JP3131705B2 - Sensor connection test method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for testing the connection of sensors connected to a plurality of local lines.

[0002]

2. Description of the Related Art In a building such as a building, a large number of fire detectors are provided in a plurality of fire alarm areas for fire monitoring. As shown in FIG. 4, these sensors a _{1 to} a _N are connected to signal lines L of respective local lines (hereinafter referred to as connection lines).
It is connected to the receiver b via _{1 to} L _N -common line C. However, the connection mistake of the connecting line L-C, for example, sensor a ₁ to a connection line of the signal line L ₁ - if it is to be connected to the common line C, the signal line L of the sensing device a ₁ a connection line
₂ -Common line C may be connected. Then, despite detects fire detector a _1, the receiver b determines that it has received the fire signal from a detector a _2. For this reason, it is not possible to accurately know the place where the fire occurred, so that the fire extinguishing activity is delayed and the initial fire extinguishing becomes difficult.

In order to solve such a problem, the following test method has conventionally been adopted. That is, after the installation work of the detector is completed, a smoke tester or a heating tester is brought close to the detector and smoke or heat is applied so that the detector transmits a fire signal to a predetermined receiver. Or judge.

[0004]

The conventional test method has the following problems. (1) The detector is covered with a dust-proof cover in order to prevent dust and the like from adhering during construction. However, when conducting a smoke test or the like, the test cannot be performed unless the dust-proof cover is removed. Therefore, if the test is performed before the completion of the construction, the dust cover is removed, and dust generated during the construction adheres to the detector. (2) It is difficult to bring a smoke tester or the like close to the detector installed in a place where there is an obstacle near the ceiling such as a high ceiling or a pipe. for that reason,
The test cannot be performed easily and accurately.

SUMMARY OF THE INVENTION In view of the above circumstances, it is an object of the present invention to enable a simple connection test without removing a dustproof cover.

[0006]

SUMMARY OF THE INVENTION The present invention comprises a sensor;
A receiver having a power supply for supplying power to the sensor; a connection line connecting the sensor and the receiver; a test switch disposed on the connection line; The present invention is intended to achieve the above object by providing:

[0007]

When the power supply to the sensor is stopped by operating the test switch of the connection line to be tested, the power supply confirmation means such as the power supply indicator lamp does not display the power supply. At this time, if the energized display state is maintained, a connection error has occurred.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIG. The fire detector 1 is connected to a receiver 10 via a signal line L-common line C of a first connection line (area line). In the fire detector 1, reference numeral 2 denotes an ionization type, photoelectric type, thermal type or the like fire detection unit, 3 denotes a fire determination unit, 4 denotes a switching unit, 5 denotes an operation indicator, and 6 denotes a constant voltage unit. The sensor 1 is provided with a pulse cycle generator 7 for pulsating the operation indicator lamp 5 when energized. Receiver 10
Is provided with a detection unit 11 and a power supply 12 for supplying power to the sensor 1. A test switch, for example, a short-circuit switch 15 is disposed between the connection lines LC in parallel with the power supply 12. As described above, the sensors are connected to the plurality of connection lines (area lines), and the test switches are separately connected.

The operation of this embodiment will be described. Under normal conditions, the short-circuit switch 15 is kept open (off). Therefore, the power supply 12 of the receiver 10 is connected to the first connection line L
Since the power is supplied to the fire detector 1 through -C, the pulse signal generated from the pulse period generator 7 passes through the backflow prevention diode 14 to turn on the operation indicator 5 in a pulsed manner. Therefore, it can be confirmed from the lighting that the fire detector 1 is energized.

When a fire occurs, when the fire detection unit 2 detects a fire, the fire determination unit 3 closes (turns on) the switching unit 4. Therefore, the operation indicator lamp 5 is continuously turned on, and a fire signal is output to the detection unit 11 of the receiver 10.

During the connection test of the sensor 1, the short-circuit switch 15 is turned on (closed). Then, a short circuit occurs, and the power supply from the power supply 12 to the sensor 1 is stopped, so that the pulse lighting of the operation indicator lamp 5 is stopped and turned off. As a result, since it is known that the power supply 12 of the receiver 10 is connected to the sensor 1, it can be confirmed that the connection is correct.

At this time, if the pulse lighting of the operation indicator lamp 5 does not stop, the sensor 1 is not connected to the power supply 12 of the receiver 10 through a predetermined connection line, but is connected through another connection line. Therefore, the connection to the power source of the receiver is made, so that it is understood that the connection is wrong. For example, when the sensor 1 and the receiver 10 are to be connected to the signal line L-common line C of the connection line and connected to the signal line L ₁ -common line C of another connection line, the short-circuit switch 15 Even when the switch is turned off, the pulse lighting of the operation indicator lamp 5 is maintained, so that it is understood that the connection is incorrect. Therefore, the sensor 1 is connected again to the signal line L-common line C of the connection line.

A second embodiment of the present invention will be described with reference to FIG. 2. The same reference numerals as those in the first embodiment have the same names and functions. The difference between the second embodiment and the first embodiment is that an energization indicator 20 is provided in the sensor separately from the operation indicator 5. In this embodiment, in the normal state, the energizing indicator 2
0 is pulsed, but the short-circuit switch 15
Is closed (off), when there is no connection error, the power supply from the power supply 12 to the sensor is stopped, and the power indicator 20
Turns off.

A third embodiment of the present invention will be described with reference to FIG. 3. The same reference numerals as those in the first embodiment have the same names and the same functions. The difference between the third embodiment and the first embodiment is that a test switch such as a non-lock switch is provided for each connection line in a signal line or a receiver on the signal line side. In this embodiment, the operation indicator 5 is normally used.
When the non-locking type switch 30 is opened (off) during the connection test, if there is no connection error, the power supply from the power supply 12 to the sensor is stopped and the operation indicator 5 is turned off.

The present invention can be used not only for a fire detector but also for other detectors, for example, a gas detector, and can be used for an analog sensor, an addressable sensor and the like. Instead of using the indicator light, or an acoustic device such as a buzzer may be installed in the sensor as a confirmation means for notifying the energization of the sensor. Further, the short-circuit switch 15 may not be connected at all times, and may be attached to the terminal block to which the connection line of the receiver is connected by an adapter or the like only at the time of a test.

[0016]

The present invention has been configured as described above.
The power supply to the sensor can be stopped by operating the test switch. At this time, if the power supply to the power supply confirmation means is stopped, the connection is normal, and if the power supply is not stopped, a connection error has occurred. As described above, the sensor connection test can be performed simply by operating the test switch, so that the test can be performed easily and reliably even when the sensor is covered with the dust-proof cover, unlike the conventional example. it can.

[Brief description of the drawings]

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

FIG. 2 is a block diagram showing a second embodiment of the present invention.

FIG. 3 is a block diagram showing a third embodiment of the present invention.

FIG. 4 is a diagram showing a conventional example.

[Explanation of symbols]

 Reference Signs List 5 operation indicator (power check means) 7 pulse cycle transmitter 10 receiver 12 power supply 15 short-circuit switch 20 power indicator L-C first connection line L signal line C common line

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G08B 17/00 G01R 31/02 G08B 29/06

Claims (7)

(57) [Claims] 1. A step of supplying power to a sensor from a power supply of a receiver via a plurality of connection lines and activating an energization checking means of the sensor; and operating a test switch on the receiver side to establish a desired connection. And c. Stopping the power supply to a line. 2. A sensor; a receiver having a power supply for supplying power to the sensor; a connection line connecting the sensor and the receiver; a test switch disposed on the connection line; An energization check means for notifying the energization of the sensor by turning on the power;
A sensor connection test device, comprising: 3. A sensor provided with an operation indicator light; a receiver provided with a power supply for supplying power to the sensor; a connection line connecting the sensor and the receiver; A connection test apparatus for a sensor, comprising: a test switch; and pulse generation means for pulsating an operation indicator lamp when the power is turned on. 4. A sensor having an operation indicator light and a confirmation light;
A receiver having a power supply for supplying power to the sensor; a connection line connecting the sensor and the receiver; a test switch disposed on the connection line; Lighting means; and a connection test apparatus for the sensor. 5. The sensor connection test apparatus according to claim 1, wherein the test switch is provided in the receiver. 6. The sensor according to claim 1, wherein the test switch is a short-circuit switch disposed between the common line and the signal line of the connection line. Connection test equipment. 7. A sensor connection test apparatus according to claim 1, wherein the test switch is a non-locking type switch provided in series with a signal line of a connection line. .