CN106667730A

CN106667730A - Intelligent blind guiding stick

Info

Publication number: CN106667730A
Application number: CN201510756460.1A
Authority: CN
Inventors: 江丽; 尤世元
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-11-06
Filing date: 2015-11-06
Publication date: 2017-05-17

Abstract

The invention relates to an intelligent blind guiding stick which is combined by an ultrasonic receiver, an ultrasonic transmitter, a stick body, a control circuit, a stick handle, a rubber member and the like. The stick handle is arranged at the transverse corner of the top end of the stick body which is a hollow column, the soft rubber member is fixedly connected to the bottom end of the stick body, and a power switch which is convenient for a user to push with the hand is arranged at the joint position of the stick body and the stick handle; the stick body is hollow inside and made from a ridge material, a control circuit board, a power supply and ultrasonic transmitting and receiving devices are mounted in the cavity of the stick body and are in electric communication based on electrical principle to realize integral control; the ultrasonic receiver and the ultrasonic transmitter are arranged from top to bottom are arranged at the position, along the direction corresponding to the turning direction of the stick handle, of the upper portion of the rubber body at the lower end of the stick body. The intelligent blind guiding stick has the advantages of novel structure, simple and reliable principle, large measurement and control range, high precision, and good promoting and practical prospects.

Description

Intelligent guiding walking stick for blind person

Technical field：

The invention belongs to electronic technology field, is related to a kind of for detecting preceding object thing and pointing out The intelligent blind use cane of the ultrasonic ranging formula of general direction and distance, particularly a kind of intelligent guiding walking stick for blind person Preparation method.

Technical background：

Existing blind-guiding stick is simple crutch, can only detect preceding object by touching, is used When highly inconvenient and detection range and limited accuracy, go on a journey alone to blind person and bring very big Inconvenience；Although at present country's blind person's articles for use are significantly increased in type and quantity, at some High-end articles for use are such as：Ultrasound wave explores the way the aspects such as instrument almost or blank, and same kind of products at abroad Have the shortcomings that species is single, and its fancy price is not that common people can bear, very Hardly possible is popularized in blind person.Sum up, existing some blind seeking apparatuses its investigative range, Defect is there is in degree of accuracy, comfortableness and practicality；Traditional crutch is existing and uses More than one thousand years, but never have breakthrough in function and technology.With present blind person's articles for use city Field constantly expands, and we have reason to research and develop a kind of new spy intelligent easy to use for them Road instrument.

The content of the invention：

The purpose of the present invention is that the shortcoming for overcoming prior art to exist, and seeks to design a kind of general Ultrasonic sensor in combination with single-chip microcomputer and speech chip, automatic control survey and barrier away from From collection information control voice chip Jing after single-chip microcomputer process sends the device of response prompt tone.

For achieving the above object, the circuit control part of intelligent guiding walking stick for blind person of the present invention mainly has ultrasound Ripple transmitting, receiving circuit, signal processing circuit, telemetry circuit and the part of voice warning circuit four Composition；By being reflected and shape by barrier to the ultrasonic pulse that ultrasonic transmitter is launched Into reflected impulse be acquired, by the signal for being gathered by the two poles of the earth amplify, audio coding lock Single-chip microcomputer is sent into after circuitry phase, is clocked by single-chip microcomputer and distance is calculated, single-chip microcomputer is by basis Calculating result drives voice warning circuit to report corresponding data.

The present invention agent structure include ultrasonic transmitter, ultrasonic receiver, stick body, The parts such as control board, power supply, switch, stick handle and rubber bodies, cylindricality hollow type crutch Body top horizontal turn is formed with stick handle, and bottom is connected and is formed with soft rubber bodies, in stick body and Stick handle joint is formed with the on and off switch for being easy to stick-holding hand to press；Stick body adopts rigid material Inner chamber is made for empty body formula, be provided with inner chamber control board, power supply and ultrasonic emitting with Receive device, be electrically connected by electrical principles, realize integral control function；In stick body lower end The ultrasonic receiver that upper and lower arrangement is formed with to corresponding direction is turned with stick handle in rubber bodies top With emitter, and the unimpeded function of its ultrasound wave is realized in structure；Control board according to Routinely technique is electrically connected to be connected into and is easy to be installed in crutch body and even its control circuit structural principle Logical plank frame, realizes safe and reliable and stable function.

The transmitting of signal handled by the control circuit of the present invention is with reception by two panels ultrasonic sensor Realize, single-chip microcomputer provides clock pulses for the sensor for launching ultrasound wave, ultrasonic transmitter Tranmitting frequency is 40KHz, and transmitting ultrasound wave, Jing in certain angle scope (about 9 degree) The signal processing electricity that reflected signal gives next stage is gathered by ultrasonic receiver after barrier reflection Road.This partial circuit is mainly made up of two-stage high-frequency signal amplifying circuit and a phaselocked loop, letter Export a stable high level signal and give single-chip microcomputer INTO ports after number processing.Single-chip microcomputer is remembered Under from ultrasound wave is launched to signal t this period is received, calculate between barrier apart from s； Produce interrupt requests and call responder to control playback circuit playback, after interrupt routine has been performed Enter back into mastery routine and start the cycle over detection；Blind person can listen to prompt tone by earphone.

Intelligent guiding walking stick for blind person of the present invention compared with traditional crutch technology, its function is new, practical, Circuit is simple, good stability, measurement range are big, high precision, for the spy such as blind person and amblyopia people The different consumer group, with certain market prospect.

Description of the drawings：

Fig. 1 is the overall structure principle schematic of the present invention.

Fig. 2 is the test control circuit principle schematic diagram. of the present invention.

Specific embodiment：

Below by embodiment and combine accompanying drawing the present invention is described in further details：

Embodiment 1：

The agent structure of the present embodiment includes ultrasonic transmitter 1, ultrasonic receiver 2, crutch The parts such as body 3, control board 4, power supply 5, switch 6, stick handle 7 and rubber bodies 8, The top horizontal turn of cylindricality hollow type stick body 3 is formed with stick handle 7, and bottom is connected and is formed with software Formula rubber bodies 18, the electricity for being easy to stick-holding hand to press is formed with stick body 3 and the joint of stick handle 7 Source switch 6；Stick body 3 adopts rigid material to make inner chamber for empty body formula, is provided with inner chamber Control board 4, power supply 5 and ultrasonic transmitter 1 and accepter 2, are electrically connected by electrical principles It is logical, realize integral control function；Turn with stick handle on the top of rubber bodies 8 of the lower end of stick body 3 The ultrasonic receiver 1 and emitter 2 of upper and lower arrangement are formed with to corresponding direction, and in knot The unimpeded function of its ultrasound wave is realized on structure；Control board 4 is according to its control circuit structure Routinely technique is electrically connected to be connected into and is easy to install and the board-like knot for connecting in the stick body 3 principle Structure, realizes safe and reliable and stable function.

The present embodiment has ultrasonic sensor (including emitter and receptor), amplifying circuit, list The electric signal processing circuit of the compositions such as piece machine, speech chip is constituted with single unit system by electrical principles. Wherein ultrasonic sensor uses UCM40R piezoceramic transducers, its operating frequency It is 40KHz, after pulse signal operational amplifier is amplified using common IC1A and IC1B two-stages It is added to IC2.IC2 is the audio coding integrated package LM567 with phaselocked loop, and electric capacity C4 is determined Its locking bandwidth, No. 8 pins of outfan have high level to be changed into low level, used as interrupt requests letter Number deliver to single-chip microcomputer process.Speech chip I₂Using ISD1416, itself SP+ and SP- end segment is external Speaker Y, single-chip microcomputer I₁Using practical 8751.

The present embodiment software handler needs the work for completing to have：Pulse signal is produced, is calculated The distance between with barrier, speech chip audible signal is selected in the safety of judging distance Address, can conventionally be programmed design, and routinely technique by the machine after compiling Code is cured in the middle of the memorizer of single-chip microcomputer, is capable of achieving using conventional technique means.

The parameter and mark that the control circuit of the present embodiment is illustrated by testing and control electrical principles is electrically connected It is logical, except it is stated that selection component parameters in addition to, the parameter of the device such as other resistance, electric capacity is： R1=R2=100 Κ Ω, R3=R5=10 Κ Ω, R4=R6=R7=1 Κ Ω, R8=4.7 Κ Ω, R9=10 Κ Ω；C1=C2=C3=C4=C5=C6=C7=C9=0.1 μ F, C8=2.2 μ F, C10=C11=C12=30 μ F, C13=12MHz, C14=4.7 μ F；Its power supply from aneroid battery or Rechargeable battery, its rated voltage is 5-6V；Ultrasonic sensor is symmetric form, and one is only used as surpassing Pinger, one is only used as ultrasonic receiver.

Claims

1. a kind of intelligent guiding walking stick for blind person, it is characterised in that including ultrasonic transmitter, ultrasound wave Receptor, stick body, control board, power supply, switch, stick handle and rubber bodies, It is characterized in that cylindricality hollow type stick body top horizontal turn is formed with stick handle, bottom is connected Be formed with soft rubber bodies, stick body and stick handle joint be formed be easy to stick-holding hand by Dynamic on and off switch；Stick body adopts rigid material to make inner chamber for empty body formula, in inner chamber Control board, power supply and ultrasonic emitting are installed and receive device, by electrical principles It is electrically connected；Turn to corresponding direction system with stick handle on the rubber bodies top of stick body lower end There are the ultrasonic receiver and emitter of upper and lower arrangement.