CN207520327U - A kind of intelligent guiding walking stick for blind person - Google Patents
A kind of intelligent guiding walking stick for blind person Download PDFInfo
- Publication number
- CN207520327U CN207520327U CN201720480912.2U CN201720480912U CN207520327U CN 207520327 U CN207520327 U CN 207520327U CN 201720480912 U CN201720480912 U CN 201720480912U CN 207520327 U CN207520327 U CN 207520327U
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- China
- Prior art keywords
- ultrasonic
- circuit
- microcontroller
- blind person
- ultrasonic sensor
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of intelligent guiding walking stick for blind person, and including minimum SCM system, the minimum SCM system includes microcontroller and the reset circuit, the crystal oscillating circuit that are connected with microcontroller；Ultrasonic wave transmitter and receiver circuit, the ultrasonic wave transmitter and receiver circuit includes ultrasonic sensor, microcontroller control ultrasonic sensor transmitting ultrasonic signal is detected, and ultrasonic signal detects barrier back reflection to ultrasonic sensor transmission signal strength；Voice alarm circuit, when the distance value that ultrasonic sensor measures is more than the alarming value of voice alarm circuit, the buzzer sounding alarm of microcontroller control voice warning circuit.Detection of the barrier into row distance and the information obstacle distance that the utility model can move ahead to blind person on road using ultrasonic wave are converted into auditory tone cues, and blind person can be according to the sound of prompting, to achieve the purpose that assisting blind is walked safely；Have the characteristics that at low cost, accuracy is high, practicability is good simultaneously.
Description
Technical field
The utility model is related to technical field of single chip microcomputer more particularly to a kind of intelligent guiding walking stick for blind person.
Background technology
With the development of society, increasing for the care dynamics of disadvantaged group in society, wherein blind person occupies very
A big part, and 95% information of the mankind in life process is obtained by vision.Blindman in dark world,
Great inconvenience is brought to their work, life and social activity, it is maximum during blindman that how safety, which is walked,
The problem of.Traditional walking stick has many inconvenience in, and the cycle of training of seeing-eye dog is long and higher price, is unfavorable for general
And.
Blind person is tapped on the ground with it during traditional walking stick use, can help to say the barrier that Ren Fa Now are close, it
Major defect is cannot to find barrier more a little further and hanging barrier.
Invention content
In view of the deficienciess of the prior art, the purpose of this utility model, which is that, provides a kind of intelligent guiding walking stick for blind person, adopt
Detection of the barrier into row distance that can be moved ahead on road to blind person with the ultrasonic wave and information obstacle distance is converted into
Auditory tone cues, blind person can be according to the sound of prompting, to achieve the purpose that assisting blind is walked safely.
To achieve these goals, the technical solution adopted in the utility model is such：A kind of intelligent guiding walking stick for blind person, including
Minimum SCM system, the minimum SCM system include microcontroller and the reset being connected with microcontroller electricity
Road, crystal oscillating circuit；
Ultrasonic wave transmitter and receiver circuit, the ultrasonic wave transmitter and receiver circuit include ultrasonic sensor, microcontroller
Control ultrasonic sensor transmitting ultrasonic signal is detected, and ultrasonic signal detects barrier back reflection and passed to ultrasonic wave
Sensor transmission signal strength；
Voice alarm circuit, it is single when the distance value that ultrasonic sensor measures is more than the alarming value of voice alarm circuit
The buzzer sounding alarm of piece machine control voice warning circuit.
As a preferred embodiment, the microcontroller uses STC89C51 series monolithics.
As a preferred embodiment, the ultrasonic sensor is using HY-SRF04 ultrasonic sensors.
As a preferred embodiment, the ultrasonic sensor includes ultrasonic transmitter, ultrasonic receiver, ultrasonic wave
Transmitter is used for the transmitting of ultrasonic signal, and ultrasonic receiver is used for the reception of ultrasonic signal.
As a preferred embodiment, the reset circuit is used to power on and be automatically reset.
As a preferred embodiment, the display circuit being connected with microcontroller is further included, for showing ultrasonic sensor
The distance measured.
As a preferred embodiment, the key circuit being connected with microcontroller is further included, for setting ultrasonic sensor
Measure apart from bound.
Compared with prior art, the beneficial effects of the utility model：Before the utility model can be to blind person using ultrasonic wave
Detection of the barrier of trade road into row distance and the information obstacle distance are converted into auditory tone cues, and blind person can root
According to the sound of prompting, to achieve the purpose that assisting blind is walked safely；Have that at low cost, accuracy is high, practicability is good simultaneously
Feature.
Description of the drawings
Fig. 1 is the functional block diagram of the utility model；
Fig. 2 is the circuit diagram of the utility model.
Specific embodiment
The utility model is further described with reference to specific embodiment.Following embodiment is only used for clearly
Illustrate the technical solution of the utility model, and cannot the scope of protection of the utility model be limited with this.
Embodiment：
As shown in Figs. 1-2, a kind of intelligent guiding walking stick for blind person, including
Minimum SCM system, the minimum SCM system include microcontroller and the reset being connected with microcontroller electricity
Road, crystal oscillating circuit；
Ultrasonic wave transmitter and receiver circuit, the ultrasonic wave transmitter and receiver circuit include ultrasonic sensor, microcontroller
Control ultrasonic sensor transmitting ultrasonic signal is detected, and ultrasonic signal detects barrier back reflection and passed to ultrasonic wave
Sensor transmission signal strength；
Voice alarm circuit, it is single when the distance value that ultrasonic sensor measures is more than the alarming value of voice alarm circuit
The buzzer sounding alarm of piece machine control voice warning circuit.
The preferably described microcontroller of the utility model uses STC89C51 series monolithics, and highest working clock frequency is
80MHz, piece include 8KB can the Flash read-only program memories of erasable 1000 times repeatedly, the MCS-51 of component compatibility standard
Instruction system, general 8 central processing units of integrated chip have small, at low cost, use flexibly, are easy to commercialization
Advantage.
More specifically, the ultrasonic sensor is using HY-SRF04 ultrasonic sensors；The ultrasonic wave passes
Sensor includes ultrasonic transmitter, ultrasonic receiver, and ultrasonic transmitter is used for the transmitting of ultrasonic signal, and ultrasonic wave receives
Device is used for the reception of ultrasonic signal.The center operating frequency of the ultrasonic sensor is 40KHz, when this frequency of deviation
When, its receiver sensitivity will be substantially reduced, and can specifically be learnt from the characteristic curve of ultrasonic sensor.Work as transmission
During 40KHz frequencies, received signal is most strong, therefore distance is also just maximum, and when deviateing, the distance of detection can also shorten.It is right
The drive signal of 40KHz is generated, there are many kinds of methods, and inductance, capacitive tank element can be selected to complete the generator of signal,
But its frequency stability is poor, is less susceptible to harmonize.In the present embodiment, generation electricity of the microcontroller as signal is selected
Because employing clock of the good crystal oscillator of frequency stability as system, there are high stability, therefore the drive generated in road
Dynamic signal is also more stable.
Basis for estimation of the microcontroller using the signal strength values that receive as barrier, because ultrasonic sensor is launched
Ultrasonic signal through the reflected ultrasonic signal of barrier power it is related with environmental factor, so to reach apart from small
Alarm when setting value.
More specifically, when blind-guiding stick starts ranging, the P01 ends of microcontroller generate the TTL of 10us, STC89C51 monolithics
Chance recycles in inside and generates 8 40KHz pulse signals, using internal automatic amplification, and can continue transmitting 200us, in P32
End can export a response signal while reception, this response signal can be with detecting distance proportion relation, so as to single
The P01 mouths of piece machine can generate the pulse signal of 40KHz to drive ultrasonic transmitter, to generate ultrasonic wave；Ultrasonic receiver
Use match with ultrasonic transmitter, it will ultrasonic wave modulation pulse transition conclusion of the business time variant voltage signal.
More specifically, start inside microcontroller while the ultrasonic transmitter for starting ultrasonic wave transmitter and receiver circuit
Timer T0, using timer count function just record ultrasonic wave launch time and receive the back wave time.Therefore, whenever
When receiving a ultrasonic reflections wave, the output terminal of ultrasonic wave transmitter and receiver circuit just produces a negative saltus step, produces
The request signal of one interruption, when microcontroller responds the request of this external interrupt, read access time is poor, calculates distance.
More specifically, the voice alarm circuit is by a light emitting diode D1, an operational amplifier Q5 and one
Loudspeaker LS1 compositions.
More specifically, the reset circuit is used to power on and be automatically reset, and in the moment of energization, is charged in R C circuits
There is positive pulse in Cheng Zhong, RST end, therefore make monolithic processor resetting, and the reset circuit is simple in structure, and interference is small, therefore use and power on certainly
It is dynamic to reset.The machine resets all to be realized by external circuit, so after working in crystal oscillator, once the RST in microcontroller
When 24 clock oscillation pulse more than high level are shown on pin, microcontroller will realize that init state resets.In order to protect
It demonstrate,proving and is reliably resetted, reset circuit in the present embodiment, RST must be high level, as long as RST level is constant, monolithic
Machine can be carried out cycle reset.
The utility model preferably further includes the display circuit being connected with microcontroller, for showing that ultrasonic sensor measures
Distance.
The utility model preferably further includes the key circuit being connected with microcontroller, for ultrasonic sensor to be set to measure
Apart from bound.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, under the premise of the utility model technical principle is not departed from, several improvement and deformation can also be made, these change
The scope of protection of the utility model is also should be regarded as into deformation.
Claims (7)
1. a kind of intelligent guiding walking stick for blind person, it is characterised in that：Including
Minimum SCM system, it is described minimum SCM system include microcontroller and be connected with microcontroller reset circuit,
Crystal oscillating circuit；
Ultrasonic wave transmitter and receiver circuit, the ultrasonic wave transmitter and receiver circuit include ultrasonic sensor, microcontroller control
Ultrasonic sensor transmitting ultrasonic signal is detected, and ultrasonic signal detects barrier back reflection to ultrasonic sensor
Transmission signal strength；
Voice alarm circuit, when the distance value that ultrasonic sensor measures is more than the alarming value of voice alarm circuit, microcontroller
The buzzer sounding alarm of control voice warning circuit.
2. a kind of intelligent guiding walking stick for blind person according to claim 1, it is characterised in that：The microcontroller is using STC89C51 series
Microcontroller.
3. a kind of intelligent guiding walking stick for blind person according to claim 1, it is characterised in that：The ultrasonic sensor using
HY-SRF04 ultrasonic sensors.
4. a kind of intelligent guiding walking stick for blind person according to claim 1, it is characterised in that：The ultrasonic sensor includes ultrasonic wave
Transmitter, ultrasonic receiver, ultrasonic transmitter are used for the transmitting of ultrasonic signal, and ultrasonic receiver is believed for ultrasonic wave
Number reception.
5. a kind of intelligent guiding walking stick for blind person according to claim 1, it is characterised in that：The reset circuit is automatic multiple using powering on
Position.
6. a kind of intelligent guiding walking stick for blind person according to claim 1, it is characterised in that：Further include the display being connected with microcontroller
Circuit, for showing distance that ultrasonic sensor measures.
7. a kind of intelligent guiding walking stick for blind person according to claim 1, it is characterised in that：Further include the button being connected with microcontroller
Circuit, for setting that ultrasonic sensor measures apart from bound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720480912.2U CN207520327U (en) | 2017-05-03 | 2017-05-03 | A kind of intelligent guiding walking stick for blind person |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720480912.2U CN207520327U (en) | 2017-05-03 | 2017-05-03 | A kind of intelligent guiding walking stick for blind person |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207520327U true CN207520327U (en) | 2018-06-22 |
Family
ID=62575442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720480912.2U Expired - Fee Related CN207520327U (en) | 2017-05-03 | 2017-05-03 | A kind of intelligent guiding walking stick for blind person |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207520327U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109966126A (en) * | 2019-05-11 | 2019-07-05 | 上海健康医学院 | A kind of two-dimensional ultrasound blind-guiding stick based on the stimulation of electric current dot matrix |
-
2017
- 2017-05-03 CN CN201720480912.2U patent/CN207520327U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109966126A (en) * | 2019-05-11 | 2019-07-05 | 上海健康医学院 | A kind of two-dimensional ultrasound blind-guiding stick based on the stimulation of electric current dot matrix |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180622 Termination date: 20200503 |