CN108983244A - A kind of Ultrasonic Range Finder for Parking auxiliary system - Google Patents
A kind of Ultrasonic Range Finder for Parking auxiliary system Download PDFInfo
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- CN108983244A CN108983244A CN201811157135.3A CN201811157135A CN108983244A CN 108983244 A CN108983244 A CN 108983244A CN 201811157135 A CN201811157135 A CN 201811157135A CN 108983244 A CN108983244 A CN 108983244A
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- 238000005259 measurement Methods 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims abstract description 5
- 238000002604 ultrasonography Methods 0.000 claims abstract description 4
- 239000003990 capacitor Substances 0.000 claims description 41
- 239000013078 crystal Substances 0.000 claims description 9
- 230000007717 exclusion Effects 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
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- 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
- G01S15/88—Sonar systems specially adapted for specific applications
- G01S15/93—Sonar systems specially adapted for specific applications for anti-collision purposes
- G01S15/931—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles
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- 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
-
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/521—Constructional features
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a kind of Ultrasonic Range Finder for Parking auxiliary systems, including power module, control module, ultrasonic distance measuring module, alarm module, display module, key module and drive module；The power module is connect with the control module, ultrasonic distance measuring module, alarm module, drive module respectively；The control module respectively with the ultrasonic distance measuring module, alarm module, display module, key module and drive module；The drive module is connect with the display module；Component number used in the present invention is more simplified, and is capable of forming more compact PCB construction, is reduced occupied space, improves economic results in society；Ultrasound examination range is 0.02-5.5M, and detection range is wider, while the alarm distance of alarm module can be set in key module；Using integrated circuit cooperation triode driving display module display measurement distance, further increase the display brightness of charactron, display is more intuitive, to provide better booster action when reversing.
Description
Technical field
The present invention relates to reversing ancillary technique field more particularly to a kind of Ultrasonic Range Finder for Parking auxiliary systems.
Background technique
Component used in current Ultrasonic Range Finder for Parking auxiliary system is excessive, and more too fat to move, occupied space is larger,
Cost is also increased simultaneously；Configure it is inflexible, it is inconvenient for use.
Therefore, the prior art is defective, needs to improve.
Summary of the invention
The present invention provides a kind of Ultrasonic Range Finder for Parking auxiliary system, the above problem of solution.
To solve the above problems, technical solution provided by the invention is as follows:
A kind of Ultrasonic Range Finder for Parking auxiliary system, including power module, control module, ultrasonic distance measuring module, alarm module,
Display module, key module and drive module；The power module respectively with the control module, ultrasonic distance measuring module, report
Alert module, drive module connection；The control module respectively with the ultrasonic distance measuring module, alarm module, display module, press
Key module and drive module；The drive module is connect with the display module.
Preferred technical solution, the power module include capacitor C4-C5, switch SZ and power supply P1；The power supply P1's
1st end is connect with the 1st pin of the switch SZ；The 3rd pin of the switch SZ first end with the capacitor C4-C5 respectively
Connection；The power supply P1 the 2nd, 3 ends, the capacitor C4-C5 second end be grounded；The voltage of the power supply P1 is DC5V.
Preferred technical solution, the control module include resistance R14, exclusion RP, capacitor C1-C3, crystal oscillator Y1 and integrate
Circuit U 1.
Preferred technical solution, the first end of the capacitor C4 are connect with the first end of the capacitor C3；The capacitor C3
First end connect respectively with the 31st pin of the 1st stitch of the exclusion RP, the integrated circuit U1；The of the capacitor C3
Two ends are connect with the 9th pin of the first end of the resistance R14, the integrated circuit U1 respectively；The second end of the resistance R14
Ground connection；The 19th pin of the integrated circuit U1 is connect with the first end of the first end of the capacitor C1, the crystal oscillator Y1 respectively；
The 18th pin of the integrated circuit U1 is connect with the second end of the first end of the capacitor C2, the crystal oscillator Y1 respectively；It is described
The second end of capacitor C1-C2 is grounded；The 32-39 pin of the integrated circuit U1 successively 2- with the exclusion RP respectively
The connection of 9 stitch；The model STC89C52 of the integrated circuit U1.
Preferred technical solution, the ultrasonic distance measuring module include integrated circuit U4；The first end of the capacitor C4 with
The 1st pin of the integrated circuit U4 connects；The 2-3 pin of the integrated circuit U4 successively respectively with the integrated circuit U1
13-12 pin connection；The 4th pin of the integrated circuit U4 is grounded；The model HC-SR04 of the integrated circuit U4.
Preferred technical solution, the alarm module include resistance R13, R15, diode D1, triode Q5 and buzzer
LS1；The first end of the capacitor C4 is connect with the emitter of the triode Q5；The second end of the resistance R13 and the collection
It is connected at the 21st pin of circuit U 1；The first end of the resistance R13 is connect with the base stage of the triode Q5；The triode
The collector of Q5 is connect with the first end of the first end of the resistance R15, the buzzer LS1 respectively；The of the resistance R15
Two ends are connect with the anode of the diode D1；The second end of the buzzer LS1, the diode D1 cathode be grounded.
Preferred technical solution, the diode D1 are red light emitting diodes；The model 9012 of the triode Q5；
The buzzer LS1 is electromagnetic buzzer.
Preferred technical solution, the key module include button switch S1-S3；The second of the button switch S1-S3
End is successively connect with the 5-7 pin of the integrated circuit U1 respectively；The first end of the button switch S1-S3 is grounded；Institute
Stating button switch S1 is plus key；The button switch S2 is to subtract key；The button switch S3 is determination key；The button switch
S1-S3 is for setting alarm detection range.
Preferred technical solution, the drive module include resistance R1-R12, triode Q1-Q4 and integrated circuit U 2；Institute
The first end for stating capacitor C4 is connect with the 11st pin of the integrated circuit U2；The 39-32 pin of the integrated circuit U1 according to
It is secondary to be connect respectively with the 2-9 pin of the integrated circuit U2；The 1-4 pin of the integrated circuit U1 successively respectively with it is described
The second end of resistance R1-R4 connects；The 1st pin of the integrated circuit U2 is grounded；The 19-12 pin of the integrated circuit U2
Successively it is connect respectively with the first end of the resistance R5-R12；The first end of the resistance R1-R4 successively respectively with three pole
The base stage of pipe Q1-Q4 connects；The collector of the triode Q1-Q4 is grounded；The model of the integrated circuit U2
74HC573。
Preferred technical solution, the display module include integrated circuit U3；The emitter of the triode Q1-Q4 is successively
It is connect respectively with the 12nd of the integrated circuit U3,9,8,6 pins；The second end of the resistance R5-R12 successively respectively with it is described
Integrated circuit U3 the 11st, 7,4,2,1,10,5,3 pins connection；The integrated circuit U3 is four LED charactrons.
Beneficial effect compared with the existing technology is that using the above scheme, component number used in the present invention is more
It simplifies, is capable of forming more compact PCB construction, reduces occupied space, reduce costs, improve economic results in society；
Ultrasound examination range is 0.02-5.5M, and detection range is wider, at the same key module can be set the alarm of alarm module away from
From；Using integrated circuit cooperation triode driving display module display measurement distance, mention the display brightness of charactron further
Height, display is more intuitive, to provide better booster action when reversing.
Detailed description of the invention
Illustrate embodiment or technical solution in the prior art in order to clearer, it below will be to embodiment or the prior art
The required attached drawing used is briefly described in description, it is clear that, the accompanying drawings in the following description is only some realities invented
Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of Ultrasonic Range Finder for Parking auxiliary system functional block diagram of the invention；
Fig. 2 is a kind of Ultrasonic Range Finder for Parking circuit of auxiliary system schematic diagram of the invention；
Fig. 3 is a kind of Ultrasonic Range Finder for Parking auxiliary system main program flow chart of the invention；
Fig. 4 is a kind of Ultrasonic Range Finder for Parking auxiliary system display subroutine flow chart of the invention；
Fig. 5 is a kind of Ultrasonic Range Finder for Parking auxiliary system alarm subroutine flow chart of the invention；
Fig. 6 is a kind of Ultrasonic Range Finder for Parking auxiliary system key subroutine flow chart of the invention.
1- power module；2- control module；3- ultrasonic distance measuring module；4- alarm module；5- display module；6- key mould
Block；7- drive module.
Specific embodiment
To facilitate the understanding of the present invention, in the following with reference to the drawings and specific embodiments, the present invention will be described in more detail.
A better embodiment of the invention is given in the attached drawing.But the invention can be realized in many different forms, and unlimited
In this specification described embodiment.On the contrary, purpose of providing these embodiments is makes to the disclosure
Understand more thorough and comprehensive.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term used in this specification " fixation ", " integrated molding ",
For illustrative purposes only, the similar unit of structure is to identical label in the figure for "left", "right" and similar statement
Mark.
Unless otherwise defined, technical and scientific term all used in this specification is led with technology of the invention is belonged to
The normally understood meaning of the technical staff in domain is identical.Used term is only in the description of the invention in this specification
The purpose of description specific embodiment is not intended to the limitation present invention.
As shown in figures 1 to 6, one embodiment of the present of invention is:
A kind of Ultrasonic Range Finder for Parking auxiliary system, including power module 1, control module 2, ultrasonic distance measuring module 3, alarm mould
Block 4, display module 5, key module 6 and drive module 7；The power module 1 respectively with the control module 2, ultrasound
It is connected away from module 3, alarm module 4, drive module 7；The control module 2 respectively with the ultrasonic distance measuring module 3, alarm mould
Block 4, display module 5, key module 6 and drive module 7；The drive module 7 is connect with the display module 5.
The power module 1 includes capacitor C4-C5, switch SZ and power supply P1；
The 1st end of the power supply P1 is connect with the 1st pin of the switch SZ；The 3rd pin of the switch SZ respectively with it is described
The first end of capacitor C4-C5 connects；The power supply P1 the 2nd, 3 ends, the capacitor C4-C5 second end be grounded；The electricity
The voltage of source P1 is DC5V.
The control module 2 includes resistance R14, exclusion RP, capacitor C1-C3, crystal oscillator Y1 and integrated circuit U 1；
The first end of the capacitor C4 is connect with the first end of the capacitor C3；
The first end of the capacitor C3 is connect with the 31st pin of the 1st stitch of the exclusion RP, the integrated circuit U1 respectively；
The second end of the capacitor C3 is connect with the 9th pin of the first end of the resistance R14, the integrated circuit U1 respectively；It is described
The second end of resistance R14 is grounded；The 19th pin of the integrated circuit U1 respectively with the first end of the capacitor C1, the crystal oscillator
The first end of Y1 connects；The 18th pin of the integrated circuit U1 respectively with the first end of the capacitor C2, the crystal oscillator Y1
Second end connection；The second end of the capacitor C1-C2 is grounded；The 32-39 pin of the integrated circuit U1 successively respectively with
The 2-9 stitch of the exclusion RP connects；The model STC89C52 of the integrated circuit U1.
The ultrasonic distance measuring module 3 includes integrated circuit U4；
The first end of the capacitor C4 is connect with the 1st pin of the integrated circuit U4；The 2-3 pin of the integrated circuit U4
Successively it is connect respectively with the 13-12 pin of the integrated circuit U1；The 4th pin of the integrated circuit U4 is grounded；The collection
At the model HC-SR04 of circuit U 4.
The alarm module 4 includes resistance R13, R15, diode D1, triode Q5 and buzzer LS1；
The first end of the capacitor C4 is connect with the emitter of the triode Q5；The second end of the resistance R13 and the collection
It is connected at the 21st pin of circuit U 1；The first end of the resistance R13 is connect with the base stage of the triode Q5；The triode
The collector of Q5 is connect with the first end of the first end of the resistance R15, the buzzer LS1 respectively；The of the resistance R15
Two ends are connect with the anode of the diode D1；The second end of the buzzer LS1, the diode D1 cathode be grounded；
The diode D1 is red light emitting diodes；The model 9012 of the triode Q5；The buzzer LS1 is electromagnetism
Formula buzzer.
The key module 6 includes button switch S1-S3；
The second end of the button switch S1-S3 is successively connect with the 5-7 pin of the integrated circuit U1 respectively；The button
The first end of switch S1-S3 is grounded；The button switch S1 is plus key；The button switch S2 is to subtract key；The button is opened
Pass S3 is determination key；The button switch S1-S3 is for setting alarm detection range.
The drive module 7 includes resistance R1-R12, triode Q1-Q4 and integrated circuit U 2；
The first end of the capacitor C4 is connect with the 11st pin of the integrated circuit U2；The 39-32 of the integrated circuit U1
Pin is successively connect with the 2-9 pin of the integrated circuit U2 respectively；The 1-4 pin of the integrated circuit U1 is successively distinguished
It is connect with the second end of the resistance R1-R4；
The 1st pin of the integrated circuit U2 is grounded；The 19-12 pin of the integrated circuit U2 successively respectively with the resistance
The first end of R5-R12 connects；The first end of the resistance R1-R4 is successively connect with the base stage of the triode Q1-Q4 respectively；
The collector of the triode Q1-Q4 is grounded；The model 74HC573 of the integrated circuit U2.
The display module 5 includes integrated circuit U3；
The emitter of the triode Q1-Q4 is successively connect with the 12nd of the integrated circuit U3,9,8,6 pins respectively；It is described
The second end of resistance R5-R12 is successively connect with the 11st of the integrated circuit U3,7,4,2,1,10,5,3 pins respectively；It is described
Integrated circuit U3 is four LED charactrons.
Ultrasonic distance measuring module 3 can provide the contactless distance sensing function of 2cm-400cm, and range accuracy may be up to
3mm, module include ultrasonic transmitter, receiver and control circuit.Its basic functional principle:
(1) ranging is triggered using I/O port TRIG, at least high level signal of 10us；
(2) module sends the square wave of 8 40khz automatically, has detected whether signal return automatically；
(3) there is signal return, a high level is exported by I/O port ECH0, high level duration is exactly ultrasonic wave from transmitting
To the time of return.Measuring distance=(the high level time * velocity of sound/340M/S)/2；
(4) when TRIG is from 0- > 1, master board starting, as overtime 10ms, still there is not 0 signal of 150us in ECH0,
Indicate no obstacle.
This module performance is stablized, and measure distance is accurate, main feature:
(1) superminiature is only equivalent to two transmittings, and the area for receiving head cannot be small again；
(2) non-blind area (larger at triangle error in 10mm, simply can be as 0 processing)；
(3) reaction speed is fast, the measurement period of 10ms, it is not easy to lose high-speed target；
(4) emitting head, reception head abuts and measured target substantially straight relationship；
(5) there is LED indication in module, facilitate observation and test.
It is STC89C51 single-chip microcontroller used by control module 2, is that a kind of band 4k byte flashing programmable and erasable is read-only
The microprocessor of the low-voltage of memory, high-performance COMOS8, the device have 40 pins, and fast speed is cheap, burning side
Just, it can be downloaded by serial ports, can also realize online programming, using ATMEL high density nonvolatile storage manufacturing technology system
It makes, it is mutually compatible with the MCS-51 instruction set and output pin of industrial standard.
Display module 5 show using LED charactrons, when be more than set apart from when, the buzzer of alarm module 4 with
LED can realize warning function and can realize the adjustment of limited distance by key module 6.
Ultrasonic distance measurement is realized by means of ultrasonic pulse-echo transit time method, if ultrasonic pulse is by sensor
It being issued to and receives the time experienced as t, the aerial spread speed of ultrasonic wave is c, then from sensor to target object
Distance D can be found out with following formula: D=ct/2.
Basic principle: emitted device, which is launched, is about 6mm, and frequency is the ultrasonic signal of 40khz.This signal is anti-by object
It is emitted back towards the energy converter for receiving that head is substantially a kind of piezoelectric effect to be received by reception head.It generates mV grades after receiving signal
Weak voltage signals.
Single-chip microcontroller keyboard has stand-alone keypad and two kinds of matrix keyboard: only connect on each I/O mouth of stand-alone keypad one by
Key, another termination power of key or ground connection (typically grounded), this connection program is fairly simple and system is more stable；And square
Configuration keyboard-type connection program is more complicated, but the I/O occupied is few.It needs to have selected free-standing key here according to the design
Disk connection.The implementation method of independent keyboard is the level height using single-chip processor i/o mouth reading-port to determine whether there is key to press
Under.One end of normally opened key is grounded, another one I/O mouthfuls of termination is placed in high level for this I/O mouthfuls when program starts, usually
I/O mouthfuls of protection high level when no key pressing.When a key is pressed, it is low level that this I/O mouthfuls, which forces I/O mouthfuls with ground short circuit,.Key
After release, the pull-up resistor inside single-chip microcontroller makes I/O mouthfuls to still maintain high level.What we to be done is exactly to search in a program
This I/O mouthfuls of level state can understand whether we have actuation of keys.It is related to when with single-chip microcontroller to Data inputing
And to an important process, that is, the Key dithering of keyboard.Shake said herein is mechanical shake, is when keyboard is not
It is not that we pass through in key it is noted that avoiding by the unstable normal phenomenon of level generated to the critical zone pressed
's.This shake is general, and the shaky time of this unstable level is too fast for people between 10 ~ 200 milliseconds, and for
Clock be microsecond single-chip microcontroller for be then long slowly.Hardware Key dithering is exactly to be handled in addition with partial circuit jitter section,
Software Key dithering does not remove shake instead of, keeps away the time of jitter section, waits keyboards to stabilize and handles again it.So selecting here
Software Key dithering is selected, realization method is first to search key to be delayed 10 ~ 200 milliseconds immediately when there is low level to occur to avoid shaking
(classical value be 20 milliseconds) reads I/O mouthful values, when value this time is low level if it is 1 expression again after delay
Between less than 10 ~ 200 milliseconds, be considered as interference signal.It then indicates to call corresponding processing by key pressing when the value of reading is 0
Program.
The major function of main program is responsible for the display, reading and the measurement distance value for handling HC-RS04 of distance, by keying
Effective distance limitation processed, when the value of measurement is more than preset value, buzzer sounding alarm.
The major function of display data subprogram is exactly that the result after ultrasonic wave module is measured is disposed through single-chip microcontroller
Distance be shown on charactron.
The major function of alarm subprogram is can to make buzzer sounding when distance value is more than early warning value to reach report
Alert purpose.
It should be noted that above-mentioned each technical characteristic continues to be combined with each other, the various embodiments not being enumerated above are formed,
It is accordingly to be regarded as the range of description of the invention record；Also, for those of ordinary skills, it can add according to the above description
To improve or convert, and all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (10)
1. a kind of Ultrasonic Range Finder for Parking auxiliary system, which is characterized in that including power module, control module, ultrasonic distance measurement
Module, alarm module, display module, key module and drive module；The power module respectively with the control module, ultrasound
Wave range finder module, alarm module, drive module connection；The control module respectively with the ultrasonic distance measuring module, alarm mould
Block, display module, key module and drive module；The drive module is connect with the display module.
2. a kind of Ultrasonic Range Finder for Parking auxiliary system according to claim 1, which is characterized in that the power module packet
Include capacitor C4-C5, switch SZ and power supply P1；The 1st end of the power supply P1 is connect with the 1st pin of the switch SZ；It is described to open
The 3rd pin for closing SZ is connect with the first end of the capacitor C4-C5 respectively；The power supply P1 the 2nd, 3 ends, the capacitor C4-
The second end of C5 is grounded；The voltage of the power supply P1 is DC5V.
3. a kind of Ultrasonic Range Finder for Parking auxiliary system according to claim 2, which is characterized in that the control module packet
Include resistance R14, exclusion RP, capacitor C1-C3, crystal oscillator Y1 and integrated circuit U 1.
4. a kind of Ultrasonic Range Finder for Parking auxiliary system according to claim 3, which is characterized in that the of the capacitor C4
One end is connect with the first end of the capacitor C3；The first end of the capacitor C3 respectively with the 1st stitch of the exclusion RP, described
The 31st pin of integrated circuit U1 connects；The second end of the capacitor C3 respectively with the first end of the resistance R14, described integrated
9th pin of circuit U 1 connects；The second end of the resistance R14 is grounded；The 19th pin of the integrated circuit U1 respectively with institute
State first end, the connection of the first end of the crystal oscillator Y1 of capacitor C1；The 18th pin of the integrated circuit U1 respectively with the electricity
Hold first end, the connection of the second end of the crystal oscillator Y1 of C2；The second end of the capacitor C1-C2 is grounded；The integrated circuit
The 32-39 pin of U1 is successively connect with the 2-9 stitch of the exclusion RP respectively；The model of the integrated circuit U1
STC89C52。
5. a kind of Ultrasonic Range Finder for Parking auxiliary system according to claim 4, which is characterized in that the ultrasonic distance measurement
Module includes integrated circuit U4；The first end of the capacitor C4 is connect with the 1st pin of the integrated circuit U4；The integrated electricity
The 2-3 pin of road U4 is successively connect with the 13-12 pin of the integrated circuit U1 respectively；The 4th of the integrated circuit U4
Pin ground connection；The model HC-SR04 of the integrated circuit U4.
6. a kind of Ultrasonic Range Finder for Parking auxiliary system according to claim 5, which is characterized in that the alarm module packet
Include resistance R13, R15, diode D1, triode Q5 and buzzer LS1；The first end of the capacitor C4 is with the triode Q5's
Emitter connection；The second end of the resistance R13 is connect with the 21st pin of the integrated circuit U1；The of the resistance R13
One end is connect with the base stage of the triode Q5；The collector of the triode Q5 respectively with the first end of the resistance R15, institute
State the first end connection of buzzer LS1；The second end of the resistance R15 is connect with the anode of the diode D1；The buzzing
The second end of device LS1, the diode D1 cathode be grounded.
7. a kind of Ultrasonic Range Finder for Parking auxiliary system according to claim 6, which is characterized in that the diode D1 is
Red light emitting diodes；The model 9012 of the triode Q5；The buzzer LS1 is electromagnetic buzzer.
8. a kind of Ultrasonic Range Finder for Parking auxiliary system according to claim 7, which is characterized in that the key module packet
Include button switch S1-S3；The second end of the button switch S1-S3 successively 5-7 pin with the integrated circuit U1 respectively
Connection；The first end of the button switch S1-S3 is grounded；The button switch S1 is plus key；The button switch S2 is to subtract
Key；The button switch S3 is determination key；The button switch S1-S3 is for setting alarm detection range.
9. a kind of Ultrasonic Range Finder for Parking auxiliary system according to claim 8, which is characterized in that the drive module packet
Include resistance R1-R12, triode Q1-Q4 and integrated circuit U 2；The 11st of the first end of the capacitor C4 and the integrated circuit U2
Pin connection；The 39-32 pin of the integrated circuit U1 is successively connect with the 2-9 pin of the integrated circuit U2 respectively；
The 1-4 pin of the integrated circuit U1 is successively connect with the second end of the resistance R1-R4 respectively；The integrated circuit U2's
1st pin ground connection；The 19-12 pin of the integrated circuit U2 is successively connect with the first end of the resistance R5-R12 respectively；
The first end of the resistance R1-R4 is successively connect with the base stage of the triode Q1-Q4 respectively；The collection of the triode Q1-Q4
Electrode is grounded；The model 74HC573 of the integrated circuit U2.
10. a kind of Ultrasonic Range Finder for Parking auxiliary system according to claim 9, which is characterized in that the display module
Including integrated circuit U3；The emitter of the triode Q1-Q4 is successively managed with the 12nd, 9,8, the 6 of the integrated circuit U3 respectively
Foot connection；The second end of the resistance R5-R12 is successively managed with the 11st, 7,4,2,1,10,5, the 3 of the integrated circuit U3 respectively
Foot connection；The integrated circuit U3 is four LED charactrons.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811157135.3A CN108983244A (en) | 2018-09-30 | 2018-09-30 | A kind of Ultrasonic Range Finder for Parking auxiliary system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110930840A (en) * | 2019-12-19 | 2020-03-27 | 北京中诚博睿教育科技有限公司 | Electronic ultrasonic range finder teaching aid for children intelligence development |
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