JPS6154596A - Fire self-alarm system - 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] [Technical field 1 The present invention relates to a self-fire alarm system.

[Background Art] Conventionally, in this type of self-fire alarm system that uses at least a general type sensor and a point address type sensor in combination, when the general type sensor operates, the line voltage of signal port #a4 drops. However, other sensors were unable to secure power supply voltage and were inoperative.

Since a point address type sensor is a general type sensor provided with a transmission section for sending out point address data, it has been impossible to detect the operation of a plurality of point address type sensors for the reasons mentioned above.

Furthermore, even if a circuit configuration that reduces the operating current is used for each sensor to enable the operation of multiple point address type sensors 3, the continuous operating current at that time will be large, and it is necessary to take into account the buffering and taping by the battery. This was not possible with the system.

[Object of the Invention] The present invention was made in view of the above-mentioned problems, and its purpose is to enable the operation of multiple point address type sensors even after the operation of other sensors, and to reduce the The purpose is to provide a self-fire alarm system with low current consumption.

[Disclosure 1 of the Invention The present invention will be described below with reference to Examples. Figure 1 shows a basic schematic diagram of the self-fire alarm system, with receiver 1
The signal derived from #
and a point address type sensor 4 are connected together. The receiver 1 superimposes a transmission signal consisting of a pulse code signal containing address data individually assigned to each intelligence type sensor 2 on the line voltage (or current) of the signal line 1, and cyclically and sequentially sends out the signal. In addition to determining the information sent as return number 13 from each called intelligence type sensor 2, by monitoring the line voltage and line current level of signal line 1, general type sensor 3 and point It performs various control operations such as receiving the level signal from the address type sensor 4 and detecting the reception of point address data. The above-mentioned control operation is performed in a time-divided manner during the time period for monitoring the type sensor 4 and the time period for monitoring the line of the signal line I.Addresses can be set for each intelligence type sensor 2, and When the address data included in the transmitted transmission signal matches the self-configured address,
Control data in the transmission signal is taken in, and various information is superimposed and sent back to the receiver 1 as a return signal consisting of a pulse code signal during a return period provided at the rear of the transmission signal. - When the pattern sensor 3 detects a predetermined (ffi concentration or temperature), the built-in sensing section turns on, short-circuits the signal line 1 through an appropriate resistance, changes the level of the line current or line voltage, etc. A fire detection signal is transmitted to the receiver 1 as a signal.Furthermore, the point address type sensor 4 performs the same sensing operation as the general type sensor 3, and also senses the data of a preset point address. During operation, it is superimposed and transmitted on the signal line 1.The receiver 1 side includes a Zener diode to ensure that the voltage on the signal line 1 is the minimum voltage necessary for the general sensor 3 to operate. A constant voltage circuit 6 is provided.A resistor R connected in parallel with the constant voltage circuit 6 is a resistor for detecting the operation of the general type sensor 3, and the voltage across this resistor R causes the receiver 1 to detect the operation. Also, the constant voltage circuit 6 is connected to the resistor R.
Even if the current flowing through the signal line increases, the voltage across the signal line is limited so that it does not exceed a certain level, and the line voltage of the signal line is prevented from falling below the general type sensor layer operating voltage. Now, FIG. 2 shows an example circuit of the general type sensor 3, and the signal line 1
is connected to via a diode bridge DB, and the sensing section 5 is connected to the output terminal of the diode bridge DB via a PNP type transistor Q and resistors R1 and R2. Further, a series circuit of a resistor R4 and a Zener diode ZD is connected to the base of the transistor Q1, and a series circuit of a resistor R1, a transistor Q2, and a sensing section 5 is connected in parallel to the series circuit. The input and emitter are connected in parallel to the parallel circuit of the resistor R2 and capacitor C1.

Figure 13 shows an example circuit of a point address type sensor, and this circuit connects a resistor R2 in parallel to a transistor Q2, and transmits point address data when the sensing unit 5 operates in parallel to the sensing unit 5. This sensor differs from the general type sensor 3 in that a transmission section 7 is connected thereto.

Therefore, in the pattern type sensor 3, if the other general type sensor 3 and the point address type sensor 4 are inactive, the transistor Q1 is in an on state, but the line voltage drop is small. The sensing unit 5 is in a normal operating state. When the sensing section 5 of the sensor 3 performs a sensing operation, a voltage drop occurs across the resistor R2, and the base current of the transistor Q2 flows, turning on the transistor Q2. Therefore, the on state of the transistor Q is maintained, and the fire detection signal is transmitted as a current signal to the receiver 1 via the diode bridge DB, the transistor Q, the resistors R,, Ri, the sensing section 5, and the signal line 1.
will be sent to. Furthermore, if another general type sensor 3 or point address type sensor 4 operates first, the line voltage of the signal line 1 becomes lower than the Zener voltage of the Zener diode ZD, and the transistor Q turns off, resulting in the sensing section An off-state transistor Q, which is a high impedance element, is inserted between the signal line 5 and the signal line 1, and the sensing section 5 becomes inactive.

On the other hand, in the point address type sensor 4, if the other general type sensor 3 and the point address type sensor 4 are inoperative, the transistor Q is in the ON state for one time, like the general type sensor 3. . Then, when its own sensing section 5 operates, the transistor Q2 turns on similarly to the general sensor 3, keeps the transistor Q on, sends a fire detection signal, and transmits point address data from the transmission section 7. Received via signal line 1 (sent to Iku 1).

By the way, if the other general type sensor 3 or point address type sensor 4 operates first, the transistor Q will be turned off for one turn like the general type sensor 3, but it will not operate to the sensing part 5 via the resistor R1. The circuit through which the minimum required current flows is switched and connected. When the sensing section 5 of the sensor 4 operates, the transmitting section 7 sends point address data. At this time, in the sensor 4, an extremely small amount of current flows as a holding current through the resistors 11-, R1, and R2, so that the current consumption is small. Furthermore, even if the sensors 3 and 4 operate, the voltage of the signal line 1 is guaranteed to be the minimum operating voltage by the constant voltage circuit 6, so multiple point address type sensors 4 operate and send out point address data from each one. Let receiver 1
This allows us to distinguish between these data.

Therefore, it becomes possible to use the point address type sensor 4 for smoke prevention interlocking. Also intelligence type sensor 2
The operating voltage of the receiver 1 is also guaranteed, and the receiver 1 can access the intelligence type sensor 2.

[Effects of the Invention] The present invention is configured as described above, and is provided with a constant voltage circuit for preventing the line voltage of the signal line from falling below the operating lower limit voltage of the sensor in the reception ratio, and also has the line voltage of the signal line A general type sensor is equipped with a high impedance element that is inserted between the sensing section and the signal line and disables the sensing section when the voltage drops below a certain level due to the operation of another sensor. Point address type sensors are equipped with energization switching means that ensures the minimum necessary circuit current for operation when the voltage drops below a certain level due to sensor operation, so general type sensors will not operate if another sensor is activated. Moreover, since a high impedance element is inserted between the sensing part and the signal line, there is no increase in line current, and with point address type sensors, the minimum required circuit current is low even if other sensors operate. Because it is secured, it will not be affected by the operation of other sensors (point address data can be sent, and even if multiple sensors operate due to the constant voltage circuit, the operation of the remaining point address type sensors will not be affected). Therefore, the receiver can detect the sensing operations of multiple point address type sensors, and even if multiple point address type sensors operate continuously, the line current can be kept to a minimum. This has the effect that the system can be realized even if battery backup is taken into account.

[Brief explanation of drawings]

FIG. 1 is an overall circuit configuration diagram of an embodiment of the present invention, FIG. 2 is a circuit diagram of a general type sensor used in the above, and FIG. 3 is a circuit diagram of a point address type sensor used in the same. Receiving machine,
3 is a general type sensor, 4 is a point address type sensor, 5
1 is a sensing section, 3 is a transmission section, 1 is a signal line, Q, , Q2 are transistors, and R9 is a resistor. Agent Patent Attorney Ishi 1) Ai 7th No. 11 6 Figure 2 Amendment of procedure for cause 3 (voluntary) November 12, 1980 Patent Application No. 177005 2, Title of invention Self-fire alarm system 3 , Relationship with the case of the person making the amendment Patent applicant Location 1048 Oaza Kadoma, Kadoma City, Osaka Name (583) Matsushita Electric Works Co., Ltd. Representative Iku Kobayashi 4 Agent postal code 530 5 Date of amendment order 7. Subject of amendment, ゛Make correction document M number: Japanese Patent Application No. 59-177005 1, Insert ``1 Normally'' in front of ``Each intelligence type sensor'' on page 3, line 18 of the specification of the present application. . 2. The entire text of page 4, lines 7 and 8 is corrected as follows. [It is for receiving and transmitting] 3. The entire text of page 5, lines 6 and 7 of the above is corrected as follows. [Similar to the intelligence type sensor 4, when there is a call from the receiver 1, if the sensing operation is performed, the data of the preset point address will be transmitted as a return transmission.'' 4, Same page as above. The entire text of lines 11 and 12 is corrected as follows. [A voltage circuit 6 is provided and a resistor R is connected in parallel to the constant voltage circuit 6 to detect the operation of the general type sensor 3 and point address type sensor 4] 5.
Insert the following sentence into mf of [Now]. ``However, under normal circumstances, the intelligence type sensors 2 are called one after another and the monitoring information of each intelligence type sensor 2 is sent back.Then, the point address type sensor 4 or the general type sensor 3 operates, and the line current increases. Resistance R
When the receiver 1 detects this, it adds the point address type sensor 4 to the intelligence type sensor 2 and sequentially calls these sensors 2 and 3. If there is no return signal from the point address type sensor 4, it is assumed that the general type sensor 3 is operating, and if there is a call from the point address type sensor 4, the return data, that is, the point address data is determined and the sensing operation is performed. Then, the point address type sensor 4 is found. Furthermore, the self-fire alarm system of the present invention will be explained in detail with reference to FIGS. 2 and 3. ”

Claims (1)

[Claims] 1) A general type sensor equipped with a sensing section that short-circuits a signal line through an appropriate impedance during a sensing operation, and a sensing section that short-circuits a signal line through an appropriate impedance during a sensing operation, and a sensor that The sensing operation of the general type sensor can be improved by connecting at least the same signal line as a point address type sensor equipped with a transmission section that sends out point address data, and monitoring the line voltage or line current level of the signal line. In a self-fire alarm system that is equipped with a receiver that detects point address data and monitors a point address type sensor by receiving point address data, the line voltage of the signal line on the receiver side becomes lower than the operating lower limit voltage of the sensor. In addition, a high impedance circuit is installed between the sensing section and the signal line to disable the sensing section when the line voltage of the signal line drops below a certain level due to the operation of other sensors. The element is provided in a general type sensor, and the point address type sensor is provided with energization switching means that ensures the minimum necessary circuit current for operation when the line voltage of the signal line drops below a certain level due to the operation of another sensor. A self-fire alarm system characterized by: