CN2248956Y

CN2248956Y - Hand holding type multifunction device for guiding blind person

Info

Publication number: CN2248956Y
Application number: CN 95235311
Authority: CN
Inventors: 孟祥增; 毕无敌; 陈德增
Original assignee: Shandong Normal University
Current assignee: Shandong Normal University
Priority date: 1995-12-21
Filing date: 1995-12-21
Publication date: 1997-03-05
Anticipated expiration: 2005-12-21

Abstract

The utility model discloses a hand-held multifunction miniature apparatus which integrates the functions of sound receiving, warning, and blind guiding into a whole, suitable for blind people. The utility model comprises a receiver circuit which is used for receiving the broadcast of a station, a warning circuit which is used for generating call signals, and a blind guiding circuit which is used for measuring the distance of front obstacles and converting the distance to acoustic pulse signals. According to the frequency of the acoustic pulse, a user can judge the distance and the general shape of the front obstacles and the smoothness of a road. Because of the novel circuit design, the utility model integrates the functions of a blind guiding glasses, an electronic stick, and a radio. The utility model has the advantages of small size, light weight, low cost, and convenient operation.

Description

The hand-held type multifunctional blind guide

The utility model discloses a kind of pocket instrument of hand-held type multifunctional that integrates radio reception, warning and guide, blind man uses.

Blind is very painful, and blindman is very inconvenient.Present most of blind person walks and still adopts hand-held bamboo rod-type to explore the way, and is not only own inconvenient, but also counteracts to others.Blind guiding mirror brings glad tidings to the blind person, has replaced blind person's the bamboo bar of exploring the way, and give the very big help of blind person, but the blind guiding mirror band is heavier on head, changes the direction inconvenience by shaking the head, and function singleness.The electronics walking stick can help the blind person to explore the way and the calling for help of can reporting to the police where necessary, bring many benefits for blind person and handicapped people, but volume is big, function singleness.90108200.7 application for a patent for invention discloses a kind of " torch-like blind man's guider with scale lanquage ", for the blind person provides a kind of blind-guide device preferably, but also exists function singleness, barrier indication spacing distance is big, discontinuous, the shortcoming that manufacturing cost is too high.

The utility model purpose provides that a kind of volume is little, and price is low, the pocket instrument of hand-held type multifunctional easy and simple to handle, and blind man uses.The blind person carries, and uses guiding function during walking, can work as broadcast receiver during rest and use, and uses warning function when asking someone to give way.

The utility model mainly is made up of three partial function circuit: receiver circuit 1, warning circuit 2 and guide circuit 3, receiver circuit 1 adopts amplitude modulation or amplitude modulationfrequency modulation monolithic receiver circuit, warning circuit 2 adopts the integrated dual time base generation of monolithic circuit to produce FM signal, the effect of analog call, perhaps directly adopting speech chip to produce ambulance calls out or other voice signal, guide circuit 3 adopts the ultrasonic ranging circuit, utilize pulse ranging method or phase ranging method to measure the distance of barrier, and then distance signal is converted to and cycle or the proportional pulse signal of frequency, pulse signal is controlled sound generating circuit thus, the acoustic impluse signal that generation cycle or frequency change with obstacle distance.The voice signal of three partial circuits and power supply are by functional switch 4 conversions, and power amplifier and loudspeaker 5 are shared, all electric routing battery 6 power supplies.

Because the circuit design of the utility model novelty makes it gather blind guiding mirror, electronics walking stick and wireless function, and has the advantages that volume is little, in light weight, price is low, easy and simple to handle.

Accompanying drawing 1 is the whole block diagram that constitutes of the present utility model.

1: receiver circuit 2: warning circuit 3: the guide circuit

4: functional switch 5: power amplifier and loudspeaker 6: battery

Accompanying drawing 2 is external form figure of a kind of model machine of the present utility model.

4: functional switch 6: battery 7: volume potentiometer

8: tuning knob 9: transmitting probe 10: accept probe

11: earphone jack

Accompanying drawing 3 is circuit diagrams of a kind of specific implementation method of the present utility model.

With reference to accompanying drawing 1-3: the receiver circuit 1 in the utility model adopts amplitude modulation medium wave band monolithic integrated circuit IC5 (ULN-3839A), and power amplifier and loudspeaker 5, earphone jack 11, volume potentiometer 7 (charged source switch), battery 6 are that three functions are shared in the sheet.This receiver circuit 1 can clear reception medium wave band AM broadcasting.Warning circuit 2 adopts the integrated dual time base generation of monolithic IC circuit 2 (LF7556) to produce FM signal, analog call sound (calling out effect) as ambulance, and this FM signal is power amplifier in functional switch 4 send receiver circuit 1.Guide circuit 3 adopts reflecting type ultrasonic pulse ranging circuit, the voltage signal of obstacle distance is represented in output, deliver to the V/T change-over circuit, be transformed into pulse signal, pulse frequency and obstacle distance be inversely proportional to (distance near more frequency high more), this pulse signal is controlled sound generation IC circuit 2 (LF7556) again and is produced acoustic impluse signal, this acoustic impluse signal power amplifier in functional switch 4 send receiver circuit 1.IC1 in the accompanying drawing 3 (LF7556) the first half produces the range finding pulse signal, the latter half produces ultrasonic wave generation signal (about 40KHz), range finding pulse signal control ultrasonic wave generation signal generating circuit, produce pulse ultrasonic wave generation signal, delivering to BG1 driving ultrasonic transducer TS (transmitting probe 9) generation ultrasonic pulse launches, ultrasonic pulse runs into the barrier back reflection and returns, (accept probe 10 and be transformed into the signal of telecommunication through ultrasonic transducer RS, amplify and detection through IC3 (LF444) two-stage, trigger IC4 (CD4013) and convert pulse width signal to, pulse duration is directly proportional with obstacle distance, becomes d. c. voltage signal after low-pass filtering.D. c. voltage signal is transformed into the pulse signal that the cycle is directly proportional with input voltage via the V/T translation circuit that BG3, BG4 and two comparators, d type flip flop are formed again.This pulse signal control sound generation IC circuit 2 (LF7556) produce guide acoustic impluse signal.BG2 is for reducing the ultrasonic wave repercussions in the accompanying drawing 3, and R6 is provided with for suppressing the horizontal repercussions interference of ultrasonic wave.

The utility model outside only is provided with functional switch 4, volume potentiometer 7, tuning knob 8 and an earphone jack 11, uses very simple.Using method is as follows:

1. open bonnet, install battery, and then cover tight bonnet by polarity.

2. function of use switch 4 selection functions are done radio reception, guide and warning and are used.

3. rotate volume potentiometer 7, whether opening power plugs in the earphone according to use occasion, regulates suitable volume.

4. regulate tuning knob 8 during radio reception and select satisfied program.

5. the place ahead that will survey the blind guide subtend during guide, the place ahead is if there is the pulse of sounding of barrier, blind guide.Obstacle distance is near more, and acoustic impluse is rapid more.The blind guide pulse frequency that pipes is very high when obstacle distance very near (less than 1 meter), and is implied with chimes of doom, warning blind person front danger.

6. ask someone to give way or other uses warning function when needing, extract earphone and allow the external world hear chimes of doom.

7. functional switch 4 can be pushed the position of pass when not using, when reusing wave band 4 switches directly be pushed desired location, volume can remain unchanged like this.

Claims

1. multi-functional blind guide is characterized in that:

This blind guide is made up of receiver circuit 1, warning circuit 2, guide circuit 3 and functional switch 4, power amplifier and loudspeaker 5, battery 6;

Receiver circuit 1 adopts amplitude modulation or amplitude modulationfrequency modulation monolithic receiver circuit;

Warning circuit 2 adopts the integrated dual time base generation of monolithic circuit to produce FM signal, and the analog call effect perhaps directly adopts speech chip to produce ambulance and calls out or other voice signal;

Guide circuit 3 adopts the ultrasonic ranging circuit, utilize pulse ranging method or phase ranging method to measure the distance of barrier, and then distance signal is converted to and cycle or the proportional pulse signal of frequency, pulse signal is controlled sound generating circuit thus, the acoustic impluse signal that generation cycle or frequency change with obstacle distance; The voice signal of three partial circuits and power supply are by functional switch 4 conversions, and power amplifier and loudspeaker 5 are shared, all electric routing battery 6 power supplies.

2. multi-functional blind guide according to claim 1, it is characterized in that, receiver circuit 1 adopts amplitude modulation medium wave band monolithic integrated circuit IC5 (ULN-3839A), and power amplifier and loudspeaker 5, earphone jack 11, volume potentiometer 7 (charged source switch), battery 6 are that three functions are shared in the sheet.

3. multi-functional blind guide according to claim 1 and 2 is characterized in that, warning circuit 2 adopts the integrated dual time base generation of monolithic IC circuit 2 (LF7556) to produce FM signal, analog call sound.

4. according to claim 1 or 3 described multi-functional blind guides, it is characterized in that, guide circuit 3 adopts reflecting type ultrasonic pulse ranging circuit, the voltage signal of obstacle distance is represented in output, through the V/T change-over circuit, be transformed into pulse signal, pulse frequency and obstacle distance be inversely proportional to (distance near more frequency high more), this pulse signal is controlled sound generation IC circuit 2 (LF7556) again and is produced acoustic impluse signal, this acoustic impluse signal power amplifier in functional switch 4 send receiver circuit 1.

5. multi-functional blind guide according to claim 3, it is characterized in that, guide circuit 3 adopts reflecting type ultrasonic pulse ranging circuit, the voltage signal of obstacle distance is represented in output, through the V/T change-over circuit, be transformed into pulse signal, pulse frequency and obstacle distance be inversely proportional to (distance near more frequency high more), this pulse signal is controlled sound generation IC circuit 2 (LF7556) again and is produced acoustic impluse signal, this acoustic impluse signal power amplifier in functional switch 4 send receiver circuit 1.