Wireless terminal with gas leakage detection function, gas leakage detection system using the same, and gas leakage notification method
First Claim
1. A wireless terminal having a sensor, a microcomputer, and a wireless transceiver and provided with a transmitting function to transmit outward gas concentration detected by said sensor through said wireless transceiver, said wireless terminal including:
- a transmission control unit to control a transmission process of said gas concentration through said wireless transceiver over a communication channel, according to the level of said gas concentration detected at the wireless terminal.
1 Assignment
0 Petitions
Accused Products
Abstract
In a hydrogen gas station where a great number of sensors are installed, in case hydrogen leakage occurs, sensors in the vicinity of the leakage location start to transmit warning to an access point all at once. This causes channel capacity saturation and failure to transmit warning to the access point. Nodes and the access point are connected each other by an uplink channel and a downlink channel. The access point detects congested/uncongested status of the uplink channel by using a wireless transmitter module and notifies the nodes of the congested/uncongested status of the channel by means for transmitting onto the downlink channel. Meanwhile, each node controls its transmission operation, according to the hydrogen concentration level detected by its hydrogen sensor and the uplink channel congested/uncongested status notified from the access point. In this way, channel overflow due to access congestion in case of hydrogen leakage can be prevented.
11 Citations
9 Claims
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1. A wireless terminal having a sensor, a microcomputer, and a wireless transceiver and provided with a transmitting function to transmit outward gas concentration detected by said sensor through said wireless transceiver, said wireless terminal including:
a transmission control unit to control a transmission process of said gas concentration through said wireless transceiver over a communication channel, according to the level of said gas concentration detected at the wireless terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9-19. -19. (canceled)
Specification