JP2866490B2 - Addressed sensor base - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is installed on the underside of a ceiling,
Sensor is detachably mounted multiplex transmission by the central receiver
The present invention relates to an addressable sensor base for notifying a fire.

[0002]

2. Description of the Related Art FIG. 6 shows a bottom view of a conventional sensor base, and FIG. 7 shows an overall block diagram. An address setting section 2 for setting an address is provided on the lower surface of a base body 1 of a sensor base called a point address base, and terminals 3 and 4 which are connected to contacts inside the sensor 5 when the sensor 5 is connected. , A pair of transmission terminals L and C connected to the transmission line 7 from the central receiver 6 and the base body 1 are provided separately.
A pair of connection terminals D and E connected to the external LED 8 are provided. An internal LED 9 for displaying a fire is provided at an end of the base body 1 . A base circuit unit 10 for performing multiplex transmission with the central receiver 6 is provided inside the base body 1 .

In such a conventional example, the base circuit unit 1
Numeral 0 indicates the transmission and reception of data with the central receiver 6 via the transmission line 7 connected to the transmission terminals L and C. When the central receiver 6 accesses the sensor 5, a signal for the sensor 5 to be issued and removed is provided. , The address is read, and the address is returned to the central receiver 6. Further, a lighting control signal for the internal LED 9 and the external LED 8 is sent from the central receiver 6.

[0004]

In such a conventional example, only one sensor 5 can be attached to one sensor base (address), that is, the base body 1. However, there is a demand to attach many sensors to one address. The present invention has been made in view of the above points, and has as its object to provide an addressable sensor base that can be attached to a connection terminal for connecting an external LED and that can be used at low cost for multiple functions. It is what it was.

[0005]

According to the present invention, there is provided a base body in which a sensor internally provided with a contact that is turned on / off in accordance with the presence or absence of a fire is detachably mounted, an address setting unit for setting an address, and a fire. An internal LED for displaying information, a pair of transmission terminals connected to a transmission line on which a multiplex transmission signal from the central receiver is superimposed, and a pair of external LEDs provided for connection of an external LED that is turned on when the sensor is alerted. and connection terminals, sensors of the alarm when accessed by multiple transmission of a central receiver, removal signal, sends back reads addresses, internal L
In the addressable sensor base including an ED and a base circuit unit for controlling the lighting of the external LED, the above pair of connections
It includes a inserted switching element between one of the connection terminals and the power supply of the terminal, and a control circuit for generating a plurality of types of output in accordance with the potential of the other connection terminal of said pair of connecting terminals Receiving the output of the control circuit for detecting the state of the connection terminal, turning on the switch element with the first output of the control circuit by opening the connection terminal, and generating the removal signal; When the external LED is connected to the connection terminal from the open state, the switch element is turned off by the second output of the control circuit with respect to the voltage drop of the other connection terminal due to the external LED, and the switch element is turned on when the sensor issues an alarm. Internal LED and external LE
D is turned on, and when a second sensor is connected to the connection terminal instead of the external LED, a fire signal is detected by the third output of the control circuit based on the alarm of the second sensor. Features.

[0006]

In the base circuit section , when the connection terminal is open, the switch element is turned on to supply power, and it is determined whether an external LED or a second sensor is connected to the connection terminal. Since the switch element is set to ON or OFF by making a determination according to the potential of the terminal, the second sensor can be connected using the connection terminal for connecting the external LED. That is, the external terminal is connected to the external L
When the ED is connected, the switch element can be turned off from on to off, and the external LED can emit light by turning on the switch element only when the sensor issues an alarm. Further, when the second sensor is connected to the connection terminal, the switch element is kept on, and when the second sensor is energized at the time of the alarm, the alarm of the second sensor is detected to generate a fire signal. It can be done. Further, if the external LED or the second sensor is detached from the connection terminal, a detachment signal can be generated by opening the connection terminal.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an overall block diagram, in which connection terminals D, E
Connected to either the external LED 8 or the second sensor 11
In order to make it possible , detection of a fire signal by the sensor 11;
It is provided with a detection or the like Ru control circuit 12 can removal signal. The other structure is the same as conventional.

[0008] More specifically, FIG.
As shown in FIG.
Bei a power supply circuit 13 supplies power through the transmission line 7, the transmission terminal L by the return signal from the base circuit part 10, and a return circuit 14 to send a return signal to the transmission line 7 through C to
The address setting unit 2 includes an address setting switch 15 and the like, and the control circuit 12 includes a comparator and a logic circuit.
Is configured.

Further, terminals 3 and 4 for connecting the sensor 5 are provided.
Chi terminal 4 is composed of two terminals 4a, 4 b, sensor 5
The terminals 4a and 4b are connected to each other at the terminal 16 of the first embodiment . The states of terminals 3 and 4 and connection terminals D and E
It is monitored by the control circuit 12 and the output of the control circuit 12 is
The force is input to terminals C11 and C12 of the base circuit unit 10.
You. Also, based on the inputs to the terminals C11 and C12, signals of L level and H level are output from the terminals OD0 and OD1.
It is. Here, the control circuit 12 is connected to the terminal connected to the terminal 4a.
A child INT, and a terminal EXT connected to the terminal D,
As described later, according to the input voltage to each terminal INT, EXT.
Changes the input to the terminals C11 and C12 of the base circuit unit 10.
To

FIG . 2 shows an external LED 8 connected to connection terminals D and E.
This is the case where the monitoring has been continued, indicating a normal monitoring state. this
At this time, the output of each terminal OD0, OD1 of the base circuit unit 10 is
L level and H level respectively, and the transistor Tr
₁ and Tr ₂ are off, the transistors Tr ₃ and Tr ₄ are on, and the transistor Tr ₃ is on, so that the transistor Tr ₅ is off and the internal LED 9 is off. Transistors Tr ₁ and Tr ₂ and transistor T
r ₃ and Tr ₄ each function as a switch element .
At this time, input to the terminals C11 and C12 of the base circuit unit 10 is performed.
Both powers are at L level. From the state of FIG. 2, by removing the sensor 5, the current does not flow to the resistor R _1, the control circuit 12 detects the drop of the voltage applied to the terminal INT
And the input to the terminal C12 of the base circuit unit 10 is at the H level.
The base circuit unit 10 processes this as a signal for removing the sensor 5 .

From the state shown in FIG . 2, the detector 5 detects a fire,
When sensor 5 as shown in FIG. 3 the contact is turned on and alarm, control
The control circuit 12 detects a rise in the voltage applied to the terminal INT and detects
The input to the terminal C11 of the base circuit unit 10 is set to the H level.
Start up and input as a fire signal. Here, the terminal OD1 of the base circuit unit 10 changes from H level to L level ,
The transistors Tr ₃ and Tr ₄ are turned off, and the detector 5 is disconnected. At the same time, the terminal OD0 changes from the L level to the H level, so that the transistors Tr ₁ and Tr ₂ are turned on, and the external LED 8 is lit. At this time, since the transistor Tr ₃ is turned off, the transistor Tr ₅ is turned on, internal LED9 also display lighting.

By the way, the connection terminals D and E are open.
Input to the terminal ENT of the control circuit 12 is the ground potential
And the base circuit is the same as when the sensor 5 is removed.
The input to the terminal C12 of the unit 10 is at the H level.
In this state, connects the second detector 11 connected terminal D, and E as shown in FIG. 4 Then, since current flows through the terminating resistor R connected in parallel to the sensitive knowledge 11, the control circuit 12 terminal
The voltage applied to the ENT rises, and the terminal of the base circuit unit 10
The input to C12 goes to L level. At this time, the outputs of the terminals OD0 and OD1 of the base circuit unit 10 both become H level .
You. Therefore, the transistors Tr _{1 to} Tr ₄ are turned on.
become.

[0013] Next, when the sensor 11 fire <br/> disaster detection is detected by the detector 11 from the state of FIG. 4 is alarm, the control circuit 1
2 is applied to the terminal EXT, and the base circuit 1
A fire signal that rises to the H level is input to the 0 terminal C11 . Then, the terminals OD0 , OD of the base circuit unit 10
The output of the 1 are both L level. Therefore, the transistor Tr ₁ to Tr ₄ are turned off, so that the sensor 5 and 11 are disconnected together. At this time, since the transistor Tr ₃ is turned off, the transistor Tr ₅ is turned on, internal LED9 also display lighting.

Incidentally, even when the external sensor 11 is connected to the connection terminals D and E, when the sensor 5 operates, the same operation as described above is performed. As described above, in the present invention, by controlling the two-bit signals of the terminals OD0 and OD1 of the base circuit unit 10 in four ways, the following control can be performed. That is, an external LED is connected to the connection terminals D and E.
8, when the fire signal and the removal signal of the sensor 5 are detected and the alarm is issued, the sensor 5 is disconnected, and the LED 8,
9 lighting control can be performed.

The external terminals 11 and 11 are connected to the connection terminals D and E, respectively.
Is connected, the detection of the fire signal and the removal signal of the sensor 5 and the release of the sensor 5 after the alarm is issued, the detection of the fire signal of the sensor 11 and the removal signal (disconnection signal), and the detector after the alarm is issued 11 and lighting control of the internal LED 9 can be performed. Therefore, since control can be performed by a 2-bit signal from the base circuit section 10, a low-cost, multifunctional addressable detector base can be configured. The <br/> Ru to Yosu, control the control circuit 12, the connection terminals D, in the open state of the E keep supplying power to turn on the transistor Tr _3, Tr _4, the connection terminals D, and external LED8 to E The potential of the connection terminals D and E indicates whether the connection is made or whether the second sensor 11 is connected.
Of the transistors Tr ₃ ,
Since Tr ₄ is set to ON or OFF, external LED 8
Can be connected to the second sensor 11 by using the connection terminals D and E for connecting. That is, when an external LED is connected to the connection terminals D and E, the transistor T
r ₃ and Tr ₄ are turned off from on to off so that the transistors Tr ₃ and Tr ₄ are turned on only when the sensor 5 issues an alarm.
By turning on ₄ , the external LED 8 can emit light. When the second sensor 11 is connected to the connection terminals D and E, the transistors Tr ₃ and Tr ₄ are kept on, and the second sensor 11 is turned on.
When the second sensor 11 is energized at the time of the alarm of the second sensor 11
The fire signal can be generated by detecting the alert of the fire. Further, if the external LED 8 and the second sensor 11 are detached from the connection terminals D and E, a disconnection signal can be generated by opening the connection terminals D and E.

[0016]

According to the present invention, as described above, a pair of connection terminals is provided.
A switch element that is inserted between one of the connection terminals and the power of the provided a control circuit for generating a plurality of types of output in accordance with the potential of the other connection terminal, the base circuit part, the connecting terminal In response to the output of the control circuit for detecting the state, when the connection terminal is open, the switch element is turned on to supply power, and it is determined whether the external LED or the second sensor is connected to the connection terminal. Since the switch element is set to ON or OFF by making a determination according to the potential of the connection terminal, there is an advantage that the second sensor can be connected using the connection terminal for connecting the external LED. Have. That is, when the external LED is connected to the connection terminal, the switch element is turned off from on to turn off the light, and the switch element is turned on only when the sensor issues an alarm to turn off the external LED.
The ED can emit light. In addition, the second connection terminal
When the second sensor is connected, the switch element is kept on, and when the second sensor is turned on, the fire of the second sensor can be detected to generate a fire signal. Further, if the external LED or the second sensor is detached from the connection terminal, a detachment signal can be generated by opening the connection terminal. As a result, the second sensor can be connected to the base main body, and an effect that a low-cost, multifunctional addressable sensor base can be configured can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a circuit diagram of a normal monitoring state when an external LED is attached.

FIG. 3 is a circuit diagram of a monitoring state during a fire when an external LED is attached.

FIG. 4 is a circuit diagram of a normal monitoring state when an external sensor is attached.

FIG. 5 is a circuit diagram of a monitoring state at the time of fire when an external sensor is attached.

FIG. 6 is a bottom view of a conventional sensor base.

FIG. 7 is a block diagram of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base main body 2 Address setting part 5 Sensor 6 Central receiver 7 Transmission line 8 External LED 9 Internal LED 10 Base circuit part 11 Second sensor 12 Control circuit L, C Transmission terminal D, E connection terminal

Claims (1)

(57) [Claims] 1. A base body on which a sensor internally provided with a contact that turns on and off according to the presence or absence of a fire is detachably mounted, an address setting unit for setting an address, an internal LED for displaying fire information, A pair of transmission terminals connected to a transmission line on which a multiplex transmission signal from the central receiver is superimposed, a pair of connection terminals provided for connection of an external LED that is turned on when a sensor is activated, and a central receiver. alarm of sensors at the time of access by multiplexing transmission of the removed signal, sends back Nde write <br/> read address, address-embedded sensor base with a base circuit for lighting control internal LED or external LED in a switch element inserted between one of the connection terminals of said pair of connection terminals and the power supply, the pair
A control circuit that generates a plurality of types of outputs in accordance with the potential of the other connection terminal of the connection terminals, the base circuit unit receives an output of a control circuit that detects a state of the connection terminal, The switch element is turned on by the first output of the control circuit by opening the connection terminal, and a detachment signal is generated, and the voltage of the other connection terminal by the external LED when the external LED is connected to the connection terminal from the open state. When the switch element is turned off at the second output of the control circuit for the fall and the sensor issues an alarm, the switch element is turned on to turn on the internal LED and the external LED, and the connection terminal is replaced with the second LED instead of the external LED. A fire detector for detecting a fire signal at a third output of the control circuit in response to an alarm from the second sensor when the sensor is connected.