摘要:
A notification appliance circuit 12 includes at least one notification appliance 10. The at least one notification appliance 10 includes a charge controller 26 including a single stage current controller 28, the charge controller 26 being configured to output a charge current 34, an energy store 24 configured to receive the charge current 34, and provide a discharge current 36, and a notification component 14 configured to receive the discharge current 36 and emit a notification 22.
摘要:
The present invention proposes a strobe notification appliance that uses LED elements as light-emitting elements. A drive circuit (430) of such a strobe notification appliance can supply a working current (I_work) for an LED circuit (240) at an alarming stage under the control of a control circuit (450) and supply a detection current (I_detect) for the LED circuit (240) at a detection stage, wherein the detection current (I_detect) is lower than the working current (I_work) and can cause light energy produced by the LED elements In the LED circuit (240) at the detection stage to be far lower than alarming light energy produced at the alarming stage or even cause the LED elements not to emit light at the detection stage; and the control circuit (450) can determine, by sampling an overall voltage drop (V_LED) of the LED circuit at the detection stage, whether the LED circuit (240) works normally.
摘要:
The present invention proposes a visual notification device in a fire-fighting system, comprising: an input end (210), a booster circuit (230, 830), an energy storage element (240), at least one flash element (260), and a flash control circuit (450), for causing energy in the energy storage element (240) to be applied to the at least one flash element (260) to make it flash; wherein at least one of the booster circuit, the at least one flash element and the flash control circuit is designed such that a residual voltage (Vr) across the energy storage element in each flash operation is greater than or equal to the input voltage (Vin). Using the notification device proposed by the present invention enables the occurrence of a repetitive inrush current to be suppressed effectively without the addition of a current-limiting circuit.
摘要:
A visual alarm device for a bus connected alarm system, comprising: at least one visual alarm element for emitting a visual alarm signal; the visual alarm signal having a minimum luminous flux level within one of a plurality of predetermined alarm regions of a given dimension, at least one controller (27) for controlling the visual alarm element so as to emit the visual alarm signal in response to an electric alarm signal supplied through a bus (23); a storage unit storing at least one each of operation setting values for the controller (27) to control the visual alarm element; each each of operation setting values being predefined depending on the dimensions of the predetermined alarm region.
摘要:
A notification appliance circuit (NAC) includes notification devices having a high capacity rechargeable energy storage device such as a supercapacitor and a strobe circuit. The supercapacitor can provide energy to produce flashes over an extended time period without fully discharging. The notification devices can also make use of the fallback power strategy in which the strobe circuit operates with reduced intensity while the supercapacitor is being recharged.