{
  "$type": "site.standard.document",
  "description": "A combustible gas detection device includes an energization control circuit which performs a control operation of switching the state of energization of a heat generation resistor every time a predetermined period of time elapses such that the heat generation resistor alternately has resistances…",
  "path": "/patents/980806",
  "publishedAt": "2013-12-18T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01N25/18",
    "NGK SPARK PLUG CO [JP]"
  ],
  "textContent": "A combustible gas detection device includes an energization control circuit which performs a control operation of switching the state of energization of a heat generation resistor every time a predetermined period of time elapses such that the heat generation resistor alternately has resistances corresponding to two set temperatures set in advance, a temperature measurement resistor which is disposed on the same substrate on which the heat generation resistor is disposed and the resistance of which changes with the environmental temperature, a gas concentration computation section which calculates the concentration of a combustible gas by using a voltage generated across the heat generation resistor which is detected when electricity is supplied to the heat generation resistor and the environmental temperature based on a voltage change which occurs as a result of a change in the resistance of the temperature measurement resistor. The period of time has a length determined in advance such that a change in the environmental temperature which occurs when the energization control circuit switches the state of energization of the heat generation resistor falls within a range of 0.5°C.",
  "title": "COMBUSTIBLE GAS DETECTION DEVICE"
}