JP3400072B2 - Disaster prevention monitoring 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 backup power supply and a disaster prevention monitoring device having a test function thereof.

[0002]

2. Description of the Related Art Generally, a receiver or a relay panel of a disaster prevention monitoring device is provided with a standby power source so that a fire can be monitored for a predetermined time even if a commercial power source fails. If the voltage and capacity of the standby power supply are low, a problem will occur. Conventionally, as a device for testing this standby power source, for example, as shown in JP-A-1-191296, when switching from the main power source side to the standby power source side,
It is known to detect a voltage across a pseudo load connected to a standby power supply. When a plurality of backup power supplies are provided, a test is performed on the backup power supplies by connecting a dummy load to each backup power supply and detecting the voltage across each dummy load. The pseudo load may also be called a discharge resistance.

[0003]

However, in the above-mentioned conventional apparatus, when a plurality of standby power supplies are provided with pseudo loads, a receiver and a relay board provided with the plurality of standby power supplies and pseudo loads are large in size. There is a problem that it becomes expensive and expensive. In view of the above conventional problems, the present invention,
It is an object of the present invention to provide a disaster prevention monitoring device capable of configuring a receiver and a relay board provided with a plurality of standby power sources in a small size and at low cost.

[0004]

In order to achieve the above object, the present invention provides a main power source for supplying power from a commercial power source to a plurality of loads for disaster prevention monitoring, and the plurality of loads when the commercial power source fails. A plurality of standby power sources for supplying the respective power sources, a plurality of switch means for selectively extracting the respective currents from the plurality of standby power sources, and a pseudo load commonly connected to the plurality of switch means. , Each of the plurality of standby power supplies by selectively turning on one of the plurality of switch means sequentially when testing the plurality of standby power supplies and detecting the voltage across the pseudo load when each switch means is on. testing means for selectively sequentially tested and Tona
The test means selectively directs each of the plurality of standby power sources.
Output a signal for setting, each of the plurality of switch means
A switch that selectively extracts each current from the plurality of standby power supplies.
Switch and the specified signal from the test means is decoded and addressed to itself.
Switch on when receiving the specified signal of
And a decoder .

The present invention is also characterized in that the test of the backup power supply is started by operating a backup power supply test switch. The present invention is also characterized in that a test of the standby power source is automatically started at a predetermined time by a timer. The present invention is also characterized in that the test result is displayed for each of the plurality of standby power sources.

[0006]

[0007]

According to the present invention, one dummy load is provided for a plurality of backup power supplies, and the currents of the plurality of backup power supplies are selectively taken out sequentially to detect the voltage across one dummy load. Each of the plurality of standby power supplies is selectively tested sequentially. Therefore, even if a plurality of auxiliary power supplies are provided, it is not necessary to provide a pseudo load for each auxiliary power supply, and therefore a receiver and a relay board provided with a plurality of auxiliary power supplies can be made compact and inexpensive.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a disaster prevention monitoring device according to the present invention. In FIG. 1, a plurality of transmission lines 12 (only two transmission lines 12a and 12b are shown in the figure) drawn out from a receiver 10 serve as terminals such as a sensor repeater 14 and an analog smoke detector 16. , The analog heat sensor 18, the control relay 20, and the like are connected.
A sensor line 22 is drawn out from the sensor repeater 14, and a plurality of on / off sensors 24 are connected to the sensor line 22.
A transmitter 26 that outputs a fire signal by operating the switch is connected. Further, a control line 28 is drawn out from the control repeater 20, and a control load 30 such as a district bell or smoke proof equipment is connected to the control line 28.

When the on / off sensor 24 detects a fire, the signal line of the sensor line 22 from the sensor repeater 14 is short-circuited to a low impedance, and the sensor repeater 14 detects this line voltage drop and fires. To judge. Also, the transmitter 26 short-circuits the signal lines of the sensor line 22 to a low impedance by a switch operation. On the other hand, the analog smoke detector 16 sends an analog detection signal corresponding to the smoke density obtained from the smoke detector to the receiver 10,
The side makes a fire decision. Similarly, the analog heat detector 18 sends an analog temperature signal corresponding to the temperature obtained from the heat detector to the receiver 10 to cause the receiver 10 side to make a fire decision. Note that the analog smoke sensor 16 and the analog heat sensor 1
8 may output the analog detection signal and, similarly to the on / off sensor 24, output a fire signal when each detection value exceeds a threshold value.

A control CPU 32 is provided in the receiver 10, and the control CPU 32 has a display section 38 and
Transmission input / output units 34a, 34 for exchanging signals with the terminals 14, 16, 18, 20 via the transmission line 12.
b, the line abnormality detection unit 36, the operation unit 42, the power supply unit 44 as shown in detail in FIG. The abnormality of the transmission line 12 is detected by the line abnormality detection unit 36, and a line abnormality signal is output to the control CPU 32. This track abnormality is displayed on the display unit 38.

The control CPU 32 has the terminals 14 and 1 in advance.
A series of terminal addresses Ai for 6, 18, and 20 are set, and at the time of normal polling for collecting terminal information via the transmission / output units 34a and 34b, a ringing signal including a terminal address and a ringing command is transmitted through the transmission line 12 Is sent to the terminal 1 at regular intervals (for example, every 2 to 3 seconds).
Calls 4, 16, 18 and 20 and returns terminal information.

When the calling signal or control signal from the receiver 10 is received by each of the terminals 14, 16, 18 and 20, the calling address included in the received signal and the own terminal address are collated and matched. If it is a call command, the terminal information held in the memory is transmitted to the receiver 10 as a terminal response signal. If it is a control command, the sensor test or control load 30
Drive.

The receiver 10 also sends each detection signal to the terminals 14, 16 and 18 which are the detectors during the call with the specified terminal address Ai, regardless of the terminal address Ai.
In order to sample by D conversion and hold in the built-in memory at the same time to instruct collective information collection processing, for example, 1
A sampling command (collective AD conversion command) is transmitted at a constant cycle every second.

On the other hand, when each terminal 14, 16, 18 determines the sampling command in the command field regardless of the address Ai, each terminal 14, 16, 18
The detection signal of the detector in AD is AD converted and stored in the built-in memory. The terminal data collected all at once based on such a sampling command is used as the terminal response information for the call signal in which the terminal address Ai is designated as the receiver 10.
Sent back to. Note that the present invention is not limited to the collective data collection by such a sampling command, and the data at the time of receiving the calling signal may be returned in real time.

Each terminal 14, 16 and 18 has a receiver 10
AD detection signal based on sampling command from
For example, when a fire is detected from the detection data when sampling is performed by the conversion, an interrupt signal for notifying the receiver 10 of the fire occurrence is transmitted using the terminal response timing. Further, when receiving the test command from the receiver 10, all the terminals 14, 16, 18, and 20 perform each test, and send normal data or failure / failure data to the receiver 10.

Next, the structure of the power supply section 44 will be described in detail with reference to FIG. For example, AC100V commercial power supply 100
Is connected to a transformer 50 via a power switch 48, and the transformer 50 converts 100 VAC into a predetermined voltage, for example. The output voltage of the transformer 50 is full-wave rectified by the diode bridge 52 and then smoothed by the smoothing capacitor 54 to obtain a main power supply of DC 24V, for example.

In this figure, control units 32a, 32b, 32c for controlling each of the plurality of transmission lines 12 are shown, and standby power supplies 60a, 60b, 60c for the control units 32a, 32b, 32c are shown. Is provided. On the secondary side of the transformer 50, backup power sources 60a, 60b, 6 are also provided.
A charging switch 51 and a diode bridge 53 are provided to charge 0c, and the standby power supplies 60a, 60b,
Each of the terminals 60c is replaceably connected to the diode bridge 53 side and each terminal b on the relay contacts 58a, 58b, 58c side via the connector C. The charging switch 51
Uses relay contacts, transistors, etc., and is closed except during standby power supply tests and power failures.

As shown in detail in FIG. 3, the DC voltage of the main power source is detected by a voltage detection circuit 46 which also serves as a power failure detection circuit. The voltage detection circuit 46 drives a power failure detection relay 58 when an abnormal voltage is detected. . The power failure detection relay 58 has relay contacts 58a, 58b, 58c provided according to the number of control units 32a to 32c.
Reference numerals 58b and 58c denote main power sources (terminal a side) or standby power sources 60a, 60b, and 60c (terminal b).
Side) is supplied to the control units 32a, 32b, 32c.

If, for example, AC200V exceeding the rating as the commercial power supply 100 is erroneously connected and the voltage of the main power supply becomes an overvoltage exceeding the normal range, the voltage detection circuit 46 detects this overvoltage and relays it. Contacts 58a, 58
The power failure detection relay 58 is driven so that b and 58c are connected to the standby power source (b side). Further, in this circuit, the + side of each of the standby power supplies 60a, 60b, and 60c is a standby power supply selection switch S1 to S3 such as a relay contact or a transistor.
, And the other ends of the switches S1 to S3 are commonly grounded via one pseudo load 61. The voltage across the pseudo load 61 is taken in by the A / D converter 62 in the control CPU 32 shown in FIG. 1 and detected by the test means 63.

The test means 63 is realized by a program of the control CPU 32, and the standby power supplies 60a, 60 are provided.
The display unit 38 capable of displaying the test results of b and 60c and the operation unit 42 including the test start switches (not shown) of the standby power supplies 60a, 60b, and 60c are connected. The test means 63 uses the switch 5 as shown in FIG.
The standby power supplies 60a, 60b, 60c are tested by turning off 1 and selectively turning on the switches S1 to S3 to detect the voltage across one pseudo load 61.

Next, the voltage detection circuit 46 will be described with reference to FIG. As an example, the voltage detection circuit 46 is configured to detect a normal voltage range of 20 to 30V, detect an abnormal low voltage of less than 20V and an overvoltage of 30V or more. A resistor R for detecting the upper limit value (= 30V) of the normal voltage range is provided at the subsequent stage of the smoothing capacitor 54.
1, R2, Zener diode ZD1 and transistor 7
0 is connected, and the applied voltage of the Zener diode ZD1 is 3
When the voltage exceeds 0V, the Zener diode ZD1 becomes conductive and the transistor 70 is turned on.

A resistor R3 for detecting the lower limit value (= 20 V) of the normal voltage range, a Zener diode ZD2, a resistor R4 and a transistor 72 are connected in the subsequent stage of the circuit (R1, R2, ZD1, 70). When the voltage applied to the Zener diode ZD2 exceeds 20V, the Zener diode ZD2 becomes conductive and the transistor 72 can be turned on, and the transistor 72 is on-biased by the divided voltage by the resistors R3 and R4. A power failure detection relay 58 is connected to the collector of the transistor 72, and a diode D1 is connected in parallel to the power failure detection relay 58 to absorb energy when the relay is off.

Next, the operation of the voltage detecting circuit 46 will be described. First, when the rated AC 100V is supplied to the commercial power supply 100 and the output voltage of the main power supply (a side) is within the normal voltage range of 20 to 30V, the Zener diode ZD1.
Is non-conductive, the Zener diode ZD2 is conductive, and the transistor 70 is turned off and the transistor 72 is turned on. Therefore, the power failure detection relay 58 becomes conductive and the relay contacts 58a, 58b, 58c are connected to the main power source (a side).

Next, when the commercial power supply 100 loses power and the output voltage of the main power supply (a side) becomes less than 20V, the Zener diode ZD2 which has been conducting until then becomes non-conducting together with the Zener diode ZD1 and the transistor 72 is turned on. When it is turned off, the power failure detection relay 58 becomes non-conductive and the relay contacts 58a, 58b, 58c are connected to the standby power supply (b side).

When a commercial power supply having a voltage exceeding the rating is erroneously connected and the output voltage of the main power supply (a side) exceeds 30 V, the Zener diode ZD1 which is in the non-conducting state in the normal voltage range becomes conductive. Then, the transistor 70 is turned on. When transistor 70 turns on, transistor 72
Is pulled to 0V and the transistor 72 is cut off. Therefore, the power failure detection relay 58 becomes non-conductive, and the relay contacts 58a, 58b, 58c are connected to the standby power source (b side).

FIG. 4 shows a power supply section 44a to the plurality of control sections 32a shown in FIG. 2 and a transmission input / output section 34 shown in FIG.
a and 34b, the power supply units 44 ₁₁ and 44 ₁₂ are shown, and the power supply units 44 ₁₁ and 44 ₁₂ are both the main power supply circuit and the standby power supply circuit as shown in FIG. Have. Each of the transmission lines 12a and 12b is composed of four lines (121 to 124), and each transmission input / output unit 34
From a and 34b, a transmitter confirmation line 121 is drawn out as a transmission line 12a and 12b through a transmitter confirmation terminal AA, and a power supply line 122 is drawn out through a power supply terminal V and a signal line terminal S. Signal line 123 is pulled out,
The common wire 124 is drawn out via the common terminal C.

The power supply (voltage V ₁₁ from the transmission input and output section 34a, 34b respectively, the power supply unit 44 _11, 44 _12,
V ₁₂ ) is supplied and its own power source and transmission lines 12a, 12
It is used as a power source of the terminal connected to the terminal b, and is controlled by the control units 32a and 32b via the buses 64a and 64b, respectively, to perform data transmission with each terminal via the transmission lines 12a and 12b.

Next, with reference to FIG. 5, the test operation of the standby power supply of the above embodiment, particularly the test operation of the test means 63 shown in FIG. 2 will be described. The test operation of the standby power supply starts when the test start switch of the operation unit 42 is operated. It should be noted that this test operation may be started automatically at predetermined time intervals using a timer. First, the counter S indicating the standby power source selection switches S1 to S3 is set to "1" (step S11), and then one of the standby power source selection switches S1 to S3 indicated by the value of the counter S is selectively turned on (step S11). S12).

Next, the charging switch 51 is turned off, the voltage across the pseudo load 61 is taken in through the A / D converter 62 (step S13), and it is determined whether the detected voltage is equal to or higher than a predetermined voltage. It is checked whether or not is normal (step S14). When the standby power supply is normal, the normal display is displayed on the display unit 38 (step S1).
5) On the other hand, in the case of an abnormality, the abnormality is displayed on the display unit 38 and an alarm sound is emitted (step S1).
6). Then, the counter S is incremented to test the next standby power supply (steps S17 → S18 → S1).
2) When all the standby power supplies 60a, 60b, 60c have been tested, this process ends.

Therefore, according to the above embodiment, a plurality of standby power sources 60a, 60b,
Since the test of 60c can be performed, the backup power source 60
The receiver 10 provided with a, 60b, and 60c can be configured to be small and inexpensive. In the above embodiment, the case where the standby power supplies 60a, 60b, 60c and the pseudo load 61 are provided on the receiver 10 side has been described, but the present invention can also be applied to the case where the repeater 14 is provided.

FIG. 6 shows another standby power supply test circuit, CP
U32 is a signal for turning off the charging switch 51 via the I / O port 66 during the standby power supply test and the standby power supplies 60a, 6
A signal designating 0b and 60c is output. The charging switch 51 and the standby power source selection switches S1 to S3 are respectively C
Decoders 65, 65a, 65b, and 50c that turn off the switch SW and selectively turn on the switches SWa, SWb, and SWc when the designated signal from the PU 32 is decoded and the designated signal addressed to itself is received. Have.

[0032]

As described above, according to the present invention, a main power source for supplying power from a commercial power source to a plurality of loads for disaster prevention monitoring, and a power source for supplying power to each of the plurality of loads when the commercial power source fails. A plurality of standby power supplies, a plurality of switch means for extracting respective currents from the plurality of backup power supplies, one pseudo load commonly connected to the plurality of switch means, and a plurality of the standby power supplies. During the test, one of the plurality of switch means is selectively turned on sequentially, and each of the plurality of standby power supplies is selectively and sequentially tested by detecting the voltage across the pseudo load when each switch means is on. Since it has a test means for controlling, it is not necessary to provide a pseudo load for each backup power supply even if a plurality of backup power supplies are provided, and therefore a receiver or relay board provided with a plurality of backup power supplies can be made compact. One can be inexpensive to construct.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a disaster prevention monitoring device according to the present invention.

FIG. 2 is a block diagram showing a power supply unit and a standby power supply test circuit of FIG.

FIG. 3 is a block diagram showing a voltage detection unit in FIG.

FIG. 4 is a block diagram showing a receiver including the power supply unit of FIG. 2 and a standby power supply test circuit.

FIG. 5 is a flowchart for explaining a preliminary power supply test process.

FIG. 6 is a block diagram showing another standby power supply test circuit.

[Explanation of symbols]

10: receiver 12: transmission line 14: sensor relay 16: analog smoke sensor 18: analog heat sensor 20: control relay 26: transmitter 28: control line 30: control load 32: control CPU 32a , 32b, 32c: control units 34a, 34b: transmission input / output unit 36: line abnormality detection unit 38: display unit 42: operation units 44, 44a, 44b, 44 ₁₁ , 44 ₁₂ : power supply unit 46: voltage detection unit 48: Power switch 50: Transformer 51: Charge switch 52, 53: Diode bridge 54: Smoothing capacitor 56: Power failure detection relays 58a, 58b, 58c: Relay contacts 60a, 60b, 60c: Standby power supply 61: Pseudo load 62: A / D Converter 63: test means 64a, 64b: buses 65, 65a, 65b, 65c: decoder 66: I / O ports 70, 72: transistor 100 Commercial power sources S1, S2, S3: Standby power source selection switches R1, R2, R3, R4: Resistors ZD1, ZD2: Zener diode 121: Transmitter confirmation line 122: Power source line 123: Signal line 124: Common lines SW, SWa, SWb , SWc: Switch

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G08B 17/00-31/00

Claims (4)

(57) [Claims] 1. A main power supply for supplying power from a commercial power supply to a plurality of loads for disaster prevention monitoring, a plurality of standby power supplies for supplying each power supply to the plurality of loads when the commercial power supply fails, and the plurality of power supplies. A plurality of switch means for selectively extracting each current from the standby power supply, one pseudo load commonly connected to the plurality of switch means, and a plurality of switch means of the plurality of switch means at the time of testing the plurality of standby power supplies. and selectively sequentially turned on one, consists of a testing means for selectively sequentially testing each of the plurality of standby power supply by the switch means detects the voltage across the dummy load when on, the The test means selectively designates each of the multiple standby power sources
Output signal, each of the plurality of switch means
Switch that selectively extracts each current from multiple standby power supplies
And decode the designated signal from the test means and
Deco that turns on the switch when a constant signal is received
Disaster prevention monitoring apparatus characterized by having a chromatography da. 2. The disaster prevention monitoring device according to claim 1, wherein the testing means starts a test of the standby power supply by operating a standby power supply test switch. 3. The disaster prevention monitoring device according to claim 1, wherein the testing means automatically starts a test of the standby power supply at a predetermined time by a timer. 4. The disaster prevention monitoring device according to claim 1, wherein the test means displays a test result for each of the plurality of standby power sources.