Method for increasing reliability in monitoring systems
AssigneeAxis AB
InventorsChristian Dahlqvist, Magnus Larsson
Life of this patent
Estimating the term…
Abstract
An apparatus and a method for controlling a heating device in a motorized camera directing arrangement including a motor device is disclosed. The method comprising measuring a voltage over the motor device, measuring a current conducted at least to the motor device, measuring a temperature relating to the motorized camera directing arrangement, controlling power distributed to the heating device based on the measured temperature and on the measured current, and feeding power to the heating device independent of the measured temperature and the measured current in the event that the measuring of the voltage over the motor device indicates a voltage level higher than a predetermined threshold value.
Claims12
Method for controlling a heating device in a motorized camera directing arrangement including a motor device, the method comprising:
- measuring a voltage over the motor device;
- measuring a current conducted at least to the motor device;
- measuring a temperature relating to the motorized camera directing arrangement;
- controlling power distributed to the heating device based on the measured temperature and on the measured current;
- and
- feeding power to the heating device independent of the measured temperature and the measured current in the event that the measuring of the voltage over the motor device indicates a voltage level higher than a predetermined threshold value.
A motorized camera directing arrangement comprising:
- a motor device, a motor controller, a power supply, a voltage sensor configured to measure a voltage over the motor device, a current sensor configured to measure a current conducted at least to the motor device, a temperature sensor configured to measure a temperature relating to the motorized camera directing arrangement, a heating device, and a heater controller configured to control power distributed to the heating device based on the measured temperature and on the measured current and feed power to the heating device independent of the measured temperature and the measured current in the event that the measuring of the voltage over the motor device indicates a voltage level higher than a predetermined threshold value.
A camera comprising:
- a motorized camera directing arrangement including a motor device, a motor controller, a power supply, a voltage sensor configured to measure a voltage over the motor device, a current sensor configured to measure a current conducted at least to the motor device, a temperature sensor configured to measure a temperature relating to the motorized camera directing arrangement, a heating device, and a heater controller configured to control power distributed to the heating device based on the measured temperature and on the measured current and feed power to the heating device independent of the measured temperature and the measured current in the event that the measuring of the voltage over the motor device indicates a voltage level higher than a predetermined threshold value.
Dependencies are inferred from the claim text.