Battery voltage alarm apparatus

a battery voltage and alarm technology, applied in the direction of audible signalling systems, power management, instruments, etc., can solve the problems of not being able to inform the user of the timing of battery exchange, it is almost impossible to continue the alarm for such a long time with a battery having a low or decreased voltage, and the lva will never be raised, so as to achieve the effect of reducing power consumption
USRE37281E1Inactive Publication Date: 2001-07-17PANASONIC CORP
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
PANASONIC CORP
Publication Date
2001-07-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

There is provided a battery voltage alarm apparatus which announces the necessity of battery exchange when battery voltage falls below a predetermined level. The battery voltage alarm apparatus has a battery voltage detector, and a plurality of steps of detection levels for raising battery low voltage alarm are set and alarm sounds generated at individual levels are made to be different from each other. An alarm raised at a higher level is made to be an intermittent singing or a low-volume singing in order to reduce power consumption.
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Description

BACKGROUND OF THE INVENTIONThe present invention relates to a battery voltage alarm apparatus for use in a paging receiver and the like.In a conventional radio paging system, subscribers are sorted into a plurality of groups, a plurality of receiving units are assigned with individual identification numbers and paged by using the identification numbers, and each signal unit drives, upon receipt of a paging signal, an announcing circuit to cause it to raise a ringing or other announcing means which informs the user of the occurrence of paging. In this system, it is preferable that paging be confirmed without fail even when the user is staying at any place and in the paging receiver, detection of a decrease in voltage of a power supply battery and consequent exchange of the battery at good timing are of a very important procedure for the sake of maintaining receiving sensitivity. Accordingly, the battery voltage detecting function is so designed as to raise a battery low voltage alarm...

Claims

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