Heart state apparatus: Photograph the eye shot that how enlarges a driver like supervisory system
[introduction] Che Jingzhong’s object looks closer than its the real security that this one information is course test and verify warns —— , will a few years warning drivers all the time, the view that rearview mirror place reflects and reality have difference a bit. Although have its limitation, but car lens still is the important equipment on the car, can help a driver turn around or change. However, advanced nowadays drive support system (ADAS) the reflex that surmounted car lens, offerred for the driver like the head through photographing be based on drive the patulous perspective of the seat.
Photograph like supervisory system (CMS) also be called electronic lens or intelligent lens, aim to provide car lens experience in order to photograph like head and the form of indication screen. Imagine, look at rearview mirror to display screen, what can see car hind is panoramic. When you look at side-glance lens, you can see one can show the high resolution of car displays screen on the side of you. These scenes are becoming reality, other function (if the scotoma system that monitor is mixed,jockey support system) also becoming reality.
Understanding arrives from car lens currently the changeover of CMS is very important. The car nowadays already used ADAS function at car lens in the system, this is strange. In going 10 years, most new car is in car is hind increased to photograph like the head, perhaps will photograph installation resembling a head to be on existing rearview mirror, installed indication screen inside the car, the person that so that be,drive offers car rear or lateral is different perspective.
Graph 1 showed this backsight is photographed like head and the wiring of indication system. Backsight shows screen is built-in rearview mirror, cable leads to car hind.
Graph 1: Rearview mirror indication screen and backsight are photographed like the head, use at panoramic or backsight
Because photograph,be located in like the head on car lens, so side-glance lens differs somewhat. Side-glance lens still is used at examining, but normally, when driver open direction the lamp or when backing a car, its photograph ability resembling a head to be able to work. During turn or changing, photograph the information recreation that goes up to dashboard like the head to show screen outputs video to convey, show with side-glance lens itself has different point of view a bit possibly, if pursue,2 are shown.
Graph 2: Information recreation shows screen to go up indication belt photographs the side-glance lens that resembles a head
Had said palpability introduces a car currently before lens and photograph the CMS that is united in wedlock like head and indication screen appearance to configure, notable is, through be in car is hind install or two are photographed like the head, can realize CMS rearview mirror to change.
From car rear in light of, into picture implement the DS90UB933 that video data inputs TI is collateral interface is serial implement or have photograph like serial interface (CSI) – the DS90UB953 of 2 is serial implement. Pass these data flat monitor next (FPD) – Link III coaxial cable is serial string together to DS90UB934 or DS90UB954 solution implement, output applied processor to undertake video is handled next (for example JacintoTM TDAx processor) , show next go up in rearview mirror indication screen. If show screen is far from Jacinto application processor, need to show interface is serial implement reconcile string implement pass data coaxial cable again road by. You can use DS90UB921 and DS90UB922 Gong Lula respectively (RGB) the format is serial implement reconcile string implement, or, if you want to use the indication screen of higher resolution, can use DS90UB947 and low pressure of DS90UB948 open a way to differ minute of signal to show interface (LDI) parts of an apparatus.
Graph 3 showed what using applied processor board the join between these equipment when holding indication screen.
Graph 3: Block diagram of rearview mirror system
The 2nd CMS is side-glance lens changes part. Photograph the same position that must be located in Che Jingyuan to come like the head. Should photograph the video data that resembles a head to show the perspective that the driver is pleasant to the eye in lens. For this, will photograph data resembling a head serial change and send through FPD-Link III coaxial cable be located in door upside or display screen remotely what rearview mirror shows screen is medium. Have the aid of is photographed mix like the head indication screen, side view can present position of directer line of sight for the driver nowadays. For example, if the indication screen of side view and back view is included in rearview mirror, criterion the driver needs to examine a position only.
Another kind of choice that side-glance lens changes is add with different perspective with the first photograph parity resembling a head the 2nd photograph like the head. With the standard Che Jingxiang is compared, the advantage of this kind of setting depends on, have the aid of differs twice of angle photograph like the head, it is OK like the head that one is photographed use at offerring side-glance lens perspective, and it is OK like the head that the 2nd is photographed to blind area detects and collide alarm function offers broader view. Graph 4 showed double photograph lens of side-glance resembling a head to change system.
Graph 4: Side-glance lens changes systematic block diagram
You may ask now, if the driver passes Chejing to be able to realize the function with same much, so why they still need to photograph mix like the head indication screen. It is OK like the head that the answer depends on photographing provide a function alone through car lens. If have side-glance lens only, avoid side direction to collide to depend on completely driver. Resemble a head through photographing, can detect before changing potential collision, activation next car warns alarm, prevent a driver to make unwise conduct thereby. Contain wide visual field (FOV) backsight photographs backsight of narrow like head or alone type focusing to photograph the panoramic back view that resembles a head to be able to be the person that drive offer different line of vision, decrease or eliminate the blind area that uses car lens to cannot discover only.
But this is one begins merely, to make car changes own system from driver support system, can CMS compositive in sensor confluence system. CMS is possible with ultrasonic even radar photograph is united in wedlock. Backsight and side-glance photograph the confluence that resembles head and ultrasonic to be able to assist a driver when jockey, can jockey for you even. With rearview mirror shirt-sleeve radar will to change and avoid flank collision to provide additional safeguard.
Should understand more about how realizing the information of sensor confluence, examine heart state apparatus to assist sensor confluence about using CMS and ultrasonic at jockeying please or will before buy is photographed use at like head and radar before buy sensor is shirt-sleeve in order to undertake driveway deviate calls the police, the pedestrian detects the follow-up Bo Wen of auxiliary even apply the brake.