Wireless Gas Detection Sensor
A gas sensing device ( 10 ) ( 100 ) and method are provided. The battery-powered wireless gas sensing device ( 10 ) ( 100 ) has low power consumption components and power-saving functions. The gas sensing device ( 10 ) ( 100 ) has extended battery life and run times so as not to require battery replacement or recharging prior to expiration of the standard gas sensor calibration cycle.
1 . A gas sensing device having high power consumption active modes, a low power consumption passive mode and an off mode, the gas sensing device comprising:
a gas sensor module comprising a gas sensing element, the gas sensing element continuously monitoring at least one of the presence and concentration of at least one gas in a gaseous atmosphere during the active modes and the passive mode, and continuously generating corresponding gas concentration information;
a wireless communicator;
a processor operably connected to the gas sensor module and the wireless communicator, the processor configured to:
actively communicate during the active modes;
be inactive when in the low power consumption passive mode; and
retrieve the gas concentration information from the gas sensor module and to transmit the information to the wireless communicator;
a power supply electrically connected to each of the gas sensor module, the processor and the wireless communicator; and
the wireless communicator being configured to receive the gas concentration information from the processor and to wirelessly transmit the information to at least one information receiver.
2 . The gas sensing device of claim 1 , wherein the gas concentration information is real-time gas concentration information.
3 . The gas sensing device of claim 1 , wherein the gas sensing element is a nondispersive infrared gas sensor.
4 . The gas sensing device of claim 3 , wherein the gas sensing device has a maximum average power consumption of about 17 mWh.
5 . The gas sensing device of claim 4 , wherein the power supply is a battery having a capacity of at least 342 watt-hours and a run time of at least 24 months.
6 . The gas sensing device of claim 1 , wherein the gas sensing element is an electrochemical gas sensor.
7 . The gas sensing device of claim 6 , wherein the gas sensing device has a maximum average power consumption of about 11 mWh.
8 . The gas sensing device of claim 7 , wherein the power supply is a battery having a capacity of at least 342 watt-hours and a run time of at least 36 months.
9 . The gas sensing device of claim 1 , wherein the wireless communicator is a radio frequency module that wirelessly communicates with at least one external device selected from the group consisting of Wi-Fi/wireless; FM radio links; wireless personal area network, WPAN, protocols; Microsoft™ DirectBand network; Wibree™; WirelessHART; Ultra-wideband, UWB; ISA-SP100 standards; Zigbee®; IEEE 802.15.4-based protocols; IEEE 802.11 family of WLAN protocols; and RFID signaling protocols.
10 . The gas sensing device of claim 1 , further comprising a display electrically connected to the processor, wherein the display periodically displays the gas concentration information and displays information communicated from the processor when the processor is activated by a user input command.
11 . The gas sensing device of claim 1 , further comprising at least one integrated user input module for entering user input commands.
12 . The gas sensing device of claim 1 , wherein the processor is configured to execute firmware that is programmed to perform a plurality of functions, the functions including:
checking gas concentration information generated by the gas sensing element;
communicating gas concentration information to the wireless communicator;
checking a status of the power supply;
responding to user input commands entered through an integrated user input module;
responding to external requests for information that are communicated to the device through the wireless communicator; and
directing the display of information related to any of said functions on a display.
13 . The gas sensing device of claim 12 , wherein the processor executes each of the functions once per second.
14 . A method for continuously monitoring at least one of the presence and concentration of at least one gas in a gaseous atmosphere, the method comprising the steps of:
providing a gas sensing device configured for operation in high power consumption active modes, a low power consumption passive mode and an off mode, the device having:
a gas sensor module comprising a gas sensing element;
a processor operably connected to the gas sensor module;
a wireless communicator operably connected to the processor; and
a power supply electrically connected to each of the gas sensor module, the processor and the wireless communicator;
the processor configured to:
actively communicate during the active modes; and
be inactive when in the low power consumption passive mode;
continuously monitoring at least one of the presence and concentration of the at least one gas in a gaseous atmosphere with the gas sensing element when the device is in the active mode or the passive mode;
actively checking gas concentration information generated by the gas sensing element; and
actively communicating the gas concentration information from the processor to the wireless communicator.
15 . The method of claim 14 , wherein the gas sensing device communicates gas concentration information in real-time, and wherein the processor executes at least one of the continuously monitoring, actively checking and actively communicating steps once per second.
16 . The method of claim 14 , wherein the gas sensing element is a nondispersive infrared gas sensor.
17 . The method of claim 16 , wherein the gas sensing device consumes a maximum average power consumption of about 17 mWh.
18 . The method of claim 14 , wherein the gas sensing element is an electrochemical gas sensor.
19 . The method of claim 18 , wherein the gas sensing device consumes a maximum average power of about 11 mWh.
20 . The method of claim 14 , wherein the wireless communicator is a radio frequency module that wirelessly communicates with at least one external device up to once per second.
21 . The method of claim 14 , further comprising wirelessly signaling an external alarm generating apparatus to produce an alarm.