CN104742844A - Safety door opening early warning device used after automobile is parked - Google Patents
Safety door opening early warning device used after automobile is parked Download PDFInfo
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- CN104742844A CN104742844A CN201510154851.6A CN201510154851A CN104742844A CN 104742844 A CN104742844 A CN 104742844A CN 201510154851 A CN201510154851 A CN 201510154851A CN 104742844 A CN104742844 A CN 104742844A
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- automobile
- radar sensor
- car
- door
- warning
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q9/00—Arrangement or adaptation of signal devices not provided for in one of main groups B60Q1/00 - B60Q7/00, e.g. haptic signalling
- B60Q9/008—Arrangement or adaptation of signal devices not provided for in one of main groups B60Q1/00 - B60Q7/00, e.g. haptic signalling for anti-collision purposes
-
- 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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/50—Systems of measurement based on relative movement of target
- G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
- G01S13/583—Velocity or trajectory determination systems; Sense-of-movement determination systems using transmission of continuous unmodulated waves, amplitude-, frequency-, or phase-modulated waves and based upon the Doppler effect resulting from movement of targets
- G01S13/584—Velocity or trajectory determination systems; Sense-of-movement determination systems using transmission of continuous unmodulated waves, amplitude-, frequency-, or phase-modulated waves and based upon the Doppler effect resulting from movement of targets adapted for simultaneous range and velocity measurements
-
- 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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
- G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
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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)
- Electromagnetism (AREA)
- Human Computer Interaction (AREA)
- Mechanical Engineering (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention provides a safety door opening early warning device used after an automobile is parked, and belongs to the technical field of automobile safety. The safety door opening early warning device used after the automobile is parked comprises an automobile door lock system, a radar sensor, a pressure sensor, an information processing module, a digital signal processing system, an alarm system and an interface data processor. The information processing module comprises a filter, a high-frequency amplifier and an A/D converter. After the automobile stops, an automobile electronic control unit transmits the signal that the speed V is equal to 0 to the digital signal processing (DSP) system through the interface data processor, then a command is sent to the radar sensor, the radar sensor starts to emit 24 GHZ high-frequency short waves outwards, wave return signals are received through a receiving antenna, the wave return signals are analyzed and processed through the DSP after smoothing, amplifying and A/D converting are conducted, and then the monitored situation is fed back to a driver timely, so that the driver can open the car door safely. The safety door opening early warning device is simple in hardware structure, and the radar sensor is stable in work, lower in cost and convenient to popularize.
Description
Technical field
The invention belongs to technical field of vehicle safety, after being specifically related to a kind of automobile parking, the extraneous mobile object near stagnation of movement automobile of active monitoring, reminds the prior-warning device that chaufeur and passenger safety open the door.
Background technology
At present, the technology of field of automobile safety comparative maturity comprises anti-lock (ABS), lane change auxiliary (LCA), deceleration of electrons distribution (EBD), electronic stabilization device (ESP), Reverse Sensor etc., these are all about automobile active safety technologies in the process of moving, but, after automobile parking, chaufeur or passenger are not noting environment surrounding automobile, when particularly not noting car door surrounding environment, may collide or scratch by object near the moment of opening the door and approaching car door, causing safety misadventure.
Summary of the invention
After automobile parking, chaufeur ignores parking environment, opening car door and extraneous moving vehicle collide the potential safety hazard caused, improve the active safety of automobile, the invention provides the safe door-opening prewarning device of a kind of automobile parking, can accurate measurements to the mobile object of motor vehicle environment, remind the danger that chaufeur and passenger may exist in time.
The technical solution adopted for the present invention to solve the technical problems is as follows:
Safe door-opening prewarning device after a kind of automobile parking, comprise automobile door lock system 1, radar sensor 3, pressure sensor 5, message processing module, digital information processing system 8, warning 9 and interface data treater 10, wherein, message processing module comprises filter 4, radioamplifier 6 and A/D converter 7, it is characterized in that, radar sensor 3 is arranged on automobile left side back mirror, and be connected with filter 4, before pressure sensor 5 is arranged on automobile left side, the interior handle place of tail gate, and be connected with radioamplifier 6, radioamplifier 6 is connected with the input end of A/D converter 7, the input end of digital information processing system 8 connects vehicle electronic control unit 2 and A/D converter 7 respectively, mouth connects phonetic warning system 9 and automobile door lock system 1 respectively.
Wherein, automobile door lock system 1 adopts two ore control, when the safety signal of radar sensor and the signal of pressure sensor occur simultaneously, completes unblock.
Further, radar sensor 3 adopts binary channel Continuous Wave with frequency modulation pattern (FMCM), digital information processing system (DSP) transmitting and the context in Received signal strength two paths of signals phase place by radar sensor, determine the direction of mobile object, filtering, away from the signal of stopped vehicle, carries out subsequent treatment to the signal near stopped vehicle.If two paths of signals overlaps, object rest is described, filtering undesired signal, retains the signal near stopped vehicle.
Further, warning 9 adopts voice or buzzing warning.
The principle of work of this prior-warning device: when after A car stagnation of movement, the signal of vehicle velocity V=0 is passed to DSP via interface data treater by vehicle electronic control unit (ECU), DSP receives the signal of V=0, instruction is sent to radar sensor, radar sensor is started working, radar sensor constantly outwards launches the high-frequency short waves of 24GHZ, receives echoed signal by receiving wire, and these signals are sent to DSP first and carry out analyzing and processing after filtering, amplification, A/D conversion.DSP calculates the time near the speed of mobile object of A car, distance and close A car.
The situation that A car car door has been opened is noticed at the B car chaufeur in same track, general run of thins B car chaufeur can evade the danger that front exists, it is reported that suddenly open the door time of this danger signal of the perception of B car chaufeur, identification, judgement and reaction A car is about 0.4s by statistics, B car chaufeur takes the time of the measures such as deceleration, lane change to vary with each individual, but it is general between 0.3 ~ 4s, the reaction time that then moving vehicle is total is in this process 0.7 ~ 4.4s, and moving vehicle total in this process reaction time is T
0=0.4+4=4.4s, for improving its safety, setting safety factor is 1.5, then moving vehicle is t away from the safety time of stopped vehicle
0=4.41.5=6.6s, t
0be called the time thresholding that safety is opened the door.
As predicted time ti>t
0, when the time that namely B car sails out of A car is greater than the thresholding that safety opens the door, DSP controls the prompting that audio alert unit sends " can opening car door ", wherein, and t
0for the time thresholding that safety is opened the door, ti is the variable quantity real-time monitored.
As predicted time ti<t
0namely the time that B car sails out of A car, when being less than the thresholding that safety opens the door, this dangerous information was passed to automobile door lock control unit and audio alert control unit via interface data treater by DSP respectively, and car door latches, warning is reported to the police at once, sends the prompting at " rear have object close "; After B car is by the dangerous area of A car, show that danger is removed, the prompting that warning sends " can safe opening car door ", at this moment on the left of chaufeur or automobile rear, passenger pulls left side Door Handle, and the pressure sensor be arranged in Door Handle receives this information, and signal is passed to DSP process, after DSP receives pressure sensor signal, send instruction to mechanism for controlling automobile door lock, realize unlocking, chaufeur and passenger can open the door safely and get off.
The invention has the beneficial effects as follows, chaufeur is after parking, and the situation of monitoring can be fed back to chaufeur by system in time, so that driver safety opens car door.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is safe door-opening prewarning device operating diagram after automobile parking.
In Fig. 1: the region M of stopped vehicle A, the automobile B, the length L that drive towards A, radar wave scanning, the position O of radar sensor installation, the distance S of monitoring.
Fig. 2 is safe door-opening prewarning device principle schematic after automobile parking.
In Fig. 2: automobile door lock system 1, vehicle electronic control unit 2, radar sensor 3, filter 4, pressure sensor 5, radioamplifier 6, A/D converter 7, digital information processing system 8, warning 9, interface data treater 10.
Fig. 3 is that triangular modulation fmcw radar monitoring stationary object transmits and Received signal strength frequency time graph of a relation.
Fig. 4 is that triangular modulation fmcw radar monitoring mobile object transmits and Received signal strength frequency time graph of a relation.
Fig. 5 is the diagram of circuit of DSP signal processing module.
Detailed description of the invention
Be further described method of the present invention below by specific embodiment, the specific descriptions of described embodiment just to claim of the present invention, claim includes but not limited to described embodiment content.
The present invention adopts model is the filter of LTC1064, model is LM318 radioamplifier and model to be the A/D converter of AD7862.
Embodiment 1
Safe door-opening prewarning device after a kind of automobile parking, comprise automobile door lock system 1, radar sensor 3, pressure sensor 5, message processing module, digital information processing system 8, warning 9 and interface data treater 10, wherein, message processing module comprises filter 4, radioamplifier 6 and A/D converter 7, it is characterized in that, radar sensor 3 is arranged on automobile left side back mirror, and be connected with filter 4, before pressure sensor 5 is arranged on automobile left side, the interior handle place of tail gate, and be connected with radioamplifier 6, radioamplifier 6 is connected with the input end of A/D converter 7, the input end of digital information processing system 8 connects vehicle electronic control unit 2 and A/D converter 7 respectively, mouth connects phonetic warning system 9 and automobile door lock system 1 respectively.
Wherein, warning 9 adopts phonetic warning system.
Further, automobile door lock system 1 adopts two ore control, when the safety signal of radar sensor and the signal of pressure sensor occur simultaneously, completes unblock.
The principle of work of this prior-warning device: when after A car stagnation of movement, the signal of vehicle velocity V=0 is passed to DSP via interface data treater by automobile ECU, and DSP receives the signal of V=0, sends instruction to radar sensor, and radar sensor is started working.Radar sensor constantly outwards launches the high-frequency short waves of 24GHZ, echoed signal is received by receiving wire, these signals are successively by filtering, amplification, A/D conversion and DSP process, and DSP calculates the time of the speed of the mobile object near A car, distance and close A car.
The situation that A car car door has been opened is noticed at the B car chaufeur in same track, general run of thins B car chaufeur can evade the danger that front exists, it is reported that suddenly open the door time of this danger signal of the perception of B car chaufeur, identification, judgement and reaction A car is about 0.4s by statistics, B car chaufeur takes the time of the measures such as deceleration, lane change to vary with each individual, but it is general between 0.3 ~ 4s, the reaction time that then moving vehicle is total is in this process 0.7 ~ 4.4s, and moving vehicle total in this process reaction time is T
0=0.4+4=4.4s, for improving its safety, setting safety factor is 1.5, then moving vehicle is t away from the maximum safety time of stopped vehicle
0=4.41.5=6.6s, t
0be called the time thresholding that safety is opened the door.
Specific works process is as follows:
The monitoring of stationary object: is as shown in Figure 3 that fmcw radar monitoring stationary object transmits and the time chart of Received signal strength.F
tradar transmitting wave frequency, F
rradar return frequency, f
dthe frequency-splitting of synchronization emitted wave and backward wave, T is the sawtooth recurrence interval.By the two frequency in synchronization rising or the difference of decline stage, the distance of stationary object to radar sensor can be monitored.For static object, system only identifies, this signal is undesired signal, does not have subsequent treatment.
The judgement in mobile object direction: the binary channel Continuous Wave with frequency modulation pattern adopting radar sensor, by the context of two paths of signals, judges the direction of mobile object, filtering, away from the signal of stopped vehicle, carries out subsequent treatment to the signal near stopped vehicle.
The monitoring of mobile object: as shown in Figure 4, that fmcw radar monitoring mobile object transmits and the frequency time graph of a relation of Received signal strength, f+ is modulation signal ascent stage Received signal strength difference frequency, f-is modulation signal decline stage Received signal strength difference frequency, Δ f is the frequency displacement that Doppler effect causes, set up trigonometric function equation, calculate the distance S of mobile object, speed V and pass through in the time ti sailing vehicle.
The speed computing formula of mobile object is:
The distance computing formula of mobile object is:
Mobile object by the Time Calculation formula of parking is:
Wherein, C is the light velocity, and f0 is the transmitting frequency of radar.
B car bodywork length is the distance of 4.5m, B spacing A car is that 170m, B car drives towards the A car of stagnation of movement with 80km/h.
The time that B car sails out of needed for A car with this speed of a motor vehicle is:
T
1>t
0, the time that namely B car sails out of A car is greater than the thresholding that safety is opened the door, and DSP controls the prompting that audio alert unit sends " can opening car door ".
Embodiment 2
B car bodywork length is the distance of 4.5m, B spacing A car is that 150m, B car drives towards the A car of stagnation of movement with 100km/h.
On A car, radar sensor rearward launches higher-frequency radar ripple, radar wave is launched after running into B car, the radar wave signal launched and reflect is delivered in DSP, program in DSP brings into operation, first risen or the difference of decline stage at synchronization by both emitted wave and backward wave frequency, judge that B object is the object of movement; Program continues to run, and then by the context of two paths of signals, judges that B object is near A car, and obtain B car and sail out of the time needed for A car near the speed of A car, distance and B car with this speed of a motor vehicle, B car sails out of the time needed for A car with this speed of a motor vehicle:
T
2<t
0the time that B car sails out of A car is less than the thresholding of opening the door safely, this dangerous information is passed to automobile door lock control unit and audio alert control unit via interface data treater by DSP respectively, car door latches, warning is reported to the police at once, send the prompting of " rear has object close, after 5.562 seconds can opening car door "; After danger signal is removed, on the left of chaufeur or automobile rear, passenger pulls left side Door Handle, the pressure sensor be arranged in Door Handle receives this information, and signal is passed to DSP process, DSP receives and after pressure sensor signal, send instruction to mechanism for controlling automobile door lock, realize unlocking, chaufeur and passenger can open the door safely and get off.
Embodiment 3
B car bodywork length is the distance of 4.8m, B spacing A car is 50m, and to be the time that 60km/h, B car sails out of needed for A car with this vehicle speed be speed
T
3<t
0the time that B car sails out of A car is less than the thresholding of opening the door safely, this dangerous information is passed to automobile door lock control unit and audio alert control unit via interface data treater by DSP respectively, car door latches, warning is reported to the police at once, send the prompting of " rear has object close, after 3.288 seconds can opening car door ".
When B car is by behind the dangerous area of A car, at this moment, show that danger is removed, the prompting that warning sends " can safe opening car door ".
Claims (4)
1. safe door-opening prewarning device after an automobile parking, comprise automobile door lock system (1), radar sensor (3), pressure sensor (5), message processing module, digital information processing system (8), warning (9) and interface data treater (10), wherein, message processing module comprises filter (4), radioamplifier (6) and A/D converter (7), it is characterized in that, radar sensor (3) is arranged on automobile left side back mirror, radar sensor (3) is connected with filter (4), before pressure sensor (5) is arranged on automobile left side, the interior handle place of tail gate, pressure sensor (5) is connected with radioamplifier (6), radioamplifier (6) is connected with the input end of A/D converter (7), the input end of digital information processing system (8) connects vehicle electronic control unit (2) and A/D converter (7) respectively, mouth connects phonetic warning system (9) and automobile door lock system (1) respectively.
2. safe door-opening prewarning device after automobile parking as claimed in claim 1, it is characterized in that, described automobile door lock system (1) adopts two ore control, when the safety signal of radar sensor and the signal of pressure sensor occur simultaneously, completes unblock.
3. safe door-opening prewarning device after automobile parking as claimed in claim 1, is characterized in that, described radar sensor (3) adopts binary channel Continuous Wave with frequency modulation pattern.
4. safe door-opening prewarning device after automobile parking as claimed in claim 1, it is characterized in that, warning (9) adopts voice or buzzing warning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510154851.6A CN104742844A (en) | 2015-04-02 | 2015-04-02 | Safety door opening early warning device used after automobile is parked |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510154851.6A CN104742844A (en) | 2015-04-02 | 2015-04-02 | Safety door opening early warning device used after automobile is parked |
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| CN104742844A true CN104742844A (en) | 2015-07-01 |
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| CN201510154851.6A Pending CN104742844A (en) | 2015-04-02 | 2015-04-02 | Safety door opening early warning device used after automobile is parked |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105329167A (en) * | 2015-12-11 | 2016-02-17 | 安徽工程大学 | Vehicle door opening early warning system and safety protection method thereof |
| CN105781275A (en) * | 2016-03-28 | 2016-07-20 | 安徽工程大学 | Vehicle safety door opening protection system and control method thereof |
| CN105882519A (en) * | 2016-04-11 | 2016-08-24 | 武汉理工大学 | Anti-collision device and control method for door opening after vehicle parking |
| CN106347210A (en) * | 2016-08-31 | 2017-01-25 | 东风汽车公司 | Automobile door-open early-warning system and method |
| CN107130873A (en) * | 2016-02-29 | 2017-09-05 | 福特环球技术公司 | Moving object detection for power door system |
| 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 |
| CN110316055A (en) * | 2018-03-29 | 2019-10-11 | 丰田自动车株式会社 | Rear monitoring device |
| CN112248933A (en) * | 2020-10-28 | 2021-01-22 | 上海博泰悦臻电子设备制造有限公司 | Control method and device for preventing collision of vehicle door and computer storage medium |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105329167A (en) * | 2015-12-11 | 2016-02-17 | 安徽工程大学 | Vehicle door opening early warning system and safety protection method thereof |
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| CN107130873A (en) * | 2016-02-29 | 2017-09-05 | 福特环球技术公司 | Moving object detection for power door system |
| CN105781275A (en) * | 2016-03-28 | 2016-07-20 | 安徽工程大学 | Vehicle safety door opening protection system and control method thereof |
| CN105882519A (en) * | 2016-04-11 | 2016-08-24 | 武汉理工大学 | Anti-collision device and control method for door opening after vehicle parking |
| CN106347210A (en) * | 2016-08-31 | 2017-01-25 | 东风汽车公司 | Automobile door-open early-warning system and method |
| CN110316055A (en) * | 2018-03-29 | 2019-10-11 | 丰田自动车株式会社 | Rear monitoring device |
| 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 |
| CN112248933A (en) * | 2020-10-28 | 2021-01-22 | 上海博泰悦臻电子设备制造有限公司 | Control method and device for preventing collision of vehicle door and computer storage medium |
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