摘要:
A multivibrator includes two C-MOS inverters (10 and 11) with the input of one inverter (11) connected to the output of the other. The output of the one inverter (11) is connected by a resistor (16) and capacitor (17) in series to its input and the junction of the resistor and capacitor is connected to the base of a transistor (14) having its emitter connected to one pole of the D.C. supply and its collector connected to the input of said other inverter. This arrangement reduces the current drawn by the multivibrator. A fire alarm system incorporating the multivibrator is also disclosed.
摘要:
Disclosed is an anti-disaster system for receiving terminal data in response to the sequential calling of the terminals (22-30) which is achieved by designating addresses from a receiver (10) and for performing alarming or the like. Each of the terminals has an interrupt transmission section for transmitting a break signal which invalidates a terminal response signal on a timing when the terminal response signal to the receiver (10) is transmitted when an abnormality is detected to notify generation of an interrupt.
摘要:
The body of a detector is connected to a connection portion, a ten-key pad and a + 1 key are used to set the address, and a writing key is depressed to write the address on a memory. When a mode switch is set to an analog mode and then a test key is depressed, a test of the detector can be performed in such a manner that address information of the body of the detector is read and indicated through the connection portion. Furthermore, when a test cable is connected to a terminator of a circuit in the detector followed by switching the mode switch to a terminator side and depressing the test key, a test of the terminator can be performed. According to the present invention having the foregoing structure, a multiplicity of addresses can be set in a short time, satisfactory portability can be realized and a test of the detector and that of the terminator can be performed.
摘要:
The analog smoke detector (3a) includes a transmission/reception circuit (31) for receiving an A/D conversion command from a control panel through a transmission path (8). It is composed of a light emitting element (38a), a test light emitting element (38b), a light receiving element (39), a light emitting element drive circuit (36), an amplifying circuit of received light (40) and transistors (Q1, Q2, Q3). It is further provided with a MPU (32) which includes a CPU, a ROM storing determination levels, a working RAM and the like An EEPROM (33) is externally connected to the MPU (32). It includes a light emitting element control circuit (36) for outputting a drive pulse based on the light emission control pulses P1, P2 output from the MPU (32) and the detecting light emitting element (38a) for emitting light for receiving dispersed light caused by smoke generated by a fire.
摘要:
The body of a detector is connected to a connection portion, a ten-key pad and a + 1 key are used to set the address, and a writing key is depressed to write the address on a memory. When a mode switch is set to an analog mode and then a test key is depressed, a test of the detector can be performed in such a manner that address information of the body of the detector is read and indicated through the connection portion. Furthermore, when a test cable is connected to a terminator of a circuit in the detector followed by switching the mode switch to a terminator side and depressing the test key, a test of the terminator can be performed. According to the present invention having the foregoing structure, a multiplicity of addresses can be set in a short time, satisfactory portability can be realized and a test of the detector and that of the terminator can be performed.
摘要:
An automatic fire extinguishing system wherein at least two fire detecting sensors are provided. The sensors are disposed at a distance from each other and movable in the horizontal and vertical directions to scan the region to be protected for detecting the angles of a fire source in the horizontal and vertical directions. A distance to the fire source is obtained from the angles of the fire source detected by the respective sensors. A discharge nozzle is set based on the fire source position determined by the angles and the distance of the fire source.
摘要:
An automatic fire extinguishing system wherein at least two fire detecting sensors are provided. The sensors are disposed at a distance from each other and movable in the horizontal and vertical directions to scan the region to be protected for detecting the angles of a fire source in the horizontal and vertical directions. A distance to the fire source is obtained from the angles of the fire source detected by the respective sensors. A discharge nozzle is set based on the fire source position determined by the angles and the distance of the fire source.