay rate; d thrd is the distance threshold; The pulse signal is generated according to the driving current.

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