Self-calibration temperature control device and method
US9366583B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2012 |
| Grant date | Jun 14, 2016 |
| Priority date | — |
| Expiry date | Jun 19, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D23/24
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A self-calibration temperature control method and device includes a temperature feedback and control unit, a precise temperature measurement unit, and a temperature calibration unit. The temperature feedback and control unit has a negative temperature coefficient thermistor and an analog feedback control circuit that are connected with a controlled heating element. The temperature calibration unit includes a CPU, a data latch circuit with an input end connected with the CPU through a bus, and a digital potentiometer connected with the temperature feedback and control unit, an output end of the data latch circuit being connected with the digital potentiometer through the bus. The CPU includes a judging unit, a calibration parameter storage module, and a digital potentiometer connection step setting module configured to determine an updated calibration parameter value according to historic calibration parameter data, and further to adjust a step value according to a preset resistance value, thereby adjusting a resistance value of the digital potentiometer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.