TW201316980A - A guiding system for the visually impaired - Google Patents

Abstract

This invention is about a guiding system for the visually impaired. It consists of sensor and buzzer to locate obstacle and then produce a sound to alert the visually impaired in time to avoid injury. Built into an regular eyeglasses with an ultrasound transmitter, receiver and Complex Program Logic Device (CPLD) as an processing unit, this system will alert visually impaired with two warning tones at distance of 2 and 1 meter, respectively, before the visually impaired running into obstacles. Since this system is worn like a regular eyeglasses, it will detect obstacles mainly above ground and prevent injury to the upper part of the body.

Description

Ultrasonic waveguide blind glasses

The present invention relates to a pair of glasses, and more particularly to a supersonic waveguide blind eyeglass.

According to the eye, the eye can be described as the window of the human soul. Once the eye loses its function, people are likely to be injured when they walk because they do not see any obstacles in front, and even endanger their lives.
Please refer to the patent "Blind Crutches" of Taiwan Patent Publication No. 324163. The blind cane is equipped with an ultrasonic processing circuit board in its wand and includes an ultrasonic transmitter, an ultrasonic receiver, a buzzer, etc., and is transmitted by an ultrasonic transmitter. The ultrasonic wave is received by the ultrasonic receiver by means of the ultrasonic wave reflected by the obstacle, and the ultrasonic wave is converted into a trigger signal by the receiver, and then becomes a switching signal of the buzzer after passing through the comparator, thereby making a sound, thereby making a sound Before the blind person has not encountered the obstacle, he can foresee that there are obstacles in front and avoid it, so as to facilitate a crutches of blind friends.
However, although the cane can detect whether there is an obstacle in front, for the visually impaired, the role of the cane is generally to provide the visually impaired person with an early knowledge of whether there is an obstacle in front, and the function of the crutches is Generally, the functions of crutches overlap. Moreover, the crutches are easy to use, because different users can not accurately point the ultrasonic transmitter toward the front when taking the crutches, causing the transmitting end of the ultrasonic transmitter to face backward, causing the crutches to detect The obstacle is an obstacle located behind the visually impaired person, and the function of providing the visually impaired person with an obstacle in front of the visually impaired person cannot be achieved. In addition, the structure of the crutches is convenient for use, so the height of the crutches from the ground is about the waist of the human body, so that the structure of the crutches can only detect whether there is an obstacle in the front ground, but the obstacle has a distance from the ground. When the obstacle is at the same height as the head of the visually impaired person, the structure of the crutches cannot detect the presence of an obstacle in front, and the head of the visually impaired person hits the obstacle.

In order to solve the deficiencies in the prior art, the inventors propose a supersonic waveguide blind glasses, comprising:
A glasses body:
The direction of the lens of the lens body away from the human body is defined as the front.
An ultrasonic transmitter:
The ultrasonic transmitter is disposed on the lens body, and the transmitting end of the ultrasonic transmitter faces forward.
An ultrasonic receiver:
The ultrasonic receiver is disposed on the lens body and corresponds to the ultrasonic transmitter, and the receiving end of the ultrasonic receiver faces forward.
A processing unit:
The processing unit is electrically connected to the ultrasonic receiver.
An alarm unit:
The alarm unit is electrically connected to the processing unit, and the ultrasonic receiver transmits the received ultrasonic signal to the processing unit, so that the processing unit determines the distance between the user and the obstacle, and then controls the alarm. The action of the unit.
When the visually impaired person wears the glasses of the present invention, the ultrasonic signal is continuously transmitted forward by the ultrasonic transmitter, and when there is an obstacle on the current side, the obstacle reflects the ultrasonic signal and is received by the ultrasonic receiver. Receiving, after receiving the ultrasonic signal, the ultrasonic receiver transmits the ultrasonic signal to the processing unit, and if the processing unit determines that the distance between the visually impaired person and the obstacle is within a preset distance, the processing unit Controlling the action of the alarm unit to prompt an obstacle in front of the visually impaired person; in addition, the glasses are attached to the head of the human body, not only ensuring that the transmitting end of the ultrasonic transmitter is directed forward, and the glasses of the present invention can Detect if there are obstacles at a higher level from the ground to ensure the personal safety of the visually impaired.

The construction, features and embodiments of the present invention are illustrated by the accompanying drawings, which will be further understood by the review.
Referring to the first figure, the present invention relates to a supersonic waveguide blind glasses, comprising:
A glasses body (1):
Referring to the first figure, the lens (11) of the lens body (1) is defined as the front away from the human body.
An ultrasonic transmitter (2):
Referring to the first figure, the ultrasonic transmitter (2) is disposed on the lens body (1), and the transmitting end of the ultrasonic transmitter (2) faces forward. As shown in the first figure, the ultrasonic transmitter (2) of the present invention is preferably disposed at the bridge of the nose (12) of the lens body (1).
An ultrasonic receiver (3):
Referring to the first figure and the second figure, the ultrasonic receiver (3) is disposed on the lens body (1) and corresponds to the ultrasonic transmitter (2), and the ultrasonic receiver (3) The receiving end faces forward, so that the ultrasonic signal (21) emitted when the ultrasonic transmitter (2) operates is reflected by the obstacle (D) and received by the ultrasonic receiver (3). As shown in the first figure, the ultrasonic receiver (3) is preferably disposed at the bridge of the nose (12) of the lens body (1).
A processing unit (4):
Referring to the third figure, the processing unit (4) is electrically connected to the ultrasonic receiver (3).
An alarm unit (5):
Referring to the first figure, in conjunction with the second and third figures, the alarm unit (5) is electrically connected to the processing unit (4), and the processing unit (4) is adapted to receive the ultrasonic receiver (3). The transmitted ultrasonic signal (21) controls the action of the alarm unit (5) after determining the distance between the visually impaired person (B) and the obstacle (D). The alarm unit (5) can be a vibrator or a buzzer, and for the purposes of the present invention, the alarm unit (5) is preferably a headset to avoid the alarm unit (5) generating Sound interferes with others.
Referring to the first figure, in conjunction with the second and third figures, the visually impaired person (B) wears the glasses body (1) when the glasses (A) are used, and the ultrasonic transmitter (2) When the action is continued, the ultrasonic signal (21) is continuously emitted. When the obstacle (D) is present on the current side, the obstacle (D) reflects the ultrasonic signal (21), so that the ultrasonic signal (21) is The ultrasonic receiver (3) receives and transmits to the processing unit (4) to cause the processing unit (4) to determine the distance of the obstacle (D) from the visually impaired person (B), when the obstacle (D) When the visually impaired person (B) is within a preset distance, the processing unit (4) controls the alarm unit (5) to start an action to remind the visually impaired person (B) that there is an obstacle (D). Preferably, the present invention sets the preset distance to 200 cm and 100 cm. When the visually impaired person (B) is 200 cm away from the obstacle (D), the alarm unit (5) emits a low frequency sound to notify the visual impediment. (B), there is an obstacle (D) at 200 cm in front; and when the visually impaired person (B) is 100 cm away from the obstacle (D), the alarm unit (5) emits a high-frequency sound to notify the visually impaired (B), there is an obstacle (D) at 100 cm in front. The high frequency sound and low frequency sound referred to in this specification refer to the frequency of the sound, and the frequency of the high frequency sound is higher than the frequency of the low frequency sound, so the alarm unit (5) The high-frequency sound emitted at 100 cm is sharper than the low-frequency sound emitted at 200 cm.
Therefore, the glasses (A) of the present invention can not only allow the visually impaired person (B) to predict in advance that there is an obstacle (D) in advance, but to respond early to avoid, and the glasses (A) are worn on the human head. Not only can the emission end of the ultrasonic transmitter (2) be directed forward, but the glasses (A) of the present invention can detect whether there is an obstacle (D) at a higher position from the ground to ensure the visually impaired person (B) Personal safety.
The visually impaired person (B) preferably uses a crutches (C) when using the glasses (A) of the present invention, so that the visually impaired person (B) can learn whether the front ground is by the crutches (C) while walking. There is an obstacle (D), and it is known by the glasses (A) whether there is an obstacle (D) at a distance from the ground to further ensure the personal safety of the visually impaired person (B) while walking.
Referring to the third figure, the processing unit (4) includes:
A shock unit (41):
Referring to the third figure, the oscillating unit (41) outputs an oscillating frequency signal when it operates.
A frequency reduction unit (42):
Referring to the third figure, the frequency down unit (42) is electrically connected to the oscillating unit (41) to receive the oscillating frequency signal, and down-converts the oscillating frequency signal to output a down-converted signal. The frequency reduction signal can be down-converted, and a down-converted signal having a lower oscillation frequency than the oscillation frequency signal is outputted by the frequency reduction unit (42) according to the present invention, wherein the frequency reduction unit (42) Preferably, the frequency divider (47) is provided with a preset frequency value, and the oscillating frequency signal is divided by the preset frequency value to obtain a down-converted signal.
A PWM (43):
Referring to the third figure, together with the second figure and the first figure, the PWM (43) is electrically connected to the ultrasonic receiver (3) to receive the ultrasonic signal (21), and the ultrasonic signal ( 21) Transform into a digital signal.
A counting unit (44):
Referring to the third figure, as shown in the second figure, the counting unit (44) is electrically connected to the down-converting unit (42) and the PWM (43), respectively, and the counting unit (44) receives the down-converted signal respectively. And the digital signal for the counting unit (44) to calculate the distance between the visually impaired person (B) and the obstacle (D) to obtain a distance signal.
A multiplexer (45):
Referring to the third figure and the second figure, the multiplexer (45) is electrically connected to the counting unit (44) and the alarm unit (5), respectively, and receives the distance signal, the multiplexer (45) A preset distance signal is provided to determine that the multiplexer (45) controls the alarm unit (5) when the distance signal satisfies the preset distance signal. For the purpose of the present invention, the preset distance signal is preferably set to be 200 cm and 100 cm. When the distance signal indicates that the visually impaired person (B) is within 200 cm of the obstacle (D), the multiplexer ( 45) The alarm unit (5) is controlled to emit a low frequency sound. When the distance from the obstacle (D) is 100 cm, the multiplexer (45) controls the alarm unit (5) to emit a high frequency sound to remind There is an obstacle in front of the visually impaired person (B), and further the multiplexer (45) can control the frequency of the sound of the alarm unit (5) according to the distance of the visually impaired person (B) from the obstacle (D).
Referring to the third figure, the processing unit (4) is preferably a Complex Programmable Logic Device (CPLD). By means of the characteristics of the CPLD, the processing unit (4) can set the frequency down unit (42), the counting unit (44), and the multiplexer (45) by a program, so that the volume of the processing unit (4) can be Zoom out.
Please refer to the third figure and the second figure, wherein the path of the frequency divider (47) electrically connected to the alarm unit (5) is further provided with a filtering unit (46). Since the multiplexer (45) controls the alarm unit (5), the output frequency is unstable, and the alarm unit (5) cannot correctly follow the distance of the visually impaired person (B) from the obstacle (D). The sound of different frequencies is generated. Therefore, after the filtering unit (46) is added, the signal outputted by the multiplexer (45) to the alarm unit (5) can be stabilized, so that the alarm unit (5) can be compared. Correctly, according to the distance of the visually impaired person (B) from the obstacle (D), different frequency actions are generated.
Please refer to the third figure and the second figure, wherein the multiplexer (45) is electrically connected to the alarm unit (5), and a frequency divider (47) is further provided to make the multiplexer (45) When the alarm unit (5) is controlled to operate, the frequency divider (47) generates a complex frequency, thereby controlling the operating frequency of the alarm unit (5), and the visually impaired person (B) is getting closer to the obstacle ( When D) (ie, when the distance is shortened from 200 cm to 100 cm), the sound emitted by the alarm unit (5) will be converted from a low frequency sound to a high frequency sound. As shown in the third figure, the multiplexer (45) is electrically connected to the path of the alarm unit (5), and the frequency divider (47) and the filtering unit (46) are preferably arranged in sequence.
Referring to the first figure and the third figure, the processing unit (4) is preferably disposed inside a lens (11A), and a power supply device (6) is disposed inside the other lens (11B). And the processing unit (4) is preferably equal in weight to the power supply device (6) to prevent the visually impaired person (B) from being uncomfortable when wearing the glasses (A) of the present invention.
In summary, the present invention is indeed in line with industrial utilization, and is not found in publications or publicly used before application, nor is it known to the public, and has non-obvious knowledge, conforms to patentable requirements, and patents are filed according to law. .
However, the above description is a preferred embodiment of the invention in the industry, and all the equivalent changes made according to the scope of the patent application of the present invention belong to the scope of the claim.

(A). . . glasses

(B). . . Visually impaired

(C). . . crutch

(D). . . obstacle

(1). . . Glasses body

(11). . . lens

(11A). . . lens

(11B). . . lens

(12). . . bridge of the nose

(2). . . Ultrasonic transmitter

(twenty one). . . Ultrasonic signal

(3). . . Ultrasonic receiver

(4). . . Processing unit

(41). . . Oscillating unit

(42). . . Down frequency unit

(43). . . PWM

(44). . . Counting unit

(45). . . Multiplexer

(46). . . Filter unit

(47). . . Frequency divider

(5). . . Alarm unit

(6). . . Power supply unit

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 2 is a schematic view showing the state of use of the present invention. FIG. 3 is a schematic view showing the electrical connection of internal components of the processing unit of the present invention.

(A). . . glasses

(1). . . Glasses body

(11). . . lens

(11A). . . lens

(11B). . . lens

(12). . . bridge of the nose

(2). . . Ultrasonic transmitter

(3). . . Ultrasonic receiver

(4). . . Processing unit

(5). . . Alarm unit

(6). . . Power supply unit

Claims (7)

A supersonic waveguide blind eyeglass comprising:
a lens body: the direction of the lens away from the human body is defined as the front;
An ultrasonic transmitter: disposed on the lens body, the transmitting end of the ultrasonic transmitter facing forward;
An ultrasonic receiver: disposed on the lens body and corresponding to the ultrasonic transmitter, the receiving end of the ultrasonic receiver facing forward;
a processing unit: electrically connected to the ultrasonic receiver;
An alarm unit is electrically connected to the processing unit, and the ultrasonic receiver is configured to transmit the received ultrasonic signal to the processing unit, so that the processing unit determines the distance between the visually impaired person and the obstacle Control the action of the alarm unit. The ultrasonic waveguide blind glasses of claim 1, wherein the processing unit comprises:
A oscillating unit: an oscillating frequency signal is generated during the action;
a frequency down unit: electrically connecting the oscillating unit to receive the oscillating frequency signal, and down-converting the oscillating frequency signal to obtain a down-converted signal;
a PWM: electrically connecting the ultrasonic receiver to receive the ultrasonic signal, and converting the ultrasonic signal into a digital signal;
a counting unit: electrically connecting the down-converting unit and the PWM, respectively, the counting unit respectively receiving the down-converted signal and the digital signal, so that the counting unit calculates a distance between the user and the obstacle to obtain a distance signal ;
a multiplexer: electrically connected to the counting unit and the alarm unit and receiving the distance signal, wherein the multiplexer is provided with a preset distance signal to determine that when the distance signal satisfies the preset distance signal, the multiplexer The device controls the action of the alarm unit. The ultrasonic waveguide blind glasses according to claim 2, wherein the processing unit is a Complex Programmable Logic Device. The ultrasonic waveguide blind glasses according to claim 2, wherein the path of the multiplexer electrically connecting the alarm unit further comprises a filtering unit. The ultrasonic waveguide blind glasses of claim 2, wherein a path of the multiplexer electrically connected to the alarm unit is further provided with a frequency divider, so that the multiplexer controls the frequency divider by the frequency divider The operating frequency of the alarm unit. The ultrasonic waveguide blind glasses of claim 1, wherein the alarm unit is an earphone. The ultrasonic waveguide blind glasses of claim 1, wherein the processing unit is disposed inside a lens.