Claims
- 1. In an apparatus for detecting environmental disturbances such as the occurrence of a fire, a gas leak or the like comprising a central processing unit and a plurality of terminal detectors, wherein an identification code is assigned to each of the detectors and the central processing unit sequentially calls the detectors in rotation requesting them to transmit thereto the data collected on a specific environmental condition such as smoke concentration, gas concentration, temperature or the like,
- the improved apparatus provided with
- a memory connected to the central processing unit in which memory data on the detected condition which have been transmitted from the detectors over a limited period of time can be stored for each detector, and
- a display unit which can display the data for the limited period stored in the memory,
- whereby the central processing unit compares the fresh data transmitted from each detector with a single fixed reference level and causes the display unit to display the data which have been transmitted from said detector and have been stored in the memory in a past limited period of time when said fresh data exceeds the reference level.
- 2. An apparatus for detecting environmental disturbances as claimed in claim 1, which can display the data stored in a past limited period of time for the detectors other than the detector which transmitted the signal exceeding the reference level.
- 3. An apparatus for detecting environmental disturbances as claimed in claim 1, which can store and display the data which have been collected by a detector after said detector transmitted a signal exceeding the reference level.
- 4. An apparatus for detecting environmental disturbances as claimed in any one of claims 1 through 3, which can issue a provisional alarm when a signal exceeding the reference level is received by the CPU.
- 5. An apparatus for detecting environmental disturbances as claimed in any one of claims 1 through 3, which can set a reference level which is lower than the normal reference level for the disturbance to be detected.
- 6. An apparatus for detecting environmental disturbances as claimed in any one of claims 1 through 3, wherein the detector comprises a sensor selected from a smoke sensor, a gas sensor and heat sensor.
Priority Claims (1)
Number |
Date |
Country |
Kind |
57-147574 |
Aug 1982 |
JPX |
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CROSS REFERENCE TO RELATED PATENT APPLICATION
This is a continuation-in-part patent application of patent application Ser. No. 523,124 filed August 15, 1983 now abandoned.
US Referenced Citations (4)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
523124 |
Aug 1983 |
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