CN102761102A - Protection system for power-cut illuminating device - Google Patents

Abstract

The invention discloses a protection system for a power-cut illuminating device, belonging to the technical field of electronics. The protection system comprises a power source, an illuminating lamp, a power-cut circuit illuminating module and a sensing circuit module, wherein the power-cut circuit illuminating module comprises a step-down rectifier circuit, a filter circuit, a power source input circuit, a power-cut automatic detection circuit and a control circuit; and the sensing circuit module comprises a signal output unit, a power source input discriminator circuit and a sensor and also comprises relays in the current detection circuit and the power-cut circuit illuminating module. The protection system has the advantages that the relays and the detection circuit form a redundant structure to play double protection action on the circuit, the redundant work of frequently replacing elements is avoided, the service life of the control device is prolonged, the cost is lowered, and economic benefits are satisfied.

Description

A kind of protection system of the lighting device that has a power failure

Technical field

The present invention relates to a kind of protection system of device, specifically is a kind of protection system of the lighting device that has a power failure, and belongs to electronic technology field.

Background technology

Electronic circuit all is designed to trend towards mechanism's division of labor, modularity now; Some power failure lighting device is located at the modularity circuit kenel design on two circuit boards with power failure lighting circuit module and sensor circuit module branch; Not only easy to maintenance; And can select to change a wherein circuit module, reach the environmental benefit of saving resource.

When usability is answered circuit module; The action of lighting a lamp of lighting device is not lit a lamp via cell circuit; But light a lamp by the DC power supply behind the power failure lighting circuit module rectifying and wave-filtering; Therefore can be because of the charge capacity of sensor circuit module action consuming cells, can possess enough charge capacities to keep the running of emergency lighting system when guaranteeing to have a power failure, this kind power failure lighting device can be thrown light on by the power failure that people treated coldly for a long time give a brand-new aspect; More make many long-term for light bitter field in one's power the user can obtain timely light with free; But this device is a good protection system not, in case circuit is excessive or short circuit phenomenon occurs and directly can cause the circuit paralysis, and damages lighting device.

Summary of the invention

To the problem that above-mentioned prior art exists, the present invention provides a kind of protection system of the lighting device that has a power failure, and can protect each element in the control device effectively, reduces cost, and meets economic benefit.

To achieve these goals, the technical scheme of the present invention's employing is: a kind of protection system of the lighting device that has a power failure comprises power supply; Illuminating lamp, power failure circuit lighting module, sensor circuit module; Said power failure circuit illumination module comprises step-down rectifying circuit, filter circuit, power supply input circuit; The power failure automatic detecting circuit, control circuit, said sensor circuit module comprises signal output unit; Power supply input judging circuit, transducer also comprises the relay in current detection circuit and the power failure circuit lighting module; Power supply is electrically connected with step-down rectifying circuit; Step-down rectifying circuit is connected with power supply input judging circuit with filter circuit respectively through circuit; Filter circuit, battery charger and stop automatic slowdown monitoring circuit and constitute cell circuit; Power supply input judging circuit is connected to signal output unit through transducer, and signal output unit is electrically connected with control circuit through current detection circuit, and control circuit is electrically connected with illuminating lamp through relay; Relay and current detection circuit constitute redundancy structure; Transducer is human infrared sensor, range sensor and photoinduction element.

The invention has the beneficial effects as follows: relay and testing circuit constitute redundancy structure, and circuit has been played the effect of duplicate protection, avoid often changing the lengthy and jumbled work of element, prolong the useful life of control device, reduce the cost, and meet economic benefit.

Description of drawings

Fig. 1 is an electric theory diagram of the present invention

Embodiment

Below in conjunction with accompanying drawing the present invention is described further.

As shown in Figure 1, a kind of protection system of the lighting device that has a power failure comprises power supply, illuminating lamp; Power failure circuit lighting module, the sensor circuit module, said power failure circuit illumination module comprises step-down rectifying circuit, filter circuit; Power supply input circuit, the power failure automatic detecting circuit, control circuit, said sensor circuit module comprises signal output unit; Power supply input judging circuit, transducer also comprises the relay in current detection circuit and the power failure circuit lighting module; Power supply is electrically connected with step-down rectifying circuit; Step-down rectifying circuit is connected with power supply input judging circuit with filter circuit respectively through circuit; Filter circuit, battery charger and stop automatic slowdown monitoring circuit and constitute cell circuit; Power supply input judging circuit is connected to signal output unit through transducer, and signal output unit is electrically connected with control circuit through current detection circuit, and control circuit is electrically connected with illuminating lamp through relay; Relay and current detection circuit constitute redundancy structure; Transducer is human infrared sensor, range sensor and photoinduction element.

This power failure lighting circuit module, sensor circuit module; Be separately independent on two circuit boards; Composition module circuit kenel; Wherein, the electric power that the running of sensor circuit module is used is to be supplied with by the electric connection of its power supply input judging circuit and the set filter circuit of power failure lighting circuit module; The action of this illuminating lamp is the control circuit control of power failure lighting circuit module; The transducer of sensor circuit module links has a signal output unit, and signal output unit and power failure lighting circuit constitute the output control signal of illuminating lamp through current detection circuit and control circuit electrically connect; This current detection circuit and relay constitute redundancy structure, and electric current at first passes through testing circuit, then through relay; Electric current is delivered to illuminating lamp, produce the action of lighting a lamp, whether the testing circuit at first magnitude of current in the testing circuit exceeds the normal electrical flow; Not in the normal discharge scope, the action of will cutting off the power supply automatically is not if testing circuit detects circuit and exceeds normal range (NR) like the detected magnitude of current; During electric current process relay; Relay can carry out the second time and detect, thus open circuit, the protection The whole control system.

Claims (3)

1. the protection system of the lighting device that has a power failure comprises power supply, illuminating lamp, power failure circuit lighting module; The sensor circuit module, said power failure circuit illumination module comprises step-down rectifying circuit, filter circuit, power supply input circuit; The power failure automatic detecting circuit, control circuit, said sensor circuit module comprises signal output unit; Power supply input judging circuit, transducer is characterized in that also comprising the relay in current detection circuit and the power failure circuit lighting module; Power supply is electrically connected with step-down rectifying circuit; Step-down rectifying circuit is connected with power supply input judging circuit with filter circuit respectively through circuit; Filter circuit, battery charger and stop automatic slowdown monitoring circuit and constitute cell circuit; Power supply input judging circuit is connected to signal output unit through transducer, and signal output unit is electrically connected with control circuit through current detection circuit, and control circuit is electrically connected with illuminating lamp through relay.

2. the protection system of a kind of lighting device that has a power failure according to claim 1 is characterized in that described relay and current detection circuit constitute redundancy structure.

3. the protection system of a kind of lighting device that has a power failure according to claim 1 is characterized in that described transducer is human infrared sensor, range sensor and photoinduction element.

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