KR100385890B1 - The cap which has a barrier sensor for the blind - Google Patents

Abstract

The present invention is equipped with a device that notifies the presence of obstacles that may collide with the front by receiving a signal reflected by firing the ultrasonic wave to the hat obstacle detection device that can prevent the safety accidents that the blind people hit the obstacle It relates to a hat for the visually impaired.

People with visual impairments carry a cane to detect terrain or obstacles ahead. However, the cane can't detect obstacles that are above the torso height, so it is often hit by these obstacles to be injured.

The present invention has been made to solve the grievances of the visually impaired, having a sensor for transmitting an ultrasonic wave to the tip of the shade of the hat having a shade and a receiving sensor for sensing the ultrasonic wave reflected back to the object in front of the inside of the shade The circuit converts the power supplied by the on / off switch into an ultrasonic wave of a frequency suitable for transmission, and a circuit for amplifying and varying the ultrasonic wave detected by the receiving sensor and supplying a signal to the microprocessor. By constructing a circuit that allows the processor to recognize and ring the buzzer, it can easily detect obstacles that are higher than the upper body that cannot be detected by the cane, effectively preventing obstacle collision safety accidents that are a burden on the walking of the blind. It would be.

Description

The cap which has a barrier sensor for the blind}

The present invention relates to a hat for the handicapped, and in particular, a device for informing the presence or absence of obstacles that may collide because the signal is reflected by firing the ultrasonic wave to the hat is received directly or through the delay element does not move forward. The present invention relates to a hat for the visually impaired having an obstacle detecting device capable of preventing a safety accident from colliding with an obstacle when the visually impaired person walks.

In general, people with visual impairments wear white canes when they go out. This is to detect the terrain and obstacles in front of you so that you can walk safely. It is an eye-like tool for the visually impaired.

However, the white cane can detect some of the obstacles in the upper terrain or lower position, but can not detect obstacles located above the height of the body. This puts a heavy burden on the activities of the visually impaired.

In addition, it is necessary to identify objects and fixed objects that walk or pass together from the front, so that more attention is required when there is a fixed object, so that the fixed object can be used to identify when it should be avoided.

The present invention has been made to solve the conventional problems as described above, the object of which is to receive an ultrasound signal reflected back to the object in front of the device and the device for transmitting ultrasound to the hat worn by the visually impaired through the direct or delay element For the visually impaired with an obstacle detection device that can effectively prevent safety accidents colliding with obstacles when the visually impaired people walk by installing a receiving device so that the obstacles that may not collide in front of them may collide. To provide a hat.

1 is a circuit diagram of an obstacle detecting apparatus installed in a hat of the present invention.

*** Explanation of symbols for the main parts of the drawing ***

1-Battery 2-On / Off switch 3-Microcontroller

4-Amplifier 5-Zener Diode 6-Transmit Amplifier

7-Transmitter 8-Ultrasonic Receiver 9-Receive Amplifier

10-Drive 11-Buzzer C1, C2-Capacitor

I1 to I4-Inverter NA1 to NA4-NAND gate OP1, OP2-Operational amplifier

R1 to R8-Resistor TR21, TR2, TR3-Transistor VR1, VR2-Variable resistor

The present invention for achieving the above object, has a sensor for transmitting an ultrasonic wave to the front end of the shade of the hat having a sunshade and a receiving sensor for sensing the ultrasonic wave reflected back to the object in front, on / off switch inside the sunshade Whether or not there is an object in front by the circuit that converts the power supplied by the ultrasonic wave to an appropriate frequency for transmission and supplies it to the transmission sensor and the delay element of the input unit that amplifies the ultrasonic wave detected by the reception sensor. The microprocessor determines whether or not the object is a fixed object. If there is an object in front of the microprocessor, the presence of the object is determined by a short buzzer sound. This is accomplished by constructing a circuit that allows continuous buzzers to sound.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 schematically shows a circuit configuration for the operation of the present invention,

The microcontroller 3, which is powered by the battery 1 through the on / off switch 2, outputs "H" to the output terminal OUT when the power is supplied, thereby providing a plurality of transistors TR21 and TR2 and a resistor. An oscillation signal consisting of (R1) to (R8) and condensers (C1) and (C2) and a high frequency type of a frequency arbitrarily set by the level amplifier 4 are generated.

The oscillation signal and level amplifier 4 is always a high frequency type with a stable frequency while passing through the zener diode 5, and the plurality of NAND gates NA1 to NA4 and inverters I1 to I4 and The distance at which the ultrasonic signal amplified to a sufficient magnitude is variably determined by the transmitter 7 while passing through the transmission amplifier 6 composed of the variable resistors VR1. Output in the range of,

The ultrasonic signal transmitted from the transmitter 7 and reflected on the object is input to the ultrasonic receiver 8 and amplified by the receiving amplifier 9 by the two operational amplifiers OP1 and OP2 and then the variable resistor VR2. To be directly input to the microprocessor 3 in units of levels determined by the variable,

The microprocessor 3 outputs a short "H" to an output terminal when an ultrasonic signal is input, driving the drive unit 10 of the transistor TR3, while the buzzer 11 is briefly sounded so that an object is placed at a close distance in front of the microprocessor 3. To be aware that

When the ultrasonic signal amplified by the reception amplifier 9 is inputted to the microprocessor 3 for a predetermined time by the resistor R9 and the capacitor C3, which are the delay elements of the input unit 12, it is long to the output stage. By outputting a continuous "H", the buzzer 11 is sounded with a long continuous warning sound through the driving unit 10 of the transistor TR3 so that it is possible to recognize that there is a fixed object at a close distance in front.

This circuit is installed inside the awning of the hat, and to enable this, the awning consists of two upper and lower bodies and secures an installation space therein.

In front of the sunshade, a transmitting unit 7 for emitting ultrasonic waves is provided, and at one side thereof, an ultrasonic receiving unit 8 for detecting ultrasonic waves reflected by an object is provided.

The battery 1 may be mounted on a hat, but may be carried in a separate pocket, in which case a jack for connecting the battery 1 to one side of the hat should be provided.

When walking while wearing a hat of the present invention equipped with such an obstacle sensing device, the visually impaired person may recognize that there is an obstacle because the buzzer 11 sounds briefly when the object in front comes within a predetermined distance, that is, within a predetermined distance. So you can walk carefully.

When the ultrasonic signal received directly from the input unit 12 is received again by the delay element for a predetermined time, the buzzer recognizes that there is a fixed object that may collide in front of the buzzer through the driving unit 10. In (11), a long continuous beeping sound can be prevented from colliding with a fixed object that can not be seen and visually impaired.

In addition, the obstacle detection device of the present invention can be mounted on the hat to eliminate the inconvenience of the visually impaired by the separate installation, and the obstacle is not detected by the cane because the detected obstacles are located at the height of the upper torso range. It detects the presence of obstacles up to the area that cannot be reached.

Therefore, people with disabilities can walk safely while reliably recognizing all obstacles in front of them, and in particular, by identifying moving objects and fixed objects, it is possible to accurately and quickly determine when a person with a disability needs to move out of hand.

As described above, a device that detects a signal reflected by firing ultrasonic waves on the hat and informs the presence of obstacles in front and whether there is a fixed object is installed. Since the obstacles located can be easily detected, there is an advantage of effectively preventing obstacle collision safety accidents, which act as a large burden on the walking of the visually impaired.

Claims (1)

The microcontroller 3, which is powered by the battery 1 through the on / off switch 2, outputs "H" to the output terminal OUT when the power is supplied, thereby providing a plurality of transistors TR21 and TR2 and a resistor. An oscillation signal consisting of (R1) to (R8) and condensers (C1) and (C2) and a high frequency type of a frequency arbitrarily set by the level amplifier 4 are generated. The oscillation signal and level amplifier 4 is always a high frequency type with a stable frequency while passing through the zener diode 5, and the plurality of NAND gates NA1 to NA4 and inverters I1 to I4 and The ultrasonic signal amplified in accordance with the variable resistance value of the variable resistors VR1 is output through the transmitter 7 while passing through the transmission amplifier 6 including the variable resistors VR1, The ultrasonic signal transmitted from the transmitter 7 and reflected on the object is input to the ultrasonic receiver 8 and amplified by the receiving amplifier 9 by the two operational amplifiers OP1 and OP2 and then the variable resistor VR2. At a level determined by the microprocessor 3, the delay is performed through the resistor R9 and the capacitor C3 of the input unit 12 or directly to the microprocessor 3 above. The microprocessor 3 outputs "H" to the output terminal when the ultrasonic signal is input, drives the buzzer 11 while driving the drive unit 10 of the transistor TR3, and fixes the object at a close distance in front of the microprocessor 3. Hat for the visually impaired with an obstacle detecting device, characterized in that the object can be recognized.