摘要:
Systems and methods for collecting travel data include a mobile application capable of being executed on a mobile computing device and configured to monitor and log travel data related to travel of the mobile computing device, and to communicate the travel data over a network. A networked data processing device may be coupled to receive the travel-related data from the network and analyze the travel-related data to identify a mode of travel of the mobile computing device. A graphical user interface allows a user of the mobile computing device to verify accuracy of the identified means of travel.
摘要:
A dump truck includes a plurality of rear wheels (15) rotatably attached to a frame (11) and two GPS receivers (101, 102) arranged to be dislocated from each other in an anteroposterior direction of a vehicle. Any point selected from an area C, in the vehicle coordinates system B set in the dump truck, where the rear wheels contact a ground is defined as a reference point D. The two GPS receivers are arranged so that a vertical line descends from a line segment PQ, connecting two points P, Q of which positions are calculated by the two GPS receivers, to the reference point D. This makes it possible to accurately estimate an attitude of mining machinery by two position estimation means without stopping operation of the machinery.
摘要:
Methods, systems, and computer program product for location transition determination are described. A mobile device can use location fingerprint data and sensor readings to determine a transition of the mobile device into or out of a portion of a venue by using particle filters. When the mobile device determines that the mobile device is located at a first portion of the venue, e.g., on a given floor, the mobile device can introduce candidate locations, or particles, on a second portion of the venue and candidate locations outside of the venue. If estimated locations at the first portion of the venue do not converge, the mobile device can increase weight of the candidate locations that are outside of the first portion of the venue to detect possible transition to the second portion of the venue or to outside of the venue.
摘要:
A distributed remote sensing system including at least one gateway, at least one sensing device and a communication interface providing radio frequency communication through a shared frequency scheme between each sensing device and one of the at least one gateway and between each sensing device and another of the at least one gateway through a different frequency scheme.
摘要:
The sensor network 30 may include a location capture processing unit 38; and a plurality of sensors 10, 14, 32a - 321 in communication with the location capture processing unit 38. Each sensor 32a - 321 of the plurality of sensors 32a - 32l includes a controller 306 and a RF receiver 100 configured to receive RF signals. The RF receiver 100 is in communication with the controller 306. A localization engine 300 is configured to receive beacon signals transmitted by other sensors 10, 14, and 32a - 321 in the sensor network 30. The localization engine 300 is in communication with the controller 306. The controller 306 of each of the plurality of sensors 32a - 321 is further configured to determine a position of its respective sensor 32a - 32l using either RF receiver 100 or localization engine 300 or both. The plurality of sensors 32a - 32l communicates their position to the location capture processing unit 38.
摘要:
There is provided a method and apparatus for offboard navigation of a 5 robotic device. The method comprising defining a threshold value of a positional accuracy of the robotic device, calculating latency of a network through which the robotic device and a server communicate, the latency of the network being a difference between sending sensor data from the robotic device to the server and receiving processed data corresponding to the 10 sent sensor data by the robotic device from the server, and determining speed of the robotic device based on the threshold value of the positional accuracy of the robotic device and the latency of the network.
摘要:
A method and system for long-life asset tracking is disclosed. One example utilizes an activation module to provide an activation signal to at least a portion of the long-life asset tracker. A position determiner receives the activation signal and determines a location of the long-life asset tracker with a first level of accuracy or a second level of accuracy, wherein the second level of accuracy is more accurate than the first level of accuracy and wherein a default mode of operation is to utilize a radio locator for position determination instead of a navigation satellite system module to extend the life of a power source of the long-life asset tracker. An information provider module to broadcast the location of the long-life asset tracker is also disclosed.
摘要:
An improved wearable locator has an ultra-low power RF transceiver, GPS receiver, cellular network RF transceiver, processor, programmable non-volatile memory, LCD display, accelerometer and rechargeable battery. To ensure that the locator is within a perimeter, it can cooperate with a subordinate unit that includes an ultra-low power RF transceiver, processor, power supply, DC charging output, rechargeable battery, visual, audible and tactile enunciators and pushbutton, and can be plugged into an outlet or be unplugged and be mobile. Other wireless units can be used to define a perimeter.