alarm pre-record time (range 0-60 seconds), the alarm record delay time (range 30-900 seconds),
and the alarm output time (range 5-240 seconds). The alarm output time setting can depend on
external alarm equipment.
If installing corresponding external alarm input devices, such as an emergency switch button,
switch door magnetic door, sudden braking sensor and other sensors, the alarm settings of these
devices include several types as follows:
Level input
MDVR REAR PANEL ALARM INTERFACE
Figure 4-2
Pulse sensor
C:G-SENSOR ALARM RECORDING.
As shown in Figure 3-21, the G-SENSOR can be understood as a three-dimensional X, Y, Z coordinate
axis, which demonstrates vehicle's three status sets respectively: up and down, left and right, back and
forth. The up and down bumps, speed-up, sudden braking, side tumbling, sharp turns, etc. along
the course of vehicle can be shown on the X, Y, Z axis. The value of the threshold requires setup.
After installing the sensor in a vehicle, calibration of the X/Y/Z parameters is required; then during the
operation, measure sudden braking and
acceleration, range of value of up-and-down bumps, variation of
value for left-and-
right sharp turn, etc. to determine which axis has big changes. These operational statuses
will display and change in real time. With thresholds set and record enabled, the device will
start recording
when vehicles exceeds a threshold limit.
D: MOTION DETECTION ALARM RECORD. -TOOLS-MOTION DETECTION
As shown in Figure 3-29, turn on the enabling switch, set detection sensitivity to high, medium, or
low
according to requirements (normally set to medium). Next, set motion detection area by diagonal setup
(see Figure 3-30). By default, recording is enabled; the MDVR will trigger recording and generate alarm
record files when movement occurs in the image. (Note: All settings are in effect only after being saved.)
MENU - VEHICLE INFO - G-SENSOR
""
SYSTEM MENU
Figure 4-3
21
MDVR-50 User Manual
A: SENSORS INPUT ALARMS. SYSTEM MENU-VEHICLE INFO-SENSOR SETUP
In the menu shown in Figure 3-20, choose high or low trigger level, and switch on recording. This
menu corresponds to the MDVR's six external alarm input
"SENSOR IN". Connect these inputs
to the corresponding sensing switch equipments, like magnetic door, emergency
switch button,
turning lamp switch, brake pedals (shown in Figure 2-13) and etc. A basic connection diagram is
show in Figure 4-2.
B: OVERSPEED ALARM SETUP
. SYSTEM MENU-VEHICLE INFO-SPEED SET
UP
If a vehicle uses GPS to acquire speed, as shown in Figure 3-22, the GPS signal should be strong.
The threshold for an overspeed alarm should
be set to the maximum speed limit.
The switch enabling recording when vehicle when the speed exceeds the limit should generate
an alarm and trigger recording simultaneo
usly.
If a vehicle acquire speed from itself, a connection
to the speed pulse sensors is
necessary. This sensor is used to calculate
the speed ratio (the coefficient = pulse/speed). Connect
the pulse sensor to the two lines of the ve
hicle ports-SPEED-A and SPEED-B. The speed ratio is
determined using the set speed and the pulse when the course of vehicle is moving.
A simplified connection is shown as Figure
4-3.