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

Inactive Publication Date: 2001-07-17
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

An object of the present invention is to reduce power consumption during an alarm raised in

Problems solved by technology

However, the conventional LVA faces the following problems.
(1) When power supply voltage is decreased so as to raise an alarm during a user's sleep at night or during a long absence of the user, the alarm is noticed by the user and yet the LVA is continued until eventual complete exhaustion of the battery and consequent interruption of the alarm, with the result that the user cannot be informed of the timing for battery exchange.
Taking the occurr

Method used

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  • Battery voltage alarm apparatus
  • Battery voltage alarm apparatus

Examples

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Embodiment Construction

FIG. 1 is a block diagram showing construction of a battery voltage alarm apparatus according to an embodiment of the invention. Referring to FIG. 1, there are seen a power supply battery 10 and a battery voltage detector 11 for LVA start. A timer 12, for detecting a continuous LVA waveform which begins with LVA start time, is comprised of D flip-flops 12a, 12b and 12c. There are also seen an LVA decision circuit 13 comprised of a latch circuit and operative to detect an LVA, a continuous LVA signal generator 14, an intermittent LVA signal generator 15, .Iadd.wherein the signals are either electrical signals or initiating signals, .Iaddend.a selector 16 for selecting an intermittent or continuous LVA signal, an amplifier 17 and a loudspeaker 18 which process an LVA signal to raise an alarm, conditioning gates 20a and 20b for starting generation of continuous LVA and generation of intermittent LVA, respectively, an initial reset switch 19, an alarm pause (reset) switch 21, a counter ...

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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.

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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Application Information

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IPC IPC(8): G01R31/36H04W88/02G08B3/10G08B21/20H04B7/26H04W52/00H04W84/02
CPCG01R19/16542G08B21/185G08B3/1066G01R31/3682Y10S320/21G01R31/3646
Inventor MOTEGI, TAKAMASA
Owner PANASONIC CORP
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