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Patent Searching and Data


Title:
SELF-CALIBRATION TEMPERATURE CONTROL DEVICE AND METHOD
Document Type and Number:
WIPO Patent Application WO/2013/185367
Kind Code:
A1
Abstract:
The present invention provides a self-calibration temperature control method and device. The present invention comprises: a temperature feedback and control unit, a precise temperature measurement unit, and a temperature calibration unit. The temperature feedback and control unit comprises: a negative temperature coefficient thermistor and an analog feedback control circuit that are connected with a controlled heating element. The temperature calibration unit comprises: 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 comprises: a judging unit, a calibration parameter storage module, and a digital potentiometer connection step-length setting module, the digital potentiometer connection step-length setting module being configured to determine an updated calibration parameter value according to historic calibration parameter data, and further adjust a step-length value according to a preset resistance value, thereby adjusting a resistance value of the digital potentiometer. The device is high-efficient and reliable, and has high accuracy.

Inventors:
XIANG XIAOFEI (CN)
ZHAO ZHIXIANG (CN)
CHAI SHAOGUO (CN)
Application Number:
PCT/CN2012/077147
Publication Date:
December 19, 2013
Filing Date:
June 19, 2012
Export Citation:
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Assignee:
EDAN INSTRUMENTS INC (CN)
XIANG XIAOFEI (CN)
ZHAO ZHIXIANG (CN)
CHAI SHAOGUO (CN)
International Classes:
G01K15/00
Domestic Patent References:
WO2011129689A12011-10-20
WO2012031051A12012-03-08
Foreign References:
CN1194390A1998-09-30
CN2741027Y2005-11-16
CN102478439A2012-05-30
CN101846558A2010-09-29
Other References:
See also references of EP 2863196A4
None
Attorney, Agent or Firm:
SHENZHEN GANGWAN INTELLECTUAL PROPERTY AGENT CO., LTD (CN)
深圳市港湾知识产权代理有限公司 (CN)
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