CN204744864U

CN204744864U - Lead blind system based on ultrasonic ranging

Info

Publication number: CN204744864U
Application number: CN201520344372.6U
Authority: CN
Inventors: 何天生
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-05-26
Filing date: 2015-05-26
Publication date: 2015-11-11
Anticipated expiration: 2025-05-26

Abstract

The utility model relates to a lead blind system based on ultrasonic ranging, including power supply circuit, ultrasonic emitting module, ultrasonic wave receiving module, the minimum system of singlechip, temperature detection module and pronunciation navigation module, power supply circuit's output signal transmits ultrasonic emitting module to, ultrasonic emitting module and the minimum two -way data communication of system of singlechip, ultrasonic wave receiving module and temperature detection module's output signal transmits the minimum system of singlechip to, the output signal of the minimum system of singlechip sends to pronunciation navigation module, the utility model discloses an ultrasonic ranging and voice broadcast realize blind person's navigation, have with low costs, convenient and practical, characteristics such as humanized strong.

Description

A kind of blind guiding system based on ultrasonic ranging

Technical field

This utility model relates to electronic circuit field, particularly be a kind of blind guiding system based on ultrasonic ranging.

Background technology

Blind and vision impairment problem is one of society and public health problem serious in the world, and global blind person's quantity is 37,000,000, and VI total number of persons is 100,016,100, and wherein 100,002,004 million peoples suffer from low visual acuity.According to statistics, the annual newly-increased blind person's quantity in the whole world is 100-200 ten thousand, and this means that every five seconds just has a people blind, each minute just has a child blind.Because blind person is annual 25000000000 dollars to the financial burden that the whole world is brought, expects the year two thousand twenty global blind person quantity and will be increased to nearly 100,000,000 people.And China is one of country that whole world blind person is maximum; in 1989; China Disabled Federation just gives notice; require that various places are when annual international blind person saves, and appeared by province (city) blind person association, business department assists; in conjunction with local circumstance; hold suitable celebration, to enliven the life of blind person, these embody country with society to blind care.But or fundamentally can not solve the life inconvenience problem of blind person, particularly walk out of doors, therefore, by science and technology now, to be used for blind man navigation be very necessary, and what first expect is exactly ultrasonic technology ranging technology, ultrasound wave has high directivity, energy is easy to concentrate, propagation distance is comparatively far away and to features such as barrier registrations, its product have volume relatively little, be convenient for carrying, the advantage such as cheap.Therefore adopt ultrasonic ranging and voice broadcast to realize blind man navigation, there is certain practical value.

Utility model content

The purpose of this utility model is to provide a kind of blind guiding system based on ultrasonic ranging.

This utility model solves the technical scheme that its technical problem adopts: a kind of blind guiding system based on ultrasonic ranging, include power circuit, ultrasonic emitting module, ultrasound wave receiver module, single-chip minimum system, temperature detecting module and Voice Navigation module, the output signal of described power circuit is transferred to ultrasonic emitting module, described ultrasonic emitting module and single-chip minimum system bidirectional data communication, the output signal of described ultrasound wave receiver module and temperature detecting module is transferred to single-chip minimum system, the output signal of described single-chip minimum system is sent to Voice Navigation module.

Preferably, described ultrasonic emitting module adopts the multivibrator of 555 intervalometer compositions.

Preferably, described ultrasound wave receiver module is made up of the amplifying circuit connected successively, detecting circuit and rectification circuit.

Preferably, described temperature detecting module adopts DS18B20 temperature detection chip.

Preferably, described single-chip minimum system adopts STC12C5A60S2 chip.

Preferably, described Voice Navigation module adopts WTC020 Voice Navigation chip.

By adopting above-mentioned technical scheme, the beneficial effects of the utility model are: this utility model adopts ultrasonic ranging and voice broadcast to realize blind man navigation, has cost low, convenient and practical, the features such as hommization is strong.

Accompanying drawing explanation

Fig. 1 is frame assumption diagram of the present utility model;

Fig. 2 is circuit theory diagrams of the present utility model.

Detailed description of the invention

This utility model is further illustrated below in conjunction with the drawings and specific embodiments.

As Fig. 1, shown in Fig. 2, a kind of blind guiding system based on ultrasonic ranging of the present utility model, include power circuit, ultrasonic emitting module, ultrasound wave receiver module, single-chip minimum system, temperature detecting module and Voice Navigation module, the output signal of described power circuit is transferred to ultrasonic emitting module, described ultrasonic emitting module and single-chip minimum system bidirectional data communication, the output signal of described ultrasound wave receiver module and temperature detecting module is transferred to single-chip minimum system, the output signal of described single-chip minimum system is sent to Voice Navigation module.

The running voltage of all parts is produced by power circuit, make working properly, ultrasound wave is launched to direction of travel again by ultrasonic emitting module, single-chip minimum system starts timing simultaneously, ultrasound wave fires back run into barrier in propagation way after immediately, when ultrasound wave receiver module receiving terminal receives echo, single-chip minimum system stops timing, thus obtain a time, single-chip minimum system carries out compensated distance by Current Temperatures, pass through the calculating of its inside again, calculate the distance of barrier according to emission source, speech play navigation is carried out again by controlling Voice Navigation module, thus realize navigation purpose.

Described ultrasonic emitting module adopts the multivibrator of 555 intervalometer compositions, produced by the control of single-chip minimum system, when single-chip minimum system exports high level, 555 runs, electric capacity C2 is charged, when being charged to 2/3VCC, 3 foot upsets of 555 intervalometers, the inner triode ON of 555 intervalometers, electric capacity stops charging, to resistance R3 and audion electric discharge, when being down to 1/3VCC, 3rd feet state of 555 intervalometers overturns again, electric capacity C2 discharges end, continue charging, such repeated charge, meet the requirements of output waveform frequency, thus launch.

Described ultrasound wave receiver module is made up of the amplifying circuit connected successively, detecting circuit and rectification circuit.Because ultrasonic signal is the sound wave being greater than more than 20KHz, so echo-signal frequency is higher, when ultrasound wave receiver module receives ultrasound wave, convert it into voltage signal, again amplified by audion Q4 after capacitor C9 is coupled after being amplified by audion Q3, become DC voltage by the detecting circuit of electric capacity C10 and diode D2, D3 composition, deliver to single-chip minimum system after being amplified by audion Q5, carry out subsequent treatment.

This utility model, mainly because ultrasound wave is easily by the impact of temperature, so detect scene temperature, and is passed to single-chip minimum system and is carried out compensated distance, thus reach requirement accurately.Described temperature detecting module adopts DS18B20 temperature detection chip, has that capacity of resisting disturbance is strong, conversion accuracy is high, without the need to advantages such as debugging during use, for hardware designs brings convenience.

Described single-chip minimum system adopts STC12C5A60S2 chip, have that capacity of resisting disturbance is strong, speed is fast, low-power consumption, the feature such as cannot to decipher, in the present system mainly as control core, control ultrasonic emitting end and data are processed, and speech chip is passed in instruction.

Described Voice Navigation module adopts WTC020 Voice Navigation chip, this chip has a line serial ports control model, decrease peripheral complicated circuit, the feature that voice length is long, in this utility model, play element mainly as Voice Navigation, voice message is proposed to the instruction that blind person provides according to single-chip minimum system.

Above-describedly be only a preferred embodiment of the present utility model, the scope that this utility model is implemented can not be limited, every equalization change of doing according to this utility model claim and decoration, all should still belong in scope that this utility model contains.

Claims

1. the blind guiding system based on ultrasonic ranging, it is characterized in that: include power circuit, ultrasonic emitting module, ultrasound wave receiver module, single-chip minimum system, temperature detecting module and Voice Navigation module, the output signal of described power circuit is transferred to ultrasonic emitting module, described ultrasonic emitting module and single-chip minimum system bidirectional data communication, the output signal of described ultrasound wave receiver module and temperature detecting module is transferred to single-chip minimum system, and the output signal of described single-chip minimum system is sent to Voice Navigation module.

2. a kind of blind guiding system based on ultrasonic ranging according to claim 1, its feature exists: described ultrasonic emitting module adopts the multivibrator of 555 intervalometer compositions.

3. a kind of blind guiding system based on ultrasonic ranging according to claim 2, its feature exists: described ultrasound wave receiver module is made up of the amplifying circuit connected successively, detecting circuit and rectification circuit.

4. a kind of blind guiding system based on ultrasonic ranging according to claim 1, its feature exists: described temperature detecting module adopts DS18B20 temperature detection chip.

5. a kind of blind guiding system based on ultrasonic ranging according to claim 1, its feature exists: described single-chip minimum system adopts STC12C5A60S2 chip.

6. a kind of blind guiding system based on ultrasonic ranging according to claim 1, its feature exists: described Voice Navigation module adopts WTC020 Voice Navigation chip.