Flame detecting system
US9939317B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 17, 2017 |
| Grant date | Apr 10, 2018 |
| Priority date | — |
| Expiry date | Nov 17, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2001/4446
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensitivity parameter storing portion stores, as known sensitivity parameters owned by a flame sensor, a reference received light quantity, a reference pulse width, a probability of regular discharge, and probabilities of non-regular discharge in advance. The discharge probability is calculated based on a number drive pulses applied to the flame sensor and a number of discharges determined to have occurred in the flame sensor having received the drive pulses. The calculated discharge probability and the known sensitivity parameters are used to calculate a received light quantity per unit time received by the flame sensor. A pulse width correcting portion is provided to correct the pulse width of the drive pulses generated by an applied voltage generating circuit so that the discharge probability equals a target discharge probability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.