P1 - TPL640 Thermography Module
- Event
- SENSOR+TEST Conferences 2011
2011-06-07 - 2011-06-09
Nürnberg - Band
- Proceedings IRS² 2011
- Chapter
- IP - Poster Session
- Author(s)
- P. Sachse, A. Günther, O. Sausemuth, S. Biermann, A. Magi - Micro-Hybrid Electronic GmbH, Hermsdorf (Germany)
- Pages
- 247 - 247
- DOI
- 10.5162/irs11/ip1
- ISBN
- 978-3-9810993-9-3
- Price
- free
Abstract
The measurement of hot spots or temperature profiles on movable parts is usually done by expensive IR- cameras. As an inexpensive alternative we want to present the TPL640 Thermography Module. It is a complete device with a 64 pixel line sensor element, intelligent electronic and IR-optic. The TPL640 has a modular design with the following single components:
1. Line array in a high precision package
This 64- pixel line thermopile array detects infrared radiation and converts it to an analog voltage signal. Each pixel with such important parameters like high sensitivity and specific detectivity are top values in comparison to other similar products on the market. The helium leak sealed assembly with lid and soldered Germanium window gives a wide range of sensitivity from 2-16μm. Backfilled with Xenon or vacuum leads to a low crossover and a maximum of sensitivity. The vacuum is controlled by an internal sensor and can be recovered by an internal evacuation system.
In combination with dispersive elements like gratings it is also possible to use this module for spectroscopy! The required accurate position of the line array is realized by the special construction of the bathtub and the automatic production process.
2. Interchangeable objective Actually there are two standard objectives:
1st type: coated 3-5μm: 2.5/32 FOV27°
2nd type: coated 8-12μm: 2.4/60 FOV15°
Both optics have a manual focus from 0.25m – 25m and it is feasible to narrow the band width by an easy changeable 1”- filter at the front of the objective. So it is possible to fit the wavelength to special applications like in steel and glass processes. With the assistance of an additional green pilot line laser (<1mW) it is possible to make an exact adjustment in the fields of application.
3. Electronic unit
The voltage output will be gained with a low noise programmable amplifier. The microcontroller chip is responsible for the processing and conditioning of the analog signals. These signals are used to calculate the absolute object temperature with an internal algorithm. The communication takes place with a serial interface like RS232 and it’s possible to fit other interfaces to customized demands.
The software displays the actual values as absolute temperatures and false colors. It is possible to program threshold values to find out hot spots.