A Highly Sensitive Light-Induced Thermoelastic Spectroscopy Sensor Using a Charge Amplifier to Improve the Signal-to-Noise Ratio
A highly sensitive light-induced thermoelastic spectroscopy (LITES) sensor employing a charge amplifier (CA) is reported for the first time in this invited paper. CA has the merits of high input impedance and strong anti-interference ability. The usually used transimpedance amplifier (TA) and voltag...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-02-01
|
| Series: | Sensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-8220/25/3/946 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850068395153686528 |
|---|---|
| author | Hanxu Ma Shunda Qiao Ying He Yufei Ma |
| author_facet | Hanxu Ma Shunda Qiao Ying He Yufei Ma |
| author_sort | Hanxu Ma |
| collection | DOAJ |
| description | A highly sensitive light-induced thermoelastic spectroscopy (LITES) sensor employing a charge amplifier (CA) is reported for the first time in this invited paper. CA has the merits of high input impedance and strong anti-interference ability. The usually used transimpedance amplifier (TA) and voltage amplifier (VA) were also studied under the same conditions for comparison. A standard commercial quartz tuning fork (QTF) with a resonant frequency of approximately 32.76 kHz was used as the photothermal signal transducer. Methane (CH<sub>4</sub>) was used as the target gas in these sensors for performance verification. Compared to the TA-LITES sensor and VA-LITES sensor, the reported CA-LITES sensor shows improvements of 1.83 times and 5.28 times in the minimum detection limit (MDL), respectively. When compared to the LITES sensor without an amplifier (WA-LITES), the MDL has a 19.96-fold improvement. After further optimizing the gain of the CA, the MDL of the CA-LITES sensor was calculated as 2.42 ppm, which further improved the performance of the MDL by 30.3 times compared to the WA-LITES. Additionally, long-term stability is analyzed using Allan deviation analysis. When the average time of the sensor system is increased to 50 s, the MDL of the CA-LITES sensor system can be improved to 0.58 ppm. |
| format | Article |
| id | doaj-art-81a4e71a5a1d4a2882ec94f2124433a2 |
| institution | DOAJ |
| issn | 1424-8220 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj-art-81a4e71a5a1d4a2882ec94f2124433a22025-08-20T02:48:05ZengMDPI AGSensors1424-82202025-02-0125394610.3390/s25030946A Highly Sensitive Light-Induced Thermoelastic Spectroscopy Sensor Using a Charge Amplifier to Improve the Signal-to-Noise RatioHanxu Ma0Shunda Qiao1Ying He2Yufei Ma3National Key Laboratory of Laser Spatial Information, Harbin Institute of Technology, Harbin 150001, ChinaNational Key Laboratory of Laser Spatial Information, Harbin Institute of Technology, Harbin 150001, ChinaNational Key Laboratory of Laser Spatial Information, Harbin Institute of Technology, Harbin 150001, ChinaNational Key Laboratory of Laser Spatial Information, Harbin Institute of Technology, Harbin 150001, ChinaA highly sensitive light-induced thermoelastic spectroscopy (LITES) sensor employing a charge amplifier (CA) is reported for the first time in this invited paper. CA has the merits of high input impedance and strong anti-interference ability. The usually used transimpedance amplifier (TA) and voltage amplifier (VA) were also studied under the same conditions for comparison. A standard commercial quartz tuning fork (QTF) with a resonant frequency of approximately 32.76 kHz was used as the photothermal signal transducer. Methane (CH<sub>4</sub>) was used as the target gas in these sensors for performance verification. Compared to the TA-LITES sensor and VA-LITES sensor, the reported CA-LITES sensor shows improvements of 1.83 times and 5.28 times in the minimum detection limit (MDL), respectively. When compared to the LITES sensor without an amplifier (WA-LITES), the MDL has a 19.96-fold improvement. After further optimizing the gain of the CA, the MDL of the CA-LITES sensor was calculated as 2.42 ppm, which further improved the performance of the MDL by 30.3 times compared to the WA-LITES. Additionally, long-term stability is analyzed using Allan deviation analysis. When the average time of the sensor system is increased to 50 s, the MDL of the CA-LITES sensor system can be improved to 0.58 ppm.https://www.mdpi.com/1424-8220/25/3/946methane (CH<sub>4</sub>) detectionlight-induced thermoelastic spectroscopy (LITES)quartz tuning fork (QTF)charge amplifierminimum detection limit (MDL) |
| spellingShingle | Hanxu Ma Shunda Qiao Ying He Yufei Ma A Highly Sensitive Light-Induced Thermoelastic Spectroscopy Sensor Using a Charge Amplifier to Improve the Signal-to-Noise Ratio Sensors methane (CH<sub>4</sub>) detection light-induced thermoelastic spectroscopy (LITES) quartz tuning fork (QTF) charge amplifier minimum detection limit (MDL) |
| title | A Highly Sensitive Light-Induced Thermoelastic Spectroscopy Sensor Using a Charge Amplifier to Improve the Signal-to-Noise Ratio |
| title_full | A Highly Sensitive Light-Induced Thermoelastic Spectroscopy Sensor Using a Charge Amplifier to Improve the Signal-to-Noise Ratio |
| title_fullStr | A Highly Sensitive Light-Induced Thermoelastic Spectroscopy Sensor Using a Charge Amplifier to Improve the Signal-to-Noise Ratio |
| title_full_unstemmed | A Highly Sensitive Light-Induced Thermoelastic Spectroscopy Sensor Using a Charge Amplifier to Improve the Signal-to-Noise Ratio |
| title_short | A Highly Sensitive Light-Induced Thermoelastic Spectroscopy Sensor Using a Charge Amplifier to Improve the Signal-to-Noise Ratio |
| title_sort | highly sensitive light induced thermoelastic spectroscopy sensor using a charge amplifier to improve the signal to noise ratio |
| topic | methane (CH<sub>4</sub>) detection light-induced thermoelastic spectroscopy (LITES) quartz tuning fork (QTF) charge amplifier minimum detection limit (MDL) |
| url | https://www.mdpi.com/1424-8220/25/3/946 |
| work_keys_str_mv | AT hanxuma ahighlysensitivelightinducedthermoelasticspectroscopysensorusingachargeamplifiertoimprovethesignaltonoiseratio AT shundaqiao ahighlysensitivelightinducedthermoelasticspectroscopysensorusingachargeamplifiertoimprovethesignaltonoiseratio AT yinghe ahighlysensitivelightinducedthermoelasticspectroscopysensorusingachargeamplifiertoimprovethesignaltonoiseratio AT yufeima ahighlysensitivelightinducedthermoelasticspectroscopysensorusingachargeamplifiertoimprovethesignaltonoiseratio AT hanxuma highlysensitivelightinducedthermoelasticspectroscopysensorusingachargeamplifiertoimprovethesignaltonoiseratio AT shundaqiao highlysensitivelightinducedthermoelasticspectroscopysensorusingachargeamplifiertoimprovethesignaltonoiseratio AT yinghe highlysensitivelightinducedthermoelasticspectroscopysensorusingachargeamplifiertoimprovethesignaltonoiseratio AT yufeima highlysensitivelightinducedthermoelasticspectroscopysensorusingachargeamplifiertoimprovethesignaltonoiseratio |