CN105496741A - Pathfinding walking stick for the blind - Google Patents

Abstract

The invention discloses a crutch for blind persons capable of exploring the road, comprising: a telescopic rod; an armrest, which is arranged on the upper end of the telescopic rod, and an ultrasonic sensor is arranged at the front end of the armrest, and the ultrasonic sensor is used to sense whether there is an obstacle ahead thing; a leg, which is located at the bottom of the telescopic rod, is used to support the telescopic rod, and the leg is provided with a color sensor, and the color sensor is used to sense whether the road is a blind road; a button, which is located on the armrest , the button is connected with the ultrasonic sensor and the color sensor respectively; when the button is pressed, the two sensors start sensing; an alarm device; and a control platform, which is connected with the button, so that when the ultrasonic sensor The control platform controls the alarm device to give an alarm when sensing an obstacle ahead or when the color sensor senses that the road is not a blind road. The crutch has the advantages of high reliability, wide detection range, high sensitivity and the like.

Description

A walking stick for the blind

technical field

The invention relates to the field of barrier-free assistive devices, in particular to a blind crutch capable of exploring paths.

Background technique

Crutches for the blind are the most widely used barrier-free devices for the blind. The blind use it to perceive obstacles and road conditions ahead. However, the defects of the old-style crutch design often cannot meet the needs of the blind, and they still face the difficult dilemma of traveling.

Although the optical crutches for the blind appearing on the market today combine optical elements and sensors, it facilitates the travel of the blind group to a certain extent and improves the comfort and convenience of travel. However, due to the limitations of light sensing and transmission of optical components, crutches often cannot accurately detect the position of distant objects and the flatness of the ground, which also causes confusion for the blind to a certain extent. At the same time, optical crutches do not have the tactile experience brought by physical crutches, which also limits the trust of the blind to some extent.

The information disclosed in this Background section is only for enhancing the understanding of the general background of the present invention and should not be taken as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled in the art.

Contents of the invention

The object of the present invention is to provide a crutch for the blind that can detect the way, and the crutch has the advantages of high reliability, wide detection range and high sensitivity.

In order to achieve the above object, the present invention provides a crutch for the blind that can explore the way, including: a telescopic rod; an armrest, which is arranged on the upper end of the telescopic rod, and an ultrasonic sensor is provided at the front end of the armrest, and the ultrasonic sensor is used for Sensing whether there is an obstacle in front; the leg, which is arranged at the bottom end of the telescopic rod, is used to support the telescopic rod, and the leg is provided with a color sensor, and the color sensor is used to sense whether the road is a blind road; the button, which is set On the armrest, the button is respectively connected with the ultrasonic sensor and the color sensor; when the button is pressed, the two sensors start sensing; an alarm device; and a control platform, which is respectively connected with the alarm device and the color sensor. The button is connected so that when the ultrasonic sensor senses an obstacle ahead or the color sensor senses that the road is not a blind road, the control platform controls the alarm device to give an alarm.

Preferably, in the above technical solution, the legs are triangular legs.

Preferably, in the above technical solution, a rubber pad is provided on the bottom of the tripod leg.

Preferably, in the above technical solution, the alarm device is a horn.

Preferably, in the above technical solution, the telescopic rod includes an upper telescopic rod, a lower telescopic rod socketed on the upper telescopic rod, and a knob for positioning the upper telescopic rod.

Compared with the prior art, the present invention has the following beneficial effects:

1. Compared with the traditional crutches for the blind, the present invention has a perception prompt system composed of ultrasonic sensors, color sensors and alarm devices, which can perceive obstacles and road conditions, and issue prompts in time, and can perceive obstacles and blind roads from multiple angles and directions Position, so that the practicality of crutches is greatly improved.

2. Compared with the optical crutches on the market, the present invention has a poorer ability to perceive the ground, and a color sensor is added at the bottom of the crutches to sense the color-blind warning roads on the ground and issue prompts in time.

Description of drawings

Fig. 1 is a structural schematic diagram of a crutch for the blind capable of finding a way according to the present invention.

Fig. 2 is a schematic view of the use of the crutches for blind persons capable of finding ways according to the present invention.

Explanation of main reference signs:

1-armrest, 2-alarm device, 3-foot, 4-rubber pad, 5-up telescopic rod, 6-bottom telescopic rod, 7-knob, 8-signal line, 9-color sensor, 10-button, 11- Ultrasonic sensor, 12-blind road bump.

detailed description

The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.

Fig. 1 to Fig. 2 show the schematic structural diagrams of a crutch for the blind according to a preferred embodiment of the present invention. As shown in Fig. 1 to Fig. 2, this crutch for the blind comprises: telescopic rod, handrail 1, support foot 3, alarm device 2, ultrasonic sensor 11, color sensor 9 and control platform; Handrail 1 is located at the upper end of telescopic rod, and this handrail 1 The front end is provided with an ultrasonic sensor 11, and the ultrasonic sensor 11 is used to sense whether there is an obstacle in front; the leg 3 is located at the bottom of the telescopic rod, preferably formed by welding, and is used to support the telescopic rod. Preferably, the leg 3 is a triangular The bottom of the triangular leg is provided with a rubber pad 4, which ensures the reliability and stability of the crutch during use; the leg 3 is provided with a color sensor 9, and the color sensor 9 is used to sense whether the road is a blind road; the button 10 is set On the armrest 1, the button 10 is connected with the ultrasonic sensor 11 and the color sensor 9 respectively; when the button 10 is pressed, the two sensors start sensing; the control platform is connected with the button 10 and the alarm device 2 respectively, so that when the ultrasonic sensor 11 senses The control platform controls the alarm device 2 to report to the police when there is an obstacle or the color sensor 9 sensing road ahead is not a blind road. In this embodiment, the alarm device 2 is a horn.

With continued reference to FIG. 1 , the telescopic rod includes an upper telescopic rod 6 , a lower telescopic rod 7 socketed with the upper telescopic rod 6 and a knob 7 for positioning the upper telescopic rod 6 , so that the length of the telescopic rod can be adjusted manually.

The working principle of the present invention is that when the button 10 is pressed, the ultrasonic sensor 11 and the color sensor 9 start working:

For the ultrasonic sensor 11, the ultrasonic wave is continuously emitted during operation. If an obstacle in front is encountered, a reflected sound wave will be returned and received by the ultrasonic sensor 11. The ultrasonic sensor 11 measures the time difference between the reflection and the received sound wave, and transmits the data to the The internal control platform analyzes the position of obstacles. If the obstacle distance is too close, the control platform outputs a signal to the prompting horn 2 through the signal line 8, so that it sends a prompting alarm;

For the color sensor 9, the color sensor 9 realizes the conversion of reflected light into photocurrent during operation, and sends the photocurrent to the control platform. Since the blind road 12 is generally painted yellow as a warning color, by setting a certain threshold on the control platform, if the reflected light wavelength represented by the photocurrent is not within the range of yellow light, the control platform transmits a signal to the prompt speaker 2 through the signal line 8, and A prompt is sent by it, so that when the crutch deviates from the blind path 12, the prompt horn 2 will send a prompt alarm.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. These descriptions are not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling others skilled in the art to make and use various exemplary embodiments of the invention, as well as various Choose and change. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims (5)

1. A crutch for the blind who can explore the way, is characterized in that, comprising: telescopic rod; An armrest, which is arranged on the upper end of the telescopic rod, and the front end of the armrest is provided with an ultrasonic sensor, and the ultrasonic sensor is used to sense whether there is an obstacle in front; A leg, which is arranged at the bottom end of the telescopic rod, is used to support the telescopic rod, and the leg is provided with a color sensor, and the color sensor is used to sense whether the road is a blind road; A button, which is arranged on the armrest, is connected to the ultrasonic sensor and the color sensor respectively; when the button is pressed, the two sensors start sensing; alarm device; and The control platform is connected to the alarm device and the button respectively, so that when the ultrasonic sensor senses an obstacle ahead or the color sensor senses that the road is not a blind road, the control platform controls the alarm device to give an alarm. 2 . The crutch for blind persons capable of exploring paths according to claim 1 , wherein the support legs are triangular supports. 3 . 3. The crutch for blind persons capable of exploring paths according to claim 2, wherein a rubber pad is provided on the bottom of the triangular leg. 4 . The crutch for the blind capable of exploring the way according to claim 1 , wherein the alarm device is a horn. 5. The crutch for the blind person capable of exploring the way according to claim 1, wherein the telescopic rod includes an upper telescopic rod, and a lower telescopic rod is socketed with the upper telescopic rod to position the upper telescopic rod knob.