CN105943324A - An ultrasonic wave-based walking stick for the blind - Google Patents
An ultrasonic wave-based walking stick for the blind Download PDFInfo
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- CN105943324A CN105943324A CN201610362525.9A CN201610362525A CN105943324A CN 105943324 A CN105943324 A CN 105943324A CN 201610362525 A CN201610362525 A CN 201610362525A CN 105943324 A CN105943324 A CN 105943324A
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- electric capacity
- speech chip
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- chip
- blind
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H3/00—Appliances for aiding patients or disabled persons to walk about
- A61H3/06—Walking aids for blind persons
- A61H3/061—Walking aids for blind persons with electronic detecting or guiding means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H3/00—Appliances for aiding patients or disabled persons to walk about
- A61H3/06—Walking aids for blind persons
- A61H3/068—Sticks for blind persons
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- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Pain & Pain Management (AREA)
- Physical Education & Sports Medicine (AREA)
- Rehabilitation Therapy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention provides an ultrasonic wave-based walking stick for the blind. The ultrasonic wave-based walking stick comprises an ultrasonic wave sensor, a photosensitive detection circuit, a single-chip microcomputer, an alarm circuit and a lighting circuit. The ultrasonic wave sensor emits an ultrasonic wave signal and receives an ultrasonic wave signal reflected back when the signal encounters a barrier; the single-chip microcomputer obtains the distance between the ultrasonic wave detection circuit and the barrier according to the duration from the time when the ultrasonic wave sensor emits the ultrasonic wave signal to the time when the ultrasonic wave sensor receives the ultrasonic wave signal reflected back when the signal encounters the barrier. When the distance between the ultrasonic wave sensor and the barrier is less than a safe distance, the alarm circuit generates vibration and gives voice prompt. The photosensitive detection circuit senses the intensity of external light, and when the illumination intensity is less than a set threshold value, the lighting circuit emits light.
Description
Technical field
The present invention relates to crutch for blind, particularly relate to a kind of blind-man crutch based on ultrasound wave.
Background technology
Crutch is a kind of simple apparatus assisting walking, it is common that one wooden or there is a handle on metal rod top, fills third leg when walking, thus keeps body steadiness.Also having now tripodia or four-footed, strengthen anti-skidding effect, have has also combined folding stool.Crutch is usually old man and people with disability uses.
Along with the progress of science and technology, market occurring in that crutch miscellaneous, be also specifically designed for what blind person used, but the blind-man crutch function occurred on market is more single, it is how many convenient not bring blind person's trip.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of blind-man crutch based on ultrasound wave, and it can detect road obstacle, and feed back to blind person, the most also can be walked to passerby by luminous prompting in the case of light is more weak.
For solving above-mentioned technical problem, the technical scheme is that
A kind of blind-man crutch based on ultrasound wave, including ultrasonic sensor, photosensitive detection circuit, single-chip microcomputer, circuit for alarming and lighting circuit, described ultrasound detection circuit sends ultrasonic signal, described ultrasound detection circuit receives meets the ultrasonic signal that barrier reflects, described single-chip microcomputer receives to described ultrasound detection circuit and meets time of ultrasonic signal that barrier reflects and obtain the distance described ultrasound detection circuit and barrier according to sending ultrasonic signal from described ultrasound detection circuit, when distance between described ultrasound detection circuit and barrier is less than safe distance, described circuit for alarming produces vibration and sends voice message, described photosensitive detection circuit sensing external light intensity, when intensity of illumination is less than when setting threshold value, described lighting circuit is luminous.
The measurement pin that triggers of described ultrasonic sensor electrically connects with the general purpose outputs mouth of described single-chip microcomputer, and the feedback pin of described ultrasonic sensor electrically connects with the universal input port of described single-chip microcomputer.
The model of described single-chip microcomputer is STC15W204S.
Described circuit for alarming includes the first audion and vibrating motor, and an output port of described single-chip microcomputer electrically connects with the base stage of described first audion, and the colelctor electrode of described first audion connects positive 4.5V voltage, and the emitter stage of described first audion drives described motor.
nullDescribed circuit for alarming includes speech chip、5th electric capacity、6th electric capacity、9th electric capacity、Loudspeaker and the second light emitting diode，Two output ports of described single-chip microcomputer are electrically connected the edging trigger playback end of described speech chip and the level triggers playback end of described speech chip，Described speech chip recording end electrically connect described 5th electric capacity to ground，The automatic growth control end of described speech chip electrically connects described 9th electric capacity to ground，The anode of described second light emitting diode connects positive 4.5V voltage，The ground terminal of described speech chip and described speech chip direct mode operation end between electrically connect the 6th electric capacity，Described speech chip digitally common with the simulation of described speech chip ground the most electrically，The power supply of described speech chip terminates positive 4.5V voltage，The concussion resistance terminal ground connection of described speech chip，The loudspeaker outfan of described speech chip drives described loudspeaker.
Described circuit for alarming includes the 7th electric capacity, 8th electric capacity, tenth electric capacity, microphone and record button, the microphone input of described speech chip electrically connects one end of described 7th electric capacity, the other end of described 7th electric capacity respectively with described microphone, one end of described tenth electric capacity and the recording indication end electrical connection of described speech chip, the microphone reference edge of described speech chip electrically connects one end of described 8th electric capacity, the other end of described 8th electric capacity respectively with described microphone, positive 4.5V voltage, the other end electrical connection of described tenth electric capacity, the recording end of described speech chip passes through described record button ground connection.
The model of described speech chip is ISD1820.
Described lighting circuit includes the first light emitting diode and the first resistance, and an output port of described single-chip microcomputer electrically connects with the negative electrode of described first light emitting diode, and the anode of described first light emitting diode electrically connects described first resistance to positive 4.5V voltage.
Described photosensitive detection circuit includes photoconductive resistance, when intensity of illumination dies down, the resistance of described photoconductive resistance becomes big, when the resistance of described photoconductive resistance is more than when setting threshold value, after the comparator of described single-chip microcomputer, described single-chip microcomputer output low level so that described first lumination of light emitting diode, reminds the passerby to walking.
Described blind-man crutch also includes power circuit, wherein said power circuit includes electrical insert, first switch, first electric capacity, second electric capacity, 3rd electric capacity, 4th electric capacity and voltage stabilizing chip, the outfan of described electrical insert is electrically connected one end of described first electric capacity, one end of described second electric capacity, the input of the outfan electrical connection described first switch extremely described voltage stabilizing chip of described electrical insert, the positive 4.5V voltage of connection put respectively by the outfan of described voltage stabilizing chip, one end of described 3rd electric capacity and one end of described 4th electric capacity, the ground terminal of described electrical insert, the other end of described second electric capacity, the other end of described first electric capacity, the ground terminal of described voltage stabilizing chip, the other end of described 3rd electric capacity and the other end end ground connection of described 4th electric capacity.
The Advantageous Effects that the technical solution adopted in the present invention is brought is:
Utilize ultrasonic technology that roadblock is detected, feed back to blind person by the form of vibration and voice broadcast, improve the wheel efficiency of blind person；
Photoconductive resistance is utilized to sense intensity of illumination, when intensity of illumination is less than a certain adjustable threshold value, can be luminous by LED, thus remind the passerby to walking.
Accompanying drawing explanation
Fig. 1 is the system block diagram of one embodiment of the invention；
Fig. 2 is the circuit diagram of one embodiment of the invention；
Fig. 3 is the workflow diagram of one embodiment of the invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the embodiments of the present invention are explained in detail.
Comprehensive reference Fig. 1 and Fig. 2, STC15W204S single-chip microcomputer respectively with ultrasonic sensor, photosensitive detection circuit, circuit for alarming and lighting circuit electrical connection, ultrasound detection circuit sends ultrasonic signal, ultrasound detection circuit receives meets the ultrasonic signal that barrier fires back, STC15W204S single-chip microcomputer sends, according to from ultrasonic sensor, the distance that ultrasonic signal obtains between ultrasound wave and barrier to its time receiving the ultrasonic signal that chance barrier fires back, when distance between ultrasound detection circuit and barrier is less than safe distance, circuit for alarming produces vibration and sends voice message.Photosensitive detection circuit sensing external light intensity, when intensity of illumination is less than when setting threshold value, and lighting circuit is luminous.
The general purpose outputs mouth p1.2 triggering measurement pin Trig and STC15W204S single-chip microcomputer of ultrasonic sensor electrically connects, and feedback pin Echo of ultrasonic sensor electrically connects with the universal input port p1.3 of STC15W204S single-chip microcomputer.
Circuit for alarming includes the first audion Q1 and vibrating motor B1, the base stage electrical connection of the one output port p1.0 and the first audion Q1 of STC15W204S single-chip microcomputer, the colelctor electrode of the first audion Q1 connects positive 4.5V voltage, the emitter stage of the first audion Q1 drives motor B1, when the base stage of the first audion Q1 is high level, vibrating motor B1 does not vibrates；When the base stage of the first audion Q1 is low level, its emitter and collector turns on, and vibrating motor B1 vibrates.
nullCircuit for alarming includes ISD1820 speech chip、5th electric capacity C5、6th electric capacity C6、9th electric capacity C9、Loudspeaker LS1 and the second light emitting diode D2，Two output port p3.6 and p3.7 of STC15W204S single-chip microcomputer are electrically connected the edging trigger playback end PLAYE of ISD1820 speech chip and the level triggers playback end PLAYL of ISD1820 speech chip，ISD1820 speech chip recording end REC electrical connection the 5th electric capacity C5 to ground，Automatic growth control end AGC electrical connection the 9th electric capacity C9 of ISD1820 speech chip is to ground，The anode of the second light emitting diode D2 connects positive 4.5V voltage，Digitally VSSD and the ISD1820 speech chip of ISD1820 speech chip direct mode operation end FT between electrically connect the 6th electric capacity C6，The simulation ground VSSA of digitally VSSD and the ISD1820 speech chip of ISD1820 speech chip is common electrically，The power end VCC of ISD1820 speech chip connects positive 4.5V voltage，The concussion resistance terminal ROSC ground connection of ISD1820 speech chip，Loudspeaker LS1 outfan SP+ and SP-of speech chip drives loudspeaker LS1.
Circuit for alarming includes the 7th electric capacity C7, 8th electric capacity C8, tenth electric capacity C10, microphone MK1 and record button S2, one end of microphone input MIC electrical connection the 7th electric capacity C7 of ISD1820 speech chip, the other end of the 7th electric capacity C7 respectively with microphone MK1, one end of tenth electric capacity C10 and the recording indication end RECLED electrical connection of ISD1820 speech chip, one end of microphone reference edge MICREF electrical connection the 8th electric capacity C8 of ISD1820 speech chip, the other end of the 8th electric capacity C8 respectively with microphone MK1, positive 4.5V voltage, the other end electrical connection of the tenth electric capacity C10, the recording end REC of ISD1820 speech chip passes through record button S2 ground connection.After ISD1820 speech chip powers on, recording prompt content can be revised by record button S2.Its step is to pin record button S2, and alignment microphone MK1 speaks, and unclamps record button S2, records complete, the recording substance that voice message next time is last.
Lighting circuit includes the first light emitting diode D1 and the first resistance R1, and the negative electrode electrical connection of an output port p1.1 and the first light emitting diode D1 of STC15W204S single-chip microcomputer, the anode of the first light emitting diode D1 electrically connects the first resistance R1 to positive 4.5V voltage.
Photosensitive detection circuit includes photoconductive resistance, when intensity of illumination dies down, the resistance of photoconductive resistance becomes big, when the resistance of photoconductive resistance is more than when setting threshold value, after the comparator of STC15W204S single-chip microcomputer, STC15W204S single-chip microcomputer output low level so that the first light emitting diode D1 is luminous, reminds the passerby to walking.
nullBlind-man crutch also includes power circuit，Wherein said power circuit includes electrical insert P1、First switch S1、First electric capacity C1、Second electric capacity C2、3rd electric capacity C3、4th electric capacity C4 and voltage stabilizing chip REG1117-5，No. 2 pins of the outfan of described electrical insert P1 are electrically connected one end of described first electric capacity C1、One end of described second electric capacity C2，The input IN of the described first switch S1 to described voltage stabilizing chip REG1117-5 of No. 2 pin electrical connections of the outfan of described electrical insert P1，The outfan OUT of described voltage stabilizing chip REG1117-5 puts the positive 4.5V voltage of connection respectively、One end of described 3rd electric capacity C3 and one end of described 4th electric capacity C4，No. 1 pin of the ground terminal of described electrical insert P1、The other end of described second electric capacity C2、The other end of described first electric capacity C1、The ground terminal GND of described voltage stabilizing chip REG1117-5、The other end of described 3rd electric capacity C3 and the other end end ground connection of described 4th electric capacity C4.
As it is shown on figure 3, first STC15W204S single-chip microcomputer is initialized.When the evening draws on, intensity of illumination is less than setting threshold value (being defined by photoconductive resistance), and the first light emitting diode D1 in lighting circuit is luminous；When being in daytime when, intensity of illumination is more than setting threshold value, and the first light emitting diode D1 of lighting circuit is the most luminous.Ultrasonic sensor is launched ultrasonic signal and is persistently detected barrier, and when running into barrier in detection range, then circuit for alarming can produce vibration and voice message, and reminding blind user changes direction of travel and takes care.
The above; being only the present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto, any those familiar with the art is in the technical scope that the invention discloses; the change that can readily occur in or replacement, all should contain within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with scope of the claims.
Claims (8)
1. a blind-man crutch based on ultrasound wave, it is characterised in that: include ultrasonic sensor, photosensitive inspection
Slowdown monitoring circuit, single-chip microcomputer, circuit for alarming and lighting circuit, described ultrasound detection circuit sends ultrasonic signal,
Described ultrasound detection circuit receives meets the ultrasonic signal that reflects of barrier, described single-chip microcomputer according to from
Described ultrasound detection circuit sends ultrasonic signal and receives chance barrier to described ultrasound detection circuit
The time of the ultrasonic signal reflected obtains the distance between described ultrasound detection circuit and barrier,
When distance between described ultrasound detection circuit and barrier is less than safe distance, described circuit for alarming produces
Voice message is vibrated and is sent in life, and described photosensitive detection circuit sensing external light intensity, when intensity of illumination is little
In time setting threshold value, described lighting circuit is luminous.
2. blind-man crutch as claimed in claim 1, it is characterised in that: the triggering of described ultrasonic sensor
Measure pin to electrically connect with the general purpose outputs mouth of described single-chip microcomputer, the feedback pin of described ultrasonic sensor
Electrically connect with the universal input port of described single-chip microcomputer.
3. blind-man crutch as claimed in claim 1, it is characterised in that: the model of described single-chip microcomputer is
STC15W204S。
4. blind-man crutch as claimed in claim 1, it is characterised in that: described circuit for alarming includes the one or three
Pole pipe and vibrating motor, an output port of described single-chip microcomputer electrically connects with the base stage of described first audion,
The colelctor electrode of described first audion connects positive 4.5V voltage, and the emitter stage of described first audion drives described
Motor.
5. blind-man crutch as claimed in claim 1, it is characterised in that: described circuit for alarming includes voice core
Sheet, the 5th electric capacity, the 6th electric capacity, the 9th electric capacity, loudspeaker and the second light emitting diode, described single-chip microcomputer
Two output ports are electrically connected the edging trigger playback end of described speech chip and described speech chip
Level triggers playback end, described speech chip recording end electrically connect described 5th electric capacity to ground, institute's predicate
The automatic growth control end of sound chip electrically connects described 9th electric capacity to ground, the sun of described second light emitting diode
Pole connects positive 4.5V voltage, the ground terminal of described speech chip and described speech chip direct mode operation end it
Between electrically connect the 6th electric capacity, being digitally jointly electrically connected with the simulation of described speech chip ground of described speech chip
Ground connection, the power supply of described speech chip terminates positive 4.5V voltage, the concussion resistance termination of described speech chip
Ground, the loudspeaker outfan of described speech chip drives described loudspeaker.
6. blind-man crutch as claimed in claim 5, it is characterised in that: described circuit for alarming includes the 7th electricity
Appearance, the 8th electric capacity, the tenth electric capacity, microphone and record button, the microphone input of described speech chip is electrically connected
Connect one end of described 7th electric capacity, the other end of described 7th electric capacity respectively with described microphone, described tenth electricity
The one end held and the recording indication end electrical connection of described speech chip, the microphone reference edge electricity of described speech chip
Connect one end of described 8th electric capacity, the other end of described 8th electric capacity respectively with described microphone, positive 4.5V
Voltage, the other end electrical connection of described tenth electric capacity, the recording end of described speech chip is pressed by described recording
Button ground connection.
7. blind-man crutch as claimed in claim 1, it is characterised in that: the model of described speech chip is
ISD1820。
8. blind-man crutch as claimed in claim 1, it is characterised in that: described lighting circuit includes first
The negative electrode of optical diode and the first resistance, an output port of described single-chip microcomputer and described first light emitting diode
Electrical connection, the anode of described first light emitting diode electrically connects described first resistance to positive 4.5V voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610362525.9A CN105943324A (en) | 2016-05-26 | 2016-05-26 | An ultrasonic wave-based walking stick for the blind |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610362525.9A CN105943324A (en) | 2016-05-26 | 2016-05-26 | An ultrasonic wave-based walking stick for the blind |
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| Publication Number | Publication Date |
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| CN105943324A true CN105943324A (en) | 2016-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610362525.9A Pending CN105943324A (en) | 2016-05-26 | 2016-05-26 | An ultrasonic wave-based walking stick for the blind |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106344358A (en) * | 2016-10-31 | 2017-01-25 | 榆林学院 | Control circuit applied to safety crutch for blind person |
| CN107898608A (en) * | 2017-12-28 | 2018-04-13 | 南京工程学院 | A kind of non-touching formula infrared induction guide-stick for blind people |
| CN109498032A (en) * | 2018-11-15 | 2019-03-22 | 昆明理工大学 | A kind of intelligence BOLD contrast |
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| JPH1043263A (en) * | 1996-08-07 | 1998-02-17 | Fueroo Kogyo:Kk | Walking aid for blind person |
| CN1748662A (en) * | 2005-10-10 | 2006-03-22 | 暨南大学 | Intelligent blind person walking guide instrument and its walking guide method |
| CN201164539Y (en) * | 2008-03-21 | 2008-12-17 | 北京联合大学 | Walking sticks with obstacle detection function |
| CN101829006A (en) * | 2010-05-21 | 2010-09-15 | 上海市七宝中学 | Blind guiding stick |
| CN103637901A (en) * | 2013-12-27 | 2014-03-19 | 哈尔滨工业大学 | Blind guide crutch based on ultrasonic ranging |
| CN104173175A (en) * | 2014-09-11 | 2014-12-03 | 青岛黄海学院 | Wearable intelligent blind guiding device |
| CN204208002U (en) * | 2014-11-13 | 2015-03-18 | 皖西学院 | Based on the intelligent sound the eyes of the blind of STC15F2K61S2 single-chip microcomputer |
| CN104644399A (en) * | 2014-12-01 | 2015-05-27 | 蒲斌 | Intelligent infrared guide system |
-
2016
- 2016-05-26 CN CN201610362525.9A patent/CN105943324A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1043263A (en) * | 1996-08-07 | 1998-02-17 | Fueroo Kogyo:Kk | Walking aid for blind person |
| CN1748662A (en) * | 2005-10-10 | 2006-03-22 | 暨南大学 | Intelligent blind person walking guide instrument and its walking guide method |
| CN201164539Y (en) * | 2008-03-21 | 2008-12-17 | 北京联合大学 | Walking sticks with obstacle detection function |
| CN101829006A (en) * | 2010-05-21 | 2010-09-15 | 上海市七宝中学 | Blind guiding stick |
| CN103637901A (en) * | 2013-12-27 | 2014-03-19 | 哈尔滨工业大学 | Blind guide crutch based on ultrasonic ranging |
| CN104173175A (en) * | 2014-09-11 | 2014-12-03 | 青岛黄海学院 | Wearable intelligent blind guiding device |
| CN204208002U (en) * | 2014-11-13 | 2015-03-18 | 皖西学院 | Based on the intelligent sound the eyes of the blind of STC15F2K61S2 single-chip microcomputer |
| CN104644399A (en) * | 2014-12-01 | 2015-05-27 | 蒲斌 | Intelligent infrared guide system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106344358A (en) * | 2016-10-31 | 2017-01-25 | 榆林学院 | Control circuit applied to safety crutch for blind person |
| CN107898608A (en) * | 2017-12-28 | 2018-04-13 | 南京工程学院 | A kind of non-touching formula infrared induction guide-stick for blind people |
| CN109498032A (en) * | 2018-11-15 | 2019-03-22 | 昆明理工大学 | A kind of intelligence BOLD contrast |
| CN109498032B (en) * | 2018-11-15 | 2021-06-18 | 昆明理工大学 | Intelligent oximeter |
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Application publication date: 20160921 |
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