Experimental Characterization of a Thermopile with Aluminum-n-type Polysilicon Junctions as a Base for Multi-directional Flow Sensor Implemented in a Silicon Chip
A multi-directional flow sensor has been realized. The essential part of the considered sensor is a thermopile configuration, which enables the measurement of the flow speed and the flow direction. The thermopile is a series arrangement of eight thermocouples. A thermocouple converts a difference in...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
ITB Journal Publisher
2007-11-01
|
| Series: | ITB Journal of Engineering Science |
| Subjects: | |
| Online Access: | http://journal.itb.ac.id/download.php?file=B07051.pdf&id=202&up=7 |
| _version_ | 1819144689230544896 |
|---|---|
| author | Muh. Thamrin Ayub Subandi Irman Idris Adang Suwandi Ahmad |
| author_facet | Muh. Thamrin Ayub Subandi Irman Idris Adang Suwandi Ahmad |
| author_sort | Muh. Thamrin |
| collection | DOAJ |
| description | A multi-directional flow sensor has been realized. The essential part of the considered sensor is a thermopile configuration, which enables the measurement of the flow speed and the flow direction. The thermopile is a series arrangement of eight thermocouples. A thermocouple converts a difference in temperature into an electrical signal, by means of the Seebeck effect. The thermocouples are made of aluminum-N-type polysilicon junctions. The incoming flow is heated and the degree of heat transfer by convection to the flow, depends on the speed of the flow; the faster the flow the smaller the heat transfer, which leads to a smaller (Seebeck) output voltage of the thermopiles. After signal conditioning - i.e., filtering and amplification by means of an amplification system - the electrical output signals of the thermopiles are further signal-processed by applying analog-to-digital signal conversion, so that finally the flow speed and flow direction can be properly displayed on a computer screen. The measured values of the thermopower were in the range of: 0.433 mV/K to 0.6754 mV/K, which are in good agreement with the values found in the literature: 0.5 to 0.7 mV/K. In addition it was found that the flow speed U is proportional to the reciprocal value of the square root of the output voltage of the outgoing thermopile. |
| first_indexed | 2024-12-22T12:46:07Z |
| format | Article |
| id | doaj.art-21b5a936bf504087a9a7fef3f2cc098a |
| institution | Directory Open Access Journal |
| issn | 1978-3051 |
| language | English |
| last_indexed | 2024-12-22T12:46:07Z |
| publishDate | 2007-11-01 |
| publisher | ITB Journal Publisher |
| record_format | Article |
| series | ITB Journal of Engineering Science |
| spelling | doaj.art-21b5a936bf504087a9a7fef3f2cc098a2022-12-21T18:25:19ZengITB Journal PublisherITB Journal of Engineering Science1978-30512007-11-0139298108Experimental Characterization of a Thermopile with Aluminum-n-type Polysilicon Junctions as a Base for Multi-directional Flow Sensor Implemented in a Silicon ChipMuh. ThamrinAyub SubandiIrman IdrisAdang Suwandi AhmadA multi-directional flow sensor has been realized. The essential part of the considered sensor is a thermopile configuration, which enables the measurement of the flow speed and the flow direction. The thermopile is a series arrangement of eight thermocouples. A thermocouple converts a difference in temperature into an electrical signal, by means of the Seebeck effect. The thermocouples are made of aluminum-N-type polysilicon junctions. The incoming flow is heated and the degree of heat transfer by convection to the flow, depends on the speed of the flow; the faster the flow the smaller the heat transfer, which leads to a smaller (Seebeck) output voltage of the thermopiles. After signal conditioning - i.e., filtering and amplification by means of an amplification system - the electrical output signals of the thermopiles are further signal-processed by applying analog-to-digital signal conversion, so that finally the flow speed and flow direction can be properly displayed on a computer screen. The measured values of the thermopower were in the range of: 0.433 mV/K to 0.6754 mV/K, which are in good agreement with the values found in the literature: 0.5 to 0.7 mV/K. In addition it was found that the flow speed U is proportional to the reciprocal value of the square root of the output voltage of the outgoing thermopile.http://journal.itb.ac.id/download.php?file=B07051.pdf&id=202&up=7flow sensorthermopileSeebeck effect |
| spellingShingle | Muh. Thamrin Ayub Subandi Irman Idris Adang Suwandi Ahmad Experimental Characterization of a Thermopile with Aluminum-n-type Polysilicon Junctions as a Base for Multi-directional Flow Sensor Implemented in a Silicon Chip ITB Journal of Engineering Science flow sensor thermopile Seebeck effect |
| title | Experimental Characterization of a Thermopile with Aluminum-n-type Polysilicon Junctions as a Base for Multi-directional Flow Sensor Implemented in a Silicon Chip |
| title_full | Experimental Characterization of a Thermopile with Aluminum-n-type Polysilicon Junctions as a Base for Multi-directional Flow Sensor Implemented in a Silicon Chip |
| title_fullStr | Experimental Characterization of a Thermopile with Aluminum-n-type Polysilicon Junctions as a Base for Multi-directional Flow Sensor Implemented in a Silicon Chip |
| title_full_unstemmed | Experimental Characterization of a Thermopile with Aluminum-n-type Polysilicon Junctions as a Base for Multi-directional Flow Sensor Implemented in a Silicon Chip |
| title_short | Experimental Characterization of a Thermopile with Aluminum-n-type Polysilicon Junctions as a Base for Multi-directional Flow Sensor Implemented in a Silicon Chip |
| title_sort | experimental characterization of a thermopile with aluminum n type polysilicon junctions as a base for multi directional flow sensor implemented in a silicon chip |
| topic | flow sensor thermopile Seebeck effect |
| url | http://journal.itb.ac.id/download.php?file=B07051.pdf&id=202&up=7 |
| work_keys_str_mv | AT muhthamrin experimentalcharacterizationofathermopilewithaluminumntypepolysiliconjunctionsasabaseformultidirectionalflowsensorimplementedinasiliconchip AT ayubsubandi experimentalcharacterizationofathermopilewithaluminumntypepolysiliconjunctionsasabaseformultidirectionalflowsensorimplementedinasiliconchip AT irmanidris experimentalcharacterizationofathermopilewithaluminumntypepolysiliconjunctionsasabaseformultidirectionalflowsensorimplementedinasiliconchip AT adangsuwandiahmad experimentalcharacterizationofathermopilewithaluminumntypepolysiliconjunctionsasabaseformultidirectionalflowsensorimplementedinasiliconchip |