JPS6146599A - Emergency alarm - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention provides detection information from a detector installed inside a dwelling unit for detecting abnormal conditions such as fire or gas leakage to an alarm installed outside the dwelling unit. The present invention relates to an abnormal condition alarm device that transmits wirelessly.

(Prior Art) The inventors of the present application repeatedly transmit detection information using radio waves from a transmitter for a certain period of time only when the detection state of an abnormal state detector such as fire or gas leak changes, and receive the detection information using radio waves. proposed an abnormal condition warning device that receives transmitted radio waves only intermittently within a preset reception time period and performs control, alerting, etc. based on this received information (Patent Application No. 59). -14025).

(Problem to be solved by the invention) By the way, in a device that uses such a wireless method, it is possible to achieve the same function as long as a constant accumulation time is always obtained from abnormal state detection to alarm without synchronizing transmission and reception. In order to do this, each time detection information is received within the reception time frame, the reception unit maintains the receivable state and receives the next detection information, and then activates the alarm based on the content of the last detection information. However, when the transmission of the final detection information from the transmitter ends, noise is generated due to the sudden loss of radio waves reaching the receiver, and due to the mixing of this noise, the final detection information data There was a risk that the code would change and cause malfunctions, and there was still room for improvement.

(Means for Solving the Problems) The present invention has been made in view of the above, and it is possible to prevent malfunctions and receive detection information without synchronizing transmission and reception, while maintaining alarms from abnormal state detection. In order to provide an abnormal state-line device that detects an abnormal state, as shown in FIG. is activated, and the first timer circuit 7 transmits a carrier wave of a predetermined frequency for a predetermined time (T, + Tg), while the information signal setting circuit 8 modulates the information signal according to the content of the discrimination from the discrimination circuit 5. The carrier wave from the carrier wave sending circuit 6 is outputted to the circuit 9 and modulated based on this information signal, and the modulation circuit 9
The second timer circuit 10 sets the transmission time of the modulated detection information from the carrier wave to be shorter than the carrier wave transmission time (<(T+)), and at least transmits only the carrier wave that remains unchanged for a predetermined period of time after the end of the transmission of the final information signal. It was designed to be sent.

(Embodiment) FIG. 1 is a block diagram showing an embodiment of a transmitter installed in a dwelling unit.

First, to explain the configuration, numeral 1 is an abnormal state detector that detects gas leaks.The power supply is 100 V AC for normal use, 6 V in the normal monitoring state, and 12 V when detecting gas leaks.

In the past, when a trouble such as a power outage is detected, a voltage signal corresponding to the detected state of Ov is output. Reference numeral 2 denotes a transmitter, which is powered by a charging power source of the steady output 6V of the abnormal state detector 1, and is activated only when the detection state of the abnormal state detector 1 changes, for example from a steady monitoring state to a gas leak detection state, or a steady state. It operates for a certain period of time when the monitoring state changes to a trouble state, and the detection information is transmitted by radio waves from the transmitting antenna 3.

Next, the internal configuration of the transmitter 2 will be explained. 4 is a power supply;
The output voltage from the abnormal state detector 1 is charged to supply power to each circuit section.

5 is a discrimination circuit, which includes a voltage comparator inside,
A normal output, a gas leak output, and a trouble output output as a voltage signal from the abnormal state detector 1 are determined and output to the carrier wave output path 6 and the information signal setting circuit 8. The carrier wave sending circuit 6 includes an oscillation circuit that oscillates at a predetermined period, and is activated when a discrimination output indicating a change in the detection state is obtained from the discrimination circuit 5, and transmits a carrier wave of a predetermined frequency to the modulation circuit. Send on 9th.

Reference numeral 7 denotes a timer circuit (first timer circuit), which starts timer operation in response to a signal output from the information signal setting circuit 8, and determines the transmission time of the carrier wave from the carrier wave transmission circuit 6 as the detected information transmission time, which will be explained later. The predetermined time (T, +
Ta) and gives the unmodulated carrier transmission time (TI) after the transmission of the last detection information is completed.

The information signal setting circuit 8 repeatedly sends out a pulse train information signal including its own address and data of the determination content to the modulation circuit 9 at predetermined intervals (T) based on the determination content from the determination circuit 5. frequency modulates the carrier wave from the carrier wave sending circuit 6 based on the information signal given from the information signal setting circuit 8, and transmits it from the transmission antenna 3.

Reference numeral 10 denotes a timer circuit (second timer circuit), which starts a timer operation in response to a signal output from the information signal setting circuit 8, and sets the modulation time of the modulation circuit 9 to a predetermined time (T,).

Figure 2 is a block diagram showing an embodiment of the receiving section installed outside the dwelling unit.

Reference numeral 11 is a receiving antenna, and reference numeral 2 is a receiver. The receiver 12 receives the transmitted radio waves from the transmitter 2, reproduces the information signal, and reproduces the information from the address indicated in the information signal and the determined content data. The detected contents are determined, and the alarm J3 alerts the alarm J3 to an abnormality such as a gas leak or trouble. In addition, the receiver 12 installed outside the residence has a built-in battery as a power source, and in order to suppress battery consumption, an intermittent reception time slot is provided, and information signals are intermittently transmitted only during this reception time slot. In other words, the transmitter's radio waves are intermittently received only during the reception frame time (T3) set after the interval time (T4) has elapsed.

The alarm 13 is also equipped with A-shaft means such as a buzzer and lamp for warning of gas leaks and troubles, and actuating means for opening and closing the solenoid valve provided at the gas main valve in the event of a gas leak.

Next, the internal configuration of the receiver 12 will be explained.

14 is a receiving circuit, which detects the transmitted radio wave received via the receiving antenna 11 and outputs an audio output corresponding to the information signal to the code processing circuit 15. [Code processing circuit] 5 shapes the waveform of the information signal as the audio output output from the receiving circuit 14, reproduces the pulse, and checks the address included in the information signal. When the address code matches the own address code, the determination content is determined. The data is decoded and a processed signal is output to the activation circuit 16 based on the decoding result. The activation circuit 16 sends out an activation signal for activating the alarm 13 based on the output from the code processing circuit 15.

On the other hand, a power supply control circuit 17 is provided as a means for setting an intermittent reception frame time (T,) in the reception circuit 14, and power is intermittently supplied to the reception circuit 14 from a power supply 18 using a battery. For example, after the pause time (T4) has elapsed, power is supplied for a predetermined time (T,), and the intermittent power supply time is set as the reception frame time (T,) in the reception circuit 14. Therefore, the receiving circuit 14#'i is only within this receiving frame time (T3).
It is possible to receive power and receive radio waves transmitted from the transmitter 2.

Further, when the code processing circuit 15 receives a signal output from the receiving circuit 14, it starts a built-in retrigger timer, and the output of this retrigger timer is sent to the power supply control circuit 17K.
Even if the receiving frame time has elapsed, the power supply voltage is maintained at the receiving circuit 14 for a certain period of time (To) determined by the retrigger timer.
and maintains a ready state for reception.

Note that the predetermined time period (To) is repeated every time a signal output is obtained from the receiving circuit 14. A battery voltage drop detection circuit 19 detects a drop in battery voltage.

Here, the period from receiving the last detection information to sending out the alarm activation signal) is determined by the IJ function for a certain period of time (T
o) is shorter than the non-modulated carrier transmission time (T8), and in order to ensure that the detection information can be received within the retention time ('I'o), the period of the information pulse train is (T,) is set longer than twice the time. Note that the determination of the last detected information is based on the retention time (
TO) is decoded by detecting an unmodulated carrier wave.

Further, the transmission time (Tt) of the information signal from the transmitter 2 is set to be longer than the interval time (T4) in the receiver 12, and the interval time (T4) is set to be sufficiently longer than the reception frame time (T3). The time (T,) is the period of the information pulse train (T,
) is set sufficiently longer than That is, “>To)
2 X Tl T, ≧'r4 >> TS >>'r.

The mutual time relationship is defined as τ.

Next, the operation of the embodiment of the present invention will be described with reference to the signal waveform diagram of each part shown in FIG.

Fig. 3 shows the signal waveform when the abnormal state detector 1 of the transmitting section detects a waste leakage. When the abnormal state detector 1 detects a waste leakage, the output voltage of the abnormal state detector 1 is It rises from 6V to 12V.

As shown in FIG. 1, the discrimination circuit 5 discriminates the gas leak detection voltage 12V from the abnormal state detector 1 and outputs a signal to the information signal setting circuit 8 and the carrier wave sending circuit 6. At the same time, the timer circuit 7 starts timer operation based on the signal output from the information signal setting circuit 8, and for a predetermined time (T, +Ts) set by the timer circuit 7, a predetermined frequency image is emitted from the carrier wave sending circuit 6. The carrier wave is output to the modulation circuit 9. Furthermore, the information signal setting circuit 8 outputs to the modulation circuit 9 an information signal that is a combination of an address indicating the transmitter 2 and data indicating a gas leak based on the determination content from the determination circuit 5. The modulation circuit 9 frequency-modulates the carrier wave from the carrier wave sending circuit 6 in accordance with the information signal from the information signal setting circuit 8, and repeatedly transmits the frequency-modulated detection information as an electric number from the transmitting antenna 3 every period (T,). Send.

On the other hand, the timer circuit 10 starts one timer operation based on the signal output from the information signal setting circuit 8, and the modulation circuit 9
The reward time is a predetermined time (Tr
) By setting the IC, the frequency-modulated information signal transmitted from the transmitter 2 is n over a predetermined time (T1).
A pulse train of information signals is repeatedly transmitted. As shown enlarged by the arrow, the pulse train of this information signal is composed of a pulse code consisting of, for example, a 12-bit address and 4-bit data.

Even if a predetermined time (TI) has elapsed since the start of the transmission of the information signal, the timer circuit 7 continues its timer operation, and after the transmission of the information signal is completed, the unmodulated carrier wave is sent to the transmitting antenna for a predetermined period of time (T8). Send from 3.

Next, the reception operation of the receiver 12 will be explained. In the receiver 12 shown in FIG. 2, the power supply control circuit 17 sets an intermittent reception frame time (T,) every predetermined time (T4), and the transmitter 2 When an information signal is transmitted over a period of time, the transmitted radio wave is received from when the reception frame time <'l''3) matches within the transmission time, and this transmitted radio wave contains n information signal pulse trains. Since the first information signal for the receiving and transmitting frame time (T, ) matches the second information signal in the case of FIG. 3, the information signal is sent to the receiving circuit 14 at this point. When the received code processing circuit 15 determines that the address matches the own address and the data of the discrimination content, the built-in lidlica timer is activated, and the power supply control circuit 17 maintains the power supply state to the receiving circuit 14 for a predetermined period of time ( To) hold.

The power supply continues to be maintained each time an information signal is received until the last information signal is received, and when the nth and last information signal is received, the code processing circuit 15
The IJ) jlga timer continues for a predetermined time (To) after receiving the final information signal.

The time set by the IJ function (To) is set shorter than the non-modulated carrier transmission time (Ti),
By continuing to receive an unmodulated carrier wave when receiving and decoding the final information pulse n, the data of the final information signal can be reliably decoded without noise being mixed into the final information signal. The detected gas leak detection information is output to the starting circuit 16. The starting circuit 16 sends an alarm IMJ signal to the alarm device 13, and sends a warning signal such as a buzzer, a lamp, etc.
And an actuating means for closing the solenoid valve provided at the gas main valve! l - Operate.

In the above embodiment, the modulation time of the modulation circuit 9 is limited to a predetermined time (T1) by the signal output from the timer circuit 10, but the timer circuit 10 is incorporated into the information signal setting circuit 8 and the modulation circuit 9 By limiting the transmission time of the information signal to a predetermined time (TI),
'r, ) may be set by prohibiting the transmission of the information signal to set the transmission time (Ts) of only the unchanging carrier wave.

In addition, although the information signal setting circuit that sets the information signal corresponding to the discrimination content from the discrimination circuit 5 is configured to set the detection data as an information signal of a coded pulse train, the sound corresponding to the detection state is registered in advance. Then, the discrimination circuit 50 may set an audio signal corresponding to the internal affairs to be determined, and transmit the information signal using the audio signal.

Furthermore, in the above embodiment, the first timer circuit 7 and the second timer circuit 10 are activated simultaneously based on the signal output from the information signal setting circuit 8, and the carrier wave from the carrier wave sending circuit 6 is immediately modulated. Although the configuration is configured to transmit the modulated information signal, the second timer circuit 10 is provided with a delay circuit that delays the modulated carrier wave by a predetermined time, for example, Ts, so that the modulation start time of the modulation circuit 9 is set by 1. It may also be configured to set a sending time.

Furthermore, in the embodiment, in order to reliably transmit tnn times the signal 4M, a plurality of information signals were transmitted within the information signal transmission time (T,) from the transmitter, but only one information signal was transmitted. It's okay. In this case, the reception time of the receiver should be constant reception instead of intermittent reception.

(Effects of the Invention) As described above, according to the present invention, when the output of the discrimination circuit that discriminates the detection state from the change in the output of the abnormal state detector is obtained, the carrier wave sending circuit is activated to generate a predetermined frequency signal. The first timer circuit transmits waves from the enemy for a predetermined period of time (T,
+Ts) transmission, and on the other hand, the information signal setting circuit outputs an information signal according to the determination content from the discrimination circuit to the modulation circuit, modulates the carrier wave from the carrier wave transmission circuit based on this information signal, and outputs the information signal from the modulation circuit. A second timer circuit sets the transmission time of the modulated information signal to be shorter than the transmission time of the carrier wave (T+), and then outputs the frequency-modulated final detected information.
After the transmission of the signal, only the rice transmission wave of the hairless wire is activated for a predetermined period of time (T8), so that a constant accumulation time can be achieved from abnormal state detection to alarm without synchronizing transmission and reception. This results in the effect that the information content of the final detected emotion can be reliably received while providing the same functionality while completely preventing malfunctions.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a transmitting section showing an embodiment of the present invention, Fig. 2 is a block diagram of a receiving section that receives the detected flavor from the transmitting section of Fig. 1, and Fig. 3 shows a diagram of each section. It is a signal waveform diagram.

Claims (1)

[Claims] Detection information from an abnormal state detector is transmitted by radio waves from a transmitter, the transmitted radio waves are received by a receiver, the information content is determined, and an alarm unit is activated based on the determination result. In the abnormal state alarm device, the transmitter includes a discriminating circuit that determines the detected state from a change in the output of the abnormal state detector, and is activated when a state discriminating signal is obtained from the discriminating circuit, and transmits a carrier wave of a predetermined frequency phenomenon. a carrier wave sending circuit that sends out a carrier wave, a first timer circuit that sets a carrier wave sending time from the carrier wave sending circuit, an information signal setting circuit that sets an information signal corresponding to the determination content from the discrimination circuit, and the carrier wave A modulation circuit that modulates a carrier wave from the transmission circuit in accordance with the information signal, and a second timer circuit that sets the transmission time of the modulated information signal from the modulation circuit to be shorter than the transmission time of the carrier wave. An abnormal state warning device characterized in that only an unmodulated carrier wave is transmitted for at least a predetermined period of time after the end of transmission of the final information signal.