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专利名称：Gas Detection Apparatus发明人：Mitsuharu Kira申请号：US123035申请日：20060714
公开号：US20090324449A1公开日：20091231
专利附图：
摘要：A gas detection apparatus A comprises a signal processing circuit a Wheatstonebridge circuit integrating circuits and a differential amplification circuit a direct currentpower supply circuit a heater voltage application circuit The Wheatstone bridge circuit isconfigured of parallel combination of series circuits: one composed of a catalytic
combustion type gas sensor and a load resistor R1, and the other composed of a resistorR a variable resistor VR and a resistor R The heater voltage application circuit is
configured to generate a pulsed heater voltage by switching a direct current voltage ofthe direct current power supply circuit through a transistor TR1 for applying the pulsedheater voltage to the Wheatstone bridge circuit The integrating circuit integrates avoltage at a connection point between the gas sensor and the load resistor R1. Theintegrating circuit integrates a voltage at a connection point between the variableresistor VR and the resistor R The differential amplification circuit is configured to amplifya differential voltage between the output voltages of the integrating circuits and Thesignal processing circuit is configured to determine a concentration of a flammable gasfrom an output voltage of the differential amplification circuit
申请人：Mitsuharu Kira
地址：Nishinomiya-shi JP
国籍：JP
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