“Utilizing the Decawave DW1000 UWB chip, the location system used in the museum can measure distance so precisely and inexpensively that we believe this technology will be as transformative to indoor navigation as GPS has been for large-scale navigation.”
-Museum of the Bible
The Museum of the Bible (MotB) is a new world-class museum located in Washington DC, USA. Its purpose is to bring to life the history, impact, and stories of the Bible. To do this, MotB’s goal, from the outset, has been to utilize cutting-edge technology to create an experience unlike any other museum in the world.
One of the major innovations at the museum is the development of its “Digital Guide”, with the aim to encourage deep guest engagement through key features such as:
- Customized, running commentary that educates guests while efficiently guiding them to popular exhibits, theaters and attractions at optimum times, based on location and interests
- Natural, proactive navigation, directing guests to artifacts and exhibits, and away from congested areas
- Visual enhancements such as videos, interactive 3-D objects and augmented reality complementing artifacts and exhibit areas
- Specialized features for group leaders, empowering them to pinpoint the location of family or group members within the building, facilitate time limits, coordinate meal times and communicate with group members throughout the tour
A Challenging Environment for Wireless Technologies
Located just off the Mall in Washington DC, the MotB is based in a converted warehouse. Unfortunately, the building’s concrete and steel heavy construction creates a challenging environment for any wireless technology as it creates shadows and dead-zones that need to be worked around.
A further challenge is the high density of people in the museum, particularly with large tour groups clustering together in specific locations. Such clustering has made first-generation electronic guides notoriously unreliable.
Choosing the Right Technology
For its guides, the museum looked at the full range of competing location technologies, from GPS to Bluetooth to Wi-Fi, and dismissed them all due to their inability to provide the consistent, accurate location needed for the guide to be effective.
MotB instead turned to Ciholas’ solution, powered by Decawave UWB technology that already had proven to be both accurate and reliable in challenging settings like the MotB building.
At the heart of each Guide is a UWB transceiver subsystem, based on the Decawave DW1000 chip, featuring an integral UWB antenna and a dedicated microprocessor to handle UWB communications and computations. In addition, Ciholas added an FM radio receiver for ADA audio delivery, which can be tuned to the proper channel by using the UWB location. The tablet and added electronics are all housed in a custom-made injection molded plastic enclosure with integrated handles, grips, and strap mounts.
On the infrastructure side, to meet the challenges caused by the construction and layout of the museum, Ciholas installed nearly 600 of its UWB anchors to cover 43,000 square meters of floor space over 7 floors.
All the anchors are networked to servers in the basement of the museum that run the Ciholas Ultra Wideband (CUWB) system. The servers manage the anchor network, perform anchor synchronization, perform location computations, keep logs of system data and performance, and manage the Digital Guide update process.
To overcome the issue of high-density of visitors, Ciholas tapped into the flexibility of Decawave’s UWB chips.
As each device needs its own location to be used in the guide app, the Digital Guide implements “nav mode” location to reduce latency, network congestion, and increase reliability. Nav mode operates like indoor GPS, with coordinated UWB signals sent out from the anchors. These are used by the guide to compute its location 10 times per second – good enough for even the swiftest museum visitor. They also enable limitless guides to be located in any given area – so even the largest groups get a great experience.
The Digital Guide also operates in ‘track mode’ as well. This allows the server to compute the device’s location and use that for analytics and other system purposes.
A key part of the system is the location engine, which in this case is a proprietary algorithm developed by Ciholas, called VML. VML is particularly good in real world situations where the UWB signal may be partially or wholly obstructed as will occur in the museum from time to time. The VML algorithm can detect and mitigate when these occlusions occur, thus limiting the effect of bad data on the output and delivering best-in-class performance.
Looking to the Future
The Digital Guide system at the MotB is already delighting visitors. However, the detailed data delivered by the system provides opportunities for further development over time:
- Data analysis will enable the museum to develop heat maps – better understanding what visitors are stopping to look at and how long they spend in different locations. Similarly, the museum can identify where congestion occurs. This gives museum curators the ability to continually improve guest experience by managing traffic flow, identifying popular exhibits, detecting problem areas and notifying guests of upcoming events
- The data can also enable new guide capabilities. Knowing how much time a visitor has and what their interests are, the guide could create a personal tour for them. Even better, with real-time congestion data, the guide could reorganize the tour as it happens to create the best possible experience.
MotB shows how detailed, accurate location data is changing how museums and other public spaces can engage with their audiences, but don’t take our word for it – go and experience it for yourself. See you at the museum!
The Digital Guide:
Building Heat Maps: