ActivMedia Robotics

Appendix B

Motor-Power Board

The Pioneer 2 and PeopleBot robots have a separate Motor-Power board which, in conjunction with the microcontroller, provides power for motors as well as conditioned power for the standard and accessory onboard electronics. It also contains buffered

Figure 29. Pioneer 2 Motor-Power Board

pass-through connectors for the motor encoders. An optional power package ("computer ready") is available for the onboard computer system.

User Power Connections

On the Motor-Power board, four sets of unswitched battery (Vpp) and DC:DC- conditioned 5 VDC (Vcc) power, with power ground (Vpp), are available for accessory and custom electronics on a 12-pin Molex-type latch-lock (100mm) connector. Vcc gets shared with the microcontroller and accessories con- nected to that board (Appendix A). The maximum Vcc power available with standard robot models is 1.5A.

Table 23. User Power Connector J1

Pin #

Connection

 

Pin #

Connection

1

Vcc

 

7

Vcc

2

Gnd

 

8

Gnd

3

Vpp

 

9

Vpp

4

Vcc

 

10

Vcc

5

Gnd

 

11

Gnd

6

Vpp

 

12

Vpp

Onboard Computer Option

With the "computer-ready" option, the Motor-Power board is specially populated with connectors and circuits to provide separate DC:DC conditioned, 7A @ 5 VDC power to an onboard computer and its accessories. And, in conjunction with software, the circuit provides for automatic, unattended, crash-less shutdown of the onboard computer, either when manually powered down or when the battery voltage drops below 10 VDC.

Power Switch (J7) and Delayed Shutdown Logic

A simple SPDT switch controls logical power to the computer-power section of the Motor- Power board. When ON, the switch provides Vpp to the input of a voltage comparator

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Pioneer 2 / PeopleBot manual Appendix B, User Power Connections, Onboard Computer Option

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.