JP5974537B2 - Battery-powered alarm - Google Patents

Description

  The present invention relates to an alarm device that detects an abnormality with a sensor and issues an alarm. In particular, the present invention relates to a battery type alarm using a battery as a power source.

  For alarm devices such as gas alarm devices and fire alarm devices, products using batteries as power sources are provided. As the batteries of these battery-type alarm devices, lithium primary batteries that are optimal for extending the life are used, and are designed to be usable for a predetermined period (for example, 5 years).

  The purpose of the alarm is to detect the occurrence of CO or fire due to gas leakage or incomplete combustion, and to inform the surroundings of the abnormality by an alarm sound, alarm display, external output, or the like. However, in the case of a battery type alarm device, when the battery runs out, the purpose cannot be achieved.

  For this reason, the battery type alarm device has a function (battery voltage drop warning function) for detecting a battery voltage drop and notifying the user in advance of an alarm with a warning sound or the like. As a result, the user can detect a decrease in battery voltage before the device does not operate normally, and can replace the alarm body or replace the battery before the alarm device loses its function. (For example, refer to Patent Document 1).

Specifically, after the battery voltage drop is detected (during battery warning), the battery voltage drop warning sound (voice message “Battery is dead”) Information) is repeated to inform the user of a decrease in battery voltage.
At this time, in order to reduce battery consumption due to a battery voltage drop warning sound as much as possible, for example, a method of notifying by a voice message every 10 minutes and an electronic sound every minute is performed.

  The battery voltage drop is detected by passing a large current from the battery to the pseudo load at regular intervals (for example, every 25 hours), detecting the battery voltage at that time, and checking whether the battery voltage is less than a predetermined voltage value. Battery voltage drop determining means for determining Here, the pseudo load is composed of a resistor having a resistance value corresponding to the maximum load of the circuit (see, for example, Patent Document 2).

Such a conventional battery-type alarm device (for example, a gas leak alarm device) will be further described as follows for a gas leak alarm that is performed when an abnormality occurs (at the time of a gas leak alarm).
[Occurrence of gas leak alarm for conventional battery-powered alarm devices: Fig. 8]
FIG. 8 is a diagram showing a time chart for issuing a sound alarm (gas leak alarm) of a conventional battery-type alarm device.

  In the gas detection from the initial stage to T1, since the predetermined gas concentration (alarm level) is not exceeded, it is determined that there is no gas in the surrounding area and no alarm is given. When the gas concentration becomes equal to or higher than the predetermined gas concentration (alarm level), an audio alarm and an alarm display (alarm lamp display: LED) are started (T1).

  During the gas leak alarm, an electronic sound of “Woo-Pippi-Pippi” and a voice message (voice alarm) of “Is gas leaking?” Are displayed and an alarm lamp is used to display an alarm. The sound alarm and the alarm display are continuously performed until the gas leak is eliminated (T1 to T2).

Thereafter, when the gas concentration is gradually lowered by ventilation or the like and falls below the predetermined gas concentration, the alarm state is canceled and the sound alarm and the alarm display are stopped (T2).
On the other hand, when the alarm continues for several hours or several tens of hours (T3 to T4), the battery voltage gradually decreases due to battery consumption. This is because at the time of alarm, the current consumption is 1000 times or more that at the time of monitoring (normal time). For this reason, if the alarm continues for a long time, the battery voltage gradually decreases at a pace that greatly exceeds the normal time.
If the alarm state continues even though the battery voltage has dropped, the device will not be able to operate normally because the voltage is lower than the operable voltage of the device, and even if there is a gas leak, a voice alarm and warning display will be performed Cannot be performed (T4).

JP 2005-208807 A JP 2001-41795 A

Such a conventional battery-type alarm device has the following problems.
As described above, a sufficient battery voltage is necessary for continuous alarms in the event of gas leaks. However, when a gas or fire is detected during the battery voltage drop warning, there may be insufficient battery capacity to continuously give a gas leak alarm or fire alarm.

  For example, a warning by a voice message every 10 minutes for a battery voltage drop warning is about 1 second, and a warning by an electronic sound every minute is about 100 ms. At this time, the battery capacity used by the battery voltage drop warning for 3 days is 14 to 15 minutes (actual alarm time 12 hours × 24 hours per hour) when converted into the continuous alarm time of a voice alarm in the event of gas leakage or the like. × 3 days).

  That is, in a battery-type alarm device in which a battery voltage drop warning is in progress, the battery capacity means that there is only room for performing a gas leak continuous alarm for 14 to 15 minutes, and the battery capacity is not sufficient.

  In other fields, for example, in a gas meter, when 3 days (or 7 days) have elapsed after the battery voltage drop is detected, the shut-off valve is forcibly closed and the gas cannot be used until the gas meter is replaced. Controls the use of gas. However, battery-powered alarms do not have such control and may continue to be used until battery capacity is completely depleted.

Therefore, the following situations can be considered.
If the battery alarm is in the battery voltage low warning state and the surrounding environment is in a gas leak state, and if there is no user when the gas leak alarm is issued (there is no one in the vicinity), the alarm device will use a gas leak alarm. Controls to issue continuously. However, since there is not sufficient battery capacity, the gas leak alarm is not actually issued in about 14 to 15 minutes. Then, the battery is completely exhausted during the absence, and the alarm device does not operate, and the user does not notice the gas leak after returning home.

  In many actual battery-powered alarms, a battery voltage drop is detected and a battery voltage drop warning is issued at the time when the remaining battery level is more than the above three days. There is not enough battery capacity to enable continuous gas leak alarms.

In view of this, a method is conceivable in which the battery voltage threshold value for detecting battery exhaustion is set high, and battery exhaustion is detected when there is a sufficient margin in the remaining battery level.
However, in this case, a battery voltage drop warning is issued even though the battery capacity still remains. Therefore, battery replacement (or replacement of the alarm device main body) is performed with a large battery capacity remaining, which is not efficient.

  As described above, in the battery type alarm device, when an abnormal state such as gas or fire is detected in a state where the battery capacity after the battery voltage drop warning is not sufficient, a sufficient alarm cannot be issued. Therefore, ensuring the reliability of the device after the battery voltage drop warning (in a state where the battery capacity is not sufficient) has become an issue.

  Therefore, in order to solve the above-described problems, the present invention prevents battery consumption of the battery-type alarm device at normal time or in a state where the battery capacity after the battery voltage drop warning is not sufficient, thereby improving the reliability of the device. The purpose is to improve.

To achieve the above object, according to the present invention, at least one detected a detection object, a detection unit for outputting the converted the detection level to the level of the electric signal, before detection unit has output when the level of the serial electrical signal is determined and Jo Tokoro determining controller to whether exceeds threshold, the level of pre-Symbol electrical signal by the controller exceeds a threshold value of the Jo Tokoro, the detection target an alarm unit for output the alarm in response to said detection unit, a battery-powered alarm device equipped a battery to each of the control unit and the alarm unit giving a working power, yet the voltage value of the battery comprising a battery voltage measuring unit that measures, when the alarm is output by the alarm unit, the control section, when the battery voltage measuring unit to measure the voltage values follows the first voltage value of a predetermined It stops the output of the audio alarm of the alarm unit, then, Serial battery voltage measuring unit is a battery-powered alarm device, wherein said possible to perform the output of the audio alarm when the measured voltage value exceeds the pre-Symbol first voltage value.

In order to achieve the above object, according to the present invention, at least one detected a detection object, a detection unit for the conversion and output the detection level to the level of the electric signal, the detection unit outputs when the level of the previous SL electrical signal is determined and Jo Tokoro determining controller to whether exceeds threshold, the level of pre-Symbol electrical signal by the controller exceeds a threshold value of the Jo Tokoro, wherein an alarm unit for output the alarm corresponding to the detection target, the detection unit, a battery-powered alarm device equipped a battery to each of the control unit and the alarm unit giving a working power, yet the battery comprising a battery voltage measuring unit that measures a voltage value, when the alarm by the alarm unit is output, the control unit has the battery voltage measuring unit measures a voltage value less than the first voltage value of a predetermined stops the output of the audio alarm the alarm unit when, their After the battery voltage measuring unit is a battery-powered alarm device, wherein said possible to perform the output of the audio alarm when the measured voltage value of the second or voltage value of a predetermined higher than the first voltage value.

In order to achieve the above object, according to the present invention, at least one detected a detection object, a detection unit for the conversion and output the detection level to the level of the electric signal, the detection unit outputs when the level of the previous SL electrical signal is determined and Jo Tokoro determining controller to whether exceeds threshold, the level of pre-Symbol electrical signal by the controller exceeds a threshold value of the Jo Tokoro, wherein an alarm unit for output the alarm corresponding to the detection target, the detection unit, a battery-powered alarm device equipped a battery to each of the control unit and the alarm unit giving a working power, yet the battery comprising a battery voltage measuring unit that measures a voltage value, when the alarm by the alarm unit is output, the control unit has the battery voltage measuring unit measures a voltage value less than the first voltage value of a predetermined stops the output of the audio alarm the alarm unit when, their After, even when the battery voltage measuring unit is not measured prior Symbol greater voltage value than the first voltage value, the battery-powered alarms, characterized in that to perform the output of the audio alarm when a predetermined time has elapsed Use a vessel.

In order to achieve the above object, according to the present invention, at least one detected a detection object, a detection unit for the conversion and output the detection level to the level of the electric signal, the detection unit outputs when the level of the previous SL electrical signal is determined and Jo Tokoro determining controller to whether exceeds threshold, the level of pre-Symbol electrical signal by the controller exceeds a threshold value of the Jo Tokoro, wherein an alarm unit for output the alarm corresponding to the detection target, the detection unit, a battery-powered alarm device equipped a battery to each of the control unit and the alarm unit giving a working power, yet the battery comprising a battery voltage measuring unit that measures a voltage value, when the alarm by the alarm unit is output, the control unit has the battery voltage measuring unit measures a voltage value less than the first voltage value of a predetermined stops the output of the audio alarm the alarm unit when, before Wherein when the battery voltage measuring unit to measure the voltage value of the high more than a predetermined second voltage value than the first voltage value to perform the output of the audio alarm, wherein after discontinuation of the output of the audio alarm, the battery voltage measuring unit Even if it is a case where the voltage value more than the said 2nd voltage value is not measured, it is set as the battery-type alarm device which makes the said voice alarm output when predetermined time passes.

Further, according to the present invention, in the above configuration, the battery type alarm device is characterized in that the voice alarm pattern output when the predetermined time has elapsed has the least current consumption. .

In order to achieve the above object, according to the present invention, a detection unit that detects at least one detection target, converts the detection level to an electric signal level, and outputs the detection unit, the detection unit outputs A control unit that determines whether or not the level of the electrical signal exceeds a predetermined threshold; and when the control unit determines that the level of the electrical signal exceeds a predetermined threshold, an alarm corresponding to the detection target is issued. A battery-type alarm device comprising: an alarm unit for outputting; and a battery for supplying operating power to each of the detection unit, the control unit, and the alarm unit, and further a battery voltage measurement unit for measuring a voltage value of the battery When the alarm is output by the alarm unit, the battery voltage measurement unit measures the voltage value of the battery every predetermined number of times of voice alarm output, and the control unit measures the Nth time Voltage value Comparing the N + 1 th voltage values measured, when the difference is greater than a predetermined reference value, the battery-powered alarm device, characterized in that to reduce the output frequency of subsequent said audio alarm.

In order to achieve the above object, according to the present invention, a detection unit that detects at least one detection target, converts the detection level to an electric signal level, and outputs the detection unit, the detection unit outputs A control unit that determines whether or not the level of the electrical signal exceeds a predetermined threshold; and when the control unit determines that the level of the electrical signal exceeds a predetermined threshold, an alarm corresponding to the detection target is issued. A battery-type alarm device comprising: an alarm unit for outputting; and a battery for supplying operating power to each of the detection unit, the control unit, and the alarm unit, and further a battery voltage measurement unit for measuring a voltage value of the battery When the alarm is output by the alarm unit, the battery voltage measurement unit measures the voltage value of the battery every predetermined number of times of voice alarm output, and the control unit measures the Nth time Voltage value Compares the voltage value measured in N + 1 th, when the ratio is greater than a predetermined reference ratio, and battery-powered alarm device, characterized in that to reduce the output frequency of subsequent said audio alarm.

Further, according to the present invention, in the above configuration, the alarm unit starts the audio alarm and the alarm display based on the output of the alarm, stops the output of the audio alarm or decreases the output frequency. The battery-type alarm device is characterized in that the alarm display is continuously performed even during the period .

In order to achieve the above object, according to the present invention, a detection unit that detects at least one detection target, converts the detection level to an electric signal level, and outputs the detection unit, the detection unit outputs A control unit that determines whether or not the level of the electrical signal exceeds a predetermined threshold; and when the control unit determines that the level of the electrical signal exceeds a predetermined threshold, an alarm corresponding to the detection target is issued. A battery-type alarm device comprising: an alarm unit for outputting; and a battery for supplying operating power to each of the detection unit, the control unit, and the alarm unit, and further a battery voltage measurement unit for measuring a voltage value of the battery The control unit stores in advance the output frequency of an audio alarm output for each predetermined range of the voltage value, and the audio unit outputs the audio alarm and the alarm display based on the alarm. Police For the control unit, compares the voltage value of each of the predetermined range in which the battery voltage measuring unit is previously stored voltage value measured, characterized in that to output an output frequency according to each cell A type alarm.

According to the present invention, in the above configuration, the output frequency of the voice alarm for each predetermined range of the voltage value stored in advance decreases as the voltage value becomes a small value. It is set as the battery type alarm device characterized by setting .

Also, according to the present invention, in the above configuration, the output frequency of the sound alarm for each predetermined range of the voltage value stored in advance is output at least once per cycle of the detection period of the detection unit. It is set as the battery type alarm device characterized by setting .

According to the present invention, in the above configuration, the combined maximum current value that is connected in parallel with the battery and that flows from the battery to the detection unit, the control unit, and the alarm unit in response to an instruction from the control unit; The battery voltage measuring unit measures a voltage value of the battery when a current flows through the pseudo load unit in a state where the alarm is not output by the alarm unit; This is a battery-powered alarm device.

According to the present invention, in the above configuration, the battery voltage measurement unit is configured such that when the alarm is output by the alarm unit, the power consumption is maximized in one output of the audio alarm. The battery-type alarm device is characterized by measuring the voltage value of the battery.

  According to the present invention, it is possible to prevent battery consumption of the battery-type alarm device at the normal time or in a state where the battery capacity after the battery voltage drop warning is not sufficient, thereby improving the reliability of the device.

It is a schematic block diagram showing an example of the internal configuration of the battery type alarm device of the first embodiment of the present invention. It is a figure which shows the time chart of the alerting | reporting of the audio | voice warning of the battery-type alarm device of 1st Example of this invention. It is a figure which shows the battery voltage measurement timing of the battery-type alarm device in the gas leak alarm of 1st Example of this invention. It is a figure which shows the flowchart of the alerting | reporting of the voice alarm of the battery-type alarm device of 1st Example of this invention. It is a figure which shows the relationship between the battery voltage range of the battery-type alarm device of 2nd Example of this invention, and an audio | voice alarm generation frequency. It is a figure which shows the time chart of the alerting | reporting of the voice alarm of the battery-type alarm device of the 2nd Example of this invention. It is a figure which shows the time chart of the alerting | reporting of the voice alarm of the battery-type alarm device of the 3rd Example of this invention. It is a figure which shows the time chart of the alerting | reporting alerting | reporting of the conventional battery-type alarm device.

  An embodiment of the present invention will be described below with reference to the drawings. However, the following description is merely an example of the present invention, and the present invention is not limited to this. That is, it is possible for a person having ordinary knowledge in the field to implement many modifications within the technical idea of the present invention.

[Internal configuration of the battery type alarm device of the first embodiment: FIG. 1]
First, the internal configuration of the battery-type alarm device according to the first embodiment of the present invention will be described with reference to FIG.
FIG. 1 is a schematic block diagram showing an example of the internal configuration of the battery-type alarm device according to the first embodiment of the present invention. 1 is a gas sensor, 2 is a heater resistance, 3 is a sensor resistance, 4 is a load resistance, 5 is a battery unit, 6 is SW1, 7 is SW2, 8 is a control circuit unit, 8a is a battery voltage measurement unit, 8b is a counting unit, 8c is a storage unit, 9 is an alarm unit, 10 is an alarm sound output unit, 11 is an alarm display unit, 12 is an external alarm output unit, 13 is an ambient temperature detection unit, 14 is a pseudo load, 15 is SW3, and 16 is a power circuit. Part. Although omitted in the present embodiment, a CO sensor or a fire sensor may be mounted in addition to the gas sensor.

  First, as a gas detection means, a gas sensor 1 for detecting a detection target gas is provided with a heater resistor 2 for heating the sensor and a sensor resistor 3 for detecting a gas concentration according to the concentration of the surrounding gas. Yes. Furthermore, load resistors 4, SW1 (6) and SW2 (7) are provided as constituents of the gas detection means. SW1 (6) and SW2 (7) are transistor switches.

  Moreover, the battery part 5 and the power supply circuit part 16 are provided as a power supply means. The battery unit 5 supplies power, and the power supply circuit unit 16 performs step-down or step-up of voltage, and plays a role of supplying the output voltage output from the battery unit 5 to the control circuit unit 8 in a stabilized constant voltage. .

  The control circuit unit 8 is a microcomputer that controls the operation of the entire alarm device. The control circuit unit 8 includes a battery voltage measuring unit 8a that measures the voltage value of the battery unit 5, a counting unit 8b that counts the number of alarms, and a storage unit 8c that holds initial setting values, programs, data, and the like of the alarm device. ing.

  The control circuit unit 8 is connected to an ambient temperature detection unit 13 and an alarm unit 9. The ambient temperature detector 13 performs a gas concentration temperature correction calculation and the like. The alarm unit 9 includes an alarm sound output unit 10, an alarm display unit 11, and an external alarm output unit 12. The alarm sound output unit 10 is a part that emits a sound such as an alarm sound, and includes, for example, a speaker or a buzzer. The alarm display part 11 is comprised by LED (light emitting diode). The external alarm output unit 12 outputs an alarm signal to an external device.

  In addition, a pseudo load 14 that is driven from the control circuit unit 8 via SW3 (15) is provided. The pseudo load 14 is composed of a resistor having a resistance value corresponding to the maximum load of the circuit. SW3 (15) is a transistor switch.

The above is the configuration of the battery type alarm device of the first embodiment of the present invention.
[Operation of the battery type alarm device of the first embodiment]
Next, the operation of the battery type alarm device of the first embodiment of the present invention will be described.

  The battery unit 5 supplies a power supply of 3 volts and supplies a voltage to the entire circuit. The voltage from the battery unit 5 is stepped down or boosted in the power supply circuit unit 16 and supplied to the circuit as a constant voltage.

  The voltage stepped down or boosted by the power supply circuit unit 16 is supplied to a sensor system circuit that is a gas detection means. As described above, the gas detection means includes the heater resistance 2, the sensor resistance 3, the load resistance 4, SW1 (6), and SW2 (7) in the gas sensor 1.

At the time of gas detection, the control circuit unit 8 turns on the transistor switches SW1 (6) and SW2 (7) via the output terminals OUT1 and OUT2, and the heater resistor 2, the sensor resistor 3 and the load resistor 4 in the gas sensor 1 A sensor system circuit comprising:
Then, the control circuit unit 8 detects the sensor output voltage of the gas sensor 1 via the AD (analog-digital) conversion input terminal AD1, and determines whether the sensor output has a predetermined gas concentration. Leak detection is performed.

  The ambient temperature detection unit 13 inputs the ambient temperature value to the control circuit unit 8 via the AD conversion input terminal AD2, and causes the control circuit unit 8 to perform temperature correction calculation of the gas concentration based on the ambient temperature.

  Here, when the gas leakage judgment is made by the control circuit unit 8, the alarm sound output unit 10 of the alarm unit 9 outputs the gas leakage state to the outside by a voice message or an electronic sound based on the control from the control circuit unit 8. Inform. Further, the alarm display unit 11 notifies the outside of the alarm state by LED display by blinking / lighting of the LED. The external alarm output unit 12 outputs an alarm signal to an external device such as a gas meter or a central monitoring panel. As a result, a gas leak is reported to the surroundings.

The above is the operation of the battery type alarm device of the first embodiment of the present invention.
[Operation for determining battery voltage drop of battery-powered alarm device of first embodiment]
Next, the operation of determining the battery voltage drop of the battery type alarm device according to the first embodiment of the present invention will be described.

  In a state where the gas leakage alarm is not issued (normal time), the pseudo load 14 is used for checking the battery voltage drop. The pseudo load 14 is driven by a signal from the control circuit unit 8 through the transistor SW3 (15).

  The battery voltage measurement unit 8a of the control circuit unit 8 turns on the transistor SW3 (15) when the battery voltage check timing comes, and causes a current to flow through the pseudo load 14, and the battery voltage value at that time is supplied from the AD conversion input terminal AD3. Read. Further, the battery voltage value when the alarm sound output unit 10 is operated is read from the AD conversion input terminal AD3. Thereby, it is determined whether or not the battery voltage is lowered.

  On the other hand, while the gas leak alarm is being issued, the battery voltage measuring unit 8a of the control circuit 8 reads the battery voltage from the AD 3 without using the pseudo load 14, and determines whether or not the battery voltage is lowered. .

In any case, if it is determined that the battery voltage is low, a low battery voltage warning sound (voice message “Battery is dead” and electronic beep sound) will be issued. .
The above is the operation for determining the battery voltage drop of the battery type alarm device of the first embodiment of the present invention.

[Time chart of voice alarm of the battery type alarm device of the first embodiment: FIG. 2]
Next, referring to FIG. 2, a time chart for issuing a gas leak sound alarm of the battery type alarm device of the first embodiment of the present invention will be described.

FIG. 2 is a diagram showing a time chart for issuing a gas leak sound alarm of the battery type alarm device of the first embodiment of the present invention.
First, in the gas detection from the initial stage to T1, the gas concentration does not exceed a predetermined gas concentration (alarm level). Therefore, it is determined that there is no gas in the surroundings, and no alarm is given.

In the gas detection after T1, the gas concentration exceeds the predetermined gas concentration (T1). For this reason, it is determined that there is a gas in the surroundings, and a gas leak alarm (voice alarm / alarm display) is started.

  And if a gas leak voice alarm continues, a battery voltage will fall gradually. At this time, the battery voltage measuring unit 8a of the control circuit unit 8 reads the battery voltage at the time of the voice alarm from the AD 3, and determines whether or not the battery voltage is lowered. As described above, the circuit of the pseudo load 14 used for the battery voltage check at the normal time is not used.

When the voice alarm continues, the battery voltage continues to decrease due to battery consumption. And if it falls below a predetermined 1st voltage value, operation which pauses a voice alarm and continues alarm display will be performed (T2).
Here, the predetermined first voltage value is set to a voltage value (for example, a voltage higher by 0.1 to 0.2 V) than a voltage at which the device cannot operate. That is, when the power supply circuit unit 16 in FIG. 1 is a booster circuit, the voltage value is higher than the lowest operating voltage of the booster circuit. For example, if the minimum operating voltage of the booster circuit is 1.0V, the voltage is set to 1.1 to 1.2V.

  When the voice alarm is paused, the current consumption of the device during the voice alert pause is 1/100 or less of the voice alarm. Accordingly, the battery voltage gradually recovers by eliminating the discharge at a large current due to the voice alarm. In general, the voltage of a battery gradually decreases when a large current discharge continues, and gradually recovers when the discharge is stopped.

  Then, when the battery voltage recovers during the pause of the voice alarm and becomes a predetermined second voltage value larger than the first voltage value, the voice alarm is resumed (T3). The second voltage value is a voltage value higher than the first voltage value, and is set to, for example, 1.3 to 1.4V.

Further, in a situation where gas leakage continues, the above operation is repeated (T4 to T6).
Thereafter, when the surrounding gas concentration falls below a predetermined gas concentration due to ventilation or the like, the alarm is stopped (T6).

The above is the description of the time chart of the sound alarm generation of the battery type alarm device of the first embodiment of the present invention.
[Battery voltage measurement timing of battery type alarm device during gas leakage alarm of first embodiment: FIG. 3]
Next, referring to FIG. 3, the timing for measuring the battery voltage of the battery type alarm device during the gas leak alarm of the first embodiment of the present invention will be described.

FIG. 3 is a diagram showing the battery voltage measurement timing of the battery type alarm device during the gas leak alarm according to the first embodiment of the present invention.
During the audio alarm, the current consumption changes depending on the audio content, so the battery voltage also changes. Therefore, FIG. 3 shows a change in voltage during one voice alarm. That is, the voltage up and down as shown in FIG. 3 are repeated during the voice alarm message “Woo-U beeping gas is leaking” in FIG. As a whole, the voltage gradually decreases as shown in FIG.

  In general, since a battery has an internal resistance, the battery voltage decreases more as a larger current flows. In particular, in the battery at the end of discharge, the battery internal resistance greatly increases. Therefore, at the time of large current discharge such as a voice alarm, the battery voltage decreases greatly.

  The “alarm sound (example)” in FIG. 3 shows a sound waveform of a sound alarm at the time of gas leakage. Here, it can be seen that the battery voltage becomes the lowest during the second “Woo” alarm. This is because at this time, the output from the speaker is the largest and the current consumption is maximized. In addition, since the battery voltage recovers slowly, the voltage is lower than the first “Woo”.

  Here, the battery voltage measuring unit 8a of the control circuit unit 8 detects the battery voltage at the timing of T2 in order to detect the timing at which the battery voltage reaches the lowest point. In the count up to T2, the passage of time is counted by the counting unit 8b of the control circuit 8 from the start of the voice (T1), and the battery voltage is read at the timing T2.

  Note that the relationship between the sound alarm and the battery voltage varies depending on the contents of the sound alarm (gas leak alarm, CO alarm, fire alarm, etc.). For this reason, the monitoring timing is appropriately set to an optimal value (the lowest point of the battery voltage) according to each alarm sound. The setting varies greatly depending on the type of battery (whether it is a lithium battery or an alkaline battery), and therefore an optimal value is appropriately set in consideration of the type of battery.

The above is the description of the timing for measuring the battery voltage of the battery-type alarm device during the gas leak alarm according to the first embodiment of the present invention.
[Flowchart of voice alarm for the battery type alarm device of the first embodiment: FIG. 4]
Subsequently, referring to FIG. 4, a flowchart for issuing a sound alarm of the battery type alarm device of the first embodiment of the present invention will be described.

FIG. 4 is a diagram showing a flowchart of sound alarm generation of the battery type alarm device of the first embodiment of the present invention.
The process according to this flowchart is repeatedly performed by the control circuit unit 8 while an abnormality such as a gas leak is detected and a sound alarm is executed.

  First, the control circuit unit 8 determines whether or not the current state during the voice alarm is a battery voltage drop (S1). If the battery voltage is not decreasing, it is determined that the remaining battery level is still sufficient, and the process is terminated (N in S1). At this time, as described above, the battery voltage measuring unit 8a of the control circuit unit 8 reads the battery voltage from the AD 3 without using the pseudo load 14, and determines whether or not the battery voltage is lowered.

  If the battery voltage drop is being established, the control circuit unit 8 determines whether it is the battery voltage measurement timing (S2). Whether or not the battery voltage measurement timing is reached is determined based on control by the counting unit 8b of the control circuit unit 8. If it is not time to measure the battery voltage, the control circuit unit 8 ends the process (N in S2).

If it is time to measure the battery voltage, the battery voltage measuring unit 8a of the control circuit unit 8 reads the battery voltage value from AD3 (S3).
Further, the control circuit unit 8 determines whether or not the current state is a state equal to or less than a predetermined first voltage value (while the voice alarm is stopped) (S4).

  If the current state is not less than the first voltage value (voice alarm is not in operation) (N in S4), the control circuit unit 8 determines whether or not the read battery voltage value is less than or equal to the predetermined first voltage value. (S5).

If the battery voltage value is equal to or lower than the first voltage value (N in S5), the control circuit unit 8 pauses the voice alarm (S6).
If the battery voltage value is greater than the first voltage value, the control circuit unit 8 ends the process.

  On the other hand, when the control circuit unit 8 determines in step S4 that the current state is equal to or lower than the first voltage value (while the voice alarm is paused) (Y in S4), the voice alarm is paused and then predetermined. It is determined whether time (1 minute) has elapsed (S7).

  When the predetermined time has elapsed (Y in S7), the control circuit unit 8 forcibly restarts the voice alarm (S9). In the case of forcibly resuming the voice alarm, it is possible to perform only “beep-pip-peep” electronic sound that does not use much current, considering that the battery voltage is not sufficiently recovered.

If the predetermined time has not elapsed in step S7 (N in S7), the control circuit unit 8 determines whether or not the read battery voltage value is equal to or lower than the predetermined second voltage value (S8).
If the battery voltage value is equal to or higher than the predetermined second voltage value (Y in S8), the control circuit unit 8 determines that the battery voltage has been restored, and restarts the sound alarm (S9).

If the battery voltage value is smaller than the predetermined second voltage value in step S8, the control circuit unit 8 ends the process (N in S8).
The above is the description of the flowchart of the sound alarm generation of the battery type alarm device of the first embodiment of the present invention.

[Effect of the first embodiment]
Thus, according to the first embodiment of the present invention, even when the voice alarm continues for a long time, the voice alarm is suspended before the battery suddenly runs out and the device cannot be operated. Prevents all functions from stopping.

  Also, if an abnormality such as gas leakage occurs while the battery voltage of the battery-type alarm is low (= battery voltage drop warning to replacement of a new device or battery), the alarm time is made longer than before. be able to.

Therefore, the battery-type alarm device of the present invention can continue the alarm while suppressing the consumption of the battery even when an alarm state such as a gas leak occurs when there is no person around.
In addition, the battery-type alarm device of the present invention can increase the safety period for the user because the period until the battery-type alarm device can no longer operate normally can be made longer than before.

  In addition, since the battery voltage tends to recover with the passage of time, the battery voltage can be expected to recover during the pause of the voice alarm. That is, since the voice alarm requires a current consumption 100 times or more that of the alarm display (LED), the battery voltage can be recovered by temporarily stopping the voice alarm. Therefore, the battery type alarm device of the present invention can monitor the recovery of the battery voltage, and once the battery voltage recovers, it can issue an audio alarm again to call attention.

  In particular, the battery-type alarm device according to the present invention sets the first voltage value and the second voltage value that is higher than the first voltage value, respectively, so that the battery alarm is sufficiently recovered and then the sound alarm is issued again. Can be done.

  Since the device can be used without impairing reliability even after the battery voltage drop warning, the battery-type alarm device of the present invention can ensure safety until the battery is replaced or the main body is replaced.

[Relationship between battery voltage range and voice alarm frequency of battery type alarm of second embodiment: FIG. 5]
Next, a battery type alarm device according to a second embodiment of the present invention will be described. In the description, portions that are the same as those in the first embodiment are omitted, and different portions are mainly described.

First, the relationship between the battery voltage range of the battery type alarm device of the second embodiment and the frequency of sound alarm generation will be described with reference to FIG.
FIG. 5 is a diagram showing the relationship between the battery voltage range of the battery-type alarm device and the frequency of sound alarm occurrence.

  In the battery type alarm device of the second embodiment, the battery voltage measuring unit 8a of the control circuit unit 8 changes the sound alarm notification frequency according to the read battery voltage value. Note that the storage unit 8c of the control circuit unit 8 stores in advance the relationship between the battery voltage range of FIG.

First, when the measured battery voltage is 2.2 V or higher, a sound alarm is continuously issued (occurrence frequency: 1).
If the measured voltage is 2.0 to 2.2 V, the voice alarm notification frequency is halved, and the voice alarm is thinned out and output every time. For example, if the voice alarm is output for 5 seconds, the voice alarm is given for 5 seconds and the pause time is 5 seconds.

  If the measured voltage is 1.8 to 2.0 V, the voice alarm notification frequency is set to 1/3, and the voice alarm time for two times is paused every time. For example, if the voice alarm time is 5 seconds, the voice is issued for 5 seconds and the pause time is 10 seconds.

Thereafter, as described above, as shown in FIG. 5, the alarm frequency of the voice alarm is changed in accordance with each battery voltage range to suppress a rapid decrease in battery capacity.
Here, the time for which the voice alarm is paused is more effective because the degree of battery consumption decreases when the time is longer. However, if the pause time of the voice alarm is made too long, there are problems such as the degree of alarm tension becoming weak and the surrounding people becoming difficult to notice the alarm itself.

  In addition, when a window is opened and ventilated after a gas leak occurs, the gas concentration decreases and the alarm is released.However, if the audio alarm pause time is too long, the alarm is released and the alarm is released. There may also be a problem such that it is difficult for the surrounding people to notice that it has returned (gas concentration has decreased).

  For this reason, it is preferable to suppress the frequency of the voice alarm notification to at least a time within the gas leak detection cycle. For example, if the gas leak detection cycle is every 30 seconds, it is preferable to perform an audio alarm at least once every 30 seconds (5 seconds alarm / 25 seconds pause).

Note that the battery voltage value and the frequency of occurrence described above are merely examples, and are set to optimal values as appropriate so that the minimum operating voltage of the device and the severity of alarm are not diminished.
The above is the description of the relationship between the battery voltage range of the battery type alarm device of the second embodiment and the sound alarm notification frequency.

[Time chart of voice alarm of battery-operated alarm of second embodiment: FIG. 6]
Next, referring to FIG. 6, a time chart of the sound alarm generation of the battery type alarm device of the second embodiment will be described.

In FIG. 7, the gas detection from the initial stage to T1 does not exceed the predetermined gas concentration. Therefore, it is determined that there is no gas around, and no alarm is given.
In the gas detection after T1, the gas concentration exceeds the predetermined gas concentration. For this reason, it is determined that there is a gas in the surroundings, and a gas leak alarm (voice alarm / alarm display) is started.

At this time, as in the above embodiment, the battery voltage measuring unit 8a of the control circuit unit 8 reads the battery voltage value during the voice alarm.
When the voice alarm continues, the battery voltage gradually decreases, and when the voice alarm continues, the battery voltage further decreases due to battery consumption (T1 to T2).

  When the battery voltage falls below 2.2 V, the voice alarm notification frequency is changed to 1/2 as shown in the table of FIG. 5 (T2). However, in a state where the voice alarm continues, the battery voltage continues to decrease further.

Therefore, when the battery voltage falls below 2.0 V, the sound alarm notification frequency is changed to 1/3 as shown in FIG. 5 (T3).
Thereafter, as described above, the battery-type alarm device according to the present invention performs a process of changing the notification frequency of the sound alarm according to the value of the measured battery voltage.

The above is the description of the time chart of the sound alarm generation of the battery type alarm device of the second embodiment.
[Effect of the second embodiment]
Thus, according to the second embodiment of the present invention, the battery voltage range during the sound alarm is divided into a plurality of stages in advance, and the number of times of sound alarm output is set for each battery voltage range. Then, during the actual voice alarm, the voice alarm notification frequency is changed to the number of outputs corresponding to each battery voltage value measured there. Therefore, the battery-type alarm device according to the present invention can reduce the frequency of voice alarm notification as the battery voltage decreases during voice alarm, thereby reducing battery consumption and extending the time that the voice alarm can be continued. . This is particularly effective in a battery-type alarm device after a battery voltage drop warning.

  In addition, the battery-type alarm device of the present invention can provide a battery voltage recovery time after a sound alarm requiring a large current discharge is issued by changing a sound alarm notification frequency. Therefore, the battery-type alarm device of the present invention can use the battery capacity to the end. In the battery type alarm device of the present invention, since the batteries can be used efficiently to the end, the number of batteries can be reduced, and the cost can be reduced and the device can be reduced in size and weight.

[Time chart of voice alarm notification of battery type alarm device of third embodiment: FIG. 7]
Next, a battery type alarm device according to a third embodiment of the present invention will be described. In the description, portions common to the first or second embodiment are omitted, and different portions will be mainly described.

First, referring to FIG. 7, a time chart of the sound alarm generation of the battery type alarm device of the third embodiment will be described.
In FIG. 7, the gas detection from the initial stage to T1 does not exceed the predetermined gas concentration. Therefore, the control circuit unit 8 determines that there is no gas in the surrounding area and does not issue an alarm.

In the gas detection after T1, the gas concentration exceeds the predetermined gas concentration. Therefore, the control circuit unit 8 determines that there is a gas in the surroundings and starts a gas leak alarm (voice alarm / alarm display).

  At this time, as in the first and second embodiments, the battery voltage measuring unit 8a of the control circuit unit 8 reads the battery voltage value during the sound alarm. In the third embodiment, the read battery voltage value is recorded in the storage unit 8c (RAM) inside the control circuit unit 8, and the battery voltage data is temporarily stored.

When the audio alarm is started, first, the control circuit unit 8 reads the battery voltage value V1 at the first audio alarm and records it in the storage unit 8c (T1).
Further, when the voice alarm continues, the battery voltage measurement unit 8a of the control circuit unit 8 reads the battery voltage value every five voice alarms. For example, the second battery voltage value is read at the time of the sixth voice alarm, and the read battery voltage value is set to V2.

  The control circuit unit 8 calculates a difference (ΔV1 = V1−V2) between the first battery voltage value and the second battery voltage value. When ΔV1 is smaller than a predetermined value (when the change is small: for example, less than 0.05V), the voice alarm is continued as it is (T3).

  After that, at the time of the fifth voice alarm (at the time of the eleventh voice alarm in total), the battery voltage measuring unit 8a of the control circuit unit 8 reads the battery voltage value V3 for the third time and stores it in the storage unit 8c. Record.

  Then, the control circuit unit 8 calculates a difference (ΔV2 = V2−V3) between the second battery voltage value and the third battery voltage value. Here, when ΔV2 is larger than a predetermined value (when the change is large: 0.05 V or more, for example), the frequency of voice alarm notification is changed (T4), and the frequency of subsequent voice alarms is halved. And

Thereafter, as described above, the battery-type alarm device of the present invention performs a process of comparing the battery voltage values performed at the time of a predetermined number of voice alarms and changing the notification frequency of the voice alarms according to the difference.
The above is the description of the time chart of the sound alarm generation of the battery type alarm device of the third embodiment.

[Effect of the third embodiment]
Thus, according to the third embodiment of the present invention, the following effects can be achieved.
Normally, when the battery reaches the end of discharge, the internal resistance rapidly increases, and the battery voltage decreases rapidly under a large current discharge condition such as a voice alarm.

  However, in the third embodiment, by comparing the read battery voltages, a change in the battery voltage value is captured, and the notification frequency of the voice alarm is changed accordingly. Therefore, the battery type alarm device of the present invention accurately detects a battery voltage drop at the end of discharge, and can continuously issue a sound alarm when an abnormality such as a gas leak is detected after a battery voltage drop warning. Time can be made longer than before.

[About the first voltage value and the second voltage value]
In the above embodiment, the first voltage value is set to a voltage value higher than the voltage at which the device cannot operate, and the second voltage value is set to a voltage value higher than that. However, the present invention is not limited to this.

  For example, at the end of discharge of the battery (when 90% battery is used), the internal resistance of the battery rises, so that the battery voltage is greatly reduced due to the voice alarm. For this reason, it is necessary to set a large difference between the first voltage value and the second voltage value, and the variation becomes large.

Therefore, the battery voltage can be measured at the timing when T1 is reached (the state immediately before the alarm is issued in FIG. 2), and the measured value at this time can be set as the first voltage value.
As a result, the determination conditions for the first voltage value and the second voltage value can be set to the same light load state (the state where the current consumption is minimum when no sound alarm is issued), so that the first voltage value and The second voltage value can be detected.

[Relationship between low battery voltage warning, voice alarm suspension and notification frequency change]
The above-described embodiment can be applied even in a state after a battery voltage drop warning or at a normal time.

  For example, by setting the first voltage value to be higher than the voltage value of the battery voltage drop warning (battery voltage drop detection voltage <predetermined first voltage), the voice alarm can be stopped or stopped at the stage before the battery voltage drop warning. By changing the notification frequency, battery consumption can be more appropriately suppressed.

[Changing the frequency of voice alarm notifications]
In the above embodiment, when changing the notification frequency of the voice alarm, the difference between the battery voltage value measured at a predetermined number of times and the battery voltage value measured at the next time is compared with a reference value. Although the notification frequency is changed, it is not limited to this.

  For example, the battery-type alarm device according to the present invention calculates a ratio between a battery voltage value measured a predetermined number of times and a battery voltage value measured the next time, and the ratio is larger than a reference ratio. It is also possible to control to change the notification frequency of the voice alarm.

1 Gas Sensor 2 Heater Resistance 3 Sensor Resistance 4 Load Resistance 5 Battery Unit 6 SW1
7 SW7
8 Control circuit unit 8a Battery voltage measuring unit 8b Counting unit 8c Storage unit 9 Alarm unit 10 Alarm sound output unit 11 Alarm display unit 12 External alarm output unit 13 Ambient temperature detection unit 14 Pseudo load 15 SW3
16 Power supply circuit

Claims (13)

It detects least one detection target, a detection unit for outputting the converted level of the electric signal of the detection level,
And determining the control unit whether the level of the detection unit before Symbol electrical signal output exceeds the threshold value of the Jo Tokoro,
When it is determined that the level of the previous SL electrical signal exceeds a threshold value of the Jo Tokoro by the control unit, an alarm unit for output the alarm corresponding to the detection target,
A battery-type alarm device comprising a battery for supplying operating power to the detection unit, the control unit, and the alarm unit,
Furthermore, a battery voltage measurement unit for measuring the voltage value of the battery is provided,
When the alarm is output by the alarm unit,
Wherein the control unit, the battery voltage measurement section stops the output of the alarm unit audio alarm when measured voltage value equal to or smaller than the first voltage value of the predetermined, then the battery voltage measuring unit is pre Symbol first A battery-type alarm device that outputs the sound alarm when a voltage value exceeding the voltage value is measured. It detects least one detection target, a detection unit for outputting the converted level of the electric signal of the detection level,
And determining the control unit whether the level of the detection unit before Symbol electrical signal output exceeds the threshold value of the Jo Tokoro,
When it is determined that the level of the previous SL electrical signal exceeds a threshold value of the Jo Tokoro by the control unit, an alarm unit for output the alarm corresponding to the detection target,
A battery-type alarm device comprising a battery for supplying operating power to the detection unit, the control unit, and the alarm unit,
Furthermore, a battery voltage measurement unit for measuring the voltage value of the battery is provided,
When the alarm is output by the alarm unit,
When the battery voltage measuring unit measures a voltage value equal to or lower than a predetermined first voltage value, the control unit stops outputting an audio alarm of the alarm unit, and then the battery voltage measuring unit is configured to output the first voltage. battery-powered alarm device, wherein said possible to perform the output of the audio alarm when the measured high predetermined second voltage value or voltage value than a value. It detects least one detection target, a detection unit for outputting the converted level of the electric signal of the detection level,
And determining the control unit whether the level of the detection unit before Symbol electrical signal output exceeds the threshold value of the Jo Tokoro,
When it is determined that the level of the previous SL electrical signal exceeds a threshold value of the Jo Tokoro by the control unit, an alarm unit for output the alarm corresponding to the detection target,
A battery-type alarm device comprising a battery for supplying operating power to the detection unit, the control unit, and the alarm unit,
Furthermore, a battery voltage measurement unit for measuring the voltage value of the battery is provided,
When the alarm is output by the alarm unit,
Wherein the control unit, the battery voltage measurement section stops the output of the alarm unit audio alarm when measured voltage value equal to or smaller than the first voltage value of the predetermined, then the battery voltage measuring unit is pre Symbol first A battery-type alarm device that causes the sound alarm to be output when a predetermined time has elapsed even when a voltage value greater than the voltage value is not measured. It detects least one detection target, a detection unit for outputting the converted level of the electric signal of the detection level,
And determining the control unit whether the level of the detection unit before Symbol electrical signal output exceeds the threshold value of the Jo Tokoro,
When it is determined that the level of the previous SL electrical signal exceeds a threshold value of the Jo Tokoro by the control unit, an alarm unit for output the alarm corresponding to the detection target,
A battery-type alarm device comprising a battery for supplying operating power to the detection unit, the control unit, and the alarm unit,
Furthermore, a battery voltage measurement unit for measuring the voltage value of the battery is provided,
When the alarm is output by the alarm unit,
When the battery voltage measurement unit measures a voltage value equal to or lower than a predetermined first voltage value, the control unit stops the output of a sound alarm of the alarm unit, and the battery voltage measurement unit determines from the first voltage value. wherein to perform the output of the audio alarm when the measured high predetermined second voltage value or voltage value,
After discontinuation of the output of the audio alarm, even when the battery voltage measuring unit does not measure a voltage value equal to or greater than the second voltage value, that causes the output of the audio alarm when a predetermined time has elapsed Battery operated alarm device. The battery-type alarm device according to claim 3 or 4,
The battery-type alarm device characterized in that the voice alarm pattern output when the predetermined time has elapsed has the least current consumption. A detection unit that detects at least one detection target, converts the detection level into an electric signal level, and outputs the electric signal level;
A control unit for determining whether or not the level of the electrical signal output by the detection unit exceeds a predetermined threshold;
An alarm unit that outputs an alarm corresponding to the detection target when the control unit determines that the level of the electrical signal exceeds a predetermined threshold;
A battery-type alarm device comprising a battery for supplying operating power to the detection unit, the control unit, and the alarm unit,
Furthermore, a battery voltage measurement unit for measuring the voltage value of the battery is provided,
When the alarm is output by the alarm unit,
The battery voltage measuring unit measures the voltage value of the battery every predetermined number of output times of an audio alarm,
The control unit compares the voltage value measured at the Nth time with the voltage value measured at the (N + 1) th time, and when the difference is larger than a predetermined reference value, the subsequent output frequency of the voice alarm is determined. A battery-powered alarm characterized by decreasing. A detection unit that detects at least one detection target, converts the detection level into an electric signal level, and outputs the electric signal level;
A control unit for determining whether or not the level of the electrical signal output by the detection unit exceeds a predetermined threshold;
An alarm unit that outputs an alarm corresponding to the detection target when the control unit determines that the level of the electrical signal exceeds a predetermined threshold;
A battery-type alarm device comprising a battery for supplying operating power to the detection unit, the control unit, and the alarm unit,
Furthermore, a battery voltage measurement unit for measuring the voltage value of the battery is provided,
When the alarm is output by the alarm unit,
The battery voltage measuring unit measures the voltage value of the battery every predetermined number of output times of an audio alarm,
The control unit compares the voltage value measured at the Nth time with the voltage value measured at the (N + 1) th time, and when the ratio is larger than a predetermined reference ratio, the output frequency of the subsequent voice alarm is determined. A battery-powered alarm characterized by decreasing. The battery-powered alarm device according to any one of claims 1 to 7,
The alarm unit starts the audio alarm and alarm display based on the output of the alarm,
The battery-type alarm device, wherein the alarm display is continuously performed even while the output of the voice alarm is stopped or the output frequency is reduced. A detection unit that detects at least one detection target, converts the detection level into an electric signal level, and outputs the electric signal level;
A control unit for determining whether or not the level of the electrical signal output by the detection unit exceeds a predetermined threshold;
An alarm unit that outputs an alarm corresponding to the detection target when the control unit determines that the level of the electrical signal exceeds a predetermined threshold;
A battery-type alarm device comprising a battery for supplying operating power to the detection unit, the control unit, and the alarm unit,
Furthermore, a battery voltage measurement unit for measuring the voltage value of the battery is provided,
The control unit stores in advance the output frequency of an audio alarm that is output for each predetermined range of voltage values,
When the alarm unit outputs the audio alarm and alarm display based on the alarm,
For the audio alarm, the control unit compares the voltage value measured by the battery voltage measurement unit with the voltage value stored in advance for each predetermined range, and outputs the voltage value according to each. A battery-powered alarm. The battery-type alarm device according to claim 9,
The battery is characterized in that the output frequency of the sound alarm for each predetermined range of the voltage value stored in advance is set so that the output frequency decreases as the voltage value becomes a small value. Type alarm. The battery type alarm device according to claim 9 or 10,
The battery is characterized in that the output frequency of the sound alarm for each predetermined range of the voltage value stored in advance is set to be output at least once every detection period of the detection unit. Type alarm. The battery type alarm device according to any one of claims 1 to 11,
A pseudo load unit that is connected in parallel with the battery and that receives a command from the control unit and flows a current substantially equal to a combined maximum current value flowing from the battery to the detection unit, the control unit, and the alarm unit;
The battery voltage measuring unit is configured to measure a voltage value of the battery when a current is flowing through the pseudo load unit in a state where the alarm is not output by the alarm unit. The battery-type alarm device according to any one of claims 1 to 12,
The battery voltage measuring unit includes a characterized by measuring the voltage value of the battery in the most power consumption increases timing of one of the output of the audio alarm in a state where the alarm is output by the alarm unit Battery operated alarm.