Super Purchasing for Gps Fleet Tracking Companies - adas camera Fatigue driving camera DB-A501 – Dragon Bridge

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Instruction Book of ROADEFEND DB-A501 Driver State Monitor System I. Product Synopsis DB-A501 is a bran-new Driver ADAS Safety Monitor System based on the fifth generation of fatigue model’s algorithm, which gives a warning of fatigue drive and kinds of dangerous driving behaviors by means of image recognition and driver’s mental state analysis to decrease accidents caused by fatigue drive. Furthermore, DB-A501 is also capable of sending abnormal data and videos via 4G network to an end-us...

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Super Purchasing for Gps Fleet Tracking Companies - adas camera Fatigue driving camera DB-A501 – Dragon Bridge Detail:

Instruction Book of ROADEFEND


Driver State Monitor System


I. Product Synopsis

DB-A501 is a bran-new Driver ADAS Safety Monitor System based on the fifth generation of fatigue model’s algorithm, which gives a warning of fatigue drive and kinds of dangerous driving behaviors by means of image recognition and driver’s mental state analysis to decrease accidents caused by fatigue drive. Furthermore, DB-A501 is also capable of sending abnormal data and videos via 4G network to an end-user platform management center to avoid occurrence of accidents by immediately taking effective measures.

1. Value of Fatigue Warning

Fatigue has long been an inevitable problem that is controlled to an extent for drivers, for example, when driving two hours at a speed of 100km/h, the driver has to struggle to stay awake on account of his lower levels physiological functions followed by inattention. In general, accident rates are extremely high when the driver drives more than 6 hours a day or is lack of proper rest, for example, only having a rest of less than four or five hours last night. In addition, with the popularity of smart phones, more and more drivers are used to playing his cellphone while driving, it also will cause a popularity of accidents. 

A set of terrible statistics has already been reported, indicating that 72% of all accidents occur due to drivers themselves and 25~30% thereof are caused by fatigue drive; that 40% of all serious and fatal accidents are fatigue related; that 70% of all drivers will fall asleep at the wheel on the highway and specially happens to those who likes playing their cellphones while driving.

Therefore, it is a great value to eliminate fatigue at driving for sake of the drivers, families, companies, as well as the society.

2. Host introduction

Power supply and signal line interface

It works when power connectors are connected to corresponding power interfaces on the DB-A501 device; the signal line includes video cable, communication line, etc.

SD card slot

SIM card slot

GPS&4G antenna terminal


产品描述2200 产品描述2198 

Figure 1. Schematic Diagram of Appearance of DB-A501 Active Defense System

3. Product specifications

Table 1

DB-A501 product specifications

          Working Daylight Night
  Type DB-A501     -    
      ●Yes ●Yes
  Product         Near- Sun-
        Glasses sighted
  Size 95x90x35     glass
      support eyeglass
      Fatigue   ●yes ●yes
  Weight 400   Sensitivi Automatic
  (g)   function ty
  Camera night     Volume SD card configuration
  vision     adjustm /platform remote
Basic   Functional  
  camera   ent adjustment
info.   information  
  Analog       4G Alarm picture upload
  image Yes        
          Alarm video upload
  Power DC    
  supply 9V~36V        
        Other GPS Vehicle localization
        RS232- communicating with
          1 RDT402
  Power 7W     RS232- communicating with
          2/RS485 external devices
          CAN supporting CAN

instruction Book Of DB-A501

4.Function Instruction

1) All Kinds of Warning

The default starting speed is 15km/h for all below kinds of warning (except for the speeding warning)

Table 2

  Warning     Description       Voice Reminder     Evidence     Default Voice  
  Types                             Documents     Switch  
  Distraction   When   the driver is   “du—du—du— ”   Picture   ON
  (level 1)   found in the drowsiness                  
        state, or found bowing                  
        to  look  at  the  mobile                  
        phone and taking other                  
        actions, the device will                  
        issue   a   distraction                  
  Dangerous   If  the  driver  does  not   “du-du-du-du!,Take   Picture and   ON
  driving (level 2)   restore   the normal   care, take care!”   small videos      
        driving posture after the                  
        distraction warning is                  
        triggered, a dangerous                  
        driving warning will be                  
  Cover Warning   Once the   system is   “Ding-ding”   Picture and   ON
        covered   by   some         small videos      
        obstructions such as a                  
        towel,  it  will  send  a                  
        cover warning after 10s.                  
  Face Missing   When the driver’s face   “Ding-ding”   Picture and   ON
  Warning   departures or is terribly         small videos      
        covered for more than                  
        10s, it will trigger the                  
        off-site warning.                      
  Look-Aside   When the driver looks   “Do onot look aside”   Picture and   ON
  Warning   at the left or right side         small videos      
        for more than 5s, it will                  
        trigger   the   looking-                  
        around warning.                      
  Smoking   When the driver smokes   “Do not smoke”   Picture   OFF
  Warning   while driving, it will                  
        trigger   the   smoking                  

2) Sensitivity

In Test Model

After entering into the test model, the sensitivity will be fixed as 1s.

In Normal Model

DB-A501 can make a comprehensive judgment and adjust the sleepiness warning sensitivity automatically according to the vehicle speed, driving time period and the driver’s driving behaviors etc., and the adjustment is made at an interval of [1s, 3s].

Driver Characteristics and Posture Self-calibration

After DB-A501 is started and the vehicle speed exceeds 30km/h (which can be set), the system will enter a period of 45-second self-calibration (the calibration time is 10s in test mode). During this period, core parameters of the system will be calibrated according to individual characteristics and driving posture of the driver. Please keep a normal driving state in the process, please do not simulate fatigue and sleepiness. Furthermore, the device will not issue a looking around warning before the calibration is completed. After the calibration is completed, the device will send a reminder voice like “beep~beep” and the system can normally trigger a posture warning.

Analog Image Output

DB-A501 provides real-time analog image output in NTSC or PAL format. The signal can be used to calibrate the orientation of installation, and can also be connected with almost all the popular Car DVRs (Digital Video Record) on the market to store the videos about the driver’s driving. The standard output can be adjusted through a DIP switch 4#; the

PAL system is default; and by dialing down, you can switch to the NTSC system

Calling When the driver holds a “Please   concentrate   Picture OFF  
Warning phone and keeps talking on driving”        
  for more than 6s, it will          
  trigger the phone          
Yawn Warning When the driver yawns “Please have a rest”   Picture ON  
  while driving, it  will          
  trigger the yawn          
Speeding When the   vehicle’s “Your speed is over   Picture OFF  
Warning speed exceeds the  set the limit, please slow        
  value, it will trigger the down”        
  speeding warning.          

Video Storage

DB-A501 can store the driver’s real-time driving behaviors into a high-speed TF (higher than Class 10) card by 3 minutes as a unit and the default is standard definition; for example, a 8G card can store videos for about 3 days’ driving behaviors; its resolution can be configured as high definition storage (720P); and the SD card can support up to 256G.

4G communications

DB-A501 can transmit alarm information, alarm videos and other related data to the fatigue monitoring management platform via 4G communications for easy supervision and management.

Input/Output Interface

DB-A501 supports three-channel I/O signal inputs, including two-way switching signals and one-way PWM speed signal. Meanwhile, it also support two-way switching signal outputs, which can control some accessory devices like the vibration cushion or refreshing smell generator to trigger relevant actions when the sleepiness warning happens.

Communication Interface


DB-A501 has two-way RS232 output interfaces, one can be seamlessly integrated with Roadefend ADAS forward active safety device RDT-402, and the other can communicate with another terminal devices.


DB-A501 has an one-way CAN interface, which can receive the vehicle’s CAN signal.

Alarm Events Recording

DB-A501 can make a record for each alarm information, including the position, event, alarm type and the relevant file name of alarm video, etc.

Local Storage of Alarm Images

DB-A501 will create folders with in an SD card and store the alarm images of the day sorted according to types of fatigue warming (sleepiness, calling, smoking, etc.).

System Upgrade

The device is started by placing the upgrade package file in the TF card; and once you

hear a voice like “beep, beep, beep” and the device is restarted, it means the device

upgrade operation has been done.

II. Installation Instruction

1. Installation requirements

Fix DB-A501 by screws to lean to the right side (within a range of 30 degrees) in front of the driver and tilt up at an angle of 5~30 degrees; connect the lead terminal with the power supply wiring harness; and connect GPS antenna as well as 4G antenna.

DB-A501 can be adapted to a distance range of 60 cm~120 cm, and it is advised that DB-A501 should be installed at about 80 cm.

产品描述9834 产品描述9835

Figure 2. Top view of Installation Figure 3. Side view of Installation

2. Product list

Table 3

Product List

Serial No. Parts Name Quantity
○1 Bracket1 1
○2 Host 1
○3 Round head screw 4
○4 Bracket2 1
○5 Wire harness 1
○6 GPS Antenna 1
○7 3G Antenna 1
○8 Microphone and SOS button 1
○9 Instruction book 1


Bracket 1 Host Round head screw Bracket 2

Figure 4. A schematic diagram of parts

3. Calibration

Adjust the angle of DB-A501 up and down to ensure that the driver’s face is in the center of the screen of an external display.

4. Work status

After the vehicle starts, DB-A501 will start immediately; after about 8 seconds, it will make a sound indicative of start-up completion, indicating that the product is ready for work.

After the vehicle’s speed reaches the set speed value, the product will enter the monitoring state, monitor the driver in real time, and issue fatigue warning; according to factory default settings, when the speed exceeds 15km/h, the device will start a state detection function (except for the type of posture warning) and when the speed exceeds 30km/h or more, posture calibration will be performed.

After the posture calibration is completed, all warnings can be triggered. Notes: the starting speed of fatigue warning function for DB-A501 is 15km/h.

5. Parameters Configuration for SD (TF) card

Through the system upgrade, you can adjust parameters of the device, such as volume, sensitivity, time zone.

III. Electrical Properties

Table 3

DB-A501 Electrical Properties

Operating Voltage +9V ~ +36V
Rated Power 7W
Warning Instantaneous Power 10W
Operating Temperature Range -20℃~ 70℃
Storage Temperature Range -30℃~ 85℃
Working Humidity 0 ~ 90 RH%±5%

IV. Failures and Solutions thereof

If you experience the following problems when using the product, please resolve the failures with the aid of the following countermeasures.

The general problems that may have an impact on this product are as follows:

Table 4:

Failures   Possible Causes Solutions

The driver’s face is

Referring to the Instruction Book,

out of the visible

adjust the position or angle of the

scope of the camera

device placement.

or beyond the effective distance.

No warning sounds when eyes The vehicle is in a The fatigue warning function will be
are closed for a long time. activated only when the vehicle’s
stopped state.
  speed exceeds the set speed value.
    Make sure that the GPS antenna is in
  GPS satellite search good contact and that the top of the
  fails. antenna or the location of the vehicle
    is not covered.
  The ACC and power Make sure that the power supply
The device cannot boot up supply are not well
wiring harness is reliably connected.
  The black Plexiglas  
The fatigue warning is not in front of this Clean this brown and black Plexiglas.
product is too dirty.  
The installation Install the product at an appropriate
  distance is too close. distance.
    Maintain a correct posture for 10s in
No warning is triggered when Calibration is not test mode and when hearing a beep-
the driver looks around. completed. beep tone, you can test the posture
The device is not on the line. The SIM card is not Check the SIM card, start the device
to hear a tone indicative of the
  inserted, or in arrears
  successful network connection, when
  the device can be on the line.

1. Precautions:

Clean the black Plexiglas in front of this product for sake of the video capture and the product performance;

Make sure that the product is located at appropriate angle and is fixed firmly for the sake of the product performance.

V. Applicable Vehicles

Passenger and cargo transport vehicles, dangerous goods transport vehicles, mining vehicles, taxis and school buses and other vehicles.

VI. Friendly Reminder

1.Will you drive when you are in fatigue?

Fatigue driving is different from drunk driving, and people always choose to or have to drive even though they feel tired because they claim they are alert to fatigue or they are in a hurry sometimes. Therefore, there is inevitably the following problems:

The first problem: people will still choose to drive even though they are tired because they have to do so;

The second problem: the drivers think that they can control the fatigue. When having a sense of fatigue, a driver may argue that he can eliminate it through conventional methods such as, having a cup of coffee and other refreshing drinks, smoking, turning music volume up, opening windows, scratching his head, twisting his neck.

However, we should accept the fact that fatigue cannot be eliminated by means of relying on subjective thoughts of the driver with the aid of applying the above-mentioned methods to avoid falling asleep. Those irritating behaviors, such as smoking, increasing the volume of the radio, drinking coffee, opening windows cannot actually prevent “drowsiness–induced substance” from influencing the brain, and conversely, they cause paralysis to the driver.

Do you know? Drinking excessive coffee can cause insomnia, headaches, allergies and anxiety.

Do you know? It takes more than 10 minutes for caffeine to get into your blood system to finally generate a stimulus, so a cup of coffee would not have such a quick play as required but you have already fallen asleep. Also, if you have become accustomed to effects of caffeine, stimulating effects will be weaker.

Do you know? Opening the window and increasing the volume of the radio can indeed increase your alertness in a short time, but it will not last long.

2.DB-A501 Benefits

DB-A501 employs the method of combining the image recognition with the driving behavior analysis to give a well-intentioned warning when you are tired and inattentive. Once serious

fatigue occurs, the system will give you a wake-up call in time, which is a critical moment between life and death.

What a critical moment between life and death, seizing this moment, the wife can give her rushing husband a reminder;

What a critical moment between life and death,

seizing this moment, the driver will not worry about his safety; What a critical moment between life and death

seizing this moment, the passenger will not worry about his safety. Hindsight is not our aim, what is important is to reduce tragedy.

VII. Security Warning

Before using the product, please be sure to carefully read the following precautions to ensure safety. Warning 1: In order to put the fatigue warning system to be in good account, users of this product are responsible for the proper installation and the safe utilization of the system so as to ensure this product will not interfere with the normal operation of the vehicle and other vehicle safety devices, for example, this product shall not obstruct the driver’s driving vision, which may cause accidents and injury.

Do not install this product in a position where the driver’s driving vision is obstructed.

Do not install this product on top of airbag dashboard or at the area where the airbag deploys.

Do not install this product in the position where passengers are prone to bumping into the product.

Warning 2: This fatigue warning system is just an ancillary product for safety aiming to reduce probability of accidents caused by driver fatigue, thereby reducing losses caused by driver fatigue. Drivers themselves are still responsible for the normal operation of the vehicle, so they shall not rely on this product to keep driving in the case of severe fatigue.

VIII. User Notice

The product is powered on; and after the vehicle travel speed reaches the speed value (default 15Km/h) for triggering the fatigue warning function, the product will enter the normal working condition. 

The product can effectively reduce the probability of accidents caused by driver fatigue, but cannot eliminate the symptoms of driver fatigue, so the driver needs to consciously have a rest in order to completely eliminate fatigue symptoms.

The user needs to cooperate and know that our product needs to access the signal, such as power supply, GPS antenna, and 4G antenna.

Product detail pictures:

Super Purchasing for Gps Fleet Tracking Companies -
 adas camera Fatigue driving camera DB-A501 – Dragon Bridge detail pictures

Super Purchasing for Gps Fleet Tracking Companies -
 adas camera Fatigue driving camera DB-A501 – Dragon Bridge detail pictures

Super Purchasing for Gps Fleet Tracking Companies -
 adas camera Fatigue driving camera DB-A501 – Dragon Bridge detail pictures

Super Purchasing for Gps Fleet Tracking Companies -
 adas camera Fatigue driving camera DB-A501 – Dragon Bridge detail pictures

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