Abstract:
An occupancy sensor (S) includes: - a sensing probe (101) to detect occupancy (P) of a space monitored by the sensor (S) and produce a corresponding sensing signal, - a comparator (104) including a voltage divider (RA, RB, R1, R2, R3, RC) defining a comparison value (A, B) against which the sensing signal is compared to detect occupancy, and - a voltage sensing means (105) to sense a feed voltage (V battery ) applied to the sensor (S), wherein changes in the feed voltage (V battery ) to the sensor induce a change in the comparison value (A, B). The voltage divider (RA, RB, R1, R2, R3, RC) includes one or more resistors (R1, R2, R3) selectively switcheable (Q1, Q2, Q3) to counter changes induced in said comparison value (A, B) by changes in the feed voltage (Vbattery) • For instance, the voltage divider (RA, RB, R1, R2, R3, RC) may define a comparison window for the sensing signal with a width between an upper threshold (A) and a lower threshold (B), and may include one or more resistors (R1, R2, R3) selectively switcheable (Q1, Q2, Q3) to counter changes in the width of the comparison window (A, B) induced by changes in the feed voltage ( V battery ) •
Abstract:
Die Erfindung betrifft einen Lampensockel (2) für Hochdruckentladungslampe mit einer im Innenraum angeordneten Leiterplatte (30), die mit elektrischen Bauteilen bestückt und mit Leiterbahnen (31) zur elektrischen Kontaktierung der Bauteile versehen ist, wobei mindestens ein elektrischer Kontakt (33) für eine Stromzuführung (16) der Lampe auf der Leiterplatte (30) angeordnet ist, und wobei mindestens eine Trennwand (24, 25) zur elektrischen Isolierung zwischen dem mindestens einen elektrischen Kontakt (33) bzw. der Stromzuführung (16) und den Leiterbahnen (31) der Leiterplatte (30) vorgesehen ist.
Abstract:
A switch assembly, for instance adapted to wall- side installations, for supply arrangements of a load via multiple activation points (for example in the form of "double switching"), comprises a pair of traveler contacts (18, 20) alternatively connectable to a power supply (N), as well as a switch (120) having an output contact (22), alternatively connectable to one or the other of the traveler contacts (18, 20), respectively, on the basis of the current position of switch (120). Switch (120) is an electronic switch which is connected, for example through an electronic circuit (1200) which optionally also performs a driving function (120a) on switch (120), to a respective power line (122). Powering elements (124, 126) are provided, for example in the form of a pair of diodes, controlled electronic switches or diode bridges, which connect said respective power line (122) to the one of traveler contacts (18, 20) which is currently connected to power supply (N), therefore ensuring a steady supply irrespective of the switch position.
Abstract:
A wireless network including a plurality of occupancy sensors (S) to detect occupancy (P) of a space (e.g. a class in a school or a kindergarten) and a device, such as a lighting source (L), actuated as a function of occupied status wireless signals transmitted by the occupancy sensors (S), thus avoiding the need for babies and children to manipulate electrical switches. The sensors (S) transmit e.g. periodically (tRi) an occupied status wireless signal (tTi) as long as the sensor (S) device is detecting occupancy (P), whereby no status signal is transmitted while in the unoccupied state.
Abstract:
Es wird ein Kfz-Scheinwerferelement angegeben, das wenigstens eine Leuchtdiode (20) und wenigstens eine Steuervorrichtung (10) aufweist. Die Steuervorrichtung (10) ist geeignet, ein von einer Messgröße abhängiges Signal zu verarbeiten und einen Strom entsprechend dem Signal in die Leuchtdiode (20) einzuprägen. Steuervorrichtung (10) und Leuchtdiode (20) sind auf einem gemeinsamen Träger (25) angeordnet.