JP4211030B2 - Fire alarm - Google Patents

Description

  The present invention relates to a fire alarm device, and more particularly, to an alarm sound of an abnormality monitoring result.

  Residential fire alarms often use batteries as a power source. Since the voltage of the battery drops with time, a fire alarm using this battery is provided with a voltage drop alarm circuit to monitor the voltage of the battery, and when the voltage drops to the specified value, the built-in buzzer is turned on. There are some which are made to sound and warn (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 9-54885

  In the voltage drop alarm circuit, the alarm sound for notifying the result of the abnormality monitoring (voltage drop) is an intermittent sounding buzzer sound different from the continuous sounding at the time of fire detection. In addition, there are sensors that perform a self-diagnosis of the sensor unit that detects smoke and the like by manual operation with an inspection switch, but it is also a buzzer sound that informs the monitoring result. For this reason, it is difficult to distinguish this buzzer sound from the buzzer sound of other home appliances. Also, in the buzzer sound, it was difficult to distinguish what it meant if the sound at the time of fire detection, the sound at the time of voltage drop, etc. were not understood in advance. This was particularly noticeable for the elderly.

  The technical problem of the present invention is to make it possible to distinguish the result of abnormality monitoring including self-diagnosis of the sensor unit from the buzzer sound of other home appliances, etc., and to convey it in an easy-to-understand manner.

(1) A fire alarm device according to the present invention automatically performs abnormality monitoring including a sensor unit for detecting smoke, heat or flame, a speaker, a test switch, and self-diagnosis of the sensor unit, and monitors the abnormality. If the result is abnormal, and supplies power to the speech synthesis circuit by turning on the switch circuit, via the voice synthesis circuit, an audio and alarm sound indicating that the abnormality is outputted by the speaker, output after a control means for Ru to stop the supply of power off to the speech synthesis circuit said switching circuit, wherein when said abnormality monitoring result is abnormal, that is the first in the abnormality the voice output in duplicate from the speaker, then, causes output the alarm sound from the speaker to the first predetermined time has elapsed, the first long second predetermined time than the predetermined time In A voice indicating the serial is abnormal is output twice from the speaker, and when the test switch is operated, is the voice of the effect that the an abnormality performs processing to output one from the speaker.
(2) In the fire alarm device according to the present invention, when the control means performs power supply voltage monitoring as the abnormality monitoring, and the power supply voltage monitoring is performed and a power supply voltage drop is detected, the voltage drop is being detected. Set the flag and then monitor the power supply voltage continuously for a predetermined time to detect a power supply voltage drop, or monitor the power supply voltage again and detect a power supply voltage drop after the predetermined time has elapsed, then set the voltage drop confirmation flag The control means performs the processing when the voltage drop detection flag is set when the test switch is operated before the predetermined time elapses. Is output from the speaker.

(1) In the fire alarm device according to the present invention, the self-diagnosis of the sensor unit is automatically performed, and the abnormality monitoring result is output by voice. In the case of the conventional buzzer sound, it has been difficult for the elderly and the like to distinguish from the buzzer sound of other household appliances, but in the present invention, since it is output by voice, it is easy to understand. In addition, when the abnormality monitoring result is abnormal, a sound indicating abnormality is output, so that it is easy to understand whether it is normal or abnormal.
Moreover, in the fire alarm device according to the present invention, if the sound output is continued, the power consumption is large and the power supply voltage is significantly reduced. Therefore, the alarm sound is output during the sound output as well as the intermittent sound. In other words, when the abnormality monitoring result is abnormal, an alarm sound is output in a short cycle so that the resident can know that the abnormality monitoring result is abnormal, and longer than the period of the alarm sound. Since the sound of abnormality in the cycle is output to make sure that the resident is aware that the abnormality monitoring result is abnormal, the power consumption is reduced and the power supply voltage drop is suppressed. The output time of the abnormality monitoring result can be maximized.
Moreover, since the abnormal sound output at the time of monitoring result output is repeated twice , the resident can surely recognize the sound content with respect to the unexpected sound output .
Furthermore, in the fire alarm device according to the present invention, when the resident notices that the abnormality monitoring result is abnormal with a buzzer sound, a sound indicating abnormality is output by operating the test switch. Therefore, the resident can quickly and surely know that the abnormality monitoring result is abnormal.
( 2 ) In the fire alarm device according to the present invention, when the test switch is operated before the predetermined time elapses, if a drop in the power supply voltage is detected, a battery exhaustion alarm is output. Even before the elapse of time, it is possible to confirm whether the power supply voltage has dropped.

Embodiment 1 FIG.
FIG. 1 is a block diagram showing the configuration of a fire alarm device according to Embodiment 1 of the present invention, and FIGS. 2 to 7 are flowcharts showing the operation thereof.

  In the figure, 1 is a power source for driving various circuits and devices, for example, a 6V battery, 2 is a power supply monitoring circuit that monitors the voltage of the battery 1, and 3 is a power supply monitoring circuit 2 that is closed when the power supply 1 is monitored. The power supply switch circuit 4 is a constant voltage circuit, and has a function of supplying a constant voltage (for example, 3 V) that does not vary depending on the voltage of the battery 1 to each of the circuits from here on. A thermal fire detection unit (sensor unit) 5 includes a thermistor 6 and a resistor 7. The fire detection unit 5 is also used for disconnection detection (sensor unit self-diagnosis). Incidentally, there are two types of thermistors 6: a type in which the resistance value increases as the temperature a rises and a type in which the resistance value decreases as the temperature b increases. Here, the b type is used, and the b type thermistor. If the detected voltage value is equal to or greater than a fire detection threshold (for example, 2 V), it is determined that a fire has occurred.

  Reference numeral 8 denotes a test switch in which a current limiting resistor 9 is connected in series. When the switch 8 is turned on, an abnormality monitoring result is output from the speaker 11, and in the case of a fire, a fire phrase (fire sound) ) Is stopped for a predetermined time, for example, 5 minutes.

  Reference numeral 12 denotes a microcomputer (hereinafter referred to as a microcomputer), which includes a storage unit 13 and a timer unit 14 for performing various processing operations. A voice synthesis circuit 15 has a function of outputting voices of various phrases from the speaker 11 in accordance with instructions from the microcomputer 12. Reference numeral 16 denotes a switch circuit for supplying power to the voice synthesis circuit 15 that is closed when the voice synthesis circuit 15 outputs voice.

  More specifically, in the storage unit 13 of the microcomputer 12, a fire flag 13a that is set when a fire is detected, a disconnection flag 13b that is set when a disconnection is detected, and the voltage of the battery 1 is equal to or lower than a predetermined voltage value. For example, a voltage drop detection flag 13c that is set when it is detected that the voltage has dropped to 5 V or less, and that the voltage of the battery 1 has been lowered to a predetermined voltage value or less, for example, 5 V or less, is detected for a predetermined time, for example, 5 hours. The voltage drop confirmation flag 13d that is set when the fire is detected, and the fire sound stop flag 13e that is set when the switch 8 is detected to be on when a fire is detected are stored. Based on the sound output command signal LM for outputting a sound to the speech synthesis circuit 15, the selection signal L1, L2, L3 of various phrases It is adapted to output with a Re of the selection signal. Here, the selection signal L1 is a signal for selecting a fire sound “Hugh, Hugh, Hugh, Fire. Fire,” and the selection signal L2 is an abnormal sound “flowing every hour when the thermistor is disconnected or when the battery voltage drops”. The alarm signal is abnormal. Replace it. The selection signal L3 is a signal for selecting a beep that sounds every 40 seconds when the thermistor is disconnected or when the battery voltage drops. The signal LB is a signal (back signal) notifying the microcomputer 12 that the commanded selection sound has been output from the voice synthesis circuit 15. At the time of this sound output, the microcomputer 12 turns on the switch circuit 16 to supply power to the speech synthesis circuit 15, and after outputting the sound, turns off the switch circuit 16 to stop the power supply to the speech synthesis circuit 15. , Reducing power consumption. Similarly, during the battery voltage drop monitoring process, the microcomputer 12 turns on the switch circuit 3 to supply power to the power supply monitoring circuit 2 and inputs the voltage of the battery 1 from the power supply monitoring circuit 2. The power consumption is reduced by turning off and stopping the power supply to the power monitoring circuit 2. The power supply monitoring circuit 2 and the microcomputer 12 correspond to the control means of the present invention.

  Next, the operation of the fire alarm device of the present embodiment will be described with reference to FIG. 1 based on FIGS. First, in FIG. 2 showing the main flow chart, when the battery 1 is set (loaded) and the power is turned on, all the flags 13a to 13e of the microcomputer 12 in FIG. The symbol notation is omitted) (step 1), and all counters of each timer of the timer unit 14 are cleared (step 2). Next, in step 3, a switch input determination process is performed to determine whether or not there is an input from the switch 8. In step 4, a fire monitoring process is performed to determine whether or not a fire has occurred. A disconnection monitoring process for determining whether or not there is a disconnection is performed, a battery voltage drop monitoring process is performed in step 6, and then a monitoring result output process is performed in step 7, and then the switch input in step 3 is performed. Return to determination processing. And the process of step 3-step 7 is repeated.

In the switch input determination process (step 3), as shown in FIG. 3, first, it is determined whether or not there is an input from the switch 8 (whether or not the switch 8 is closed) (step 311). (That is, proceed to the fire monitoring process in step 4 of the main flowchart of FIG. 2).
If it is determined in step 311 that there is an input from the switch 8, then it is checked whether or not the fire flag is set (step 312). If the fire flag is set, a fire sound indicating a fire state is displayed. Since the phrase is output, a fire sound stop flag for stopping the fire sound phrase for 5 minutes, for example, is set (step 313), and the process is terminated (proceed to step 4 in the main flowchart).
If it is determined in step 312 that the fire flag is not set, then it is checked whether or not the disconnection flag is set (step 314). If the disconnection flag is set, the abnormal voice “alarm” is set. The device is abnormal. Please replace it. ”The processing for outputting once is performed (step 315), and the processing ends (proceed to step 4 of the main flowchart).
If it is determined in step 314 that the disconnection flag is not set, then it is checked whether or not the voltage drop confirmation flag is set (step 316). If the voltage drop confirmation flag is set, step The process jumps to 315 to perform processing for outputting an abnormal sound “Alarm is abnormal. Please replace.” Once, and the processing ends (proceed to Step 4 in the main flowchart).
If it is determined in step 316 that the voltage drop confirmation flag has not been set, then it is checked whether or not the voltage drop detection flag is set (step 317), and the voltage drop detection flag is set. If so, the process jumps to step 315 to perform processing for outputting the abnormal sound “alarm is abnormal. Please replace.” Once, and the processing is terminated (proceed to step 4 in the main flowchart).
If it is determined in step 317 that the voltage drop detection flag is not set, it is determined that the fire alarm is in a normal state, and the fire sound “Hugh, Hugh, After processing for outputting “Hugh, fire. Fire is fired” once (step 318), the process returns to step 311. That is, in the case of normality, the normality can be notified as many times as there is an input from the switch 8. Therefore, if it is determined that the fire alarm is in a normal state instead of a fire state, a sound indicating that it is normal is output, and it can be confirmed that the sound is normal by the sound output, so that it is determined as an abnormal state. Then, since a sound indicating abnormality is output, it can be confirmed that the sound is abnormal by the sound output. In addition, you may vary the audio | voice phrase which shows abnormality for every abnormality. Note that the abnormal voice output requires that any one of the disconnection flag, the voltage drop confirmation flag, and the voltage drop detection flag is set, but if you do not want to output the abnormal voice output before the power supply voltage drop is confirmed The condition of the voltage drop detection flag (step 317) may be deleted.

As shown in FIG. 4, the fire monitoring process (step 4) first takes the voltage value of the thermistor 6 and compares this detected voltage value with a fire detection threshold (eg, 2V), that is, the detected voltage value. It is determined whether or not a fire has occurred (step 411) by checking whether or not the fire has exceeded the fire detection threshold (2V). If it is determined that no fire has occurred, the fire flag is cleared. Then, the 5-minute timer for the fire sound stop flag is cleared (step 413), the fire sound stop flag is also cleared (step 414), and the process ends (that is, in the main flowchart of FIG. 2). Proceed with disconnection monitoring processing in step 5).
If it is determined in step 411 that a fire has occurred, after setting the fire flag (step 415), it is checked whether the fire sound stop flag is set (step 416) and the fire sound is stopped. If the flag is not set, the process jumps to step 413, and if it is determined in step 416 that the fire sound stop flag is set, the fire sound should not be sounded, so the timer is counted for 5 minutes ( Step 417) Next, it is checked whether or not 5 minutes have passed (Step 418), and if 5 minutes have not passed, the processing is terminated (Proceed to Step 5 of the main flowchart).
If it is determined in step 418 that 5 minutes have elapsed, it is necessary to be able to emit a fire sound, so the process proceeds to step 413, the timer is cleared for 5 minutes, and the fire sound stop flag is cleared in step 414. Then, the process ends (proceed to step 5 of the main flowchart).

As shown in FIG. 5, the disconnection monitoring process (step 5) first checks whether or not the fire flag is set (step 511), and if the fire flag is set, the fire detection is prioritized. The process ends (that is, the battery voltage drop monitoring process in step 6 of the main flowchart of FIG. 2 is performed).
If it is determined in step 511 that the fire flag is not set, it is next determined whether or not the voltage value of the thermistor 6 is taken in and disconnected (step 512). That is, it is determined whether or not the output of the thermistor 6 is 0V, and it is determined whether or not it is disconnected. If it is not disconnected, the disconnection flag is cleared (step 513), and the process ends (steps of the main flowchart). 6).
If it is determined in step 512 that the circuit is disconnected, a disconnection flag is set (step 514), and the process ends (proceed to step 6 in the main flowchart).

As shown in FIG. 6, the battery voltage drop monitoring process (step 6) first checks whether or not the fire flag is set (step 611). If the fire flag is set, the disconnection monitoring process described above is performed. Similarly, since fire detection has priority, the processing is terminated (that is, the monitoring result output processing in step 7 of the main flowchart in FIG. 2 is performed).
On the other hand, if it is determined in step 611 that the fire flag is not set, whether or not the battery voltage drop confirmation flag is set next is checked (step 612), and the battery voltage drop confirmation flag is set. For example, since the battery voltage is held in that state, the subsequent battery voltage drop monitoring process is not performed, and the process ends (proceed to step 7 in the main flowchart).
If it is determined in step 612 that the battery voltage decrease confirmation flag is not set, whether or not the voltage of the battery 1 has decreased to a predetermined voltage value or less (in this case, a decrease level or less, for example, 5 V) or less. (Step 613) If it is not lower than 5V, it is normal, so the 5-hour timer for the battery voltage drop confirmation flag is cleared (Step 614), then the voltage drop detection flag is cleared. (Step 615), the process is terminated (Proceed to Step 7 of the main flowchart).
If it is determined in step 613 that the voltage of the battery 1 has dropped to 5 V or less, the voltage drop detection flag is set (step 616), and then the first or second monitoring process after turning on the power. Whether the monitoring process is the third or subsequent monitoring process (step 617), and if it is the first or second monitoring process, it is checked whether a voltage drop is detected twice consecutively (step 618). If it is the first monitoring process or the like, the process ends (proceed to step 7 in the main flowchart).
If it is determined in step 618 that a voltage drop has been detected twice consecutively, the battery voltage drop confirmation flag is set (step 619), and the process ends (proceeds to step 7 in the main flowchart).
If it is determined in step 617 that the monitoring process is not the first or second monitoring process after the power is turned on but the third and subsequent monitoring processes, the 5-hour timer starts counting (step 620). Next, it is checked whether or not 5 hours have passed (step 621). If 5 hours have not passed, the process is terminated (proceeds to step 7 in the main flowchart). The voltage drop confirmation flag is set and the process ends.
That is, there is a case where a defective battery is attached to the fire alarm device itself and the battery voltage is lowered from the beginning. In that case, since an alarm is issued after 5 hours, fire detection may not be performed normally during that time. Therefore, it is desirable that a voltage drop can be detected immediately if the product is defective at first. Steps 617 to 619 described above are provided so that such a defective product can be checked in the first stage.

As shown in FIG. 7, the monitoring result output process (step 7) first checks whether or not the fire flag is set (step 711). If the fire flag is set, then the fire sound stop flag is set. Check if it is set (step 712), and if the fire sound stop flag is not set, a fire has occurred, so the fire sound “Hugh, Hugh, Hugh, Fire. Then, the process ends (that is, the process returns to the switch input determination process in step 3 of the main flowchart of FIG. 2).
If it is determined in step 711 that the fire flag is not set, the process proceeds to step 714.
Further, even if it is determined in step 711 that the fire flag is set, even if it is determined in step 712 that the fire sound stop flag is set, the process proceeds to step 714.
In step 714, it is determined whether or not the disconnection flag is set. If it is determined in step 714 that the disconnection flag is not set, then it is checked whether or not the battery voltage drop confirmation flag is set (step 715). If the battery voltage drop confirmation flag is not set as well. Then, the process ends (returns to step 3 of the main flowchart).
If it is determined in step 714 that the disconnection flag is set, or if it is determined in step 715 that the battery voltage decrease confirmation flag is set, the process proceeds to step 716.
In step 716, it is determined whether or not counting of a one-hour timer (for abnormal sound output), which is an example of a second predetermined time, is started. If it is determined in step 716 that the 1-hour timer has not started, processing is performed to output an abnormal sound “alarm is abnormal. Replace it” twice (step 717). . That is, after inputting the sound output command signal LM and the selection signal L2 from the microcomputer 12 to the voice synthesis circuit 15 and outputting the abnormal sound once, after receiving the back signal LB, the microcomputer 12 again at intervals of 3 seconds, for example. The voice output command signal LM and the selection signal L2 are input to the voice synthesis circuit 15 to output abnormal voice. Next, the timer is counted for 1 hour (step 718).
On the other hand, if it is determined in step 716 that the one-hour timer has been started, the process jumps to step 718 to continue the one-hour timer. Next, it is checked whether or not 1 hour has passed (step 719). If 1 hour has not passed, counting of a 40 second timer (for alarm sound output) which is an example of the first predetermined time is started (step 720). ). Next, it is checked whether or not 40 seconds have passed (step 721). If 40 seconds have not passed, the process is terminated (return to step 3 in the main flowchart), and if 40 seconds have passed, the counter of the timer for 40 seconds is set. After clearing (step 722), an alarm sound “beep” is output (step 723), and the process is terminated (returning to step 3 of the main flowchart).
If it is determined in step 719 that one hour has elapsed, the abnormal sound “Alarm is abnormal. Replace it” is output twice as in step 717 (step 724). The counter of the one hour timer is cleared (step 725), and the process ends (returns to step 3 of the main flowchart).

  As described above, in the fire alarm device according to the first embodiment, the thermistor 6 serving as the sensor unit automatically performs the self-diagnosis and outputs the abnormality monitoring result by voice. The buzzer sound can be clearly distinguished. In addition, when the abnormality monitoring result is abnormal, a sound indicating abnormality is output, so that it is easy to understand whether it is normal or abnormal.

  Further, since the sound corresponding to the abnormality monitoring result is output when the switch 8 for performing the test is operated, that is, when the abnormality monitoring result is abnormal, the sound indicating that it is abnormal. Since the operator (for example, a resident) wants to grasp the abnormality monitoring result, the operator can surely know the result and can also know by voice, so that it is easy to understand. .

  Further, if the audio output is continued, the power consumption is large and the power supply voltage is drastically reduced. Therefore, the abnormal audio output is sounded intermittently every second predetermined time, and every first predetermined time during the audio output. The alarm sound “beep”, which consumes less power than voice output, is output intermittently every 40 seconds. In other words, when the abnormality monitoring result is abnormal, after outputting the sound indicating the abnormality first, the alarm sound is output with a short period, and the period longer than the period of the alarm sound (40 seconds) ( 1 hour), a sound indicating that the abnormality is abnormal is output, so that the resident can surely know that the abnormality monitoring result is abnormal, and the power supply voltage can be reduced by reducing power consumption. . And the output time of an abnormality monitoring result can be lengthened to the maximum. This reduction in power consumption is further reduced by intermittent sounding of sound output and intermittent sounding of alarm sound between sound outputs.

In addition, when the resident notices that the abnormality monitoring result is abnormal with a buzzer sound, the test switch 8 is operated to output a sound indicating abnormality. Residents can quickly and surely know that is abnormal.
Note that the abnormal sound output at the time of monitoring result output is repeated twice because the resident cannot recognize the sound content in response to the unexpected sound output if only once. By doing so, the resident can surely recognize the audio content.
Moreover, in the fire alarm device of this Embodiment 1, another effect as shown below can also be show | played.

  That is, when a power supply voltage drop is detected by monitoring the power supply voltage, a battery exhaustion alarm is output after a predetermined time (for example, 5 hours) has elapsed since the detection point. Even if the power supply voltage decreases from early morning to early morning and a power supply voltage drop is detected, the battery exhaustion alarm is output after a predetermined time has elapsed. Therefore, the output of the battery exhaustion warning from night to early morning is reduced, and the power supply voltage is monitored from night to early morning when the power supply voltage is likely to drop, so that the power supply voltage drop can be detected early. Note that the predetermined voltage value for issuing a battery exhaustion alarm is a value (for example, 5 V) that enables fire detection for a predetermined time after the alarm, and delays the alarm until, for example, morning or daytime after the predetermined time has elapsed. Does not affect fire detection.

  In addition, when a power supply voltage drop is detected by monitoring the power supply voltage, if a power supply voltage drop is further detected for a predetermined time (for example, 5 hours), a battery exhaustion alarm is output. The battery exhaustion alarm is not output due to the decrease, and the reliability can be improved.

  In addition, when the test switch 8 is operated before the predetermined time has elapsed, a battery exhaustion alarm is output when a drop in the power supply voltage is detected. Therefore, even before the predetermined time (for example, 5 hours) has elapsed, It is possible to check whether the voltage has dropped.

  Also, the power supply voltage is monitored when the fire alarm is started up, and if a power supply voltage drop is detected multiple times in succession, a battery exhaustion alarm is output immediately. ), A battery exhaustion alarm can be output without delaying for a predetermined time, and a defective power supply (battery) can be quickly found from the beginning. Therefore, it is possible to avoid the fear that the fire alarm does not operate normally within a predetermined delay time (for example, 5 hours).

In addition, after the battery exhaustion alarm is output after the lapse of a predetermined time, power supply voltage monitoring is not performed while maintaining that the power supply voltage has dropped, so power is not supplied to the power supply monitoring circuit after that, and power consumption is reduced. The power supply voltage drop can be suppressed, and the output time of the battery exhaustion alarm can be maximized.
Note that the abnormal sound output at the time of monitoring result output is repeated twice because the resident cannot recognize the sound content for the unexpected sound output if it is only once. By doing so, the resident can surely recognize the audio content.

Embodiment 2. FIG.
FIG. 8 is a flowchart showing the battery voltage drop monitoring processing operation of the fire alarm device according to the second embodiment of the present invention, and other switch input determination processing operation, fire monitoring processing operation, disconnection monitoring processing operation, monitoring result Since output processing, hardware configuration, and the like are basically the same as those of the first embodiment, description thereof is omitted. In the description, the block diagram of FIG. 1 and the main flowchart of FIG. 2 will be referred to, and the description will focus on the differences from the battery voltage drop monitoring processing operation of FIG.

The fire alarm of the second embodiment is slightly different from that of the first embodiment in the battery voltage drop monitoring process. In the second embodiment, as shown in FIG. 8, first, it is determined whether or not the fire flag is set (step 811). If the fire flag is not set, the battery voltage drop confirmation flag is set. If the battery voltage drop confirmation flag is not set, it is checked whether the voltage drop detection flag is set (step 813). If the voltage drop detection flag is not set in step 813, it is checked whether or not the voltage of the battery 1 has dropped to a predetermined voltage value or less (in this case, a drop level or lower, for example, 5 V or lower) (step 813). 814) If it is not lower than 5V, it is normal, so the voltage drop detection flag is cleared (step 815), and the 5-hour timer for the battery voltage drop confirmation flag is cleared (step 816), The process ends (proceed to step 7 in the main flowchart).
If it is determined in step 814 that the voltage of the battery 1 has dropped to 5 V or less, the voltage drop detection flag is set (step 817), and then the first or second monitoring process after turning on the power. Whether the monitoring process is the third or subsequent monitoring process (step 818), if it is the first monitoring process or the second monitoring process, it is checked whether the voltage drop is detected twice consecutively (step 819). If it is the first monitoring process or the like, the process ends (proceed to step 7 in the main flowchart).
If it is determined in step 819 that a voltage drop has been detected twice consecutively, the battery voltage drop confirmation flag is set (step 820), and the process ends (proceeds to step 7 in the main flowchart).
If it is determined in step 813 that the voltage drop detection flag is set, then whether or not the voltage of the battery 1 is at a normal level (for example, 5.2 V or more) as a predetermined voltage value. (Step 823), if the voltage of the battery 1 is at a normal level (5.2 V or higher), the voltage drop detection flag is cleared (step 815), and the 5-hour timer for the battery voltage drop confirmation flag is further cleared. (Step 816), and the process is terminated (Proceed to Step 7 of the main flowchart).
If it is determined in step 823 that the voltage of the battery 1 is not at a normal level, the process jumps to step 818, and in step 818, the first or second monitoring process after power-on is performed, and the third or subsequent monitoring process is performed. If it is determined that there is, a 5-hour timer starts counting (step 821). Next, it is checked whether or not 5 hours have passed (step 822). If 5 hours have not passed, the process is terminated (proceeds to step 7 in the main flowchart). The voltage drop confirmation flag is set and the process ends.

  In the fire alarm device according to the second embodiment, in addition to the same operations and effects as those of the first embodiment described above, the power supply voltage is first lowered in anticipation of a rise in indoor temperature when a predetermined time (for example, 5 hours) has elapsed. A threshold value that is a predetermined voltage at the time of power supply voltage monitoring after detection is set higher than a threshold value (for example, 5 V) that is a predetermined voltage at the time of initial power supply voltage monitoring (for example, 5.2 V or more) Since monitoring is performed (in other words, a hysteresis characteristic is provided for detection of power supply voltage drop), it is possible to strictly check for defective products of the power supply (battery).

Embodiment 3 FIG.
FIG. 9 is a flowchart showing the battery voltage drop monitoring processing operation of the fire alarm device according to the third embodiment of the present invention, and other switch input determination processing operation, fire monitoring processing operation, disconnection monitoring processing operation, monitoring result Since output processing, hardware configuration, and the like are basically the same as those of the first embodiment, description thereof is omitted. In this case as well, the block diagram of FIG. 1 and the main flowchart of FIG. 2 are referred to, and the difference from the battery voltage drop monitoring processing operation of FIG. 6 will be mainly described.

The fire alarm of the third embodiment is slightly different from that of the first embodiment in the battery voltage drop monitoring process. In the third embodiment, as shown in FIG. 9, it is first checked whether or not the fire flag is set (step 911). If the fire flag is not set, the battery voltage drop confirmation flag is set. If the battery voltage drop confirmation flag is not set, it is checked whether the voltage drop detection flag is set (step 913). If the voltage drop detection flag is not set in step 913, it is checked whether or not the voltage of the battery 1 has dropped to a predetermined voltage value or lower (in this case, lower level, for example, 5V or lower) (step 913). 914) If the voltage has not decreased to 5 V or less, the process ends (proceeds to step 7 in the main flowchart).
If it is determined in step 914 that the voltage of the battery 1 has dropped to 5 V or less, the voltage drop detection flag is set (step 915), and then the first or second monitoring process after the power is turned on. Whether the monitoring process is the third or subsequent monitoring process (step 916), and if it is the first monitoring process or the second monitoring process, it is checked whether a voltage drop is detected twice consecutively (step 917). If it is the first monitoring process or the like, the process ends (proceed to step 7 in the main flowchart).
If it is determined in step 917 that a voltage drop has been detected twice consecutively, the battery voltage drop confirmation flag is set (step 918), and the process ends (proceeds to step 7 in the main flowchart).
If it is determined in step 913 that the voltage drop detection flag is set, the process proceeds to step 916. In step 916, the first or second monitoring process is not performed after the power is turned on. If it is determined that the process is being performed, the 5-hour timer for the battery voltage drop confirmation flag is started (step 919). Next, it is checked whether or not 5 hours have passed (step 920). If 5 hours have not passed, the process is terminated (proceeds to step 7 in the main flowchart), and if 5 hours have passed, the 5-hour timer is cleared. (Step 921), it is checked again whether the voltage of the battery 1 has dropped to 5 V or less (Step 922). If the voltage of the battery 1 has not dropped to 5 V or less, it is normal and the voltage drop is being detected. The flag is cleared (step 923), and the process ends (proceed to step 7 in the main flowchart).
If it is determined again in step 922 that the voltage of the battery 1 has decreased to 5 V or less, the battery voltage decrease confirmation flag is set (step 918), and the process ends (proceed to step 7 in the main flowchart). ).

  In the fire alarm device according to the third embodiment, in addition to the same operation and effect as those of the first embodiment, when the power supply voltage monitoring is detected by detecting the power supply voltage, the power alarm is continuously monitored. When the power supply voltage drop is detected again after a lapse of time (5 hours) and the power supply voltage drop is detected, a battery low warning is output, so a battery low warning is output due to a temporary power supply voltage drop. This makes it easier to ensure reliability. Also, when the power supply voltage drop is detected, the power supply voltage is not detected (judged) until the predetermined time has elapsed, so the number of times power is supplied to the power monitoring circuit is reduced, power consumption is reduced, The voltage drop can be suppressed, and the output time of the battery exhaustion alarm can be maximized.

Embodiment 4 FIG.
FIG. 10 is a flowchart showing the operation of the battery voltage drop monitoring process of the fire alarm device according to the fourth embodiment of the present invention. Other switch input determination processing operation, fire monitoring processing operation, disconnection monitoring processing operation, monitoring result Since output processing, hardware configuration, and the like are basically the same as those of the first embodiment, description thereof is omitted. In this description as well, the block diagram of FIG. 1 and the main flowchart of FIG. 2 are referred to, and the difference from the battery voltage drop monitoring processing operation of the third embodiment (FIG. 9) is mainly described. explain.

  As shown in step 122 in FIG. 10, the fire alarm device according to the fourth embodiment performs a predetermined time (for example, 5 hours) while continuing the power supply voltage monitoring when the power supply voltage monitoring is detected by detecting the power supply voltage. ) After the elapse of time, the threshold level, which is a predetermined voltage value for determining the power supply voltage drop again, is higher than the threshold value (for example, 5 V as the drop level) for determining the first power supply voltage drop (normal). The level is set to 5.2 V, for example, and the power supply voltage is monitored (in other words, the hysteresis characteristic is provided for the detection of the power supply voltage drop) in the third embodiment (FIG. 9). The other operations, that is, the operations of Step 111 to Step 123 excluding Step 122 are the same as those of Step 911 to Step 923 except for Step 922 of the aforementioned third embodiment. It is similar to the work.

  In the fire alarm device of the fourth embodiment, in addition to the same operations and effects as in the first embodiment, when a power supply voltage drop is detected by monitoring the power supply voltage, the power alarm is continuously monitored. When the power supply voltage drop is detected again after a lapse of time (5 hours) and the power supply voltage drop is detected, a battery low warning is output, so a battery low warning is output due to a temporary power supply voltage drop. This makes it easier to ensure reliability. Also, when the power supply voltage drop is detected, the power supply voltage is not detected (judged) until the predetermined time has elapsed, so the number of times power is supplied to the power monitoring circuit is reduced, power consumption is reduced, The voltage drop can be suppressed, and the output time of the battery exhaustion alarm can be maximized. Further, in anticipation of a rise in room temperature when a predetermined time (5 hours) has elapsed, a threshold value that is a predetermined voltage value at the time of power supply voltage monitoring after first detecting a power supply voltage drop is set to a predetermined value at the time of initial power supply voltage monitoring. Is set to be higher than a threshold value (for example, 5V) which is the voltage ground of (5V or more) and power supply voltage monitoring is performed (in other words, a hysteresis characteristic is provided for detection of power supply voltage drop). It is possible to strictly check for defective power supplies (batteries).

Embodiment 5 FIG.
FIG. 11 is a flowchart showing the operation of the battery voltage drop monitoring process of the fire alarm device according to the fifth embodiment of the present invention, and other switch input determination processing operation, fire monitoring processing operation, disconnection monitoring processing operation, and monitoring result. Since output processing, hardware configuration, and the like are basically the same as those of the first embodiment, description thereof is omitted. In this case as well, the block diagram of FIG. 1 and the main flowchart of FIG. 2 are referred to, and the difference from the battery voltage drop monitoring processing operation of FIG. 6 will be mainly described.

The fire alarm of the fifth embodiment is slightly different from that of the first embodiment in the battery voltage drop monitoring process. In the fifth embodiment, as shown in FIG. 11, first, it is checked whether or not the fire flag is set (step 211). If the fire flag is not set, the battery voltage drop confirmation flag is set. If the battery voltage drop confirmation flag is not set, it is checked whether the voltage drop detection flag is set (step 213). If the voltage drop detection flag is not set in step 213, it is checked whether or not the voltage of the battery 1 has fallen to a predetermined voltage value or less (in this case, a drop level or less, for example, 5 V or less) (step 213). 214) If it has not decreased to 5 V or less, the process is terminated (proceeds to step 7 in the main flowchart).
If it is determined in step 214 that the voltage of the battery 1 has dropped to 5 V or less, a voltage drop detection flag is set (step 215), and the 5-hour timer count for the battery voltage drop confirmation flag is started. (Step 216). Next, it is checked whether or not 5 hours have passed (step 217). If 5 hours have not passed, the process is terminated (proceeds to step 7 in the main flowchart), and if 5 hours have passed, the battery voltage drop confirmation flag is set. Set (step 218), the process ends (proceed to step 7 of the main flowchart).

  In the fire alarm of the fifth embodiment, in addition to the same operations and effects as the first embodiment, when the power supply voltage drop is detected by monitoring the power supply voltage, the determination of the power supply voltage drop again is not made. Without performing the power supply voltage monitoring, a battery exhaustion alarm is output after a predetermined time (5 hours) has elapsed, and the determination of the power supply voltage drop is not performed within the predetermined time. The number of times power is supplied is reduced, power consumption is reduced, power supply voltage drop can be suppressed, and the output time of a battery exhaustion alarm can be maximized.

Embodiment 6 FIG.
In addition, although the example of the fire alarm which detects a fire was demonstrated in the above-mentioned embodiment, this invention is applied similarly to what detects a flame and smoke. In the above embodiment, for example, the fire monitoring process in step 4 is performed every 3 seconds, the disconnection monitoring process in step 5 is performed every 3 seconds, and the battery voltage drop monitoring in step 6 is performed every 10 minutes. -Each monitoring process of step 6 may be intermittently performed at arbitrary time intervals.

It is a block diagram which shows the structure of the fire alarm which concerns on Embodiment 1 of this invention. 3 is a flowchart showing an overall operation of the fire alarm device according to the first embodiment. 3 is a flowchart showing a switch input determination operation of the fire alarm device according to the first embodiment. 3 is a flowchart showing a fire monitoring operation of the fire alarm device according to the first embodiment. 4 is a flowchart showing disconnection monitoring operation of the fire alarm device according to the first embodiment. 4 is a flowchart showing a battery voltage monitoring operation of the fire alarm device according to the first embodiment. 4 is a flowchart illustrating a monitoring result output operation of the fire alarm device according to the first embodiment. It is a flowchart which shows the battery voltage monitoring operation | movement of the fire alarm device which concerns on Embodiment 2 of this invention. It is a flowchart which shows the battery voltage monitoring operation | movement of the fire alarm device which concerns on Embodiment 3 of this invention. It is a flowchart which shows the battery voltage monitoring operation | movement of the fire alarm device which concerns on Embodiment 4 of this invention. It is a flowchart which shows the battery voltage monitoring operation | movement of the fire alarm which concerns on Embodiment 5 of this invention.

Explanation of symbols

2 Power supply monitoring circuit 6 Thermistor (sensor part)
11 Speaker 12 Microcomputer (control means)
15 Voice synthesis circuit 8 Switch (test switch)

Claims (2)

A sensor for detecting smoke, heat or flame;
Speakers,
A test switch,
Abnormality monitoring including self-diagnosis of the sensor unit is automatically performed, and when the abnormality monitoring result is abnormal, the switch circuit is turned on to supply power to the speech synthesis circuit, and through the speech synthesis circuit , voice and audible alarm indicating an abnormal is output by the speaker, and control means turns off Ru to stop power supply to the voice synthesizing circuit the switching circuit after the output,
Said control means, said abnormality when the monitoring result is abnormal, first the sound indicating that abnormal output in duplicate from the speaker, then the alarm sound to a first predetermined time Is output from the speaker, and each time a second predetermined time longer than the first predetermined time elapses, the sound indicating the abnormality is repeatedly output from the speaker twice, and the test switch is operated. A fire alarm device that performs a process of outputting a sound indicating the abnormality from the speaker once . The control means performs power supply voltage monitoring as the abnormality monitoring. When the power supply voltage monitoring is performed and a power supply voltage drop is detected, a voltage drop detection flag is set, and the power supply is continued for a predetermined time. When a power supply voltage drop is detected by performing voltage monitoring, or when a power supply voltage drop is detected again after a predetermined time has elapsed, a voltage drop confirmation flag is set and the above processing is performed.
In addition, when the test switch is operated before the predetermined time has elapsed and the voltage drop detection flag is set, the control means causes the speaker to output a sound indicating the abnormality. The fire alarm according to claim 1.

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