CN207257513U - A kind of car door anti-collision prior-warning device - Google Patents
A kind of car door anti-collision prior-warning device Download PDFInfo
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- CN207257513U CN207257513U CN201721272799.5U CN201721272799U CN207257513U CN 207257513 U CN207257513 U CN 207257513U CN 201721272799 U CN201721272799 U CN 201721272799U CN 207257513 U CN207257513 U CN 207257513U
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- information acquisition
- acquisition module
- car door
- car
- warning device
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Abstract
The utility model belongs to field of automobile safety, discloses a kind of car door anti-collision prior-warning device.In automobile stop, utilize the mobile object at continuous wave radar detection rear, screen out stationary object and the filtering signal away from stopped vehicle, echo-signal of the processing close to stopped vehicle, calculate the relative distance of mobile object and stopped vehicle, relative velocity and relative acceleration, using the safe distance between DSP microprocessors contrast stopped vehicle and suspicious danger and safety time and judge its security, when security is less than to a certain degree, danger that may be present when driver and passenger's enabling are reminded in warning system in time, car door is carried out during emergency to latch.The utility model is solved after parking of automobile since personnel's opening car door does not have early warning, is easily collided with extraneous mobile vehicle and is caused the prior art problem of security incident.
Description
Technical field
It the utility model is related to field of automobile safety, more particularly to a kind of car door anti-collision prior-warning device.
Background technology
Automobile is one of main delivery vehicle of transportation modernization, and the quickening of intelligent transportation has promoted the leather of communications and transportation
Order sexual development.Intelligent transportation can maximize lifting Automobile Transportation efficiency and security, the intelligent level of automobile are constantly lifted
It is one of key factor, while it is also essential factor to strengthen automobile and the intercommunication of external environment information.Handed over according to the Ministry of Public Security
Pipe office counts, and national vehicle guaranteeding organic quantities in 2017 and motor vehicle driving personnel will maintain sustained and rapid growth.With motor vehicle number
The rise of amount and frequency of use, existing security risk also increase, the annual traffic accident more than 500,000 of China, because of traffic accident
Death toll exceed 100,000 people, stand to lose every year caused by traffic accident more than reaching tens billion of members.Counted according to traffic police office, because
Disastrous accident is up to 30% caused by undesirable driving habit, for example some drivers and passenger do not have good habit by bus
Used, when automobile parking, is forgotten to detect whether rear has vehicles or pedestrians close, causes car door in the moment of opening with drawing close rapidly
The vehicle of car door is collided and scratched, especially motorcycle and electric bicycle, fall down after often being bumped against by car door by
Other pass through automobile impactings and roll, bring serious secondary injury to victim, cause heaviness traffic accident.
Existing safe enabling early warning anti-collision system is limited due to the limitation of high-tech, high cost on using outfit
Many restrictions processed.Therefore, it is a kind of it is new, technically simple, cost is relatively low, the enabling that can be widely used on most of automobiles
Pre-warning anti-collision device is particularly significant and very required.
Utility model content
The utility model aim is to provide a kind of car door anti-collision prior-warning device, to solve after parking of automobile since personnel open
Opening car door does not have early warning, easily collides with extraneous mobile vehicle and causes the prior art problem of security incident.
A kind of car door anti-collision prior-warning device provided by the utility model, including DSP microprocessors, information acquisition module and place
Module is put, information acquisition module includes car external information acquisition module and enabling information acquisition module, car external information acquisition module peace
On automobile left side rearview mirror, enabling information acquisition module is installed on the interior knob at automobile left side front door and left side back door
Place, and DSP microprocessors are connected with car external information acquisition module, enabling information acquisition module and disposal module respectively.
Further, car external information acquisition module is radar sensor.
Further, enabling information acquisition module is compression sensor.
Further, disposal module includes alarm and locking system, and locking system is connected to control with DSP microprocessors
Vehicle door control system processed, and alarm is also connected with DSP microprocessors.
Further, prior-warning device further includes message processing module, and message processing module includes wave filter, high-frequency amplifier
And A/D converter, wave filter are connected with radar sensor and DSP microprocessors respectively, locking system is connected with high-frequency amplifier,
A/D converter is connected with high-frequency amplifier and DSP microprocessors respectively.
The utility model has the advantages that：
1st, the present apparatus, using detections of radar rear view of vehicle or side convergence personage's speed, judges safety in automobile stop
Property, danger that may be present when reminding driver and passenger's enabling in time latches there are progress car door during potential danger, avoids
Opening car door causes the security risk of collision with extraneous mobile vehicle.
2nd, the present apparatus can individually connect automobile circuit without influencing primary circuit, easy for installation, using simple.
3rd, the present apparatus uses the continuous continuous wave radar of linear frequency modulation, its working frequency 24GHz, system structure is simple, transmitting
Frequency spectrum is relatively narrow and cost is low.For finding range in 1~100m, ranging accuracy can utilize system condition, sexual valence well in 1m
Than high.
Below with reference to accompanying drawings, the utility model is described in further detail.
Brief description of the drawings
The attached drawing for forming the part of the application is used to provide a further understanding of the present invention, the utility model
Schematic description and description is used to explain the utility model, does not form the improper restriction to the utility model.In attached drawing
In：
Fig. 1 is a kind of car door anti-collision prior-warning device structure chart of the preferred embodiment in the utility model；
Fig. 2 is a kind of car door anti-collision prior-warning device work flow diagram of the preferred embodiment in the utility model；
Fig. 3 is a kind of radar sensor workflow of car door anti-collision prior-warning device of the preferred embodiment in the utility model
Figure；
Fig. 4 is a kind of circuit structure diagram of the alarm of car door anti-collision prior-warning device of the preferred embodiment in the utility model.
Embodiment
The embodiment of the utility model is described in detail below in conjunction with attached drawing, but the utility model can be by right
It is required that the multitude of different ways for limiting and covering is implemented.
The utility model discloses a kind of car door anti-collision prior-warning device first, referring to Fig. 1, including DSP microprocessors, information
Acquisition module and disposal module, information acquisition module include car external information acquisition module and enabling information acquisition module, believe outside car
Cease acquisition module to be installed on automobile left side rearview mirror, after enabling information acquisition module is installed on automobile left side front door and left side
At the interior knob of door, DSP microprocessors connect with car external information acquisition module, enabling information acquisition module and disposal module respectively
Connect.
Referring to Fig. 2, Fig. 2 is present apparatus work flow diagram.Car external information acquisition module is installed on automobile left side rearview mirror,
After vehicle lay-off, the signal of vehicle velocity V=0 is passed to DSP microprocessors by automobile ECU via interface data processor, and DSP is micro-
After processor receives the signal of V=0, instruction is sent to car external information acquisition module, the outer acquisition module of car start to work and incite somebody to action
The data feedback of collection gives DSP microprocessors.DSP microprocessors receive the motive objects calculated after feedback signal close to this car
The speed of body, distance and close to the time needed for this car.Under normal circumstances, after this car stagnation of movement, same track other
Car driver notices the situation that this car car door has been opened, and ordinary circumstance can evade danger existing for front, take deceleration or lane change
Deng measure.By statistical number it is reported that other vehicle drivers perceive, identify, judge and react this car opens the door suddenly this danger signal
Time be about 0.4 second, other vehicle drivers take the time of corresponding measure to vary with each individual, but generally in 2 seconds, this implementation
It will be arranged in the reaction time 1.5 seconds in example, this setting can be changed voluntarily according to demand.Other vehicle drivers are in this process
In total reaction time t≤0.4+1.5=1.9 second, to improve its security, set safety coefficient as 1.2, then mobile vehicle is remote
The safety time of stopped vehicle is t=1.9 × 1.2=2.28 seconds, the time thresholding that t referred to as opens the door safely.As predicted time ti
When the time that >=t, i.e. other vehicles sail out of this car is more than the thresholding opened the door safely, DSP microprocessors control disposal module is sent
The prompting of " can be with opening car door ", wherein, t is the time thresholding opened the door safely, tiFor the variable quantity real-time monitored.Work as prediction
Time t1When the time that≤t, i.e. other vehicles sail out of this car is less than the thresholding opened the door safely, DSP microprocessors believe this danger
Breath passes to disposal module, and disposal module control vehicle door control system latches and sends alarm, sends that " rear has object to lean on
Prompting closely ".Show that danger has released after other vehicles are by the hazardous area of this car, disposal module sends and " can open
The prompting of car door ", DSP microprocessors send instruction to control early warning mould, complete vehicle door control system unlock.Work as driver
Or passenger pulls left side door handle on the left of automobile rear, installed in door handle, that enabling information acquisition module reception should
Information, and pass it to DSP microprocessors and handled, only when enabling information acquisition module sends the same of signal
When, when disposal module is not located at " rear have object close " period, vehicle door control system could be completed to unlock.Once open
When door information acquisition module disposes module when sending signal and is in " rear have object close " period, even if enabling information gathering
Module sends enabling signal, that is, has personnel to pull in-car handle to prepare to open the door, and vehicle door control system will not unlock, so that
Prevented occupant do not notice back car blindly open the door and caused by security risk.
Preferably, car external information acquisition module is radar sensor.Referring to table 1, table 1 is speed-measuring method comparison diagram, by scheming
Understand, the detection performance of radar range finding is stablized relatively, is influenced from the surface configuration of testee and color etc., for environment
It is adaptable；The ripple of radar emission has longer penetration capacity, its range accuracy is subject to the gas of mist, rain, snow and sunlight etc.
Time factor and the influence of the environmental factor of noise, pollution etc. are smaller, it is ensured that automobile can under any weather condition
Normally work.In conclusion radar range finding mode can be embodied than other modes in some respects excellent through comparing
More property becomes apparent, and can more be adapted in the demand of this respect of vehicle safety enabling anti-collision early warning system.On the other hand, transport
With the radar range finding mode of continuous wave while target range is measured, can also measure the various of target object has very much
The parameter of value, such as traveling time, relative displacement, azimuth etc., so as to ensure that automobile can be in harsh climate bar
Reach the test of blind row each side in part.In addition, in the case where measuring condition is identical, had using radar it is simple in structure, point
The advantages of resolution is higher, and antenna element size is small, it also has, and time of measuring is short, range it is big (can reach 10km with
On), the advantages that precision is high.Therefore, the car external information acquisition module of the present embodiment has selected radar sensor.
1 speed-measuring method comparison diagram of table
Establish the essential technical specification that do definite radar sensor of car door anti-collision prior-warning device.From both at home and abroad it is more
For the conventional success in year and experience, continuous-wave radar system has to reach following technical requirements：
The system must be able to detect all static and moving object in radar scanning region, and maximum operating range is 50
For rice to 200 meters or so, distance resolution is not more than 1 meter；System will have the function of to test orientation.This has exclusive PCR target
It is significant.On the basis of system performance is determined, complete machine small size, low cost, the mesh of low false alarm rate are realized as far as possible
Mark.
Therefore, the technical indicator of the radar designed herein is:1st, working environment:All weather operations；2nd, temperature range is:-
40 DEG C~+80 DEG C；3rd, distance resolution:lm；4th, operating distance R:Generally l~l00m；5th, measured speed scope v:0~40m/
s；6th, radar visual angle:In order to reduce the ratio of false-alarm, 9 °~l2 ° of azimuth, 3 ° of the angle of site are usually chosen.To sum up,
For the design using the continuous wave radar sensor of the K-MC3 models of 24GHz, Fig. 3 is car radar structure principle chart.
Preferably, enabling information acquisition module is compression sensor.Present automobile is required for pressing in opening car door
Button on inside door handle could be by opening car door, therefore this is the required step of opening car door, installs and presses on this button
Pressure sensor is the door opening action that would know that occupant.
Preferably, disposal module includes alarm and locking system, and locking system is connected to control with DSP microprocessors
Vehicle door control system, and alarm is also connected with DSP microprocessors.
Locking system is used to control vehicle door control system, during in " rear have object close " period, locking dress
Put control vehicle door control system and lock car door lock, even if occupant carries out opening door operation manually, car door can not also be opened,
Only when locking system control vehicle door control system opening car door is locked, while occupant carries out opening door operation manually,
Could opening car door.Alarm sends different early warning contents according to different periods, and such as " can be with opening car door " and " there be thing at rear
Body is close " etc., when can be with the action of inspection opening car door by sound prompting occupant.Referring to Fig. 4, Fig. 4 is this implementation
The alarm circuit structure chart of example.
Preferably, prior-warning device further includes message processing module, message processing module include wave filter, high-frequency amplifier and
A/D converter, wave filter are connected with radar sensor and DSP microprocessors respectively, and locking system is connected with high-frequency amplifier, A/
D converters are connected with high-frequency amplifier and DSP microprocessors respectively.
Continuous wave radar sensor according to the present embodiment using the K-MC3 models of 24GHz, using model LTC1064
Wave filter.What the present embodiment lock was selected is TMS320VC5410 model DSP microprocessors, and the radar described in the present embodiment passes
Sensor works using DSP microprocessors as core, its most important signal processing algorithm is all in DSP microprocessors
Carry out.System initializes first, sets related register and storage unit, allows system to keep normal operating conditions, then gather
Data, carry out A/D conversions, sampled data destination address pointer are initialized as 2000H here, Sampling interrupt service subprogram is every
As soon as reading a sampled value, which adds 1 automatically, is directed toward next sampled data storage unit.Counter begins to turn to
400H, interrupt service subroutine often perform once, and the value of counter just subtracts 1, when the value of counter reduces to 0, interrupt service example
Journey performs 1024 times, obtains 8000 sampled values, is stored in data space 2000H-3FFFH, hereafter A/D converter
The sampled clock signal of THS1206 is closed, and stopped work.Following main program starts to carry out adaptive-filtering to sampled data
Calculated with FFT, and therefrom find the frequency corresponding to maximum the intensity of spectral line, it is considered as IF frequency, thing is thus calculated
Body spacing distance and speed；And the time that object reaches stopped vehicle is calculated, time value is judged whether in safe thresholding, if
Less than safe thresholding, then alarm is sent.Using the timing function of DSP on-chip timers, program can be made just to be carried out every 50ms
Once perform from data sampling to the circulation shown apart from speed, obtained so as to fulfill distance and the real-time of speed.DSP technology energy
Enough utilize software modification processing parameter, possess larger flexibility and stability, it is possible to achieve the computing of complex, it is existing oneself into
For the mainstream of Radar Signal Processing Technology.After radar sensor receives echo-signal, these signals are successively filtered, amplify, A/D
It is sent to DSP microprocessors after conversion to be analyzed and processed, DSP microprocessors calculate the mobile object close to stopped vehicle
Speed, distance and the time close to stopped vehicle, judge that early warning system provides data reference for information.According to the micro- places of DPS
The adaptation of device is managed, selects the high-frequency amplifier of model LM318 and the A/D converter of model AD7862.
Embodiment 1：
B motors length of wagon is 1.8m, and the distance of B car distance A cars is 50m, and B motorcycles drive towards the A of stagnation of movement with 45km/h
Car.Radar sensor rearward launches higher-frequency radar ripple on A cars, and radar wave is launched after running into B cars, the thunder launched and reflected
Arrived wave signal is delivered in DSP, and the program in DSP brings into operation, first by both transmitted wave and back wave frequency same
Moment rises or falls the difference in stage, judges B objects for mobile object；Program continues to run with, and is then believed by two-way
Number context, judge that B objects close to A cars, are obtained B cars and sailed close to the speed of A cars, distance and B cars with this speed
From the time needed for A cars, B cars sail out of the time needed for A cars with this speed:
t1≥t0The time that=2.28s, i.e. B cars sail out of A cars is more than the thresholding opened the door safely, DSP control voice alarm units
Send the prompting of " can be with opening car door ".
Embodiment 2：
B cars length of wagon is 1.5m, and the distance of B car distance A cars is 20m, and B cars drive towards the A cars of stagnation of movement with 50km/h.A cars
Upper radar sensor rearward launches higher-frequency radar ripple, and radar wave is launched after running into B cars, the radar wave letter launched and reflected
Number it is delivered in DSP, the program in DSP brings into operation, first by both transmitted wave and back wave frequency on synchronization
Liter or the difference of decline stage, judge B objects for mobile object；Program continues to run with, then by two paths of signals before
Relation afterwards, judges that B objects close to A cars, obtain B cars and sail out of A cars institute close to the speed of A cars, distance and B cars with this speed
The time needed, B cars sail out of the time needed for A cars with this speed:
t2≤t0, the time that B cars sail out of A cars is less than the thresholding opened the door safely, and DSP is by this dangerous information via interface data
Processor is delivered separately to automobile door lock control unit and audio alert control unit, and car door latches, and warning system is alarmed at once,
Send the prompting of " rear has that object is close, after 2.28 seconds can opening car door "；After danger signal releases, driver or automobile
Passenger pulls left side door handle on the left of heel row, and the pressure sensor in door handle receives the information, and by signal
Be transmitted to DSP processing, DSP receive and pressure sensor signal after, send instruction to mechanism for controlling automobile door lock, realize unlock,
Driver and passenger, which can open the door safely, to get off.
Behind hazardous area of the B cars by A cars, at this moment, show that danger has released, warning system is sent " can be with safety open
Open car door " prompting.
Embodiment 3：
B cars length of wagon is 4.5m, and the distance of B car distance A cars is 50m, and speed 60km/h, B car is sailed with this vehicle speed
It is from the time needed for A cars：
t3≥t0The time that=2.28s, i.e. B cars sail out of A cars is more than the thresholding opened the door safely, DSP control voice alarm units
Send the prompting of " can be with opening car door ".
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the present invention, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on, should be included within the scope of protection of this utility model.
Claims (5)
- A kind of 1. car door anti-collision prior-warning device, it is characterised in that including DSP microprocessors, information acquisition module and module is disposed, Described information acquisition module includes car external information acquisition module and enabling information acquisition module, the car external information acquisition module peace On automobile left side rearview mirror, the enabling information acquisition module is installed on the interior drawing at automobile left side front door and left side back door At hand, and the DSP microprocessors respectively with the car external information acquisition module, the enabling information acquisition module and the place Put module connection.
- A kind of 2. car door anti-collision prior-warning device according to claim 1, it is characterised in that the car external information acquisition module For radar sensor.
- A kind of 3. car door anti-collision prior-warning device according to claim 1, it is characterised in that the enabling information acquisition module For compression sensor.
- 4. a kind of car door anti-collision prior-warning device according to claim 2, it is characterised in that the disposal module includes alarm Device and locking system, the locking system are connected to control vehicle door control system with the DSP microprocessors, and described Alarm is also connected with the DSP microprocessors.
- 5. a kind of car door anti-collision prior-warning device according to claim 4, it is characterised in that the prior-warning device further includes letter Cease processing module, described information processing module includes wave filter, high-frequency amplifier and A/D converter, the wave filter respectively with The radar sensor is connected with the DSP microprocessors, and the locking system is connected with the high-frequency amplifier, the A/D Converter is connected with the high-frequency amplifier and the DSP microprocessors respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721272799.5U CN207257513U (en) | 2017-09-29 | 2017-09-29 | A kind of car door anti-collision prior-warning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721272799.5U CN207257513U (en) | 2017-09-29 | 2017-09-29 | A kind of car door anti-collision prior-warning device |
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| CN207257513U true CN207257513U (en) | 2018-04-20 |
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ID=61919980
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| CN201721272799.5U Expired - Fee Related CN207257513U (en) | 2017-09-29 | 2017-09-29 | A kind of car door anti-collision prior-warning device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107672521A (en) * | 2017-09-29 | 2018-02-09 | 湖南农业大学 | A kind of car door anti-collision prior-warning device |
| CN108798305A (en) * | 2018-06-18 | 2018-11-13 | 宁波市鄞州智伴信息科技有限公司 | Vehicle safety method for early warning based on radar |
| CN108909621A (en) * | 2018-07-12 | 2018-11-30 | 芜湖博高光电科技股份有限公司 | A kind of millimeter wave detection car door anticollision safety system and its guard method outside |
-
2017
- 2017-09-29 CN CN201721272799.5U patent/CN207257513U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107672521A (en) * | 2017-09-29 | 2018-02-09 | 湖南农业大学 | A kind of car door anti-collision prior-warning device |
| CN108798305A (en) * | 2018-06-18 | 2018-11-13 | 宁波市鄞州智伴信息科技有限公司 | Vehicle safety method for early warning based on radar |
| CN108909621A (en) * | 2018-07-12 | 2018-11-30 | 芜湖博高光电科技股份有限公司 | A kind of millimeter wave detection car door anticollision safety system and its guard method outside |
| CN108909621B (en) * | 2018-07-12 | 2020-10-16 | 芜湖博高光电科技股份有限公司 | Protection method of millimeter wave detection vehicle door outer anti-collision safety system |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |