Speed DisPlay Device

Introduction:
　 Speed Display Device(SDD),drive the speed to the vehicle to collect with 0.25 seconds frequencies,Show,Saving, Give the sound and light to report to the police when automobile exceed the speed limit, Can carry out numerical type the electronics record that the data deliver to equip through an USB also.

Main Functions
1. Can record speed, of vehicles read time.
2. Overspeed reminding : Buzzer sound of uniform pattern of 2 pulses per second (--) and adequate loudness, and blinking LED on the unit in phase that will be both turned on automatically to alert all passengers in the vehicle when vehicle exceeds it's pre-defined speed limit, and turned off automatically when vehicle travels below this speed limit.
3. Doubtful data of accidents:Vehicle traveling data recorder continually records and memorizes the corresponding vehicle traveling speed before it stops for 15 days with a time interval of 0.25s.
4. Vehicle traveling data:Recorder can continually record data of the driving time for 15 days with a time interval of 0.25s.
5. The base unit of vehicle traveling data recorder owns its unique serial number.
6. It can record the data of first-time installation automatically.
7. Can set messages of identifying code,license number,license sort,driver code ,driver license number,real-time clock,driving license number of motor vehicles verifed by traffic administration department vehicles' top speed.
8. It has USB and standard RS232 data communication interface.
9. A continuous vehicle activity record of 15 calendar days from which the following 3 sets of memories will be readily retrievable. The accuracy of the internal clock for measuring the local time deviate from the standard time by less than 20 seconds per month .
10. Memory of the previous and successive 5 minutes of vehicle activities respect to the local time of such event when the vehicle comes to the latest stop or when the ignition or power switch is turned off.
11. Memory of the previous and successive 5 minutes of vehicle activities respect to the local time of such event when the vehicle acceleration or deceleration exceeds the pre-defined setting of 1G (i.e. acceleration due to gravity or 9.8 m/s/s).
12. The latest 5 slots of memory of the previous and successive 5 minutes of vehicle activities respect to the local time of such events when the vehicle speed exceeds a pre-defined limit.
13. SDD automatically turns off when vehicle engine is turned off to preserve the vehicle batteries without affecting the data stored in the unit. However, vehicle activities shall still be recorded for another 5 minutes before the unit comes into a sleep mode or completely turns off.
14. Data downloadable to PC for analysis.
15. Built-in photo sensor for automatic brightness control to give at least 2 levels of brightness for day and night time viewing (i.e. brighter for day time) to enable better visibility.

Specifications Technology
● Power supply voltage: DC9--DC50
● Power waste: <=80mA
● Speed range:0-250km/h
● Operating contdition:-25℃---80℃
● Data storage: The data can be stored for at least 10 years after the base unit breaks off
● Interface level: adapts to voltages more than 3V
● Overvoltage protection: can bear 36V,and cause no damage
● Short circuit/overcurrent protection: short circuit or overcurrent will not cause damages
● Reverse connect protection: power cord and interface line can be connected randomly (within 36V),and cause no damage
● Recorder switch signal: 8
● Power off protection >=5 years
● Dimension: 300 mm L x 140 mm W x38 mm H
● Display unit weighs less than 1.5 kg. External surfaces shall not have sharp edges, and all corners shall be rounded and padded with soft material against possible head injury
● Red LED display of approximately 100 mm character height
● Displayed speed deviate from that of vehicle speedometer by less than 1%
● Speed sampling rate 4 records per second