CN106353758A - Distance measurement apparatus of electric wheelchair - Google Patents
Distance measurement apparatus of electric wheelchair Download PDFInfo
- Publication number
- CN106353758A CN106353758A CN201610901445.6A CN201610901445A CN106353758A CN 106353758 A CN106353758 A CN 106353758A CN 201610901445 A CN201610901445 A CN 201610901445A CN 106353758 A CN106353758 A CN 106353758A
- Authority
- CN
- China
- Prior art keywords
- microprocessor
- signal
- ultrasonic transducer
- circuit
- display
- Prior art date
- 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.)
- Pending
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
- G01S15/06—Systems determining the position data of a target
- G01S15/08—Systems for measuring distance only
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Acoustics & Sound (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a distance measurement apparatus of an electric wheelchair. The distance measurement apparatus comprises an ultrasonic transducer, a transmission circuit, a receiving circuit, a microprocessor, a display and a warning circuit. The display, the warning circuit and the microprocessor are connected with one another, the microprocessor is connected with the ultrasonic transducer by virtue of the transmission circuit, and the ultrasonic transducer is connected with the microprocessor by virtue of the receiving circuit. An ultrasonic distance measurement principle of the electric wheelchair is that a pulse drive signal which is transmitted from an I/O port of the microprocessor drives the ultrasonic transducer to send out a signal, meanwhile, a timer begins the timing, when the signal is fed back by an obstacle to the ultrasonic receiver, the signal is amplified and reshaped to generate a pulse which is transmitted to the microprocessor to generate interruption, the microprocessor calls a distance operation subprogram to calculate the distance from the wheelchair to the obstacle, the calculated distance is displayed on the display, and a warning signal is generated. The distance measurement apparatus has the advantages of simplicity in structure, easiness in implementation, high measurement precision and the like.
Description
Technical field
The present invention relates to the technical field such as automatic detection and Based Intelligent Control, find range particularly to a kind of electric wheel-chair vehicle and fill
Put.
Background technology
Select to be suitable to the sensor of wheel-chair obstacle detection, need to meet the following requirements: 1. wheelchair truck position is not solid
Fixed it is desired to sensor detection signal transceiver；2. detection range can not be too little, and minimum also should be at several meters about；3. sensor
Cost can not be too high；4. response speed can not be excessively slow；5. to human body fanout free region.Distance measuring sensor has a lot at present, photoswitch
Diffuse-reflectance formula and infrared sensor be a kind of sensor integrating emitter and receptor, but detecting distance is usually 1
Rice is following, and detecting distance is short；When ccd adopts passive ranging, detect the positional information that the light around target just can obtain target, become
This is also not very very high, but when being in the environment of the insufficient lights such as night, is necessary for adopting initiative range measurement, is at this moment accomplished by extra
Light source.When using general light source, power consumption is just very big；When using laser, although laser type sensor can detecting distance big,
But require due to needing to install multiple sensors on wheel-chair and could meet detection, cost just improves.
Content of the invention
For the deficiencies in the prior art, invent a kind of electric wheel-chair vehicle range unit.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that
A kind of electric wheel-chair vehicle range unit, comprising: ultrasonic transducer, radiating circuit, receiving circuit, microprocessor, aobvious
Show device and warning circuit；Described display, described warning circuit are connected with described microprocessor, and described microprocessor is through described
Transmit-receive radio road is connected with described ultrasonic transducer, and described ultrasonic transducer is connected with described microprocessor through described receiving circuit.
Preferably, its range measurement principle is, the i/o mouth of microprocessor sends pulse drive signal and drives ultrasound wave to send letter
Number, meanwhile intervalometer starts timing, when run into barrier feed back signal to that ultrasonic receiver is amplified, shaping after produce
Pulse sends microprocessor to and produces to be interrupted, and microprocessor calls distance operation subprogram to calculate wheel-chair apart from barrier
Distance, shows over the display and produces alarm signal.
Preferably, described microprocessor is singlechip chip.
Technique scheme has the advantages that: it is simple that this device has structure, it is easy to accomplish, certainty of measurement height etc. is excellent
Point.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of description, below with presently preferred embodiments of the present invention and coordinate accompanying drawing describe in detail such as
Afterwards.The specific embodiment of the present invention is shown in detail in by following examples and its accompanying drawing.
Brief description
Fig. 1 is embodiment of the present invention structural representation.
Specific embodiment
Below in conjunction with the accompanying drawings the preferred embodiments of the present invention are described in detail.
As shown in figure 1, a kind of electric wheel-chair vehicle range unit, comprising: 1 ultrasonic transducer, 2 radiating circuits, 3
Receiving circuit, 4 microprocessors, 5 display and 6 warning circuits.Described display, described warning circuit and described microprocessor
Device is connected, and described microprocessor is connected with described ultrasonic transducer through described radiating circuit, and described ultrasonic transducer is through institute
State receiving circuit to be connected with described microprocessor.Electric wheel-chair vehicle ultrasonic ranging principle is that the i/o mouth of microprocessor sends pulse
Drive signal drive ultrasound wave send signal, meanwhile intervalometer start timing, when run into barrier feed back signal to ultrasonic
Ripple receptor is amplified, produce pulse after shaping and send microprocessor to and produce and interrupt, and microprocessor calls the sub- journey of distance operation
Sequence calculates the distance apart from barrier for the wheel-chair, shows over the display and produces alarm signal.This range unit has knot
Structure is simple, it is easy to accomplish, the advantages of certainty of measurement is high.
Ultrasonic ranging principle be microprocessor i/o mouth send pulse drive signal drive ultrasound wave send signal, with
This unison counter t0 starts counting up, when run into barrier feed back signal to that ultrasonic receiver is amplified, shaping after produce arteries and veins
Punching sends int0 to and produces to be interrupted, and microprocessor calls distance operation subprogram to calculate the distance apart from barrier for the wheel-chair,
Led shows.Because the 40khz square-wave signal amplitude from single-chip microcomputer only has 5v, can produce in transmitting procedure in sending signal
Raw decay.In order to improve measurement distance, here signal amplitude is amplified, to increase the transmit power of signal.In most of feelings
Under condition, ultrasound echo signal is very faint, the amplitude of converted electrical number also less it is necessary to using high-gain amplifying circuit.?
In this design, using tl084 as two-stage signal amplification chip, signal is amplified 50 times, amplified signal waveform is preferable.
Compared with charactron, it seems more professional, beautiful to liquid crystal display screen display module.LCDs with its Micro Energy Lose,
Small volume, display content enrich, ultra-thin light and handy, easy to use many advantages, such as, in communication, instrument and meter, electronic equipment, domestic
Increasingly it is widely applied in the low-power consumption application system such as electrical equipment.Liquid crystal display is selected to set as the output of the system
Standby, for showing obstacle distance and some other status information, concrete model is lcd1602,1602 character mode lcd moulds
The capacity of display of block is 2*16 character, substantially can meet the needs of the system.
Warning circuit is used for sending the information warnings such as acousto-optic with convenient use person preferably using electric wheelchair to user
Car.It is made up of a buzzer and one group of led light-emitting diodes, as long as by corresponding port and microprocessor i/o port during design
Connect.
A kind of electric wheel-chair vehicle the range unit above embodiment of the present invention being provided is described in detail, for this
The those skilled in the art in field, according to the thought of the embodiment of the present invention, all have in specific embodiments and applications and change
In place of change, in sum, this specification content should not be construed as to invention restriction, all according to design philosophy of the present invention done appoint
What changes all within protection scope of the present invention.
Claims (3)
1. a kind of electric wheel-chair vehicle range unit, comprising: ultrasonic transducer, radiating circuit, receiving circuit, microprocessor,
Display and warning circuit；Described display, described warning circuit are connected with described microprocessor, and described microprocessor is through described
Radiating circuit is connected with described ultrasonic transducer, and described ultrasonic transducer is through described receiving circuit and described microprocessor phase
Even.
2. a kind of electric wheel-chair vehicle range unit according to claim 1 is it is characterised in that its range measurement principle is, micro- place
The i/o mouth of reason device sends pulse drive signal and drives ultrasound wave to send signal, and meanwhile intervalometer starts timing, when running into barrier
Hindering thing to feed back signal to, ultrasonic receiver is amplified, produce pulse and send microprocessor to and produce after shaping and interrupt, microprocessor
Device calls distance operation subprogram to calculate the distance apart from barrier for the wheel-chair, shows and produce warning letter over the display
Number.
3. a kind of electric wheel-chair vehicle range unit according to claim 1 is it is characterised in that described microprocessor is monolithic
Movement piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610901445.6A CN106353758A (en) | 2016-10-16 | 2016-10-16 | Distance measurement apparatus of electric wheelchair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610901445.6A CN106353758A (en) | 2016-10-16 | 2016-10-16 | Distance measurement apparatus of electric wheelchair |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106353758A true CN106353758A (en) | 2017-01-25 |
Family
ID=57866705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610901445.6A Pending CN106353758A (en) | 2016-10-16 | 2016-10-16 | Distance measurement apparatus of electric wheelchair |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106353758A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1830413A (en) * | 2005-03-08 | 2006-09-13 | 中国科学院自动化研究所 | Control system of imbedded type intelligent wheel chair and its method |
| CN201055497Y (en) * | 2007-05-28 | 2008-05-07 | 罗来安 | Safety auxiliary device for visually impaired people walking |
| CN102549627A (en) * | 2009-09-25 | 2012-07-04 | 3M创新有限公司 | Hygiene monitoring systems and methods |
-
2016
- 2016-10-16 CN CN201610901445.6A patent/CN106353758A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1830413A (en) * | 2005-03-08 | 2006-09-13 | 中国科学院自动化研究所 | Control system of imbedded type intelligent wheel chair and its method |
| CN201055497Y (en) * | 2007-05-28 | 2008-05-07 | 罗来安 | Safety auxiliary device for visually impaired people walking |
| CN102549627A (en) * | 2009-09-25 | 2012-07-04 | 3M创新有限公司 | Hygiene monitoring systems and methods |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170125 |