Radio analog sensor

Details Radio analog sensor Radio analog sensor

1992-10-27

1995-07-04

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular coupling link

340531, 340588, 34087017, 34087021, G08B 108

Patent

active

054304334

ABSTRACT:
A radio analog sensor for transmitting analog signals of a temperature or smoke density to a remote place by radio is used as each of sub devices 12-1 to 12-n. When a change of the analog detection signals of a temperature, a smoke density or the like, which is detected by the analog sensor 10 connected to each of the sub devices, is greater than a predetermined value, the analog signals which have been so far stored in a memory are collectively transmitted to the receiver side by radio. Periodic information is also sent from each of the sub devices 12-1 to 12-n once every two hours so as to supervise the state of the sensors. This permits reliable transmission of necessary data to a remote place without decreasing the life of the battery.

REFERENCES:
patent: 4101872 (1978-07-01), Pappas
patent: 4168494 (1979-09-01), Hummel et al.
patent: 4785283 (1988-11-01), Yuchi
patent: 5128653 (1992-07-01), Yuchi
patent: 5148148 (1992-09-01), Shima et al.
patent: 5151683 (1992-09-01), Takahashi et al.
patent: 5168262 (1992-12-01), Okayama

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