Polyconductor beam power sensor
| Autor: | M. Hamid |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Wheatstone bridge
Materials science business.industry Electrical engineering Excitation temperature Power (physics) law.invention Compensation (engineering) Terminal (electronics) Orders of magnitude (specific energy) law Optoelectronics Electrical and Electronic Engineering business Microwave Beam (structure) |
| Zdroj: | International Journal of Electronics. 71:363-381 |
| ISSN: | 1362-3060 0020-7217 |
| Popis: | The design is presented of a sensor circuit for the thermal detection and power measurement of incident microwave and laser beams due to accidental or targeted exposure. In this sensor, a polyconductor device acts as a microwave or optical beam absorber. The basic feature of the polyconductor is that its terminal resistance in the transition region can vary by many orders of magnitude with small changes in excitation temperature, regardless of frequency. Thus the heating effect of the incident wave changes the terminal resistance which is converted into a sensitive imbalance of a Wheatstone bridge circuit with appropriate display. This circuit is significantly improved with the aid of an ambient temperature compensation section and a feedback loop to maintain operation in the most sensitive region of the polyconductor characteristic. The sensor has proved to be adequate for a wide range of fluctuations in ambient temperature and incident power levels. Also, since the polyconductor film does not a... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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