Appendix B: Motor-Power Board Connectors

which output controls the computer's DC:DC voltage converter. Designed to provide for crash-less shutdown of the computer in the event of a power brownout or for unattended shutdowns, if Vpp drops below 10 VDC, the comparator automatically initiates a two-minute delay before computer power (not system-wide) shutdown.

Similarly, when the computer power is manually switched OFF, the comparator is grounded (below 10 VDC, of course) and the same two minute-delayed shutdown occurs.

In all cases, power shutdown, but not necessarily computer software shutdown, is canceled if power is restored to above 10 VDC, either by connecting a battery charger or by hot-swapping the batteries.

With older Motor-Power systems, you may disable the two-minute delay circuitry (switched or low-voltage shutdown immediate) by moving the jumpers on both J3 and J6 on the Motor-Power Board to the pins opposite their ON position.

Power-State Logic

A 9-pin DSUB receptacle (P1) on the Motor-Power board provides a logic-level shutdown indicator (DCD pin 1) which state goes low when computer power shutdown is first initiated. The onboard computer may use this line state to initiate software-mediated shutdown, such as provided by genpowerd for RedHat© Linux PCs.

Table 24. Power State 9-pin DSUB receptacle (P1)

1

2

3

4

 

5

6

 

7

8

9

DCD

nc

nc

pin 6

nc

pin 4

nc

nc

Gnd

 

 

 

 

10-

20K adj.

 

 

 

 

 

 

 

 

across 4 & 6

 

 

 

 

Computer Power

Table 25. Computer power connector

Acommon 4-conductor, bevel-keyed connector (J5) provides 5 VDC @ 7A power for the onboard computer, and battery power for the optional 12VDC fan.

Pin #

Connection

1

Vpp

2

Gnd

3

Gnd

4

5VDC @ 7A

64

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Pioneer 2 / PeopleBot manual Power-State Logic, Computer Power
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2 / PeopleBot specifications

Pioneer 2, also known as PeopleBot, is an advanced mobile robot platform heralded for its versatile design and robust capabilities. Developed by the renowned robotics company Adept Technology, Pioneer 2 has become a staple in the field of mobile robotics, widely utilized for research, education, and practical applications in various industries.

One of the standout features of Pioneer 2 is its exceptional mobility. The robot is equipped with differential steering, allowing it to navigate complex environments with precision. Its compact and sturdy chassis enables it to traverse a variety of terrains, making it suitable for indoor and outdoor exploration. This mobility is further enhanced by an adaptable wheel configuration, allowing for smooth movement even over obstacles.

In terms of technologies, Pioneer 2 is outfitted with an array of sensors that facilitate autonomous navigation and obstacle avoidance. These sensors include laser range finders, infrared sensors, and bumpers, which work in tandem to map the surrounding environment and detect potential hazards. This capability is critical for applications in areas such as warehouse automation or reconnaissance tasks, where safe navigation is paramount.

Pioneer 2 also supports extensive software frameworks, notably the Robot Operating System (ROS). This compatibility allows researchers and developers to leverage a vast library of tools and algorithms, expediting the process of programming and deploying robotic applications. Additionally, the platform can be integrated with various payloads, such as cameras or grippers, expanding its functionality further.

Another significant characteristic of Pioneer 2 is its user-friendly design. The robot comes with an easy-to-use programming interface that empowers users with varying levels of expertise to engage with the technology. Educational institutions often employ Pioneer 2 in robotics courses to provide students with hands-on experience in programming and operating robotic systems.

Powering Pioneer 2 is a rechargeable battery system that ensures extended operation times. This feature is particularly advantageous for fieldwork applications where connectivity to a power source may not be readily available. Importantly, the robot’s modular design facilitates maintenance and upgrades, allowing users to keep their systems current with advances in technology.

Overall, Pioneer 2 (PeopleBot) exemplifies innovation in mobile robotics with its outstanding mobility, advanced sensing technologies, compatibility with leading software frameworks, and a design focused on ease of use and adaptability. It continues to be a preferred choice for researchers, educators, and professionals in the rapidly evolving landscape of robotics.
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