CN202305795U

CN202305795U - Simple range finding device for blind person

Info

Publication number: CN202305795U
Application number: CN2011202171482U
Authority: CN
Inventors: 赵智慧; 柳青青; 李金冬; 郑政; 林一聪; 张彦; 韩依辰
Original assignee: University of Shanghai for Science and Technology
Current assignee: University of Shanghai for Science and Technology
Priority date: 2011-06-23
Filing date: 2011-06-23
Publication date: 2012-07-04
Anticipated expiration: 2021-06-23

Abstract

A simple range finding device for a blind person comprises a housing and a hoop-loop wrist strip, wherein function modules are arranged in the housing. The simple range finding device for a blind person is characterized in that the external surface of the upper housing is provided with buzzing holes and an ultrasonic transmission hole; the lower housing is provided with a power switch; two vertical concave grooves are disposed on the back of the housing, and the hoop-loop wrist strip is inserted in the grooves; the function modules include a single-chip microcomputer, an ultrasonic range finding module, a voice module and a power supply module, wherein all the function modules are welded on the same circuit board via a lead; the output of the power supply module is connected with the power supply input terminal of the chip of the single-chip microcomputer; and one output pin of the single-chip microcomputer is connected with a max232 chip in a series manner and then connected with the ultrasonic module, and the other output pin of the single-chip microcomputer is directly connected with voice module. The simple range finding device can be directly worn on the wrist or the ankle of a blind person, or be hand-held by the blind person, or be placed on a blind stick. The device of the utility model is convenient, simple and practical, and is better than a conventional blind stick type range finder.

Description

The simple and easy distance measuring equipment that a kind of blind man uses

Technical field

The utility model relates to the simple and easy distance measuring equipment that a kind of blind man uses, and is used for the blind person and judges and avoiding barrier.

Background technology

The blind person runs into barrier through regular meeting in daily life because of carelessness.In order to forecast these barriers ahead of time, corresponding range finding warning blind man's stick has also been arranged on the market, but the common price of this blind man's stick is more expensive; When built-in range finding alarm module damages, be difficult to again repair, need buy new substituting; And this built-in range finder module normally is fixed on a certain position of blind man's stick; When for example being placed on the blind man's stick stage casing, the barrier of lower position just can not forecast that this lets the blind person be difficult to find range and avoiding barrier according to reality environment of living in.

The utility model content

The utility model discloses the simple and easy distance measuring equipment that a kind of blind man uses, range finder module is made the wrist strap form., the blind person can directly not be worn on wrist portion or ankle portion when having blind man's stick at one's side; When blind man's stick, can regulate the wrist strap position according to residing environment; Can be entangled in any part of blind man's stick, can be placed on the blind man's stick middle part when being in, be used for judging higher barriers such as tables, chairs and benches; Go out when the roadside, can suitably be placed on the bottom, be used for judging step that overhead distance is little or the like.Easy to use, flexible, overcome existing blind man's stick formula stadimeter functional module stationkeeping, can not accurately forecast the defective of barrier.

The simple and easy distance measuring equipment that a kind of blind man uses comprises housing, the VELCRO wrist strap; Housing build-in function module is characterized in: the upper shell outside surface is provided with buzzing hole, ultrasonic beam orifice, and lower house is provided with power switch; There are two perpendicular connected in stars at described housing back, and the VELCRO wrist strap interts in it; Described functional module comprises: single-chip microcomputer, supersonic sounding module, voice module, power module; Through wire bonds on same circuit board; The power input of the output order sheet machine chip of power module; Be connected with ultrasonic module behind the output pin serial connection max232 chip of single-chip microcomputer, the another output pin of single-chip microcomputer directly is connected with voice module.

Said single-chip microcomputer model is Atmega48v.

The utility model voice module according to SCM program control, divides five grades to carry out reading at 100cm, 50cm, 30cm, 20cm, 10cm place.

The selected ultrasonic probe of supersonic sounding module is a circular wafer normal probe, and centre frequency is 40khz, can send out and can receive.

The simple and easy distance measuring equipment that a kind of blind man of the utility model uses can directly be worn on wrist, ankle or hand-held, perhaps places on the blind man's stick.Convenient, simple, practical, and be superior to blind man's stick formula stadimeter in the past, in blind person's traveling process, can point out the peripheral obstacle approximate distance, let the blind person that the situation around the own space of living in is had gained some understanding, can prevent that the blind person from wounding and wait accident.

Description of drawings

The simple and easy distance measuring equipment surface structure synoptic diagram that Fig. 1 uses for blind man;

The simple and easy distance measuring equipment assembly structure synoptic diagram that Fig. 2 uses for blind man;

The simple and easy distance measuring equipment fundamental diagram that Fig. 3 uses for blind man.

1, singlechip chip; 2, power module; 3, max232 chip; 4, voice module; 5, supersonic sounding module; 6, power switch; 7, screw; 8, buzzing hole; 9, VELCRO wrist strap; 10, ultrasonic beam orifice.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is described in detail.

The simple and easy distance measuring equipment that a kind of blind man uses; Like Fig. 1, shown in Figure 2: comprise housing, VELCRO wrist strap 9, housing build-in function module; The upper shell outside surface is provided with buzzing hole 8, ultrasonic beam orifice 10; Lower house is provided with power switch 6, and there are two perpendicular connected in stars at described housing back, and the VELCRO wrist strap interts in it; Described functional module comprises: singlechip chip 1, supersonic sounding module 5, voice module 4, power module 2; Through wire bonds on same circuit board; The power input of the output order sheet machine chip 1 of power module 2; Output pin serial connection max232 chip 3 backs of singlechip chip 1 are connected with supersonic sounding module 5, and the another output pin of singlechip chip 1 directly is connected with voice module 4, and the singlechip chip model is Atmega48v; Upper and lower shell body and function screw 7 is fixing.

Turn on the power switch 6 during use, circuit working, as shown in Figure 3: supersonic sounding module 5 is sent ultrasonic; Propagate through ultrasonic beam orifice 10, this moment, singlechip chip 1 picked up counting, when ultrasound wave runs into barrier and returns; Singlechip chip 1 stops timing, and calculates the distance between people and the barrier according to correlation formula, and singlechip chip 1 judges whether five pre-alarm number (100cm into setting according to distance; 50cm, 30cm, 20cm; 10cm), if then let voice module 4 quote corresponding distance through buzzing hole 8.This voice module 4 needs to determine whether sounding through the judgement of singlechip chip 1, can avoid the noise of count off always like this, and saves power supply.

Claims

1. the simple and easy distance measuring equipment that uses of a blind man; Comprise housing, VELCRO wrist strap, housing build-in function module; It is characterized in that: the upper shell outside surface is provided with buzzing hole, ultrasonic beam orifice; Lower house is provided with power switch, and there are two perpendicular connected in stars at described housing back, and the VELCRO wrist strap interts in it; Described functional module comprises: single-chip microcomputer, supersonic sounding module, voice module, power module; Through wire bonds on same circuit board; The power input of the output order sheet machine chip of power module; Be connected with ultrasonic module behind the output pin serial connection max232 chip of single-chip microcomputer, the another output pin of single-chip microcomputer directly is connected with voice module.

2. the simple and easy distance measuring equipment that uses according to the described a kind of blind man of claim, it is characterized in that: said single-chip microcomputer model is Atmega48v.