SYSTEM AND METHODS OF INTELLIGENT ON/OFF MODES AND DIMMING FUNCTIONALITY FOR LIGHTING DEVICES

• US 20110215724A1
• Filed: 10/05/2010
• Published: 09/08/2011
• Est. Priority Date: 03/03/2010
• Status: Abandoned Application

• Current Assignee: Jyotirmoy Chakravarty, Sarosij Sengupta
• Original Assignee: Jyotirmoy Chakravarty, Sarosij Sengupta
• Inventors: Sengupta, Sarosij, Chakravarty, Jyotirmoy
• Application Number:
  US12/898,014
• Publication Number:
  US 20110215724A1
• Time in Patent Office: Days
• US Class Current: 315/152
• CPC Class Codes: H05B 47/165 following a pre-assigned programmed sequence; Logic control [LC]
• CPC Class Codes: Y02B 20/40 Control techniques providing energy savings, e.g. smart controller or presence detection

Abstract

The present invention provides a system for intelligently controlling the ON/OFF modes and dimming functionality for lighting devices with built in redundancy. The system comprises: a plurality of sensor banks having a plurality of sensors capable of operating over exclusive ambient light levels and creating redundancy; and a micro-controller configured to add dimming functionality and automatically detecting faulty sensing situations and sudden change in the light level, wherein computing logics are adapted with the help of a high end micro-controller to increase sensitivity of the system.

Claims

1. A system for intelligently controlling the ON/OFF modes and dimming functionality for lighting devices with built in redundancy, comprising:

at least a sensor bank having a plurality of sensors capable of operating over exclusive ambient light levels and creating redundancy;

at least a micro-controller configured to add dimming functionality and automatically detecting faulty sensing situations and sudden change in the light level;

a polling module capable of detecting the conditions of the sensors and building redundancy; and

a sampling module capable of controlling light output based on detected ambient light conditions and ambiguous false detections conditions,

wherein a time based dimming module is capable of working as disaster recovery in case of failure of all sensors, wherein the micro-controller uses the sampling module to average out the results captured over a period of approximate 15-30 seconds to remove all possibilities of false reading captured due to sudden light level changes.

2. The system of claim 1, wherein the micro-controller and the polling module are capable of allowing powering up of the lights partially to specific percentage levels based on the actual demand of the prevailing ambient light conditions.

3. The system of claim 1, wherein a first DC voltage outputs (V1) is calibrated using suitable sense resistor values to operate from greater than 600 lux condition to 350 lux condition, wherein a second DC voltage outputs (V2) is calibrated to operate from 350 lux to less than 10 lux condition, wherein the same input DC voltage is used to switch ON and OFF the illuminating equipment based on ambient light.

4. The system of claim 1, wherein a high light level detection sensor is functional for conditions including any one of direct sunlight, full daylight and overcast day, wherein a low light level detection sensor is functional for conditions including any one of dark day, very dark day, twilight and deep twilight or no light.

5. The system of claim 1, wherein the micro-controller with the help of the polling module is capable of sensing inputs of sensor banks and averages out the values to determine the required duty cycle of the pulse width modulated specific light output of the illuminating equipment.

6. The system of claim 1, wherein in case of failure of one sensor bank, the micro-controller is capable of detecting the defective sensor bank and accordingly discarding ambiguous situations that might arise due to the failure.

7. The system of claim 1, wherein the micro-controller have a non-volatile program memory which is loaded with an algorithm, used to monitor, process, compute, and control the automated ON/OFF and dimming functionality in a intelligent manner.

8. The system of claim 1, wherein an additional backup/redundancy is provided as a result of the ON/OFF and dimming pattern which gets stored in the micro-controller memory from prior operations, wherein the stored result of the ON/OFF and dimming pattern automatically retrieved in the event all sensors are blocked or non-operational and the micro-controller starts operating the illuminating equipment in the same manner so that by the time the sensor is replaced the light is still functional.

9. The system of claim 1, wherein the sensors are connected to at least an analog input of the micro-controller that is programmed to generate a digital pulse width modulated signal with varying duty cycle based on a voltage levels received on the analog pins.

10. The system of claim 1, wherein the micro-controller works on a polling module which is capable of constantly monitoring the voltages on analog pins of the micro-controller.

11. The system of claim 1, wherein when the micro-controller senses a change in the voltage at the analog pins the micro-controller compare the change in the voltage with a duty cycle versus voltage table is pre-programmed in an algorithm fed into the micro-controller, wherein based on the duty cycle value the micro-controller puts out a pulse width modulated signal from one of it'"'"'s digital pins with the desired duty cycle.

12. The system of claim 1, wherein multiple sensors and auxiliary resistances are adapted to configure the sensor bank.

13. A method for intelligently controlling the ON/OFF modes and dimming functionality for lighting devices with built in redundancy, comprising the steps of:

initializing a data memory and digital and analog pins;

running polling module;

initializing and switching to time based dimming in case the sensor bank is not working; and

running a sampling module if the sensor bank is working,

wherein the polling module is capable of detecting the conditions of the sensors and building redundancy, wherein the sampling module is capable of controlling light output based on detected ambient light conditions and ambiguous false detections conditions, wherein the time based module is adapted to used as disaster recovery in case of failure of the sensors.

14. The method of claim 13, wherein the polling module comprising the steps of:

reading analog voltage signals coming from sensor banks and converting the analog voltage signals to digital voltage signals;

checking digital voltage;

checking sensor bank failure detection;

marking the failure sensor bank for not reading failed sensor bank further;

reading the working sensor bank in order to built the redundancy;

switching to time based module if both sensor banks are failed;

averaging out the digital voltages read from the sensor banks;

storing the data in internal memory of the micro-controller;

checking whether desired samples are collected over 15-20 seconds or not;

terminating the polling module in case desired samples are collected; and

starting a sampling module for controlling light output based on detected ambient light conditions and also removing ambiguous false condition detections.

15. The method of claim 13, wherein the sampling module further comprising the steps of:

studying all the data samples collected and stored in an internal memory of the micro-controller during the polling module to check consistent ambient light change; and

setting an actual duty cycle by referring to a voltage versus duty cycle table stored in the non-volatile memory of the micro-controller.

16. A system for intelligently controlling the ON/OFF modes and dimming functionality for lighting devices with built in redundancy, comprising:

a plurality of sensor banks having a plurality of sensors capable of operating over exclusive ambient light levels and creating redundancy; and

a micro-controller configured to add dimming functionality and automatically detecting faulty sensing situations and sudden change in the light level,

wherein the system is embedded with computing logics with the help of a high end micro-controller to increase sensitivity of the system, wherein the system is capable of generating varying DC voltages depending upon the prevailing ambient light situation.

17. The system of claim 16, wherein the computing logics includes any one of a polling module, sampling module, time based dimming module or any combination thereof.

18. The system of claim 16, wherein the dimming functionality controls a light output of the illuminating equipments based on the amount of instantaneous ambient light level.

19. The system of claim 16, wherein the micro-controller is programmed for different percentage dimming versus ambient light relationship depending upon specific light level requirements, wherein the dimming functionality controls a light output of the illuminating equipments based on the amount of instantaneous ambient light level.

20. The system of claim 16, wherein accuracy of a control mechanism is increased by using the readings of multiple sensors.