Hello.
When reading the different topics here speaking about the fire brigade camera Argus 3 and especially studying the documentation provided by Bill here:
http://www.fire-tics.co.uk/A3.htmhttp://www.fire-tics.co.uk/forum/viewtopic.php?f=6&t=41for instance...
I was asking myself the following:
I understood that the function of the embedded Peltier Module is to allow the BST sensor to be kept at a normal and optimal running temperature in case of excessive environmental temperature increasing, the sensor to be submitted to such "over heating"....
The optimal temperature (from memory, please correct me in case of...) would be around 30°C, is it correct?
Therefore, i imagine that in case of overheating of the sensor, the Peltier module enters into action and cool down said sensor till the required normal running temperature is reached.... with the application of a conventional feedback loop control, i guess?
But during this cooling process, what is difficult for me to understand is how the Peltier module would expel the extracted calories from the sensor... indeed, generally speaking, Peltier module needs to be equipped with a quite well sized heatsink (huge radiator with cooling fan, or liquid cooling used in heat exchanger, whatever...).
Indeed, when the heatsink is undersized, the Peltier module runs easily badly into a thermal runaway mode and gets globally warmer and warmer without cold face and hot face anymore...
But when i observe the inside of a torn-down Argus 3, i do not see any heatsink or any kind of embedded heat exchanger (or is it one of the rear flat aluminium flange fixed on the main PCB/motherboard unit....?)
http://www.fire-tics.co.uk/project2/A3_repair1.htmSo shortly worded:
How the Peltier module from the Argus 3 can work properly and ensure properly its cooling function in excessive hot environment (fire brigade working environment, for instance), without falling in an undesired thermal runaway mode?
As usual, and in advance, thank you for your explanations.
Best regards.
Stéphane