Specifications for
DRIVER’S REAR VIEW CAMERA
August 2001
Sekai Electronics Inc. 13570 Larwin Circle Santa Fe Springs CA-90670
General Description
Introduction
A camera system designed to assist the driver when backing up (reversing) the vehicle. The camera unit mounts at the far back of the vehicle providing an unobstructed view of the surrounding. To give the driver a familiar view the camera provides a picture that is reversed, imitating what is seen in a rear view mirror. Additional assistance is given by the symbology superimposed onto the picture illustrating the vehicle width at different distances, telling the driver how close a possible obstruction is, and if it is in the vehicle path. The picture from the camera can be displayed on a standard video monitor (CCIR or EIA type). A door mechanism protects the camera from mud and dust when it is not in use. The door can be electrically activated either by manual control or automatically when the driver put the vehicle in reverse.
The system consists of two line replaceable units (LRU), one camera unit (RVC-01) mounted on the outside of the vehicle and a power supply / symbology generator (MBC-108BA).
Mechanical Interface
The RVC-01 is mounted to the vehicle by four bolts; see the attached drawing for detailed configuration. As the camera is a fully external unit, only a minimum of
modification to the vehicle is required, limited to cable feed-throughs and installation of mounting bolts. The camera has to be installed in a position that gives it an unobstructed rear view.
The MBC-108BA can be installed where space is available inside the vehicle, but preferably in close proximity to the camera. See attached drawing for detailed configuration of the control box.
Electrical Interface
In the current version all connectors are of military type D38999 series III.
RVC-01
The Camera unit has two electrical interfaces with separate connectors:
No. Function Connector type
J1 Video camera interface D38999/20WA35PN J2 Motor door interface D38999/20WA98PN
Pin Configuration J1
1 +12VDC 2 12VDC return 3 Spare
4 Video Signal
5 Video Signal Return 6 Spare
Pin Configuration J2
A +28V B +28V return
C +28V / 0V (+28V =Open hatch, 0V=Close hatch)
MBC-108BA
The MBC-108BA has three electrical interfaces with separate connectors:
No. Function Connector type
J1 Vehicle 28VDC power input D38999/24WA98PN J2 Video camera interface D38999/24WB35SA J3 Video output interface D38999/24WC26SB
Pin Configuration J1
A +28VDC B 28VDC return
Pin Configuration J2
1 Camera Day +12VDC 2 Camera Day 12VDC Return 3 Video In
4 Video Return 5 Reserved for Heater 6 Reserved for Heater 7-13 n.c.
Pin Configuration J3
1 Video Out / Return (Coaxial) 2 n.c.
A Reserved B Reserved C n.c. D n.c.
E Cable presence check F Cable presence check
Field of regard
The rear view camera shall be installed in a fixed position hard mounted to the vehicle. It is recommended that the installation be made so that the elevation can be adjusted during the first setup, allowing for calibration of the distance scale.
Sensor
The system has a Monochrome Inter-line type 1/3” CCD Image Sensor, utilizing COTS technology. Available in either CCIR or EIA format offering 512H x 582V or
512H x 492V effective picture elements respectively.
The minimum object illumination producing a useful image is 0.05 Lux (50 IRE). Exposure is controlled by electronic shutter, eliminating the need for moving parts inside the camera lens.
Optics
With an f= 3.8 mm lens (F 2.0) the resulting field of view (FOV) of the system is 72° Horizontal and 54° Vertical. This very wide field of view is selected to allow the driver to see objects that are close to the vehicle and to the side.
Volume constraints
Armor cut out
The camera unit is fully external; the only armor cut out required is provisions for connectors to camera and motor door.
Below armor
The integrator can install the power supply / symbology generator (MBC-108BA), wherever suitable inside the vehicle.
Reverse Scan
By reverse scanning the CCD sensor the camera provides an inverted (mirrored) picture on a standard monitor. A reversed image is necessary as drivers are generally trained to back up a vehicle by looking in a rear view mirror and this habit is hard to change. The advantage to incorporate this feature in the camera instead of in the monitor is that the same monitor also can be used for applications other than the rear view camera.
Object distance markings
The system is designed to help the driver to detect obstacles that are near area the rear of vehicle, to avoid collisions and simplify navigation when backing up. A symbology generator superimposes a pattern onto the video signal representing the vehicle width at different distances (see picture). The lines in the bottom part of the picture are the 3-meter mark used to calibrate the elevation of the camera during installation. Symbols show the vehicle path (the width of the vehicle) at different distances, in this case 5, 10 and 15 meters behind the vehicle. The pattern can be customized to fit the requirements and preferences of the customer.
Display
Any monochrome or color video display can be used, please specify if a CCIR or EIA signal is preferred.
Camera video signal output is 1.0V p-p, Composite Video according to CCIR or EIA (specify at the time of order)
Dynamic Range
The camera system has a dynamic range better than 80 dB, corresponding to 26 F-stops.
Environmental Conditions
High Temperature
For outside installations: MIL-STD 810E, method 501, procedure II, Operation at a constant temperature of +60°C for 16h (Function During, FD)
For inside installations: MIL-STD810E, method 501, procedure II, Operation at a constant temperature if +50°C for 24h (Function During, FD)
Storage: MIL-STD810E, method 501, procedure I, Storage at a constant temperature of +71°C for 24h (Function After, FA)
Low Temperature
The rear view camera system shall meet requirements when subjected to MIL-STD810E, method 502, Low Temperature
Procedure II, Operation at a constant temperature of -40°C for 24h (FD) Procedure I, Storage at a constant temperature of -46°C for 24h (FA)
Temperature Shock
The rear view camera system shall meet requirements when subjected to MIL-STD810E, method 503.3, Temperature Shock, between -40°C and +50°C; Temperature change 5 cycles x 12h (FA)
Temperature Change
Water Jet
The camera shall meet requirements of IEC 529, (FD), Ipx6, C. (100 l/min)
Humidity
The camera shall meet requirements of IEC 60068-2-30, Db, +25°C to +55°C, RH>95%, 6 cycles x 24h (FA)
Sand and Dust
MIL-STD-810E, method 510.3, Procedure I (FA).
Vibration
MIL-STD-810C, proc VIII, curve W, 2 axes x 3 hrs
Vertical axis (proprietary) levels exceeding curve W, 64 hrs
Shock
Electromagnetic Compatibility (EMC)
Resistance to Radiated Interference
MIL-STD461C, part 4 & MIL-STD462, Ground Applications Army: RS02 (FD)
RS03 (FD), 50V/m, 14kHz-10GHz, according to MIL-STD462
Resistance to Conducted interference
Applicable to power supply leads to/from the product or sub-units. MIL-STD461C, part 4 & MIL-STD462, Ground Applications Army:
CS01 (FD) CS02 (FD) CS06 (FD)
CS11, 10A @ 20, 40, 60, 70, 80, 100 MHz
Generated Radiated Emission
Applicable for the Product or Sub-unit incl. Cable harnesses. MIL-STD461C, part 4 & MIL-STD462, Ground Applications Army:
RE02 (FD)
Generated Conducted Emission
Applicable to power supply leads to/from the Product or Sub-units. MIL-STD461C, part 4 & MIL-STD462, Ground Applications Army:
CE01 (FD) 30Hz – 15kHz CE03 (FD) 15kHz – 100MHz
Resistance to interference in power supply system
The electric system shall be tested in accordance with applicable parts of MIL-STD-1275A (AT) excluding alternator mode (FD)
