JPS6316800B2 - - Google Patents

Description

Detailed Description of the Invention The present invention connects a plurality of fire detectors, etc. to a pair of alarm wires, and when each detector detects a fire, etc., it oscillates a unique frequency that is different for each sensor, and The monitoring device is configured to be able to identify which sensor has activated by identifying the receiving frequency, and the activation of multiple sensors connected in the same way to multiple alarm lines can be detected using acoustic alarms. The present invention relates to a sensor operation display device for a monitoring device that monitors based on a combination of line number and reception frequency.

For example, fire alarm systems for buildings, etc.
It is necessary to place fire detectors, gas detectors, and other detectors in various locations, display the operating status of each terminal on a monitoring device, and centrally monitor the occurrence and spread of fires. In recent years, buildings have become larger and more complex, and as monitoring ranges have expanded, many sensors have been connected to a single alarm wire, each sensor is equipped with an oscillator with a different natural frequency, and monitoring equipment has been using alarm wire numbers and Large-scale monitoring devices are now being used that can identify areas where fires occur and alarm detectors based on combinations of frequencies. In such a large monitoring device, it is not desirable to provide indicator lamps or the like for all the sensors. Not only does the device become large and require a lot of space, but also having a large number of unnecessary lamps makes monitoring work difficult and may lead to erroneous judgment of the overall situation. Furthermore, monitoring such a large number of indicator lamps is not appropriate because the order in which they are activated becomes unclear. Therefore, in recent years, there has been a demand to be able to recognize the numbers and order of the operation sensors using a small number of display circuits. However, it is very difficult to meet the above requirements with the above-mentioned monitoring device in which all the sensors are not directly connected to the monitoring device.

An object of the present invention is to enable a fire alarm system that can display the number and alarm order of operating detectors with a simple configuration in a monitoring device in which a large number of alarm lines each having a plurality of sensors that oscillate a natural frequency are connected. The purpose of the present invention is to provide a display device such as a sensor.

The display device of the present invention includes: a first scanning unit that scans a plurality of alarm lines; an address branching unit that branches an output signal of the first scanning unit using a bandpass filter;
a second scanning unit that scans the output line of the address branching unit; a shift register that is operated by the output of an AND circuit to be described later when the output signal of the second scanning unit is input; and an output signal of the shift register. a plurality of alarm line number latch circuits that latch the alarm line numbers to which the first scanning section is connected; and a filter to which the second scanning section is connected according to the output signal of the shift register. a plurality of filter number latch circuits for latching numbers; a plurality of alarm line number check circuits for respectively comparing the line number being scanned by the first scanning section with the contents of the alarm line number latch circuit; a plurality of filter number check circuits that respectively compare the filter numbers being scanned by the second scanning unit with the contents of the filter number latch circuit; and an output of the alarm line number check circuit and the filter number. a plurality of double number check circuits each inputting the outputs of the check circuits and checking whether the numbers match or do not match;
a logic circuit that outputs an output signal when all the output signals of the two-way number check circuit are mismatch signals or when there is one or more match signals; and a display section that displays the contents of each of the latch circuits. The above object is achieved by configuring the shift register to be operated by the output signal of the logic circuit.

Next, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a connection diagram showing one embodiment of the present invention. That is, the alarm lines L ₁ to _{L o} are connected to the first scanning unit 1.
The first scanning unit 1 sequentially connects the alarm lines L ₁ to _{I o}
is scanned, alternatively selected, and connected to the address branching section 2. The address branch section 2 is a branch line formed by connecting many bandpass filters in parallel that pass the natural frequency.
Branch into B ₁ to _{B n} and connect to the output terminal. The branch lines B ₁ to _{B n} are scanned by the second scanning unit 3 and are selectively selected and connected to the shift register 4 .

On the other hand, the alarm line number to which the first scanning section 1 is connected is converted into, for example, a BCD code and connected to alarm line number latch circuits 5, 5' and alarm line number check circuits 6, 6'. Alarm wire number latch circuit 5
The contents are displayed on the display circuit 7, which is also connected to the alarm line number check circuit 6. The check circuit 6 compares the alarm line number sent from the first scanning section with the contents of the alarm line number latch circuit 5, and outputs an output signal if they do not match. Further, the alarm line number latch circuit 5 stores and holds the alarm line number sent from the first scanning section in response to a latch signal from the _Q1 terminal of the shift register 4. Alarm line number latch circuit 5'
performs a similar operation in response to a latch signal from the _Q2 terminal of the shift register 4.

Further, the filter number to which the second scanning unit 3 is connected is determined by the filter number latch circuit 8,
8' and filter number check circuits 9 and 9'. The contents of the latch circuits 8, 8' are sent to the check circuits 9, 9' and are simultaneously displayed on the display circuits 10, 10'. The filter number check circuit 9
The filter number sent from the scanning section is compared with the contents of the filter number latch circuit 8, and if they do not match, an output signal is output. The same applies to the check circuit 9'.

The output signals of the alarm line number check circuit 6 and the filter number check circuit 9 are input to the OR circuit 11, and the output signals of the check circuits 6' and 9' are input to the OR circuit 11'. In this embodiment, the OR circuit 11 constitutes a double number check circuit that checks whether both the alarm line number and the filter number match. The same applies to the OR circuit 11'. The output signals of OR circuits 11 and 11' are connected to AND circuit 1.
2, and the output signal of the AND circuit 12 provides a shift signal to the shift register 4. When the shift register 4 receives the output signal of the second scanning section 3 while the shift signal is being input, it outputs a latch signal from the output terminal _Q1 and sends it to the latch circuits 5 and 8, and then, When the output signal of the second scanning section is applied and the shift signal is received from the AND circuit 12, a latch signal is output from the output terminal _Q2 . At the next similar time, an output signal is output to the output terminal _Q3 , and a signal overlamp (not shown) is lit.

With the above configuration, when any one sensor is activated, the line number and filter number to which that sensor is connected are displayed on the display circuits 7 and 10. Since the next activated sensor is displayed on the display circuits 7' and 10', the number and order of the activated sensor can be recognized. If a display circuit or the like is further added, the operations of three to five sensors can be displayed in the same way. When the same sensor is scanned again, the shift register does not operate because the AND circuit 12 does not output a shift signal. Therefore, the same sensor will not be displayed again.

The first scanning section is configured as shown in FIG. 2, for example. That is, the clock pulse oscillator 21 oscillates clock pulses with a constant period. When a contact rf of a fire relay (not shown) is closed, the gate 22 is opened. The output of gate 22 is the output of gate 23
(which is always open) to the counter 24. The counter 24 counts the input pulses and converts them into, for example, a BCD code, which is sent to the selector 25.
send to The input side of the selector 25 has an alarm line L ₁ ~
_Lo is connected. The selector 25 decodes the BCD code sent from the counter 24 and connects the corresponding input terminal to the output terminal, and the sensing signal from the input line is sent to the address branch 2 (see FIG. 1). At the same time, the sensing signal detection circuit 26
The presence or absence of the sensing signal is detected by the , and when the sensing signal is detected, the gate 23 is closed. The gate 23 is then kept closed until it is opened again, for example, by a scan end signal from the second scanning section 3. As a result, the connected alarm line is not moved to the next alarm line until the second scanning section finishes scanning the connected alarm line. The gate 23 may be configured to be opened again after a certain delay time, for example. In this case, a scan end signal for the second scanning section is not required, so the circuit can be simple. Further, the output code of the counter 24 is sent to the alarm line number latch circuits 5, 5' and the alarm line number check circuits 6, 6', as described in FIG.

Next, the second scanning section 3 is configured as shown in FIG. 3, for example. That is, the gate 22
The output pulse of is passed through the gate 31 to the counter 32
give to The gate 31 is a gate that is opened when there is a sensing signal in the output of the first scanning section 1, and is normally closed. Therefore, when there is no sensing signal in the output of the scanning section 1, the second scanning section does not operate and only the first scanning section performs the scanning operation. 1st
When the sensing signal is connected to the existing alarm line by the scanning of the scanning unit, the gate 31 is opened. Then, a clock pulse is given to the counter 32,
The counter 32 outputs, for example, a BCD code and sends it to the selector 33. The selector 33 decodes the BCD code and connects the input line with the corresponding number to the output line. The output line is connected to a shift register 4 as shown in FIG. Also, counter 3
2 outputs a scanning end signal when it finishes counting,
It is sent to the gate 23 of the first scanning section and opened.

Next, the operation of this embodiment will be explained with reference to FIGS. 1 to 3. First, it is assumed that a sensor with a frequency f ₂ connected to the alarm line L ₂ is activated. When a fire relay (not shown) is activated by the operation of the sensor and its contact rf is closed, the gate 22 is opened and the clock pulses are counted by the counter 24. When the count value is "1", the selector 25 selects the alarm line _L1 , but since there is no sensing signal on the alarm line _L1 , the gate 23 remains open. Then, when the count value becomes "2" and the alarm line L ₂ is selected, since there is a sensing signal on the alarm line L ₂ , the detection circuit 26 detects this and switches the gate 2.
3 and the first scanning section stops scanning. Meanwhile, the gate 31 of the second scanning section opens and the counter 32 starts counting clock pulses. When the count value becomes "2" and the output line _B2 of the address branching section 2 is selected, a sensing signal is detected at the output side of the selector 33. This is sent to the shift register 4 as is or after waveform shaping. At this time,
Since the check circuits 6, 6', 9, and 9' all output non-coincidence signals, the AND circuit 12 outputs an output signal. As a result, the shift register 4 outputs a latch signal from the first output terminal _Q1 and sends it to the alarm line number latch circuit 5 and the filter number latch circuit 8. The alarm line number latch circuit 5 latches the alarm line number "2" and displays it on the display circuit 7. The filter number latch circuit 8 latches the filter number "2" and displays it on the display circuit 10.

Next, when the second scanning section 3 finishes scanning, the counter 32 (shown in FIG. 3) sends out a scan end signal to open the gate 23 (see FIG. 2), and the counter 24 resumes counting the clock pulses. Then, the selector 25 scans the alarm line. After one round of scanning, the counter 24 is reset and the scanning is repeated many times. When the alarm line L ₂ is scanned and the second filter is selected, a sensing signal is sent to the shift register 4 from the second scanning section. However, at this time, since the alarm line number check circuit 6 and the filter number check circuit 9 are not outputting a mismatch signal (the comparison contents match), the OR circuit 11
There is no output from the AND circuit 12, therefore, there is no output from the AND circuit 12. Therefore, no latch or the like is performed and the signal passes through as is. Then, the above operation is repeated for scanning as many times as necessary.

Next, for example, if a sensor with frequency f ₃ of alarm line L ₄ is activated, the first scanning unit connects alarm line L ₄ , and the second scanning unit selects the third filter. At this time, a sensing signal is sent from the second scanning section to the register 4. At this time, since the line number check circuits 6, 6' and the filter number check circuits 9, 9' are all inconsistent, the AND circuit 12 outputs an output signal and supplies a shift signal to the shift register 4. As a result, the output terminal of shift register 4
A latch signal is output from _Q2 and sent to the alarm line number latch circuit 5' and the filter number latch circuit 8'. These latch circuits latch their respective numbers. After that, scanning is repeated as many times as described above. This allows the observer to know which sensor operated second.

Next, for example, if the sensor of the frequency f ₁ of the alarm line L ₁ is activated, when the first and second scanning units scan the corresponding number, the shift register 4 is activated by the same operation as described above. A signal over signal is output from output terminal _Q3 . This signal lights up a signal over lamp (not shown). This allows the observer to know that there are other activated sensors in addition to the displayed sensor.

Further, the oscillation of the clock pulse oscillator 21 (see FIG. _{2) is stopped for a certain period of time by a signal from the output terminal Q2 of the shift register 4} , and the shift register 4 is stopped after the certain period of time (for example, about 5 seconds). By providing a delay circuit for resetting, the next time L ₁ and f ₁ are scanned, the shift register will output a latch signal from Q ₁ and display the operation of the sensor of the above-mentioned alarm line L ₁ frequency f ₁ . can. When a large number of sensors are activated, the previous display is sequentially rewritten and displayed.

In order to stop the oscillation of the clock pulse oscillator 21 and operate the delay circuit, a manual switch is provided, and if the above-mentioned operation is performed only when the switch is switched, the alarm sensor is always activated. It is possible to display the number and order of the alarm sensors and to display the alarm sensors in sequence by switching the switch. This is extremely convenient because any display can be displayed at the discretion of the supervisor depending on the situation of a fire, etc.

As described above, in the present invention, the first scanning section that scans the alarm line and the second scanning section that scans the filter are provided, and the alarm line of the alarm sensor is scanned in succession. The number and filter number are latched and displayed, and the scanning alarm line and filter number are compared with the contents of the latch circuit, and only when they do not match, another latch circuit is latched and displayed. Since it has been configured, it is possible to use a simplified and simplified configuration through a large number of alarm wires connected to a large number of sensors.
You can know the number and order of alarm detectors. In the event of a fire or the like, it has the tremendous effect of enabling effective and appropriate judgment and prompt treatment.

[Brief explanation of the drawing]

FIG. 1 is a connection diagram showing an embodiment of the present invention, FIG. 2 is a block diagram showing an example of the first scanning section used in the above embodiment, and FIG. 3 is an example of the second scanning section. FIG. In the figure, 1...first scanning section, 2...address branching section, 3...second scanning section, 4...shift register, 5, 5'...warning line number latch circuit,
6, 6'...Alarm line number check circuit, 7, 7',
10, 10'... Display circuit, 8, 8'... Filter number latch circuit, 9, 9'... Filter number check circuit, 11, 11'... OR circuit, 12... AND circuit, 22, 23, 31...gate, 24, 3
2... Counter, 25, 33... Selector, 26
...Sensing signal detection circuit.

Claims (1)

[Scope of Claims] 1. A plurality of alarm wires each connected to a plurality of fire detectors, etc., which oscillate a unique frequency when a fire is detected, are connected, and activated fire detectors, etc. are identified by the number of the alarm wire and the In an operation display device such as a fire detector that is identified based on a natural frequency, a first scanning section that scans the plurality of warning lines, and an output signal of the first scanning section are input and each of the specific frequencies is passed through. An address branching section in which bandpass filters are connected in parallel, a second scanning section that scans the output line of the address branching section, and an output signal of a logic circuit to which the output signal of the second scanning section is input and will be described later. a shift register operated by a shift register, and a plurality of alarm line number latch circuits that latch alarm line numbers connected to the first scanning section according to an output signal of the shift register;
The output signal of the shift register causes the second
a plurality of filter number latch circuits for latching connected filter numbers; and a plurality of filter number latch circuits for respectively comparing the line number being scanned by the first scanning unit with the contents of the alarm line number latch circuit. a plurality of filter number check circuits that respectively compare the filter number being scanned by the second scanning unit with the contents of the filter number latch circuit; and the alarm line number a double number check circuit which inputs the output of the check circuit and the output of the filter number check circuit, and checks whether they match or not;
a logic circuit that outputs an output signal when all the output signals of the two-way number check circuit are mismatch signals or when there is one or more match signals; and a display section that displays the contents of each of the latch circuits. An operation display device for a fire detector or the like, comprising: an output signal from the logic circuit to operate the shift register. 2. In the operation display device for a fire detector or the like as set forth in claim 1, when the first scanning section receives a sensing signal from the alarm line that is being scanned, it stops scanning, and the second scanning section stops scanning. A device characterized by starting scanning again in response to an end signal. 3. In the operation display device for a fire detector or the like as set forth in claim 1, the first scanning section stops scanning when it receives a sensing signal from the alarm line that is being scanned, and starts scanning again after a certain period of time. something that is characterized by 4. In the operation display device for a fire detector or the like as set forth in claim 1, 2, or 3, the shift register outputs a signal over signal when a shift operation exceeds a predetermined number. something that is characterized by 5. In the operation display device for a fire detector or the like according to claim 1, 2 or 3, the shift register applies a latch signal to the final stage latch circuit and at the same time provides the latch signal to the first latch circuit for a certain period of time. The present invention is characterized by comprising a delay circuit that stops the scanning of the scanning section and the second scanning section and resets the shift register after the predetermined period of time. 6. The operation display device for a fire detector or the like as set forth in claim 5, characterized by comprising a manual switch for opening and closing the stop signal and delay circuit of the scanning section.