CN1111887A - Radio selective pager - Google Patents

Abstract

A wireless selective calling receiver comprising a voltage detection circuit which monitors the output voltage of a battery or a booster circuit and detects a predetermined low voltage, and a timer which counts the time from when the voltage detection circuit detects the predetermined low voltage to when a predetermined period elapses. controller, a power consumption reduction controller that reduces the power consumption of radio parts, demodulators, etc. when the period elapses, a report controller that outputs an alarm when a predetermined low voltage is detected and when the set period elapses, and a display controller. The wireless selective calling receiver of the present invention can prevent battery fluid leakage and the like caused by overuse of the battery after a low voltage alarm.

Description

The present invention relates to a selective calling receiver having a low power consumption function.

Conventional selective call receivers use one or two voltage detection circuits to monitor the battery voltage or monitor the output of a booster circuit for boosting the battery voltage. The selective call receiver monitored by a voltage detection circuit detects a certain low voltage through the voltage detection circuit, and the control part generates a low voltage alarm. However, when the selective call receiver continues to be used without replacing the battery, The battery voltage will drop further and the battery will be used until the receiver becomes inoperable.

In addition, when using two voltage detection circuits to monitor the selective calling receiver, one voltage detection circuit is used to generate the same low voltage alarm as the former, and the other voltage detection circuit is used to detect a further low voltage alarm when the battery voltage drops further. When the low voltage is low, stop the action of the receiver, etc. and put the receiver in a low power consumption state. By placing the receiver in a low power consumption state, the battery voltage will not drop sharply afterwards, so as not to cause battery leakage.

However, in the above-mentioned conventional selective call receiver, when the voltage is monitored by a single voltage detection circuit, the battery is continuously used after the low voltage alarm is generated until the receiver fails to operate. Therefore, there is a possibility that a malfunction may occur when the operation is about to fail, or battery fluid leakage may occur when a low-quality battery is used.

When two voltage detection circuits are used to monitor the voltage, since the detection voltage of each voltage detection circuit is separated, the time dispersion from the generation of the low voltage alarm to the state of low power consumption becomes obvious. Therefore, if this time is to be kept almost uniform, each voltage detection circuit is required to have a high detection voltage accuracy, resulting in an increase in cost. In addition, the use of two voltage detection circuits increases the cost itself.

Therefore, the object of the present invention is to provide such a wireless selective calling receiver, which can monitor the time after the low voltage alarm is generated or detected, and prevent the The battery leaks, and by using 1 voltage detection circuit, the cost can be reduced.

In order to achieve the above object, the receiver of the present invention has a voltage detection circuit, a timing circuit and a control circuit, the voltage detection circuit is used to monitor the battery voltage or the output voltage of the boost circuit for monitoring the battery voltage, and detect the specified low voltage; The circuit is used to count the time from the time when the voltage detection circuit detects a predetermined low voltage to the time when a preset period has elapsed; the control circuit is used to reduce the power consumption of the receiver after the above period has elapsed .

According to the present invention, the battery can be used to the maximum extent by allowing the selective call receiver to operate normally during the period from the detection of low voltage to the elapse of the set timer period, and by Afterwards, battery consumption is reduced and battery leakage can be prevented. In addition, since one voltage detection circuit is used, the cost can be reduced.

The above and other objects and features of the present invention will be clearly understood from the following description with reference to the accompanying drawings.

FIG. 1 is a block diagram showing the structure of a selective calling receiver according to one embodiment of the present invention.

Next, an embodiment of the present invention will be described with reference to the drawings. In Figure 1, 1 is the antenna that receives the wireless signal, 2 is the radio part that amplifies the wireless signal from the antenna 1, 3 is the demodulator that demodulates the wireless signal and makes a digital signal, and 4 is the symbol that stores its own individual call number ID-ROM, 5 is the RAM that stores the information contained in the received signal, 6 is the controller, in the controller 6, 7 is the battery reserve function device, 8 is the report controller that controls the report function, and 9 is the control display 10 is a power consumption reduction controller for controlling the selective calling receiver to reduce power consumption, 11 is a timer, 12 is a timing period setter, 13 is a timer controller, 14 is a voltage detection identification memory, and , 15 is a voltage detection circuit for detecting battery voltage or boost voltage drop, 16 is a driver for amplifying and reporting a drive signal, 17 is a speaker, 18 is an LED, 19 is a display for displaying information, 20 is an input part for setting a timing period, 21 is a voltage boosting circuit for boosting the voltage of the battery for components that need to be higher than the voltage of the battery, and 22 is the battery.

Next, the operation of the above-mentioned embodiment will be described. Since the radio selective call operation is the same as that of the prior art, only the voltage control operation will be described here. Once the output voltage of the battery 22 or the booster circuit 21 falls below a predetermined voltage, the voltage detection circuit 15 detects it, and the voltage detection identification memory 14 stores the result. This information is transmitted to the report controller 8 and the display controller 9, and the driver 16, through the loudspeaker 17 and the LED 18, or on the graph of the display 19, respectively carries out the first alarm to urge the battery 22 to be replaced due to the voltage drop of the battery 22. . The information from the voltage detection identification memory 14 is also transmitted to the timing controller 13, and the timer 11 is started by the timing controller 13. The timer 11 starts counting based on a value input from the input section 20 and set in the time period setter 12 in advance. The count of the timer 11 is sent to the power consumption reduction controller 10 when reaching or passing through the period set in the timing period setter 12, and the power consumption reduction controller 10 starts the battery reserve function 7, stops the radio part 2 and The action of the demodulator 3 is to reduce the power consumption, start the report controller 8 and the display controller 9 respectively, and use the speaker 17 and the LED 18 to give an alarm through the driver 16 . Simultaneously, owing to stop the action of receiver for preventing battery from leaking, so carry out the 2nd display of urging to change battery as soon as possible on display 19. Furthermore, the power consumption reduction controller 10 controls the operation of the ID-ROM 4 and the RAM 5, and executes an operation for reducing power consumption.

In addition, as an action to further reduce power consumption, when the count of the timer 11 reaches or passes through the period set in the timer period setter 12, the radio section 2 and the demodulator 3 are stopped and a report is made simultaneously. The operations of the controller 8 and the display controller 9 are also stopped, and an operation for reducing power consumption is performed.

As can be seen from the embodiments described above, since the present invention has a voltage detection circuit that monitors the battery voltage or monitors the output voltage of a voltage boosting circuit that boosts the battery voltage and detects a predetermined low voltage, after the voltage detection circuit detects a predetermined low voltage to elapse The timing circuit for counting time within a predetermined period of time and the control circuit for reducing the power consumption of the receiver when the period passes, so it can be prevented that the battery is not replaced immediately after the low-voltage alarm when the low-quality battery is used. Liquid leakage caused by deterioration of the battery when the battery has been used to its limit or left unattended.

In addition, according to the present invention, since the transition to the power consumption reduction state after the battery voltage drops is performed by timing, only one voltage detection circuit can be used, and the cost can be reduced compared with the case of using two voltage detection circuits.

Claims (2)

1. The wireless selective calling receiver has a voltage detection circuit, a timing circuit and a control circuit. The voltage detection circuit is used to monitor the battery voltage or monitor the output voltage of the boost circuit for boosting the battery voltage or to detect the specified low voltage. Voltage; the timing circuit is used to count the time from the time when the voltage detection circuit detects the specified low voltage to the preset specified period; the control circuit is used to make the receiver’s Power consumption is reduced. 2. The wireless selective calling receiver according to claim 1, comprising a circuit for outputting an alarm when a predetermined low voltage is detected and when a predetermined period elapses.

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