Thermal convection based accelerometer and heating control method therefor
US11293938B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 2020 |
| Grant date | Apr 5, 2022 |
| Priority date | — |
| Expiry date | Oct 27, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B1/0297
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Thermal convection based accelerometers and heating control methods therefor are described. The heating control method includes: sensing a temperature in the enclosed cavity and generating a temperature voltage signal; amplifying the temperature voltage signal to obtain an amplified temperature voltage signal; calculating a voltage difference between the amplified temperature voltage signal and a reference voltage signal; converting the voltage difference into a digital sequence by using a modulator; obtaining a heating power adjustment factor representing the voltage difference based on the digital sequence; obtaining a heating power control parameter based on the heating power adjustment factor and an initial heating power factor; converting the heating power control parameter into a switch control signal; and turning on or off a heating control switch coupling with a heating resistor for heating the enclosed cavity in series according to the switch control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.