JPH021671Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention uses detection information from an abnormal condition detector installed inside a dwelling unit to detect 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 to a device.

(Prior Art) The inventors of the present application repeatedly transmit detection information corresponding to the detection state for a predetermined period of time only when the detection state of an abnormal state detector such as fire or gas leak changes by radio waves from a transmitter. The receiving unit receives the transmitted radio waves only within the reception time frame set in advance, and activates the alarm unit based on the final received information, that is, after a predetermined period of time has elapsed since the detection of the abnormal condition. We have proposed an abnormal state warning device that has the same function as always obtaining a predetermined accumulation time from abnormality detection to alarm without synchronization (Japanese Patent Application No. 14025/1982).

(Problem to be solved by the invention) When testing the operation of such a device, the abnormal condition detector is operated using test gas. In order to maintain the gas leak detection operation for the abnormal condition detector for the accumulation time (e.g. 3 minutes) that the equipment has to prevent malfunction, the test gas must be leaked continuously for 3 minutes. However, this method is uneconomical because it takes time for test workers and the like, and the amount of gas leaked for testing increases.

For this reason, if the gas leakage time is only 30 seconds, for example, the abnormal state detector activated by the test gas will immediately recover after 30 seconds and will no longer output an abnormal signal, so the transmitter will not be able to detect the abnormal signal. Instead of the detection information, the detection information of the normal signal will be transmitted, and since the storage function is activated in the receiving part even though the abnormal signal has been received for 30 seconds, the alarm part will not start, and the abnormal signal will not be activated. Subsequently, a normal signal is received, and the final reception content, that is, the reception of a normal signal is determined. Therefore, there was a problem in that the receiving section could not perform test operations.

(Means for solving the problems) This invention was made in view of the above problems.
In order to avoid using a large amount of test gas, to shorten the work time of the operator, and to ensure that the entire system including the abnormal condition detector can be tested, the detection from the abnormal condition detector 1 is A transmitter that discriminates a signal and, when a state change is determined, activates a timer circuit 9 and drives a transmitting means for a predetermined transmission time T1 to repeatedly transmit detection information corresponding to the determined content by radio waves; In an abnormal state alarm device that receives repeated transmission radio waves and activates an alarm 17 based on the final detection information, when transmitting a test signal to the transmitter 1, the transmitting means transmits by operating the test switch SW. A holding means 7 holds the operation for a predetermined time T1 determined by a timer circuit 9, and a holding means 7 holds the operation for a predetermined time T5 after the holding means 7 is restored.
A reactivation means 8 is provided for reactivating the timer circuit 9 after the test signal has passed, and a time frame for transmitting a normal signal is set after the transmission of the test signal is completed.

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

First, to explain the configuration, 1 is an abnormal condition detector, which is powered by commercial AC 100V and under normal monitoring status.
It outputs a voltage signal according to the detection state, which is 6V and 12V when detecting a gas leak. Reference numeral 2 denotes a transmitter, which is operated by a power source obtained by charging the steady output of 6V from the abnormal state detector 1, and is connected to the abnormal state detector 1 as shown in Fig. 3.
It operates for a predetermined time only when the detection state changes, for example from a steady monitoring state to a gas leak detection state, and transmits transmission information by radio waves from the transmission antenna 3.

Next, the internal configuration of the transmitter 2 will be explained. A conversion circuit 4 converts the voltage signal from the abnormal state detector 1 into a logic level signal. That is, normal output
When 6V is received, it becomes L level and gas leak output.
When it receives 12V, it converts it to H level and outputs it to the OR circuit 5 and the discrimination circuit 6. In addition, the conversion circuit 4
It is connected to the set terminal S of the flip-flop circuit 7 via a non-locking test switch SW. This flip-flop circuit 7 is a holding means that holds the transmitting operation of the transmitting means for a predetermined time determined by a timer circuit by operating a test switch SW when transmitting a test signal, which will be described later. An output terminal Q of the flip-flop circuit 7 is connected to an OR circuit 5 and a discrimination circuit 6. The OR circuit 5 inputs the signals from the conversion circuit 4 and the flip-flop circuit 7, and sends the OR output to the data code setting circuit 11.
Output to. The discrimination circuit 6 inputs the signals from the conversion circuit 4 and the flip-flop circuit 7, and only when one of the signals changes, that is, when the input level changes from H level to L level or from L level to H level. A determination signal is output to the timer circuit 9. The timer circuit 9 has a timer time T1 in advance.
is set, a timer operation is started based on the discrimination signal from the discrimination circuit 6, and the transmission control circuit 13 is operated for a predetermined time T1. Reference numeral 10 denotes a one-shot circuit, which is activated after the timer output from the timer circuit 9 falls, that is, after the timer time T1 of the timer circuit 9 has elapsed, and outputs a one-shot pulse to the reset terminal RE of the flip-flop circuit 7 to reset the flip-flop circuit 7. Reset. 8 is a reactivation means with a built-in delay circuit, and when the inverted output from the flip-flop circuit 7 is input, a reactivation signal is sent to the timer circuit 9 after a predetermined delay time T5 longer than the reception duration _T0 , which will be explained later. The signal is output and the timer circuit 9 is operated again. Reference numeral 11 denotes a data code setting circuit, in which a unique address is set in advance, and when an H level indicating a gas leak state or an L level indicating a normal state is input from the OR circuit 5, its own address and each status content are set. Set the corresponding information code. Reference numeral 12 denotes a modulation oscillation circuit, which together with the transmission control circuit 13 forms a transmission means for transmitting transmission information. That is, the modulation oscillation circuit 12 has a built-in oscillation circuit that oscillates at a constant period and a modulation circuit that modulates the frequency, and operates for a predetermined time T1 based on power supply from the transmission control circuit 13, The frequency is modulated based on the information code from the antenna 3, and the modulated transmission information is transmitted from the antenna 3. Here, as shown in FIG. 3, the transmission information transmitted by the transmission means repeatedly transmits a plurality of pieces of detection information every period T2 over a predetermined time T1.
Furthermore, each piece of detection information is composed of bit pulses, with an address of 12 bits and data of 4 bits, as shown enlarged by an arrow. Note that 14 is a power supply, which charges the output voltage from the abnormal state detector 1 and supplies power to each circuit section.

FIG. 2 is a block diagram showing an embodiment of a receiving section installed outside a dwelling unit. 15 is a receiving antenna, 16 is a receiver, and the receiver 16 is a transmitter 2.
The detection information is reproduced by receiving the transmitted radio wave from the detection information, the detection contents are determined from the address and data included in the detection information, and the alarm 17 is caused to display an alarm of gas leakage abnormality. In addition, receiver 1 installed outside the residence
6 has a built-in battery as a power source, and performs reception processing intermittently only during intermittent reception time frames in order to suppress battery consumption. That is, as shown in FIG. 3, the transmitted radio waves are intermittently received only during the reception time period T3 set after the interval time T4 has elapsed. Further, the alarm device 17 is equipped with alarm means such as a buzzer and a lamp for warning of gas leakage, and an actuation means for closing a solenoid valve provided at the gas main valve in the event of a gas leakage.

Next, the internal configuration of the receiver 16 will be explained. 18
is the power supply and supplies power to each part. A receiving circuit 19 detects detection information received via the receiving antenna 15 and outputs the detected information to the processing circuit 20 . The processing circuit 20 shapes the signal output from the receiving circuit 19 and reproduces the pulse, checks the address included in the information pulse, and decodes the data code when it matches its own address code.
Based on the decoding result, a processed signal is output to the power supply control circuit 21 and the starting circuit 22. The power supply control circuit 21 intermittently supplies power to the reception circuit 19 from the power supply 18 using a battery, and for example, as shown in FIG.
After the elapse of time, power is supplied for a predetermined time T3, and the intermittent power supply time is set as the reception frame time T3 in the reception circuit 19. Therefore, the receiving circuit 19 receives power supply only within this receiving time period T3, and can receive the transmitted radio waves from the transmitter 2. In addition, the power supply control circuit 21
When the signal output from the processing circuit 20 is obtained, the built-in retrigger timer is started, and power is supplied to the reception circuit 19 for a predetermined time T ₀ determined by the retrigger timer, and even after the reception time period has elapsed, the retrigger timer is activated. The power supply voltage is supplied to the receiving circuit 19 for a predetermined period of time T ₀ so that the reception circuit 19 can be maintained in a state in which reception is possible. The activation circuit 22 sends out an activation signal for activating the alarm 17 based on the output from the processing circuit 20. 23 is a power supply voltage drop detection circuit, which detects a drop in battery voltage.

Here, the transmission time T of the transmission information from the transmitter 2
1 is set longer than the interval time T4 in the receiver 16, and the interval time T4 is set sufficiently longer than the reception window time T3. This reception frame time T3 is set to be at least 1.5 times the period T2 of the information pulse train. Further, the predetermined time T ₀ for continuing reception determined by the retrigger timer is at least 1.5 times the period T2 of the information pulse train and longer than the delay time T5 of the reactivation means 8 in order to ensure the reception processing of the detected information. Set short. That is, the mutual time relationships such as T1>T4 T4>>T3 T3≧1/2×T2 T ₀ >1/2×T2 T5>T ₀ are determined.

Next, the operation will be explained.

FIG. 3 is a signal waveform diagram when the abnormal state detector 1 detects a gas leak. First, the operation when an abnormality is detected will be explained with reference to FIG. When gas leakage is detected by the abnormal state detector 1, the output voltage of the abnormal state detector 1 increases from the previous 6
volt to 12 volts. As shown in FIG. 1, the conversion circuit 4 receives the gas leak detection voltage of 12 volts from the abnormal state detector 1, converts it to H level, and outputs it to the OR circuit 5 and the discrimination circuit 6. The OR circuit 5 inputs the H level from the conversion circuit 4 and operates the data code setting circuit 11. At the same time, the determination circuit 6 determines that the output level from the conversion circuit 4 has changed from the L level to the H level, outputs a determination signal to the timer circuit 9, and operates the timer circuit 9. The transmission control circuit 13 operates the modulation oscillation circuit 12 for a predetermined time T1 based on the timer output from the timer circuit 9. The modulation oscillation circuit 12 performs frequency modulation based on the information code from the data code setting circuit 11,
Outputs modulated transmission information. That is, as shown in FIG. 3, a plurality of pieces of detection information are repeatedly transmitted from the antenna 3 every cycle T2 over a predetermined time T1.

Next, the receiving operation of the receiver 16 will be explained. Second
As shown in the figure, in the receiver 16, the power supply control circuit 21 sets the intermittent reception frame time T3 at every interval time T4, and the transmitter 2 transmits the transmission information over the transmission time T1. When this is done, the received radio waves are received within the reception time period T3 corresponding to the transmission time T1. For example, as shown in FIG. 3, if transmission information No. 4 is received within the reception time frame T3, the processing circuit 20 checks it with its own address and determines that it matches, and the power supply control circuit A signal is output to 21.
The power supply control circuit 21 activates a built-in retrigger timer and maintains the power supply state to the receiving circuit 19 for a predetermined time T ₀ . The power supply is maintained each time a plurality of pieces of detection information are received until the last detection information is received, and when the Nth and last detection information is received, the power supply control circuit 21 The retrigger timer continues for a predetermined time T ₀ after receiving the last detection information.
If no signal is obtained during this final holding time _T0 , the processing circuit 20 determines that the Nth detection information is the final detection information, and controls the gas according to the information content of the final detection information. The leakage detection information is output to the starting circuit 22. The activation circuit 22 sends an alarm activation signal to the alarm device 17, and operates alarm means such as a buzzer and a lamp, and an actuation means for closing a solenoid valve provided at a gas main valve.

FIG. 4 is an explanatory diagram of the operation during the operation test. Fourth
The test operation will be explained with reference to the figure. First, a test gas is applied to the abnormal state detector 1, and the abnormal state detector 1 is caused to perform a detection operation. Then, immediately operate the test switch SW. As shown in FIG. 4, when the abnormal state detector 1 detects a gas leak, the conversion circuit 4 outputs an H level, and when the test switch SW is operated in this state, the H level changes to the flip-flop circuit 7. The flip-flop circuit 7 operates. When the flip-flop circuit 7 operates, an H level is applied from the output terminal Q to the OR circuit 5 and the discrimination circuit 6.
Furthermore, a timer circuit 9 is activated by the signal output from the discrimination circuit 6 to maintain the transmitting operation of the transmitting means for a predetermined time T1. Even if the abnormal state detector 1, which has been activated by the test gas, returns to its normal state due to the stop of leakage of the test gas, the flip-flop circuit 7
Since the H level is continuously applied to the OR circuit 5 and the discrimination circuit 6, the data code setting circuit 11 and the timer circuit 9 continue to operate for a predetermined time T1. In other words, under normal conditions when the output of the flip-flop circuit 7 is at the L level, when the normal state is restored while an information code indicating an abnormal state based on gas leak detection is being transmitted, the data code setting circuit 11 outputs an information code indicating the normal state. This means that no alarm will be issued on the receiving side. Therefore, the transmitting means transmits the information code from the data code setting circuit 11, that is, the test signal indicating the gas leak state, from the transmitting antenna 3 for a predetermined time T1. On the other hand, when the timer circuit 9 finishes its timer operation, the one-shot circuit 10 outputs a one-shot pulse based on the falling signal from the timer circuit 9, and resets the flip-flop circuit 7. When the flip-flop circuit 7 is reset, the re-activating means 8 is activated based on the signal output from the inverting output terminal of the flip-flop circuit 7, and after a predetermined delay time T5 has elapsed, a re-activating signal is given to the timer circuit 9, and the timer circuit 9 is activated. get it working again. Here, since the abnormal state detector 1 has returned to the normal state, the data code setting circuit 11 provides the modulation oscillation circuit 12 with an information code indicating the normal state based on the L level output from the OR circuit 5. There is. Further, the transmission control circuit 13 operates for a predetermined time T1 based on the timer output from the timer circuit 9, and supplies power to the modulation oscillation circuit 12. Modulation oscillation circuit 12 is data code setting circuit 1
1, that is, an information code indicating a normal state, and transmits the modulated normal state via the antenna 3 for a predetermined time T1.

Next, the receiving operation of the receiver 16 will be explained. First, when a test signal is received from the transmitter 2 via the antenna 15, the final information content is decoded in the processing circuit 20, and if the information content determines that there is a gas leak, the activation circuit 22 is activated to generate an alarm. The controller 17 is instructed to perform an alarm operation. Next, when a normal signal is received after a predetermined delay time T5 has elapsed after receiving the test signal, the final information content is decoded in the processing circuit 20, and when it is determined that it is in a normal state, the activation circuit 22 is activated and an alarm is issued. The vessel 17 is restored.

In the above embodiment, an intermittent operation type receiver which receives radio waves from a transmitter only within a predetermined reception frame time set intermittently is used as the receiver, but it is possible to use an intermittent operation type receiver that receives radio waves from a transmitter only within a predetermined reception time frame set intermittently. It may also be constructed using a continuous operation type receiver that performs reception operations.

(Effect of the invention) As explained above, according to the invention, the detection signal from the abnormal state detector is determined, and when a change in state is determined, the timer circuit is activated, and the timer circuit operates for a predetermined period of time determined by the timer circuit. It consists of a transmitter that drives a transmitter to repeatedly transmit detection information corresponding to the determination content via radio waves, and a receiver that receives the transmitted radio waves from the transmitter and activates an alarm unit based on the final detection information. In an abnormal condition alarm device, a holding means is provided to hold the transmitting operation of the transmitting means for a predetermined time determined by a timer circuit by operating a test switch during an operation test. Even if only a certain amount of time is given, the abnormal state detector, which has once operated to detect gas leakage using the test gas, is held by the holding means for a predetermined period of time, and the test signal can be reliably transmitted.

In addition, a reactivation means is provided to reactivate the timer circuit after a predetermined time period longer than the reception duration has elapsed after the holding means is restored, and a time frame for transmitting a normal signal is set after the test signal transmission is completed. It is possible to ensure that the receiver and the alarm device perform the test operation, and to automatically restore the receiver and the alarm device that have undergone the test operation based on the normal signal after the test signal transmission is completed.

Furthermore, when testing the operation of multiple abnormal condition alarm devices, testing can be carried out efficiently and efficiently by simply supplying test gas to each abnormal condition detector for a short period of time and operating the test switches one after another. It can be done in a short time.

[Brief explanation of the drawing]

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 transmitted information from the transmitting section shown in FIG. 1, and FIG. 3 is a block diagram of signals between transmitting and receiving. The waveform diagram and FIG. 4 are explanatory diagrams of operation during an operation test. 1...Abnormal state detector, 2...Transmitter, 3,1
5... Antenna, 4... Conversion circuit, 5... OR circuit, 6... Discrimination circuit, 7... Flip-flop circuit, 8... Reactivation means, 9... Timer circuit, 1
0...One shot circuit, 11...Data code setting circuit, 12...Modulation oscillation circuit, 13...Transmission control circuit, 14, 18...Power supply, 16...
...Receiver, 17... Alarm, 19... Receiving circuit,
20...processing circuit, 21...power control circuit, 22...starting circuit, 23...battery voltage drop detection circuit.

Claims (1)

[Scope of Claim for Utility Model Registration] Distinguishing the detection signal from the abnormal state detector and activating a timer circuit when determining a state change from a normal detection signal to an abnormal detection signal or from an abnormal detection signal to a normal detection signal, The transmitting means is driven for a certain period of time determined by the timer circuit to repeatedly transmit abnormality detection information or normality detection information corresponding to the determination content by radio waves, and during the transmission, the detection state of the abnormality detector changes. a transmitter that switches to transmit the detected information after the change if the detected information changes; a receiver that receives the transmitted radio waves from the transmitter and activates the alarm section only when the final detected information is abnormality detection information; In the abnormal condition alarm device, the transmitter is configured to control the transmitting operation of the transmitting means based on the operation of a test switch when an abnormality detection signal is output from the abnormal condition detector in accordance with a gas leak test. a holding means for holding the alarm for a certain period of time determined by a circuit, and enabling activation of an alarm based on a gas leak test on the receiving side even if the abnormal state detector returns to a normal state before the elapse of the certain period of time; After a predetermined period of time has elapsed since the abnormal state detector was restored to normal state after the test, the receiving side is notified that the abnormal state detector has returned to the normal state after the test, and the timer circuit is reactivated to transmit a normal signal in order to restore the alarm. An abnormal condition alarm device comprising: means and;