Wireless Relay Device Collision Prevention in Dosimeter Networks
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Solution Overview
Problem
Conventional exposure management systems in radiation management regions, such as nuclear power plants, face inefficiencies in collecting exposure dose data from multiple dosimeters due to long connection times and inability to quickly gather data from a large number of devices.
Innovation Solution
The system employs a plurality of dosimeters and wireless relay devices that use distinct communication channels, with each dosimeter generating multiple response times for data transmission, allowing for retransmission in case of collisions and acknowledgment-based stoppage of subsequent transmissions to prevent collisions and enhance data collection efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If circuit connection is performed by dialing each time the monitoring device and the portable dosimeter communicate, then the system can establish communication between devices, but it takes long time to be connected to the public line
Solution Approach 1:
The patent assigns dedicated communication channels to wireless relay devices in advance, so that when data collection is needed, the channel is already established and ready for use. This eliminates the time-consuming dialing process that occurs in conventional systems, as the communication path is pre-configured rather than created on-demand.
2Quantity of substance
If multiple dosimeters transmit data simultaneously using the same communication channel, then all dosimeters can be monitored, but collision of responses occurs and data collection efficiency decreases
Solution Approach 1:
The patent divides the communication system into multiple segments by assigning different communication channels to different wireless relay devices. Each relay device operates on its own dedicated channel, which segments the overall communication traffic and eliminates collisions that would occur if all dosimeters transmitted on the same channel simultaneously.
Solution Approach 2:
The patent adds a spatial dimension to the communication architecture by deploying multiple wireless relay devices at different locations, each handling dosimeters in its coverage area. This dimensional expansion allows parallel data collection from multiple dosimeters without interference, as each relay device operates independently on its own channel.
3Device complexity
If a single communication channel is used for all wireless relay devices, then the system structure is simple, but exposure dose data cannot be collected quickly from a large number of dosimeters
Solution Approach 1:
The patent makes each wireless relay device universally capable of independent operation with its own dedicated communication channel. Each relay device can independently collect data from multiple dosimeters in its coverage area, and the system as a whole achieves high-speed data collection by aggregating the capabilities of multiple such universal relay devices working in parallel.
Data Source
AI summary
An exposure management system includes dosimeters, wireless relay devices that wirelessly communicate with the dosimeters, and a monitoring device. The dosimeters are carried by workers for measuring exposure doses in a radiation management facility. The wireless relay devices transmit a monitor indication message that requests the dosimeters to provide respective responses that include information of measured exposure doses. The wireless relay devices receive the responses from the dosimeters by using allocated respective communication channels that are different from each other. Each dosimeter receives the monitoring indication message and generates a designated number of response times for providing a response to the monitor indication message, and determines a communication channel corresponding to each of the generated response times. The monitoring device is connected to the wireless relay devices for monitoring an exposure state of each of the workers through the wireless relay devices and dosimeters.