Performance Evaluation of an Infrared Thermocouple
The measurement of the leaf temperature of forests or agricultural plants is an important technique for the monitoring of the physiological state of crops. The infrared thermometer is a convenient device due to its fast response and nondestructive measurement technique. Nowadays, a novel infrared th...
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| Format: | Article |
| Language: | English |
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MDPI AG
2010-11-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/10/11/10081/ |
| _version_ | 1811185139415252992 |
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| author | Te-Ching Shen Yu-Kai Weng Chiachung Chen |
| author_facet | Te-Ching Shen Yu-Kai Weng Chiachung Chen |
| author_sort | Te-Ching Shen |
| collection | DOAJ |
| description | The measurement of the leaf temperature of forests or agricultural plants is an important technique for the monitoring of the physiological state of crops. The infrared thermometer is a convenient device due to its fast response and nondestructive measurement technique. Nowadays, a novel infrared thermocouple, developed with the same measurement principle of the infrared thermometer but using a different detector, has been commercialized for non-contact temperature measurement. The performances of two-kinds of infrared thermocouples were evaluated in this study. The standard temperature was maintained by a temperature calibrator and a special black cavity device. The results indicated that both types of infrared thermocouples had good precision. The error distribution ranged from −1.8 °C to 18 °C as the reading values served as the true values. Within the range from 13 °C to 37 °C, the adequate calibration equations were the high-order polynomial equations. Within the narrower range from 20 °C to 35 °C, the adequate equation was a linear equation for one sensor and a two-order polynomial equation for the other sensor. The accuracy of the two kinds of infrared thermocouple was improved by nearly 0.4 °C with the calibration equations. These devices could serve as mobile monitoring tools for in situ and real time routine estimation of leaf temperatures. |
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| format | Article |
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| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T13:24:21Z |
| publishDate | 2010-11-01 |
| publisher | MDPI AG |
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| spelling | doaj.art-2b9a2e14ca9b4716a01b9c0622ec2fbe2022-12-22T04:22:07ZengMDPI AGSensors1424-82202010-11-011011100811009410.3390/s101110081Performance Evaluation of an Infrared ThermocoupleTe-Ching ShenYu-Kai WengChiachung ChenThe measurement of the leaf temperature of forests or agricultural plants is an important technique for the monitoring of the physiological state of crops. The infrared thermometer is a convenient device due to its fast response and nondestructive measurement technique. Nowadays, a novel infrared thermocouple, developed with the same measurement principle of the infrared thermometer but using a different detector, has been commercialized for non-contact temperature measurement. The performances of two-kinds of infrared thermocouples were evaluated in this study. The standard temperature was maintained by a temperature calibrator and a special black cavity device. The results indicated that both types of infrared thermocouples had good precision. The error distribution ranged from −1.8 °C to 18 °C as the reading values served as the true values. Within the range from 13 °C to 37 °C, the adequate calibration equations were the high-order polynomial equations. Within the narrower range from 20 °C to 35 °C, the adequate equation was a linear equation for one sensor and a two-order polynomial equation for the other sensor. The accuracy of the two kinds of infrared thermocouple was improved by nearly 0.4 °C with the calibration equations. These devices could serve as mobile monitoring tools for in situ and real time routine estimation of leaf temperatures.http://www.mdpi.com/1424-8220/10/11/10081/infrared thermocouplethermometercalibration equationleaf temperature |
| spellingShingle | Te-Ching Shen Yu-Kai Weng Chiachung Chen Performance Evaluation of an Infrared Thermocouple Sensors infrared thermocouple thermometer calibration equation leaf temperature |
| title | Performance Evaluation of an Infrared Thermocouple |
| title_full | Performance Evaluation of an Infrared Thermocouple |
| title_fullStr | Performance Evaluation of an Infrared Thermocouple |
| title_full_unstemmed | Performance Evaluation of an Infrared Thermocouple |
| title_short | Performance Evaluation of an Infrared Thermocouple |
| title_sort | performance evaluation of an infrared thermocouple |
| topic | infrared thermocouple thermometer calibration equation leaf temperature |
| url | http://www.mdpi.com/1424-8220/10/11/10081/ |
| work_keys_str_mv | AT techingshen performanceevaluationofaninfraredthermocouple AT yukaiweng performanceevaluationofaninfraredthermocouple AT chiachungchen performanceevaluationofaninfraredthermocouple |