Method of lighting intensity automatic adjustment and device with lighting intensity automatic adjustment
View Patent ↗Method of light intensity automatic regulation wherein after the device is connected to the power system parameters of minimum voltage values are set so that the electronic control system remains in standby mode, and the motion and dusk sensors are in standby mode, and those sensors are synchronized with the electronic control system, then to the electronic control system the value of input signal is entered which is generated by the motion sensor at which the operating cycle of the device is started, and also the value of the output signal generated by the dusk sensor whereupon voltage supplied to the light source increases, up to the maximum value, sources of light display 100% illumination intensity, the illumination time after which voltage supplied to the light source decreases to the minimum value as a result of which the source of light does not illuminate and the device goes into standby mode.
1. A device with light intensity automatic regulation, wherein the device is equipped with a motion sensor (PIR), powered with a power line voltage, designed to detect motion of objects within its range, and then to switch on a load connected to a module (MPO), which constitutes a supply unit of the light source, wherein a signal generated from the motion sensor (PIR) is reinforced and processed by a controller (KPIR), which controls the switching on of a load switch-on module (MPO), wherein the (MPO) module is switched by supplying power to the clamps of a converter comprising:
serially connected filter of conducted constant disturbances (EMI),
a rectifier with a passive reducer of distortions of the current received from the power system (PPFC),
a PWM controller of a MOSFET power transistor together with the MOSFET power transistor and a safety system (PWM-MOS),
an impulse transformer (TR),
a rectifier with an output filter (RC) and
a feedback block stabilizing the output current/output voltage CC/CV,
Wherein:
when the controller (KPIR) based on the signals from the sensor (PIR) detects motion, it triggers the module (MPO) and the converter durably as long as the motion is being detected, wherein
when motion ceases, the controller (KPIR) additionally supports operation of the module (MPO) during strictly programmed time, wherein when the module (MPO) is switched off, cutting off the power from the converter's circuit, the module (KPIR) is powered by the supply unit (ZKPIR) supplying a DC voltage with pre-set parameters to the controller (KPIR), with output allowing for proper control of the module (MPO), wherein
the device comprises a time countdown unit (UPC) connected with the controller (KPIR), that whenever motion is no longer detected by the motion sensor (PIR) sends a signal to a time countdown unit (UOC), to start a countdown, wherein after the lapse of pre-set time, the countdown unit (UOC) sends information about lack of motion to the output current regulator (RPW), which smoothly reduces a current flowing through the light source, due to which the system operates in a limited power consumption mode, wherein
when during the limited power consumption mode the motion sensor (PIR) detects motion, the countdown is reset and an output current regulator (RPW) increases smoothly the current flowing through the light source up to the maximum value, wherein
when during the limited power consumption mode the motion sensor (PIR) detects no motion, and the countdown unit (UOC) counts off the pre-set time, the countdown unit (UOC) sends a signal to the module (MPO), which cuts off voltage from the converter and the remaining units go into standby mode.
2. The device according to claim 1 , wherein the device is equipped with a dusk sensor (CZ) connected directly to the input of the controller (KPIR), wherein the dusk sensor (CZ) is design to detect first intensity of daylight in the ambience within its range, when intensity of daylight is insufficient and it is necessary to switch on artificial light, and then to send information about intensity of daylight to the controller (KPIR) processing a signal by comparing its value with the pre-set value, wherein the controller (KPIR) triggers the module (MPO) and the converter durably until the motion is detected, and the intensity of daylight in the ambience is insufficient, wherein the controller (KPIR) switches of the module (MPO) and the converter durably as long as the intensity of daylight in ambience is too high.