JP4884037B2 - Monitoring and control system, sensor, program and recording medium - Google Patents

Description

  The present invention relates to a monitoring control system, a sensor, a program, and a recording medium.

  Conventionally, for example, a monitoring control system as shown in Patent Document 1 is known. FIG. 11 is a diagram illustrating a configuration example of the monitoring control system disclosed in Patent Document 1. In FIG. Referring to FIG. 11, this monitoring control system (for example, a fire alarm system) includes an addressable P-type receiver 1 and a sensor (on / off-type sensor) that can be directly connected to a transmission line 3 extending from the P-type receiver 1. 2-1 to 2-n.

Next, the processing operation of the sensor and monitoring control system having such a configuration will be described with reference to FIG. FIG. 12 is a diagram showing the potential between L and C of the transmission line 3. Referring to FIG. 12, the receiver 1 normally holds the potential between L and C of the transmission line 3 at 24 V, and at least one of the sensors 2-1 to 2-n ( For example, when 2-3) is activated (turned on), the activated sensor 2-3 sets the potential between L and C to an on level of 5 V and informs the receiver 1 that there is an activated sensor. I can tell you. Then, at least one of the sensors 2-1 to 2-n is activated (turned on), and the receiver is informed that the potential between the L and C of the transmission line 3 has become the on level 5V. When 1 is detected, the receiver 1 performs a sensor address response. That is, the address search pulse is generated using the potential of the short circuit level (0 V) and the on level (5 V) of the sensor, and is sent to each of the sensors 2-1 to 2-n. Specifically, the receiver 1 sends the first address search pulse PS ₁ to each of the sensors 2-1 to 2-n via the transmission line 3 using the potentials of 0V and 5V. then, a second address search pulses PS ₂ through the transmission path 3 is sent to the respective detectors 2-1 to 2-n, then each sensing via the transmission path 3 a third address search pulses PS ₃ The address search pulses are sequentially sent out such as being sent to the devices 2-1 to 2-n. These address search pulses are sequentially received by the sensors 2-1 to 2-n.

  In this case, addresses corresponding to the sensors 2-1 to 2-n are set, and the sensors 2-1 to 2-n are sequentially transmitted from the receiver 1 as described above. The number of address search pulses counted is counted, and it is determined whether or not the counted number of address search pulses matches the address set for itself. (OFF state) is sent back to the receiver 1 via the transmission line 3. That is, when it matches with its own address, and when its own state is the on state (operating state), after receiving the address search pulse, this sensor sets the potential between L and C of the transmission line 3 for a predetermined period. When the voltage does not coincide with its own address, the sensor performs the above-described control on the potential between L and C of the transmission line 3. Don't do it. As a result, the receiver 1 monitors whether the potential between the L and C of the transmission line 3 is maintained at 0 V for a predetermined period, and the potential between the L and C of the transmission line 3 is 0 V for the predetermined period. In this state, it can be specified that the sensor having an address corresponding to the number of address search pulses transmitted so far is in the operating state (ON state). In the present example, since the sensor 2-3 is in an operating state (ON state), the sensor 2-3 maintains the potential between the L and C of the transmission line 3 at 0 V (short circuit state) for a predetermined period. To do. Accordingly, the receiver 1 can detect that the sensor 2-3 having the address “3” corresponding to the number “3” of address search pulses transmitted so far has been activated.

JP-A-10-188154

  As described above, in the conventional supervisory control system as described above, in order to search for the activated sensor, the activated (reported) sensor is kept in the activated state, and the operating level (5 V) is short-circuited. A search pulse is sent between the level (0V) and the activated sensor is specified, and there is a problem that a large amount of current is consumed when searching for the activated sensor.

  An object of the present invention is to provide a supervisory control system, a sensor, a program, and a recording medium capable of reducing current consumption when searching for an activated sensor as compared with the prior art.

  In order to achieve the above object, according to the first aspect of the present invention, a sensor is connected to a sensor line extending from the supervisory control device, and the supervisory control device includes a sensor connected to the sensor line. In the supervisory control system that sends a notification search signal to the sensor line (alarm line) that has received the notification signal when receiving the notification signal (operation signal), the sensor transmits the notification signal. Sometimes, the consumption current in the sensor is set to a predetermined holding current larger than that in the monitoring state (the line voltage is set to, for example, an operating level (for example, 5 V)), and when the alarm search signal is received from the monitoring control device, The current consumption in the sensor is reduced (so that the alarm search is performed by setting the peak voltage of at least some of the pulses of the alarm search signal higher than the line voltage (for example, the operating level) when the alarm signal is sent). Send alert signal When responding to the alarm search signal, the search response signal is transmitted by returning the current consumption in the sensor to the hold current (returning the line voltage to, for example, the operating level). It is characterized by having.

  According to a second aspect of the present invention, in the supervisory control system according to the first aspect, the notification search signal includes a command transmission unit and a response return unit. After receiving the transmitting unit (so that the alarm search is performed by setting the peak voltage of the pulse signal of the response returning unit to be higher than the line voltage at the time of transmitting the alarm signal (for example, the operating level (for example, 5V)) When the consumption current in the sensor is made smaller than the holding current at the time of sending the alarm signal and responding to a predetermined pulse signal of the response return unit, the consumption current in the sensor is returned to the holding current (line voltage). A search response signal is sent out (returning to the operating level, for example).

  In the invention according to claim 3, a sensor is connected to a sensor line extending from the monitoring and control device. When the sensor connected to the sensor line detects an abnormality such as a fire, the sensor circuit is activated. When an alarm signal (actuation signal) is sent and the supervisory control device receives an alarm signal (actuation signal) from a sensor connected to the sensor line, the sensor line (alarm signal) that received the alarm signal Line) is restored to a monitoring state, and when a warning signal (operation signal) is received from the alarm line again within a predetermined time, it is determined that an abnormality such as a fire has occurred in the alarm line, In the supervisory control system for sending the alert search signal to the alert line, when sending the alert signal, the sensor sets the consumption current in the sensor to a predetermined holding current larger than that in the monitoring state, and Notification search signal from the monitoring and control device When a notification is received, the alarm search is performed (so that the alarm search is performed with the peak voltage of at least some of the pulses of the alarm search signal being higher than the line voltage (eg, operating level) at the time of the alarm signal transmission). The current consumption in the sensor is made smaller than the holding current at the time of sending the alarm signal, and when responding to the alarm search signal, the current consumption in the sensor is returned to the holding current (the line voltage is returned to the operating level, for example). A search response signal is transmitted.

Further, an invention according to claim 4, wherein, in the monitoring control system according to claim 2, wherein the predetermined pulse signal of the response returning unit, and a short-circuit voltage B Ureberu (short level), a high level (peak voltage) monitoring It is characterized by an hourly voltage (monitoring level).

  According to a fifth aspect of the present invention, in the supervisory control system according to any one of the first to fourth aspects, the sensor has a storage unit, and the sensor issues a notification (operation). In this case, the event information of the notification is stored in the storage unit.

  According to a sixth aspect of the present invention, in the supervisory control system according to any one of the first to fifth aspects, the sensor receives the notification search signal and performs a notification search. Sometimes, it is characterized in that it is determined whether or not to output a search response signal based on whether or not the event information of the alert is stored in the storage unit.

  The invention according to claim 7 is the supervisory control system according to any one of claims 1 to 6, wherein the sensor is stored in the storage unit after an alarm search is performed. When alarming event information is stored, based on this, the consumption current in the sensor is returned to the holding current (the line voltage is returned to, for example, the operating level), and the alarming line is sent an alarm signal. It is characterized by recovery to the state of time.

  The invention according to claim 8 is a sensor connected to a sensor line extending from the monitoring control device, and the sensor monitors the current consumption in the sensor when sending the alarm signal. When a predetermined holding current larger than that in the state is set (the line voltage is set to an operating level, for example), and when an alarm search signal is received from the supervisory control device, the peak voltage of at least some pulses of the alarm search signal The current consumption in the sensor is made smaller than the holding current at the time of sending the alarm signal, so that the alarm search is performed with a higher voltage than the line voltage at the time of sending the alarm signal (for example, the operating level). When responding to the information search signal, the current consumption in the sensor is returned to the holding current (the line voltage is returned to the operating level, for example), and the search response signal is transmitted.

  Further, the invention according to claim 9 is the sensor according to claim 8, wherein the sensor has a storage unit, and when the alarm is issued (actuated), event information of the alarm is stored in the memory unit. It is characterized by memorizing.

  The tenth aspect of the present invention is the sensor according to the eighth or ninth aspect, wherein when the alarm search signal is received and the alarm search is performed, the sensor issues a notification to the storage unit. Whether or not to output a search response signal is determined based on whether or not event information of the information is stored.

  The invention described in claim 11 is the sensor according to any one of claims 8 to 10, wherein the sensor is configured to store the alarm in the storage unit after an alarm search is performed. When notification event information is stored, based on this, the current consumption in the sensor is returned to the holding current (the line voltage is returned to, for example, the operating level), and the notification line is sent through the notification signal. It is characterized by being restored to the state.

  According to a twelfth aspect of the present invention, there is provided a program for causing a computer to execute a control process of a sensor connected to a sensor line extending from a supervisory control device. Is set to a predetermined holding current larger than that in the monitoring state (the line voltage is set to, for example, an operating level (for example, 5 V)), and when an alarm search signal is received from the monitoring control device, Send current signal in sensor so that peak search of at least some of the pulses of the signal is higher than the line voltage (eg, operating level) at the time of sending the warning signal, so When responding to the alert search signal, the search current signal is returned to the hold current (the line voltage is returned to the operating level, for example) and a search response signal is sent. Is a program for realizing the control process of the sensor to the computer.

  The invention according to claim 13 is a computer-readable recording medium storing a program for causing a computer to execute control processing of a sensor connected to a sensor line extending from a monitoring control device, When sending the alarm signal, the current consumption in the sensor is set to a predetermined holding current larger than that in the monitoring state (the line voltage is set to, for example, an operating level (for example, 5 V)), and the alarm search is performed from the monitoring control device. When a signal is received, detection is performed (so that the alarm search is performed with the peak voltage of at least some of the pulses of the alarm search signal being higher than the line voltage (eg, operating level) at the time of the alarm signal transmission). The current consumption in the detector is made smaller than the holding current at the time of sending the alarm signal, and when responding to the alarm search signal, the current consumption in the sensor is returned to the holding current (the line voltage is reduced). Example, if returned to the operating level) is readable recording medium recording a computer program for executing a control process sensor for transmitting a search response signal to the computer.

According to the first to thirteenth inventions, a sensor is connected to a sensor line extending from a supervisory control device (for example, a receiver or a repeater), and the supervisory control device is connected to the sensor line. When an alarm signal (actuation signal) is sent from the sensor being received and received, the alarm signal is received (when the monitoring control device is a receiver, alarm processing is performed). In the supervisory control system for sending an alarm search signal to a sensor line (alarm line), when the alarm signal is sent, the sensor keeps the current consumption in the sensor larger than that in the monitoring state. When the current is set (for example, the line voltage is set to the operating level) and the alarm search signal is received from the monitoring control device, the peak voltage of at least a part of the pulses of the alarm search signal is set to the line when the alarm signal is transmitted Voltage (for example, To make the alarm search higher than the operation level), the current consumption in the sensor is made smaller than the holding current at the time of sending the alarm signal and in response to the alarm search signal, The search response signal is transmitted by returning the current consumption to the holding current (returning the line voltage to, for example, the operating level), and when the alarm search is performed, except when responding to the alarm search signal Since the current consumption in the sensor is small (in fact, the current consumption does not flow in the sensor), the current consumption when searching for the activated sensor compared to the conventional Can be reduced.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a configuration example of a monitoring control system according to the present invention. Referring to FIG. 1, this monitoring control system (for example, a fire alarm system or a crime prevention system) includes a monitoring control device 11 and a sensor (for example, an on / off type sensor) connected to a sensor line 13 from the monitoring control device 11. ) 12-1 to 12-n.

  Here, the monitoring control device 11 is, for example, a receiver (for example, an addressable P-type receiver) or a repeater. Further, FIG. 1 shows only the case where one sensor line 13 extends from the supervisory control device 11, but in actuality, although not shown, the supervisory control device 11 connects the sensor line 13. In addition, several sensor lines are extended, and sensors are similarly connected to these sensor lines. In the following description, for convenience of explanation, only the sensor line 13 and the sensors 12-1 to 12-n connected to the sensor line 13 will be described.

  The sensors 12-1 to 12-n are, for example, fire sensors, and in this case, the monitoring control system functions as a fire alarm system. The sensors 12-1 to 12-n may be other than the fire sensor. That is, the sensors 12-1 to 12-n may be security detectors, for example, and in this case, the monitoring control system functions as a security system.

  FIG. 2 is a diagram illustrating a configuration example of one sensor, for example, 12-1. In the example of FIG. 2, the sensor (on / off type sensor) detects a physical quantity such as smoke density and converts it into an electrical signal (analog signal), and is output from the physical quantity detection unit 21. A / D converter 22 that samples an analog signal to be converted into a digital signal by sampling at a predetermined period, an address unit 23 in which the address (self address) of the sensor is set, and abnormality (for example, fire) judgment and transmission A CPU 24 that controls the entire sensor such as control, a ROM 25 that stores a control program of the CPU 24, a RAM 26 that is used as various work areas, etc., and event information for alarming (operation), for example, are stored. And a physical quantity detection result (from the A / D conversion section 22) detected by the physical quantity detection section 21 and converted into a digital signal by the A / D conversion section 22. For example, when the CPU 24 determines that an abnormality such as a fire has occurred when the output level exceeds a predetermined operation threshold level (for example, a fire level), the signal (operation signal (sound signal generation state)) And an operation signal output unit 29 for outputting an alarm signal)) to the sensor line 13. Here, the alarm (operation) is to output a fire detection signal when the sensor is a fire sensor, and the operation state (alarm state or on state) is a sensor. If is a fire detector, it is a fire detection state, and the activation signal (alarm signal) is a fire detection signal if the detector is a fire detector, The operation signal output unit is a fire detection signal output unit when the sensor is a fire sensor. A normal state before the sensor detects an abnormality (before outputting an operation signal (alarm signal) to the sensor line 13) is referred to as a monitoring state.

  In the system of FIG. 1, the sensor line 13 is constituted by, for example, L and C lines. In this case, in this system, the monitoring level is set to, for example, the potential (line) between the L and C of the sensor line 13. Voltage) is set at 24V, the operating level of the sensor is set at, for example, a potential between L and C (line voltage) at 5V, and the short-circuit level is set at, for example, a potential between L and C ( The line voltage can be set to 0V.

  Corresponding to such a system configuration, the operation signal output unit 29 of the sensor of FIG. 2 outputs a potential (L and C) of the sensor line 13 as a signal indicating the operation state (ON state) of the sensor. Line voltage) is set to an operating level of 5V.

  Here, for example, a circuit using a transistor (for example, a bipolar transistor) as shown in FIG. 3 is used as the operation signal output unit 29. By turning on a signal to the base of this transistor, the operation signal is output. Can be output (the sensor can be activated) and the line voltage can be brought to an operational level (5V). On the other hand, by turning off the signal to the base of this transistor, the operation signal (operation state) can be released. At this time, when the transistors of other sensors are not turned on, the line voltage is monitored. It becomes level (24V).

  In addition to the circuit configuration as shown in FIG. 3, the operation signal output unit 29 may have a circuit configuration as shown in FIG. 4, FIG. 5, or FIG. Here, in FIG. 4 and FIG. 6, a Zener diode is used instead of a resistor, and in FIG. 5 and FIG. 6, a light emitting diode is used, and the sensor is activated (reported). Can be displayed.

  In the example of FIGS. 3, 4, 5, and 6, the transistor is a bipolar transistor, but can be a MOS transistor.

  Further, as a transmission method performed between the supervisory control device 11 and the sensors 12-1 to 12-n, as shown in FIG. 7, a method composed of a command transmission unit and a response return unit is used. .

Here, the command transmission unit is for transmitting a predetermined command from the monitoring control device 11 to the sensors 12-1 to 12-n, and includes a sensor wake-up signal, a start bit signal, an address, a command, It consists of parameters and checksum (for example, FIG. 10). The format (basic format) after the start bit signal of the command transmission unit is as shown in FIG. In FIG. 8, the first byte is a sensor address, and when “FF” is designated, it becomes a global address, which is a command for all connected sensors. The second byte is a command, and a command for the sensor is designated. The third byte is a parameter, and a command parameter is designated. The fourth byte is a check SUM, and the check SUM is a numerical value for confirming whether communication is performed correctly, and is calculated by the following equation in the transmission interval.
Check SUM = 1st byte + 2nd byte + 3rd byte

  In addition, the response return unit searches for the sensor whose command type is the sensor connection check command (command for checking disconnection), sensor test command, and sensor search command (actuated (reported)). )), A sensor address response is made.

  Here, the sensor address response is a basic pulse after the start bit signal of the response return unit (also in the response return unit, the basic pulse is transmitted from the monitoring control device 11 to the sensors 12-1 to 12-n). One by one is assigned to the addresses of the sensors 12-1 to 12-n, the sensors 12-1 to 12-n count the number of basic pulses, and the number of basic pulses is set in the address section 23. If it is operating (reporting) when it matches the self-address, it responds by sending back an operation signal. Assuming there is a 32-bit pulse in the basic pulse, the supervisory control device can receive responses from 32 sensors at a time. A sensor that is not activated (notified) does not respond (return) even if it matches the self address.

  By the way, in the present invention, a sensor is connected to a sensor line (only one sensor line 13 is shown in FIG. 1) extending from the supervisory control device 11 (for example, a receiver or a repeater). When the device 11 receives the alarm signal (actuation signal) from the sensor connected to the sensor line (when the monitoring and control device 11 is a receiver, it performs an alarm process), the alarm signal In the supervisory control system for sending the alert search signal to the sensor line (alarm line) that has received the alarm, the sensor has a larger current consumption in the sensor than in the monitoring state when the alert signal is sent. When a predetermined holding current is set (the line voltage is set to, for example, an operating level (for example, 5 V)) and an alarm search signal is received from the monitoring control device 11, the peak of at least a part of the pulse of the alarm search signal is set. The current consumption in the sensor is determined from the holding current at the time of sending the alarm signal so that the alarm search is performed with the pressure higher than the line voltage at the time of sending the alarm signal (for example, the operation level (for example, 5V)). When responding to the alarm search signal, the current consumption in the sensor is returned to the holding current (the line voltage is returned to, for example, the operating level (for example, 5V)), and the search response signal is transmitted. It is characterized by having. Note that, as described above, the alarm signal (operation signal) is a fire detection signal when the sensor is a fire sensor.

  Here, the notification search signal includes a command transmission unit and a response return unit, and the sensor that has transmitted the notification signal receives the command transmission unit and then receives the peak voltage of the pulse signal of the response return unit. The current consumption in the sensor is set to be higher than the line voltage at the time of sending the alarm signal (for example, so that the alarm search is performed with the line voltage higher than the operating level (for example, 5V)) When responding to a predetermined pulse signal of the response returning unit, the current consumption in the sensor is returned to the holding current (the line voltage is returned to, for example, the operating level (for example, 5V)) and a search response signal is transmitted. It is supposed to be.

  Further, in the alert search, specifically, the low level of the alert search signal pulse is set to a short-circuit voltage (short-circuit level (0V)), and the high-level (peak voltage) is set to a sensor line voltage (for example, the monitor level ( For example, it is performed as 24V)).

  Further, when the sensor issues a report (activates), the event information of the report is stored in the storage unit 27. Note that the notification (operation) is to output a fire detection signal when the sensor is a fire sensor as described above.

  The sensor outputs a search response signal based on whether or not the event information of the alarm is stored in the storage unit 27 when the alarm search is performed upon receiving the alarm search signal. It is determined whether or not.

  Then, after the alarm search is performed, the sensor returns the current consumption in the sensor to the holding current based on this when the event information of the alarm is stored in the storage unit 27. (The line voltage is returned to the operating level, for example) and the alarm line is restored to the state when the alarm signal is transmitted.

  FIG. 9 is a diagram for explaining a processing operation when a certain sensor is activated (reported) in the monitoring control system of the present invention as described above. 9A shows the line voltage of the sensor line to which this sensor is connected, and FIG. 9B shows the transistor of the activation signal output unit 29 of the activated sensor. Indicates an on / off state.

  Referring to FIG. 9A, in the initial state, the line voltage is at the monitoring level (24V). In this state, if a sensor detects, for example, a fire and operates (reports), the transistor of the operation signal output unit 29 of the sensor is turned on, and the line voltage of the sensor line to which the sensor is connected is turned on. Decreases from the monitoring level (24V) to the operating level (5V), and this is sent to the monitoring control device 11 as an operating signal (alarm signal).

  When the supervisory control device 11 receives this operation signal (alarm signal) (that is, when it is detected that the line voltage of a certain sensor line (alarm line) has reached the operation level (5 V)), the supervisory control device 11 Sends an alarm search signal (alarm search pulse) to this sensor line (alarm line). The structure of this alarm search signal (alarm search pulse) is divided into a command transmission unit and a response return unit, and the supervisory control device first transmits the command transmission unit to the sensor line (currently). If so, send a motion sensor search command).

  The sensor that has been activated (reported) maintains the transistor of the activation signal output unit 29 of this sensor in the on state even after it has been activated (reported). However, when the command for detecting the operation sensor of the command transmission unit is transmitted from the monitoring control device 11 and the command is recognized, the transistor of the operation signal output unit 29 is turned off (that is, the operation signal Information signal) is temporarily released). As a result, when the transistors of the other sensors are not turned on, the line voltage of the sensor line becomes the monitoring level (24V).

  Thereafter, the supervisory control device 11 sends a response return unit pulse to the sensor line. Here, as the response return unit, since the command type of the command transmission unit is the operation sensor search command, the sensor address response as described above is made. That is, the supervisory control device 11 sends out basic pulses one by one to the sensor line, and the sensor counts the number of basic pulses, and this count value (number of pulses) is set in the address section 23. Is stored in the storage unit when it is a sensor that has been activated (reported) and this sensor is activated (reported). In this sensor, the transistor of the operation signal output unit 29 is turned on by a predetermined pulse width and outputs the operation signal in a pulse. As a result, the line voltage of the sensor line becomes the operation level (5 V) by a predetermined pulse width, and the monitoring control device 11 can search for the activated (reported) sensor.

  The sensor turns on the transistor for a predetermined pulse width, outputs an operation signal, and then turns the transistor off again. As a result, the line voltage of the sensor line again becomes the monitoring level (24V).

  After that, when the response return unit is finished, the activated (reported) sensor turns on the transistor of the operation signal output unit 29 again and outputs an operation signal. As a result, the line voltage of the sensor line becomes the operating level (5 V) again.

  As described above, in the present invention, when the sensor that has been activated (reported) outputs the activation signal in a pulse until the response return unit is completed after the activation sensor search command of the command transmission unit is recognized. Except that the transistor of the operation signal output unit 29 is turned off (by temporarily canceling the operation signal), so that the current consumption when searching for the activated (reported) sensor is smaller than in the conventional case. can do.

  Further, according to the present invention, the activated (reported) sensor is not subjected to pulse output of an activation signal until the response return unit is completed after the activation sensor search command of the command transmission unit is recognized. Since the transistor of the operation signal output unit 29 is turned off (by temporarily canceling the operation signal), and only when the response is returned, the transistor is only turned on in a pulse form (the operation signal is output as a pulse). Even when there are a plurality of sensors activated (reported) on one sensor line, the monitoring control device 11 can search for a plurality of activation sensors.

  10 is a diagram showing FIG. 9 in more detail (more accurately). In the examples of FIGS. 9 and 10, for example, the sensors 12-1, 12-2, 12-3, 12-4, 12-5,. Assume that addresses “1”, “2”, “3”, “4”, “5”,. That is, the addresses “1”, “2”, “3” are assigned to the address sections 23 of the respective sensors 12-1, 12-2, 12-3, 12-4, 12-5,. , “4”, “5”,..., “N” are set in advance. For example, if the sensor 12-4 has issued (actuated), when the pulse signal is sequentially sent from the monitoring control device 11 to the response return unit, the sensor 12-4 receives the pulse signal. When the number is counted and this count number becomes “4” (when the fourth pulse signal is sent), this count value “4” is preset in its own address section 23. Since the address coincides with the address “4”, the case where the operation signal is pulsed at this time is shown.

  Thus, in the present invention, when the sensor detects an abnormality such as a fire, for example, the sensor sends an alarm signal (operation signal) to the monitoring control device 11 by the operation signal output unit 29. When the supervisory control device 11 receives the alert signal, it transmits an operation sensor search command to the sensor line to which the alert signal has been sent. Upon receiving the operation sensor search command, the alarming sensor (actuated) sensor temporarily cancels the output of the alarm signal (actuation signal). Then, the sensor address response is performed in a state where the output of the notification signal is cancelled. Sensors that are not operating do not respond. The supervisory control device 11 receives a response signal (search response signal) from the activated sensor, recognizes the address of the activated sensor, and displays it. Thereby, even when a plurality of sensors are activated, it is possible to determine which sensor is activated. The sensor that has been operated outputs an alarm signal (operation signal) again immediately after the response returning unit is completed.

  In the example of the monitoring control system described above, when the monitoring control device 11 receives a notification signal (operation signal) from a sensor connected to the sensor line, the monitoring control device 11 is a receiver. In this case, alarm processing is performed), and the alarm search signal is transmitted to the sensor line (alarm line) that has received the alarm signal. When the alarm signal (actuation signal) is received from the sensor connected to the sensor, the sensor line (alarm line) that has received the alarm signal is restored to the monitoring state, and the alarm line is received from the alarm line within a predetermined time. When an alarm signal (actuation signal) is received again, it is determined that an abnormality such as a fire has occurred in the alarm line, and alarm processing is performed when the monitoring control device 11 is a receiver. , Send an alert search signal to the alert line It may be made to the cormorants.

  The process in the monitoring control system of the present invention will be specifically described in detail.

  When a sensor detects an abnormality such as a fire, the sensor outputs an operation signal (alarm signal) (that is, the transistor of the operation signal output unit 29 is turned on, and the operation indicator lamp is lit). ). As a result, the line voltage is lowered to a predetermined voltage (operation level (5 V)) lower than the monitoring level (24 V).

  Further, at this time, the activated sensor stores information (report information) that it has reported (for example, fire report) in its storage unit 27.

  The supervisory control device 11 recovers after the sensor is activated (reported) and the line voltage is lowered to the operation level (5 V) as described above (that is, the line voltage is returned to the monitor level (24 V)). . Nevertheless, when it is detected that the line voltage is lowered to the operating level (5 V) (determining that the above sensor continues to operate (reporting)), it is determined as an abnormality such as a fire. That is, an abnormality such as a fire is determined (when the monitoring and control device 11 is a receiver, a sensor line (alarm line) that received the alarm signal is displayed and an alarm (for example, a fire alarm is performed). Then, the supervisory control device 11 performs an alarm search for an operation sensor search on the alarm line. The alarm search is performed by a transmission frame (alarm search pulse) including a command transmission unit and a response return unit. The type of command of the command transmission unit at this time is transmitted as a command for performing alarm search (operation sensor search command).

  When the sensor that has been actuated (reported) receives the command transmission part of the alert search pulse and recognizes the actuator sensor search command, the transistor of the actuating signal output part 29 is temporarily turned off (the actuating signal is temporarily switched off). To release automatically). As a result, the line voltage is raised to the monitoring level (24V).

  In addition, since the information on the fact that the sensor has issued (for example, a fire report) is stored in the storage unit 27 of the sensor that has been activated (reported), the CPU 24 of the sensor detects the operation of the command transmission unit. In response to the device search command, the response return unit starts counting pulses. When the number of pulses counted by the response return unit matches the self address, the transistor of the operation signal output unit 29 is turned on for a predetermined pulse width. The operation signal is output as a pulse.

  In the activated (reported) sensor, when the response returning unit is completed (when the activation sensor search pulse is completed), the notification signal is stored in its own storage unit, so that the transistor of the activation signal output unit 29 is turned on again. turn on. As a result, an operation signal is output (further, for example, the operation light of the operation sensor is lit), and the line voltage becomes the operation level (5 V).

  In addition, although the sensor that has not been activated receives the notification transmission pulse command transmission unit and recognizes the activation sensor search command, the storage unit 27 itself has issued a notification (for example, fire notification). This information is not stored, so the CPU 24 of the sensor recognizes the fire detector search command of the command transmission unit and counts the pulses of the response return unit in response to the fire sensor search command of the command transmission unit. Even when the response return unit's own address coincides with the counted number of pulses, the signal is not output (the transistor of the operation signal output unit 29 is not turned on and the operation signal is not pulsed).

  Note that the period during which the signal from the response return unit is being sent (the width of the entire response return unit) is set to be shorter than the time that the supervisory control device 11 detects by detecting that the line has been restored. The monitoring control device 11 identifies the alarm detector based on the signal (change) of the response return unit, and displays its identification information.

  In the above-described example, the storage unit 27 is provided separately from the RAM 26. In this case, a nonvolatile flash memory or the like can be used as the storage unit 27, but the storage unit 27 is not provided separately. The function of the storage unit 27 can also be given to the RAM 26. In other words, in the above description, the storage unit may be the RAM 26 or a non-volatile flash memory provided separately from the RAM 26.

  In the above-described example, the operation signal output unit 29 uses a transistor as shown in FIGS. 3 to 6, but the operation signal output unit 29 may be configured as a switching circuit. Not limited to the examples of FIGS. 3 to 6, any switching circuit can be used.

    In the above example, the alarm search is performed using the short-circuit level (0 V), the operation level (5 V), and the monitoring level (24 V). It is good also as a structure which a lamp | ramp (light emitting diode) maintains a lighting state.

  That is, for example, as shown in FIG. 13, as a switching circuit of the operation signal output unit 29, a transistor (Tr1) that is switched at the time of reporting and a search response, and a transistor (Tr2) that is switched at the time of reporting search other than the search response ), And the resistance value connected to Tr1 can be r1, while the resistance value connected to Tr2 can be r2 (= 10r1). In this case, when a fire is detected, the sensor turns on the Tr1 of the operation detection signal by the CPU 24 to lower the line voltage to 5 V, receives the alarm search signal from the monitoring control device, and searches for the operation sensor. When the command is recognized, Tr1 is turned off and Tr2 is turned on, the line voltage is set to a line voltage (for example, 20V) lower than the monitoring level (24V), the alarm search pulse is counted, and the same number as its own address. Is counted, Tr2 is turned off, Tr1 is turned on again, and a search response signal is output. Then, after the search response, Tr1 is turned off and Tr2 is turned on again. When the report search is finished, Tr2 is turned off and Tr1 is turned on.

  With this configuration, the operation indicator lamp (light emitting diode) of the sensor is lit relatively brightly when Tr1 is on, and when Tr2 is on (when an alarm search is performed). ) Is darker than when Tr1 is on, but it is possible to maintain the lighting state to such an extent that it can be visually recognized.

  Further, in the above description, the case where the command of the command transmission unit is an operation sensor search command has been described in detail. However, by transmitting a test command from the monitoring control device 11 as a command of the command transmission unit, A test can be performed. When the sensor receives the test command, it makes a function self-determination. As a result, the sensor can be tested by the monitoring control device 11.

  Further, by transmitting a connection confirmation command from the monitoring control device 11 as a command of the command transmission unit, the sensor connection confirmation (that is, disconnection detection) can be performed. More specifically, in order to perform sensor connection confirmation (that is, disconnection detection), the number of sensor connections is registered in advance in the monitor control device 11, and the monitor control device 11 transmits a connection confirmation command. When the sensor receives the connection confirmation command, it responds with a sensor address response. The supervisory control device 11 can confirm the disconnection by counting the number of sensors that have responded and comparing it with the number registered in advance. At this time, the sensor addresses need not be assigned sequentially from the first.

  The control processing in the sensor described in the above-described best mode for carrying out the present invention can be provided in the form of a program that is realized by a computer (for example, the CPU 24).

  A program for causing a computer (for example, the CPU 24) to perform control processing in the sensor described in the above-described best mode for carrying out the present invention includes a ROM 25, a hard disk, a floppy (registered trademark) disk, and a CD-ROM. , MO, DVD, etc., recorded on a computer-readable recording medium, and executed by being read from the recording medium by a computer (for example, CPU 24). Further, this program can be distributed via a network such as the Internet through the recording medium.

The present invention can be used for fire alarm systems, crime prevention systems, and the like.

It is a figure showing an example of composition of a supervisory control system concerning the present invention. It is a figure which shows the hardware structural example of the sensor which concerns on this invention. It is a figure which shows the structural example of an operation signal output part. It is a figure which shows the structural example of an operation signal output part. It is a figure which shows the structural example of an operation signal output part. It is a figure which shows the structural example of an operation signal output part. It is a figure which shows the transmission system made between the monitoring control apparatus and a sensor. It is a figure which shows an example of the format of a command transmission part. It is a figure for demonstrating the processing operation when a certain sensor act | operates (reporting) in the monitoring control system of this invention. FIG. 10 shows FIG. 9 in more detail (more accurately). It is a figure which shows the structural example of the conventional monitoring control system. It is a figure for demonstrating the processing operation of the monitoring control system of FIG. It is a figure which shows the structural example of an operation signal output part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Monitoring and control equipment 12 Sensor 13 Sensor line 21 Physical quantity detection part 22 A / D conversion part 23 Address part 24 CPU
25 ROM
26 RAM
27 Storage Unit 29 Actuation Signal Output Unit

Claims (13)

A sensor is connected to a sensor line extending from the monitoring and control device. When the monitoring and control device receives an alarm signal (operation signal) from the sensor connected to the sensor line, the alarm signal is output. In the supervisory control system for sending an alarm search signal to a received sensor line (alarm line), when the alarm signal is sent, the sensor has a predetermined current consumption larger than that in the monitor state. When the notification search signal is received from the monitoring and control device, the current consumption in the sensor is made smaller than the hold current at the time of sending the notification signal, and when responding to the notification search signal, A monitoring control system, wherein a search response signal is transmitted by returning the current consumption in the sensor to the holding current. 2. The supervisory control system according to claim 1, wherein the notification search signal includes a command transmission unit and a response return unit, and the sensor that has transmitted the notification signal receives the command transmission unit and then receives the sensor. The current consumption in the sensor is made smaller than the holding current at the time of sending the notification signal, and when responding to a predetermined pulse signal of the response return unit, the consumption current in the sensor is returned to the holding current and a search response signal is sent out. A supervisory control system characterized by that. A sensor is connected to a sensor line extending from the monitoring and control device. When the sensor connected to the sensor line detects an abnormality, an alarm signal (operation signal) is sent. When the alarm signal (actuation signal) is received from the sensor connected to the sensor line, the sensor line (alarm line) that received the alarm signal is restored to the monitoring state, and within a predetermined time, In the monitoring control system for determining that an abnormality has occurred in the alerting line when receiving the alerting signal (operation signal) from the alerting line again and transmitting the alert search signal to the alerting line, the sensing When the alarm signal is sent, the current consumption in the sensor is set to a predetermined holding current larger than that in the monitoring state, and when the alarm search signal is received from the monitoring control device, Holding power when sending alarm signal Smaller than, when responding to the alarm search signal, monitoring and control system, characterized in that it is the current consumption of the sensor so as to deliver a search response signal is returned to the holding current. In the monitoring control system according to claim 2, wherein the predetermined pulse signal of the response returning unit, that the short-circuit voltage B Ureberu (short level), and the high level (peak voltage) of the monitoring time voltage (monitoring level) Characteristic supervisory control system. 5. The monitoring control system according to claim 1, wherein the sensor includes a storage unit, and when the sensor issues a report (actuates), event information of the report is generated. Is stored in the storage unit. 6. The monitoring control system according to claim 1, wherein when the alarm is received and the alarm search is performed, the sensor generates an alarm event in the storage unit. 7. A monitoring control system characterized by determining whether or not to output a search response signal based on whether or not information is stored. The monitoring control system according to any one of claims 1 to 6, wherein the sensor stores the event information of the notification in the storage unit after the notification search is performed. Sometimes, based on this, the monitoring control system is characterized in that the current consumption in the sensor is returned to the holding current to restore the alerting line to the state at the time of sending the alerting signal. A sensor connected to a sensor line extending from the supervisory control device, and when the sensor sends an alarm signal, the current consumption in the sensor is set to a predetermined holding current larger than that in the monitoring state. In addition, when the alarm search signal is received from the monitoring control device, the current consumption in the sensor is made smaller than the holding current at the time of sending the alarm signal, and in response to the alarm search signal, the current in the sensor A sensor for returning a consumption current to the holding current and transmitting a search response signal. 9. The sensor according to claim 8, wherein the sensor has a storage unit, and when the alarm is issued (actuated), event information of the alarm is stored in the memory unit. 10. The sensor according to claim 8 or 9, wherein, when the sensor receives the report search signal and performs the report search, the event information of the report is stored in the storage unit. A sensor for determining whether or not to output a search response signal. The sensor according to any one of claims 8 to 10, wherein after the alert search is performed, the sensor stores event information of the alert in the storage unit. Based on this, the current consumption in the sensor is returned to the holding current, and the alarm line is restored to the state when the alarm signal is transmitted. A program for causing a computer to execute control processing of a sensor connected to a sensor line extending from a monitoring control device, and when sending an alarm signal, the current consumption in the sensor is less than in the monitoring state. When a large predetermined holding current is set and an alarm search signal is received from the monitoring and control device, the current consumption in the sensor is made smaller than the holding current when the alarm signal is transmitted, and the alarm search signal is responded. Sometimes, a program for causing a computer to realize control processing of a sensor that returns a consumption current in the sensor to the holding current and sends a search response signal. A computer-readable recording medium recording a program for causing a computer to execute control processing of a sensor connected to a sensor line extending from a monitoring control device, and when a notification signal is transmitted, the sensor The current consumption in the sensor is set to a predetermined holding current larger than that in the monitoring state, and when the alarm search signal is received from the monitoring control device, the current consumption in the sensor is set to be greater than the current holding at the time of sending the alarm signal. When responding to an alarm search signal, the computer reads a program that records a program for causing the computer to execute control processing of the sensor that returns the current consumption in the sensor to the holding current and sends the search response signal. Possible recording media.

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