Linkage fault detection device for point type fire detector

Abstract

The invention discloses a linkage fault detection device for a point type fire detector. According to the linkage fault detection device for the point type fire detector, a linkage fault detection circuit comprises a first switch tube, a second switch tube, a voltage-regulator tube, a first optical coupler, a second optical coupler, a first power source and a second power source, wherein the point type fire detector, the primary grade of the first optical coupler, and the base-emitter of the first switch tube are connected in series between the both ends of the first power source; the collector of the secondary grade of the first optical coupler is connected with one signal input end of a core controller; the emitter-base of the second switch tube and the voltage-regulator tube are connected in series between the positive pole of the first power source and the collector of the first switch tube; the collector of the second switch tube is connected with the positive pole of the primary grade of the second optical coupler; the collector of the secondary grade of the second optical coupler is connected with the other signal input end of the core controller. The linkage fault detection device for the point type fire detector provided by the invention can be used for outputting short-circuit and open-circuit fault information of the point type fire detector to the core controller, so that false operation can be prevented.

Description

Technical field [0001] The invention relates to a fault detection device, in particular to a point-type fire detector connection fault detection device. Background technique [0002] Point-type fire detectors are widely used in various fire protection systems. They cooperate with the core controller and play a huge role in various fire protection systems. In 2002, the Ministry of Public Security issued the GA386-2002 standard, requiring that the fire protection system composed of point-type fire detectors and core controllers should have the function of detecting short-circuit or open-circuit faults of point-type fire detectors, and be able to send out corresponding sound and light alarm signals. . However, as far as it is concerned, the existing fire protection system composed of point-type fire detectors and core controllers still does not have this function. This leads to: when the point-type fire detector opens and a fire occurs, the core control The controller judges that ...

AI Technical Summary

Problems solved by technology

However, at present, the fire protection system formed by the point-type fire detectors and the core controller of the prior art still does not have this function, which leads to: when the point-type fire detectors open and a fire occurs, the core control The detector judges that there is no fire; when the point type fire detector is short-circuited and no fire occurs, the core controller judges that a fire has occurred

Obviously, if the fire prevention system composed of the point fire detector and the core controller cannot effectively detect the connection failure of the point fire detector, it is likely to cause immeasurable losses to the user's personal and property safety in the event of a fire

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