In the last thirty years, projects took me to various technology fields and it developed my expertise in combining them smartly, so the solutions I found were solid theoretically and practical to implement.
Bellow is part of my activities – things from the far past are described briefly:
Current company –
I am a free-lance consultant in MCS from 2001 till now. In years 2001-2004 it was modifying their software with few hours a month.
From 2004 my activities were more like a system engineer, dealing with the architecture of Current company' advanced model. By learning MCS future medical market segments, I designed a concept for a family of product with the same base of hardware and software which gives the flexibility to adapt to changing market needs.
From 2006 till now I am R&D manager In Current company .
The design was of a double processors system – DSP and MPU – controlling pneumatic system and monitoring various types of sensors. The DSP responsible to monitor and activate the pump and solenoids and analyzing weak signals measured from the patient body. The MPU responsible to control the treatment procedure, check safety problems, charge and discharge of batteries, user interface and external communication.
The double processors system was needed to double check any source of risks or mistreatment to the patient or safety problems, but selecting a DSP as the second processor was to implement smart control of the pump and solenoids and producing the optimum – from medical point of view – of pressure/time curve, synchronized to patient's body signals.
The DSP is responsible to monitor efficiency of aging pump and compensate it, to enlarge its lifetime by applying the ideal acceleration in stop and start, adapting speed to the load (pressure) to more efficient rotary vanes pump operation.
It measures continuously the back-emf, the segment and gaps' current, pressure produced and temperature of the pump, and reacts in friction of second by changing pump voltage(PWM controlled step-down) or pump direction (by H-bridges).
The DSP monitors the brush segments (in brushed motor) current can determine the RPM vs. flow, avoid gap spikes, apply changing voltage (by mean of PWM controlled step-down) per segment to supply the right amount of power to give the ideal torque. Measuring the back-emf of the motor used to determine load too.
The DSP that was selected and the hardware implemented are good to BLDC pump too – with minor hardware changes.
The DSP is responsible of smart activation of the solenoids controlling the plunger movement and minimize power consumption (and heat).An overall power management to avoid peak current consumption by synchronizing the PWM phases and frequencies.
In Current company after entering to production of this advanced model an ATE to test them was designed.
SO I CAN DO IT
