Archives - Mobile reporter-type reporting equipment for motorcycle integration
The LGB605-2 is the new version of the LGB605 adapted to the new constraints and wishes of the operators.
The synoptic resumes from LGB605:
The synoptic + of LGB605-2:
We had to face many constraints which we will detail below:
- Vibration constraints: It is obvious that one cannot conceive of mobile equipment integrated on a motorcycle like a lambda device. We first reproduced on a vibrating pot, the vibrations of the engine and we then mixed them with a model reproducing the tremors of the road. We were thus able to eliminate many components and connectors that did not pass the tests, sometimes even after several hours. The selection for fixing the modules among all types of "silent block" was an integral part of the technical study. We now have experience of what to do and what not to do.
- Sealing constraints: As above, apart from the central module, all the controls are exposed to climatic elements. We had to select completely waterproof switches, potentiometers and connectors. In fact, the pilot and the journalist have selection and gain controls which are by definition arranged outside, for quick access.
- Temperature constraints: The central module is housed in a rear bag, but due to sealing constraints it is impossible to ventilate the interior of it properly. We first tested Peltier cells for cooling, but we abandoned them because of the excessive consumption; only the motorcycle battery is a source of energy. We reviewed the copy by selecting components at a very low temperature rise, and after numerous tests in a closed enclosure placed in an oven, the solution was viable. We always had in mind that during the ascent of mountain passes, the temperature can be very high, due on the one hand to the climate, and on the other hand to the very low speed of the vehicles, which does not favor not the natural ventilation of the motorcycle engine. This experience was very enriching and will be able to help us in the future in the design of very energy-efficient equipment.
- EMC immunity constraints: We have chosen to control the gain of the various amplifiers and multiplexers by VCA commands (as on our Broadcast consoles) to minimize the influence of the various high frequency transmissions on the connections. All the active parts are concentrated in the central element, whose accesses have been filtered and shielded to harden as much as possible this equipment at the EMC level.