CN208006888U - A kind of radar for backing car sound system of low cost - Google Patents
A kind of radar for backing car sound system of low cost Download PDFInfo
- Publication number
- CN208006888U CN208006888U CN201721240900.9U CN201721240900U CN208006888U CN 208006888 U CN208006888 U CN 208006888U CN 201721240900 U CN201721240900 U CN 201721240900U CN 208006888 U CN208006888 U CN 208006888U
- Authority
- CN
- China
- Prior art keywords
- radar
- backing car
- combination instrument
- signal
- cost
- 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.)
- Expired - Fee Related
Links
- 238000013461 design Methods 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims 1
- 238000011161 development Methods 0.000 abstract description 5
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 238000004891 communication Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 238000011160 research Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 206010019233 Headaches Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 231100000869 headache Toxicity 0.000 description 1
Landscapes
- Radar Systems Or Details Thereof (AREA)
Abstract
A kind of radar for backing car sound system of low cost of the utility model, system includes 2 electrical part component parts, they are combination instrument and radar for backing car respectively, the sound of radar for backing car is sent out by the buzzer of combination instrument, the system is in main engine plants' low cost vehicle project development process, greatly reduce the development cost of radar for backing car, both reverse radar monitoring system reduced a loud speaker, this is to a certain extent, reduce the cost of automobile research, in addition, relative to CAN signal, asynchronous communication or LIN signals, the signal that radar for backing car is sent out to combination instrument is the PWM wave hard signal of 5V sizes, this is also to a certain extent, reduce the cost of the hardware development of electric appliance radar for backing car and vehicle project development.
Description
Technical field
The present invention is novel to be related to technical field of automobile accessories, specifically a kind of radar for backing car sound system of low cost.
Background technology
As automobile sales volume is more and more, car accident is consequently increased.In order to ensure the safety of driver and passenger.
A kind of trailer-mounted radar of stability and high efficiency is essential.However, as domestic depot's competition in this several years is more and more fierce, valence is beaten greatly
Lattice are fought and the reduction of integral vehicle cost is that each domestic vehicle factor needs to consider the problems of this comparison headache in earnest.In vehicle
In cost, either vehicle body and interior trim, die cost occupy very one piece big.But reduce the cost phase of electrical part hardware design
To being easy, therefore a kind of radar for backing car sound system of low cost of design is relatively easy, and can either ensure oneself work
The stability of work, and the cost of vehicle can be reduced, which achieves the situations that fish and bear's paw get both.
The pwm signal of rigid line size 5V is sent to combination instrument, combination instrument by the reverse radar system of this low cost
After acquisition receives signal, after being filtered and then carry out judging to send out radar for backing car alarm sound.
Invention content
The utility model is a kind of radar for backing car alarm sound system of the combination instrument of low cost.Its mainly in hardware and
It is realized in software algorithm design.Asynchronous communication hardware module is not needed on hardware；The filtering to pwm signal is increased on software
Processing.
In order to achieve the above objectives, the technical solution adopted in the utility model is：A kind of radar for backing car sound system of low cost
System, including combination instrument receive the hardware circuit of radar for backing car square-wave signal, are characterized in that：Combination instrument is in hardware design
The square-wave signal that radar for backing car is sent out is filtered on circuit, which includes radar for backing car, microcontroller
And accumulator, continuous series has the resistance of 10k, 10k and 100k between radar for backing car and microcontroller, radar for backing car and first
By connecting accumulator after a 2k2 resistance between 10k resistance, the both ends of second 10k resistance are each in parallel electric there are one 103
Hold, the other end ground connection for 103 capacitances being connected with two 10k resistance.
Beneficial effects of the present invention and advantage are that the utility model is achieved that and allows radar for backing car alarm sound in combination instrument
The example of upper sounding.In turn, reverse radar system reduces by a loud speaker, and in addition combination instrument and reverse radar system hardware are set
Development cost is also reduced on meter.It has been finally reached the purpose for making main engine plants' automobile research reduce cost.
Description of the drawings
Fig. 1 is the utility model hardware circuit design schematic diagram.
Specific implementation mode
Such as Fig. 1, the utility model is related to a kind of radar for backing car sound systems of low cost, including combination instrument to receive reversing
The hardware circuit of radar square-wave signal, wherein：The square-wave signal that combination instrument sends out radar for backing car in hardware design circuit
It is filtered, which includes radar for backing car, microcontroller and accumulator, between radar for backing car and microcontroller
Continuous series has the resistance of 10k, 10k and 100k, by connecting after a 2k2 resistance between radar for backing car and first 10k resistance
Connect accumulator, the both ends of second 10k resistance are each in parallel there are one 103 capacitances, 103 capacitances being connected with two 10k resistance
The other end is grounded.
The process that radar for backing car is sent to combination instrument signal is：It is 50% that reverse radar monitoring system, which sends duty ratio,
PWM wave signal passes to the pwm signal that combination instrument receives duty ratio 50%, after combination instrument is filtered judgement, bee
Ring device sends out sound again.
Combination instrument receives hardware circuit design schematic diagram such as Fig. 1 of radar for backing car square-wave signal.
Combination instrument is filtered the square-wave signal that radar for backing car is sent out in hardware design circuit.It does so
The reason of be that there are many electric elements on vehicle.Therefore electromagnetic interference is very big.The square-wave signal that radar for backing car is sent out is passing through line
During beam is dealt into combination instrument, it is easy to disturbed.Therefore, during combination instrument hardware circuit design will to signal into
Row is filtered.
Combination instrument radar for backing car alarm sound working-flow is
1, judge astern signal
By showing that no astern signal, instrument begin to monitoring radar signal, period 100ms after the power is turned on.Do not moving backward
When signal, radar not transmission frequency.When point has astern signal at any time, then the first self-test of radar meeting sends out self-test letter
Corresponding frequencies are ceased, at this moment instrument finds there is frequency signal in monitoring cycle, then instrument thinks there is astern signal, and begins to respond to
Radar information.
2, radar information is responded
What radar was sent out is frequency signal, that is, in one second in send out how many high and low level, instrument can be write down
Radar sends out how many a high level and is used as according to radar information is judged altogether in 100 milliseconds, if radar sends 500Hz frequencies,
Instrument can write down 50 high level in 100 milliseconds, judge that radar sent out is the information of 500Hz frequencies in this.With this
Analogize other frequencies.
3, the jamproof algorithm of software filtering
Since frequency signal onboard has interference, software is needed to do filter function.Algorithm is as follows：One is calculated per 100ms
Frequency P2, compared with the frequency P1 of a upper 100ms
（1）P2 ratios P1 is big, and P2-P1 is small is equal to 2, then when secondary frequencies are considered P1+1；
（2）P2 ratios P1 is big, and P2-P1 is more than 2, then when secondary frequencies are considered P2；
（3）P2 ratios P1 is small, and P1-P2 is small is equal to 2, then when secondary frequencies are considered P1-1；
（4）P2 ratios P1 is small, and P1-P2 is more than 2, then when secondary frequencies are considered P2；
（5）P1 is equal to P2, then when secondary frequencies are considered P2.
Claims (1)
1. a kind of radar for backing car sound system of low cost, including combination instrument receive the hardware electricity of radar for backing car square-wave signal
Road, it is characterised in that：Combination instrument is filtered the square-wave signal that radar for backing car is sent out in hardware design circuit,
The hardware circuit includes radar for backing car, microcontroller and accumulator, between radar for backing car and microcontroller continuous series have 10k,
The resistance of 10k and 100k, by connecting accumulator after a 2k2 resistance between radar for backing car and first 10k resistance, second
The both ends of 10k resistance are each in parallel there are one 103 capacitances, and the other end for 103 capacitances being connected with two 10k resistance is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721240900.9U CN208006888U (en) | 2017-09-26 | 2017-09-26 | A kind of radar for backing car sound system of low cost |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721240900.9U CN208006888U (en) | 2017-09-26 | 2017-09-26 | A kind of radar for backing car sound system of low cost |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208006888U true CN208006888U (en) | 2018-10-26 |
Family
ID=63880239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721240900.9U Expired - Fee Related CN208006888U (en) | 2017-09-26 | 2017-09-26 | A kind of radar for backing car sound system of low cost |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208006888U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110879392A (en) * | 2019-11-29 | 2020-03-13 | 安徽江淮汽车集团股份有限公司 | Host-free radar ranging alarm method, device, circuit and storage medium |
-
2017
- 2017-09-26 CN CN201721240900.9U patent/CN208006888U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110879392A (en) * | 2019-11-29 | 2020-03-13 | 安徽江淮汽车集团股份有限公司 | Host-free radar ranging alarm method, device, circuit and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110091795A (en) | Multipurpose automobile audio device | |
| CN202669497U (en) | Vehicle-mounted heart monitoring safety driving device | |
| CN102602333A (en) | Multi-mode pedestrian safety sound warning system for electric vehicle | |
| CN208006888U (en) | A kind of radar for backing car sound system of low cost | |
| CN104956413A (en) | Acoustic signaling system for electric, hybrid vehicles or the like | |
| CN201553122U (en) | Pedestrian safety alarming system for all-electric vehicle and all-electric vehicle | |
| CN108944663A (en) | Pure electric automobile and plug-in hybrid-power automobile run at a low speed prompt mixer | |
| CN203864459U (en) | Automobile digital combination instrument assembly | |
| CN208188333U (en) | Automobile blind spot monitors system general-purpose chip system | |
| CN207631117U (en) | A kind of buzzer device based on unilateral diode and relay Mixed Design | |
| CN101982347A (en) | Automobile horn control circuit | |
| CN207711909U (en) | Vehicle intelligent caution sound equipment for electric vehicle | |
| CN207637248U (en) | A kind of multi-functional buzzer device based on unilateral diode design | |
| CN207704029U (en) | A kind of ultrasonic wave is parked anti-collision system | |
| CN205220605U (en) | GSM network car electronic monitoring system based on cell phone terminal | |
| CN205577644U (en) | Malfunctioning suggestion device of car remote control lock | |
| CN111993996B (en) | Warning circuit arranged on new energy automobile | |
| CN109263545A (en) | A kind of outer alarming method for power of the vehicle of electric car and device | |
| CN106314272A (en) | Automobile low-speed-driving alarm system and alarm method thereof | |
| CN203438933U (en) | Proximity sensing system of new energy automobile | |
| CN210604974U (en) | Ultrasonic wave blind area monitoring control circuit | |
| CN211710716U (en) | Commercial car turn alarm device | |
| CN202243173U (en) | Automobile front and rear horn device | |
| CN211858126U (en) | Anti-interference automobile-used klaxon of long service life | |
| CN203496815U (en) | Automobile door / window control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181026 |