JP2010271827A - State information transmission device and monitoring system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a state information transmission device and a monitoring system which can monitor the state of a monitoring object, in more detail. <P>SOLUTION: The state information transmission device includes a plurality of detection parts which output a plurality of state detection signals which indicate each of the plurality of states of monitoring objects with a first or a second level; and a timing control part which outputs a state information signal, wherein at least one of the plurality of the state detection signals goes into a third level by the first timing among detection timings to become the first level, and goes into a fourth level, only for the second time, set beforehand, for each state detection signal which has gone to the first level, after a lapse of the first time from the detection timing. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a status information transmission device and a monitoring system.

  In order to ensure the reliability of the power system, it is important to properly monitor facilities such as power plants, substations, transmission lines, and distribution lines. In addition, since power plants and substations are often located in places where traffic is inconvenient, many devices installed in those facilities are generally remotely monitored at monitoring facilities.

  When a device to be monitored (hereinafter referred to as a device to be monitored) does not perform a predetermined operation due to a failure or the like, the abnormal operation is notified, for example, by turning on an indicator lamp. For example, in Patent Document 1, an abnormality detection unit (monitor circuit) outputs a signal indicating an operation state in accordance with a current flowing on the input side (primary side) of a photocoupler, and an abnormality occurs when the operation is abnormal based on the signal. A control terminal in which an indicator lamp (light emitting diode) is lit is disclosed.

  Here, FIG. 10 shows an example of a configuration of a general monitoring system that notifies an abnormal operation of the monitoring target device using the same method as the abnormality indicator lamp of Patent Document 1.

  In the general monitoring system shown in FIG. 10, the status of the monitoring target devices 1, 2, and 3 installed in the equipment installation facility such as a power plant or a substation is determined by sensors S11, S21, and S31, respectively. Detected. In FIG. 10, for example, the sensor S21 detects an operation abnormality of the monitoring target device 2 and turns on the switch circuit W21 by the state detection signal L21. When the switch circuit W21 is turned on, a current flows to the input side (light emitting diode) of the resistor R27 and the photocoupler P27, and further, a current flows to the output side (phototransistor) of the photocoupler P27 and the resistor R28. Then, the high-level state information signal ER2 is transmitted, and the monitoring device 9 installed in the monitoring facility lights the indicator lamp of the display unit 91 corresponding to the monitoring target device 2 and the level of the state information signal ER2 The change is recorded in the recording unit 92.

  In this way, the status information of the monitoring target device installed in the device installation facility can be transmitted to the monitoring device installed in the monitoring facility.

JP 11-285172 A

  In the general monitoring system as shown in FIG. 10, when a sensor is added for the purpose of detecting a plurality of types of operation abnormality of the monitored device, a switch circuit, a photocoupler, etc. according to the number of sensors. Need to be added and wired in the same way. In addition, since the number of signal lines between the equipment installation facility and the monitoring facility increases, it is necessary to change the monitoring device on the monitoring facility side.

  On the other hand, for example, as shown in FIG. 11, a change in the entire monitoring system can be minimized by connecting a switch circuit controlled by the added sensor in parallel with the existing switch circuit. In FIG. 11, for example, sensors S12 and S13 are added to the monitoring target device 1, and the switch circuits W12 and W13 controlled by them are connected in parallel with the existing switch circuit W11. The monitoring target devices 2 and 3 are also connected in the same manner. In this case, the monitoring facility does not need to be changed, and the same monitoring device 9 as in the monitoring system shown in FIG. 10 can be used.

  However, in the monitoring system shown in FIG. 11, although it is possible to detect a plurality of types of operation abnormality of the monitoring target device by the added sensor, it is determined by which sensor the operation abnormality is detected. Can not do it. In FIG. 11, for example, the sensor S22 detects an abnormal operation of the monitored device 2 and turns on the switch circuit W22. In this case, the state information signal ER2 transmitted to the monitoring device 9 is the sensor S21 or S23. Is the same as when an abnormal operation is detected.

  Therefore, in the equipment installation facility, although the status information of the monitoring target device can be acquired in detail, the monitoring facility can use only the status information aggregated for each monitoring target device.

  The main present invention that solves the above-described problems includes a plurality of detection units that output a plurality of state detection signals each indicating a plurality of states to be monitored at a first or second level, and at least one of the plurality of state detection signals. One of the detection timings at which the first level becomes the first level becomes the third level at the first timing, and is set in advance for each state detection signal that has reached the first level after a lapse of the first time from the detection timing. And a timing control unit that outputs a state information signal that is at a fourth level for the second time period.

  Other features of the present invention will become apparent from the accompanying drawings and the description of this specification.

  According to the present invention, it is possible to monitor the state of the monitoring target in more detail.

It is a block diagram which shows the outline of a structure of the state information transmitter in 1st thru | or 3rd Embodiment of this invention. It is a circuit block diagram which shows the structure of the state information transmitter in 1st Embodiment of this invention. In 1st thru | or 3rd embodiment of this invention, it is a figure explaining operation | movement of the status information transmitter when sensor S11 detects the operation abnormality of the monitoring object apparatus 1. FIG. In 1st thru | or 3rd embodiment of this invention, it is a figure explaining operation | movement of the state information transmission apparatus when sensor S12 detects the operation abnormality of the monitoring object apparatus 1. FIG. In 1st thru | or 3rd embodiment of this invention, it is a figure explaining operation | movement of the state information transmission apparatus when sensor S13 detects the operation abnormality of the monitoring object apparatus 1. FIG. In 1st thru | or 3rd embodiment of this invention, it is a figure explaining operation | movement of the state information transmission apparatus when sensor S11 and S13 detect the operation abnormality of the monitoring object apparatus 1 simultaneously. In 1st thru | or 3rd Embodiment of this invention, it is a figure explaining operation | movement of the state information transmission apparatus when the sensor S11 and S12 detect the operation abnormality of the monitoring object apparatus 1 at a different timing. It is a circuit block diagram which shows the structure of the state information transmission apparatus in 2nd Embodiment of this invention. It is a block diagram which shows the structure of the state information transmitter in 3rd Embodiment of this invention. It is a circuit block diagram which shows an example of a structure of a general monitoring system. It is a circuit block diagram which shows the structure of the monitoring system which added the sensor, suppressing a change to the minimum.

  At least the following matters will become apparent from the description of this specification and the accompanying drawings.

=== Outline of Configuration and Operation of Status Information Transmitting Device ===
Hereinafter, with reference to FIG. 1, an outline of a configuration of a state information transmitting apparatus in first to third embodiments of the present invention to be described later will be described.
The state information transmission device shown in FIG. 1 is a device for transmitting state information of the monitoring target device 1 and includes detection units 11 to 13 and a timing control unit 17. In addition, the status information transmission device constitutes a monitoring system by being used together with the monitoring device 9 shown in FIG. 10, for example. Note that the number of devices to be monitored and the number of detection units for each device to be monitored can be changed as appropriate. In FIG. 1, as an example, a state information transmission apparatus having three detection units 11 to 13 for one monitoring target device 1 is illustrated.
The detection units 11 to 13 are arranged around or inside the monitoring target device 1. Further, the state detection signals L11 to L13 output from the detection units 11 to 13 are all input to the timing control unit 17. The timing control unit 17 outputs a state information signal ER1.

Next, an outline of the operation of the state information transmitting apparatus in each embodiment will be described.
The detection units 11 to 13 detect the state of the monitoring target device 1, respectively, and output state detection signals L11 to L13 indicating the detected state by two levels. Further, the timing control unit 17 outputs a state information signal ER1 whose level changes at a timing according to the change in the level of the state detection signals L11 to L13. A detailed description of the relationship between the level change of the state detection signals L11 to L13 and the level change of the state information signal ER1 will be given later.
In this way, the state information transmitting device generates and outputs the state information signal ER1 whose timing is controlled according to the state detection signals L11 to L13 indicating the state of the monitored device 1, respectively.

<First Embodiment>
=== Configuration of Status Information Transmitting Device ===
Hereinafter, with reference to FIG. 2, the configuration of the state information transmitting apparatus according to the first embodiment of the present invention will be described.
2 includes sensors S11 to S13, switch circuits W11 to W13, timers T14 to T16, an AND circuit (logical product circuit) A17, a switch circuit W17, a photocoupler P17, and a resistor R17. R18 is included. In the state information transmitting apparatus, the sensors S11 to S13 are included in the detection units 11 to 13 in FIG. 1, respectively, and switch circuits W11 to W13, timers T14 to T16, AND circuit A17, switch circuit W17, and photocoupler P17. , And resistors R17 and R18 are included in the timing control unit 17 in FIG.

The sensors S11 to S13 are installed, for example, inside the monitoring target device 1. Further, state detection signals L11 to L13 are output from the sensors S11 to S13, respectively.
One end of each of the switch circuits W11 to W13 (first switch circuit) is connected to a positive potential VH (first potential), and the other end is commonly connected to, for example, a control panel (not shown). Hereinafter, the common connection point is referred to as a node A. Further, the state detection signals L11 to L13 are control signals for ON / OFF control of the switch circuits W11 to W13, respectively. Further, the state detection signals L11 to L13 are also input to timers T14 to T16, respectively. The timing signals L14 to L16 output from the timers T14 to T16, respectively, are all input to the AND circuit A17.

One end of the switch circuit W17 (second switch circuit) is connected to the node A. The output signal L17 of the AND circuit A17 is a control signal for turning on / off the switch circuit W17.
The photocoupler P17 and the resistors R17 and R18 constitute a relay circuit. The input side of the photocoupler P17 is, for example, a light emitting diode, the anode is connected to the other end of the switch circuit W17 via the resistor R17, and the cathode is connected to the ground potential (second potential). The output side of the photocoupler P17 is, for example, a phototransistor, the collector is connected to the power supply potential VCC, and the emitter is connected to the ground potential via the resistor R18. A connection point between the photocoupler P17 and the resistor R18 is an output node of the state information transmission device, and the state information signal ER1 is output from the output node.

=== Operation of Status Information Transmitting Device ===
Next, the operation of the state information transmitting apparatus in this embodiment will be described. In the present embodiment, each switch circuit is turned on when the control signal is at a high level, and is turned off when the control signal is at a low level.

  Each of the sensors S11 to S13 detects an abnormal operation in which the operation of the monitored device 1 at the installation location is not a predetermined operation, and outputs state detection signals L11 to L13 indicating the detection results. In the present embodiment, each state detection signal is at a high level (first level) when an operation abnormality is detected, and is at a low level (second level) at the time of non-detection (normal time). .

  As described above, the switch circuits W11 to W13 are connected in parallel between the potential VH and the node A, and are on / off controlled by the state detection signals L11 to L13, respectively. Accordingly, when at least one of the sensors S11 to S13 detects an operation abnormality of the monitored device 1, at least one of the switch circuits W11 to W13 is turned on, and the potential of the node A becomes substantially equal to the potential VH.

  The timers T14 to T16 measure the elapsed time from the timing when the state detection signals L11 to L13 become high level (hereinafter referred to as detection timing), respectively. The timers T14 to T16 are preset with first times m1 to m3 and second times s1 to s3, respectively, and are low for a second time after the lapse of the first time from the detection timing. • Output timing signals L14 to L16 that are level. For example, when the detection timing is t = 0, the timer T14 outputs a timing signal L14 that is at a low level only during m1 ≦ t ≦ m1 + s1. The AND circuit A17 outputs a logical product of the timing signals L14 to L16.

  As described above, the switch circuit W17 is on / off controlled by the output signal L17 of the AND circuit A17. Therefore, the switch circuit W17 is turned off only when at least one of the elapsed times of the timers T14 to T16 is not less than the first time and not more than the sum of the first and second times, and the elapsed times of the timers T14 to T16 are both ON for less than the first time or exceeding the sum of the first and second times.

  On the input side of the relay circuit including the photocoupler P17, a current flows when at least one of the switch circuits W11 to W13 is turned on and the switch circuit W17 is turned on. Further, according to the input side current, a current also flows to the output side of the relay circuit, and the state information signal ER1 becomes a high level (third level). On the other hand, when the switch circuits W11 to W13 are all off, or when the switch circuit W17 is off, the state information signal ER1 is at a low level (fourth level). Note that the input side and the output side of the relay circuit are electrically insulated by using the photocoupler P17.

  The state information signal ER1 is output from the output node of the state information transmitting apparatus by the operation of each unit described above. Hereinafter, a specific example of the operation of the state information transmitting apparatus when at least one of the sensors S11 to S13 detects an operation abnormality of the monitoring target device 1 will be described with reference to FIG. 2 and FIGS.

  FIG. 3 shows state detection signals L11 to L13, timing signals L14 to L16, and a state information signal ER1 that are output when the sensor S11 detects an abnormal operation at the time t = 0. At the time of non-detection during t <0, each state detection signal is at a low level, each timing signal is at a high level, and the state information signal ER1 is at a low level.

  When the sensor S11 detects an operation abnormality at the time point t = 0, the state detection signal L11 becomes high level, and the switch circuit W11 is turned on. The timer T14 starts counting elapsed time from the time point t = 0 and holds the timing signal L14 at the high level until the time point t = m1. Therefore, the output signal L17 of the AND circuit A17 is held at a high level, and the switch circuit W17 is fixed while being on. Therefore, the state information signal ER1 is at a high level while 0 ≦ t <m1.

  Further, at time t = m1, the timing signal L14 and the output signal L17 of the AND circuit A17 are at a low level, and the switch circuit W17 is turned off for the time s1, so that the state information signal ER1 is low for m1 ≦ t ≦ m1 + s1.・ Become a level. At time t = m1 + s1, the timing signal L14 and the output signal L17 of the AND circuit A17 again become high level, and the switch circuit W17 is turned on, so that the state information signal ER1 becomes high level again thereafter.

  FIG. 4 shows state detection signals L11 to L13, timing signals L14 to L16, and a state information signal ER1 that are output when the sensor S12 detects an operation abnormality at the time t = 0. As in the case of FIG. 3, the state information signal ER <b> 1 is at a low level when not detected during t <0. Further, when the sensor S12 detects an operation abnormality at the time t = 0, the state information signal ER1 becomes a high level, and thereafter becomes a low level only during m2 ≦ t ≦ m2 + s2.

  FIG. 5 shows state detection signals L11 to L13, timing signals L14 to L16, and a state information signal ER1 that are output when the sensor S13 detects an operation abnormality at the time t = 0. As in the case of FIG. 3 and FIG. 4, the state information signal ER1 is at a low level when not detected during t <0. Further, when the sensor S13 detects an operation abnormality at the time t = 0, the state information signal ER1 becomes a high level, and thereafter becomes a low level only during m3 ≦ t ≦ m3 + s3.

  In this manner, when any one of the sensors S11 to S13 detects an abnormal operation of the monitoring target device 1, the state information signal ER1 is detected at the detection timing (t = 0 in FIGS. 3 to 5). At a time point), and becomes low level for a second time after the first time has elapsed from the detection timing. Therefore, when the second time is set for each timer to which the state detection signal is input from the sensor, the time during which the state information signal ER1 is at the low level can be set to be different depending on the sensor that has detected the operation abnormality.

  Further, for example, when the monitoring device 9 shown in FIG. 10 receives such a state information signal ER1, it is possible to determine the sensor that has detected the operation abnormality from the temporary turn-off time of the indicator lamp of the display unit 91 that is turned on. it can. As an example, if s1 = 1 second, s2 = 2 seconds, and s3 = 3 seconds are set, the sensor S11 is only turned on for 2 seconds when the indicator light corresponding to the monitored device 1 is turned off for 1 second. When the light is turned off, the sensor S12 is turned off for only 3 seconds. When the light is turned off, it can be determined that the sensor S13 is a sensor that has detected an abnormal operation. Furthermore, by recording the change in the level of the state information signal ER1 in the recording unit 92, it is possible to determine the sensor that has detected the abnormal operation afterwards.

  FIG. 6 shows the state detection signals L11 to L13, the timing signals L14 to L16, and the state information signal ER1 that are output when the sensors S11 and S13 simultaneously detect abnormal operation at the time t = 0. In this case, the state detection signal L11 and the timing signal L14 similar to those in FIG. 3 are output from the sensor S11 and the timer T14, respectively, and the state detection signals similar to those in FIG. 5 are output from the sensor S13 and the timer T16, respectively. L13 and timing signal L16 are output. As in the case of FIGS. 3 and 5, the state detection signal L12 is always at a low level, and the timing signal L15 is always at a high level.

  On the other hand, the output signal L17 of the AND circuit A17 is at a low level while at least one of the timing signals L14 to L16 is at a low level. Accordingly, if the sensors S11 and S13 detect an abnormal operation at the same time when t = 0, the state information signal ER1 becomes high level, and then low level only during m1 ≦ t ≦ m1 + s1 and m3 ≦ t ≦ m3 + s3. It becomes.

  In this way, when a plurality of the sensors S11 to S13 simultaneously detect abnormal operation of the monitored device 1, the state information signal ER1 is high at the detection timing (at time t = 0 in FIG. 6). The level becomes low level only for the second time after the elapse of the first time from the detection timing. Therefore, by setting the first time for each timer to which the state detection signal is input from the sensor, it is possible to prevent the periods in which the state information signal ER1 is at the low level from overlapping. Note that, in order to reliably prevent the period in which the state information signal ER1 is at the low level from overlapping, the minimum time in the first time is set to be greater than the maximum time in the second time. It is desirable.

  For example, when the monitoring device 9 shown in FIG. 10 receives such a state information signal ER1, the indicator lamp of the display unit 91 is turned off for a second time after the first time has elapsed since the start of lighting. It will be. For example, in the case of FIG. 6, setting s1 = 1 second, s2 = 2 seconds, s3 = 3 seconds, m1 = 1 minute, m2 = 2 minutes, and m3 = 3 minutes corresponds to the monitoring target device 1. The indicator lamp is turned off for 1 second after 1 minute from the start of lighting and for 3 seconds after 3 minutes.

  FIG. 7 shows state detection signals L11 to L13, timing signals L14 to L16, and state information signal ER1 that are output when the sensors S11 and S12 detect abnormal operation at the time points t = 0 and t = t1, respectively. Show. In this case, the sensor S11 and the timer T14 output the same state detection signal L11 and timing signal L14 as in the case of FIG. The sensor S12 and the timer T15 output a state detection signal L12 and a timing signal L15 that are shifted by a time t1 as compared with the case of FIG. Further, as in FIGS. 3 and 4, the state detection signal L13 is always at a low level, and the timing signal L16 is always at a high level.

  On the other hand, the output signal L17 of the AND circuit A17 is at a low level while at least one of the timing signals L14 to L16 is at a low level. Therefore, when the sensor S11 first detects an abnormal operation at the time t = 0, the state information signal ER1 becomes a high level, and then becomes a low level only during m1 ≦ t ≦ m1 + s1 and during t1 + m2 ≦ t ≦ t1 + m2 + s2. Become.

  In this way, when an operation abnormality of the monitoring target device 1 is detected at a timing when a plurality of the sensors S11 to S13 are different, the state information signal ER1 is the first detection timing (t = 0 in FIG. 7). At a time point) and becomes a low level for a second time after the first time has elapsed from each detection timing (at time points t = 0 and t = t1 in FIG. 7).

  For example, when the monitoring device 9 illustrated in FIG. 10 receives such a state information signal ER1, the indicator lamp of the display unit 91 is set to the second after a lapse of the first time from each detection timing including the lighting start time. It will be turned off only for the time. As an example, in the case of FIG. 7, when the first and second times are set as in the case of FIG. 6 and t1 = 5 minutes, the indicator lamp corresponding to the monitoring target device 1 is 1 from the start of lighting. The light turns off for 1 second after the lapse of minutes and 2 seconds after the lapse of 7 minutes. Further, each detection is performed by subtracting the first time corresponding to the second time (light-off time) from the start of light-off based on the change in the level of the state information signal ER1 recorded in the recording unit 92. Timing can also be determined.

  In this way, the monitoring system including the state information transmitting device of this embodiment and the monitoring device 9 can monitor the state of the monitoring target device 1 in more detail.

<Second Embodiment>
=== Configuration of Status Information Transmitting Device ===
Hereinafter, with reference to FIG. 8, the structure of the state information transmission apparatus in the 2nd Embodiment of this invention is demonstrated.

  The state information transmitting apparatus shown in FIG. 8 includes sensors S11 to S13, switch circuits W11 to W16, timers T14 to T16, a photocoupler P17, and resistors R17 and R18. In the state information transmitting apparatus, the sensors S11 to S13 are included in the detection units 11 to 13 in FIG. 1, respectively. The switch circuits W11 to W16, timers T14 to T16, photocoupler P17, and resistors R17, R18 are: It is included in the timing control unit 17 in FIG.

  The sensors S11 to S13 are installed, for example, inside the monitoring target device 1. Further, state detection signals L11 to L13 are output from the sensors S11 to S13, respectively.

  One end of each of the switch circuits W11 to W13 (first switch circuit) is connected to the positive potential VH (first potential). Further, the state detection signals L11 to L13 are control signals for ON / OFF control of the switch circuits W11 to W13, respectively. Further, the state detection signals L11 to L13 are also input to timers T14 to T16, respectively. The timing signals L17 are output from the timers T14 to T16.

  One end of each of the switch circuits W14 to W16 (second switch circuit) is connected to the other end of each of the switch circuits W11 to W13, and the other end is commonly connected to, for example, a control panel (not shown). Hereinafter, the common connection point is referred to as a node B. The timing signal L17 is a control signal for on / off control of the switch circuits W14 to W16.

  Similar to the state information transmitting apparatus of the first embodiment, the photocoupler P17 and the resistors R17 and R18 constitute a relay circuit. The input side of the photocoupler P17 is, for example, a light emitting diode, the anode is connected to the node B via the resistor R17, and the cathode is connected to the ground potential (second potential). The output side of the photocoupler P17 is, for example, a phototransistor, the collector is connected to the power supply potential VCC, and the emitter is connected to the ground potential via the resistor R18. A connection point between the photocoupler P17 and the resistor R18 is an output node of the state information transmission device, and the state information signal ER1 is output from the output node.

  In the state information transmitting apparatus of the first embodiment, the node A, the second switch circuit, and the relay circuit are connected in this order. Therefore, when a control panel (not shown) including the node A is not arranged close to the monitoring target device 1, the wiring from each sensor to the second switch circuit via each timer becomes long. .

  On the other hand, in the state information transmitting apparatus of the present embodiment, the second switch circuit, the node B, and the relay circuit are connected in this order. Therefore, even when the control panel (not shown) including the node B is not arranged close to the monitoring target device 1, the second switch circuit can be arranged close to the monitoring target device 1. Wiring can be shortened.

=== Operation of Status Information Transmitting Device ===
Next, the operation of the state information transmitting apparatus in this embodiment will be described. In the present embodiment, each switch circuit is turned on when the control signal is at a high level, and is turned off when the control signal is at a low level.

  The sensors S11 to S13 each detect an abnormal operation of the monitored device 1 at the installation location, and output state detection signals L11 to L13 indicating the detection results. In the present embodiment, each state detection signal is at a high level (first level) when an operation abnormality is detected, and is at a low level (second level) when no operation is detected.

  The timers T14 to T16 measure the elapsed time from the detection timing when the state detection signals L11 to L13 are at the high level, respectively. The timers T14 to T16 are preset with first times m1 to m3 and second times s1 to s3, respectively, and are low for a second time after the lapse of the first time from the detection timing. Generate timing signals L14 to L16 that are level. Further, the timers T14 to T16 mutually input and output timing signals L14 to L16, and output a timing signal L17 that is at a low level while at least one of the timing signals L14 to L16 is at a low level. Therefore, the timing signal L17 is a logical product of the timing signals L14 to L16, and has the same waveform as the output signal L17 of the AND circuit A17 in the first embodiment.

  As described above, the switch circuits W11 to W13 are on / off controlled by the state detection signals L11 to L13, respectively, and the switch circuits W14 to W16 are all on / off controlled by the timing signal L17. The series circuit of switch circuits W11 and W14, the series circuit of switch circuits W12 and W15, and the series circuit of switch circuits W13 and W16 are connected in parallel between potential VH and node B. Therefore, when at least one of the state detection signals L11 to L13 is at a high level and the timing signal L17 is at a high level, at least one of the switch circuits W11 to W13 and the switch circuits W14 to W16 are turned on. The potential of the node B is substantially equal to the potential VH.

  On the input side of the relay circuit including the photocoupler P17, current flows when at least one of the switch circuits W11 to W13 is turned on and the switch circuits W14 to W16 are turned on. Further, according to the input side current, a current also flows to the output side of the relay circuit, and the state information signal ER1 becomes a high level (third level). On the other hand, when the switch circuits W11 to W13 are all off, or when the switch circuits W14 to W16 are off, the state information signal ER1 is at a low level (fourth level). Become.

  By the operation of each unit described above, the state information transmitting apparatus of the present embodiment outputs the same state information signal ER1 as in the case of the first embodiment.

<Third Embodiment>
=== Configuration of Status Information Transmitting Device ===
Hereinafter, with reference to FIG. 9, the configuration of the state information transmitting apparatus according to the third embodiment of the present invention will be described.

  FIG. 9 shows an example of the state information transmitting apparatus in which the timing control unit 17 is configured by a logic circuit in the state information transmitting apparatus shown in FIG.

  The detection units 11 to 13 are arranged around or inside the monitoring target device 1. Further, the state detection signals L11 to L13 output from the detection units 11 to 13 are all input to the timing control unit 17.

  The timing control unit 17 includes, for example, timers T14 to T16, AND circuits A17 and 18, and an OR circuit (OR circuit) O17. The state detection signals L11 to L13 are input to the timers T14 to T16, respectively, and the timing signals L14 to L16 output from the timers T14 to T16 are input to the AND circuit A17. The state detection signals L11 to L13 are all input to the OR circuit O17. The AND circuit A18 receives the output signal L17 of the AND circuit A17 and the output signal of the OR circuit O17, and the state information signal ER1 output from the AND circuit A18 is output from the timing control unit 17. Yes.

=== Operation of Status Information Transmitting Device ===
Next, the operation of the state information transmitting apparatus in this embodiment will be described.
The detection units 11 to 13 detect, for example, an abnormal operation of the monitoring target device 1 using a sensor (not shown), and output state detection signals L11 to L13 indicating the detection result. As in the first and second embodiments, each state detection signal is at a high level (first level) when an abnormal operation is detected, and is at a low level (second level) when no operation is detected. Shall.

  The timers T14 to T16 of the timing control unit 17 measure the elapsed time from the detection timing when the state detection signals L11 to L13 are at the high level, respectively. The timers T14 to T16 are preset with first times m1 to m3 and second times s1 to s3, respectively, and are low for a second time after the lapse of the first time from the detection timing. • Output timing signals L14 to L16 that are level. Further, the AND circuit A17 outputs a logical product of the timing signals L14 to L16. Therefore, the output signal L17 of the AND circuit A17 in the present embodiment has the same waveform as the output signal L17 of the AND circuit A17 in the first embodiment.

  On the other hand, the OR circuit O17 outputs a logical sum of the state detection signals L11 to L13. Further, the AND circuit A18 outputs a logical product of the output signal L17 of the AND circuit A17 and the output signal of the OR circuit O17 as the state information signal ER1. Therefore, when at least one of the state detection signals L11 to L13 is at a high level and all the timing signals L14 to L16 are at a high level, the state information signal ER1 is at a high level (third level). It becomes. On the other hand, when the state detection signals L11 to L13 are all at a low level, or when at least one of the timing signals L14 to L16 is at a low level, the state information signal ER1 is low. Level (fourth level).

  By the operation of each unit described above, the state information transmitting apparatus of the present embodiment outputs the same state information signal ER1 as in the first and second embodiments.

  As described above, in the status information transmitting apparatus shown in FIGS. 1, 2, 8, and 9, the high level is detected at the first timing among the detection timings when at least one of the status detection signals L11 to L13 becomes high level. By outputting a state information signal ER1 that becomes a low level for a preset second time for each state detection signal that has become a level and has passed a first time after each detection timing. The state of the monitoring target device 1 can be monitored in more detail.

  Further, by setting in advance for each state detection signal that has become high level also for the first time, it is possible to prevent the periods in which the state information signal ER1 is at low level from overlapping.

  Each of the timers T14 to T16 counts the elapsed time from the detection timing, so that at least one of the timers T14 to T16 starts counting the elapsed time, and the elapsed times of the timers T14 to T16 are all the first. When the time is less than one time or when the sum of the first and second times is exceeded, the state information signal ER1 that becomes a high level can be output.

  In the state information transmitting apparatus shown in FIG. 2, when the state detection signals L11 to L13 are at a high level, the switch circuits W11 to W13 are turned on, respectively, and at least one of the elapsed times of the timers T14 to T16 is the first. The state information signal ER1 can be output from the output side of the relay circuit by turning off the switch circuit W17 when the time is not less than the time and not more than the sum of the first and second times.

  Further, in the state information transmitting apparatus shown in FIG. 8, when the state detection signals L11 to L13 are at the high level, the switch circuits W11 to W13 are turned on, respectively, and at least one of the elapsed times of the timers T14 to T16 is the first. The state information signal ER1 can be output from the output side of the relay circuit by turning off the switch circuits W14 to W16 when the time is equal to or longer than the sum of the first and second times.

  Further, since the relay circuit includes the photocoupler P17, the input side and the output side of the relay circuit can be electrically insulated.

  Also, as shown in FIG. 9, timing signals L14 to L16 are all input to AND circuit A17, state detection signals L11 to L13 are all input to OR circuit O17, and output signal L17 of AND circuit A17 is ORed. By inputting the output signal of the circuit O17 to the AND circuit A18, the state information signal ER1 can be output from the AND circuit A18.

  In addition, the detection units 11 to 13 include sensors S11 to S13 that output state detection signals L11 to L13 that are high when an operation abnormality is detected, thereby detecting a plurality of types of operation abnormalities in the monitored device 1. Can do.

  Further, in the monitoring system including the state information transmitting device shown in FIG. 1, FIG. 2, FIG. 8, or FIG. 9 and the monitoring device 9 shown in FIG. 10, a display unit is displayed according to the level of the state information signal ER1. By turning on or off the 91 indicator lamp, it is possible to determine the sensor that has detected the operation abnormality from the temporary turn-off time during lighting.

  Further, by recording the change in the level of the state information signal ER1 in the recording unit 92, it is possible to determine the sensor that has detected the operation abnormality afterwards and obtain each detection timing.

  In addition, the said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes equivalents thereof.

  In the first and second embodiments, the first and third levels are high level, the second and fourth levels are low level, and the first potential (positive potential VH) is the first level. Although it is higher than the potential of 2 (ground potential), it is not limited to this. The polarity of each state detection signal, each timing signal, and state information signal ER1, and the polarity of the control signal of each switch circuit are appropriately inverted, and depending on these polarities, the positive and negative of the first and second potentials and the relay circuit The polarity can also be changed as appropriate. In the third embodiment, the OR circuit O17, the AND circuit A17, and the AND circuit A18 are appropriately changed to other logic circuits according to the polarity of each state detection signal, each timing signal, and the state information signal ER1. Can be done.

1, 2, 3 Device to be monitored 9 Receiving device 11, 12, 13 Detection unit 17 Timing control unit 91 Display unit 92 Recording unit S11, S12, S13 Sensor W11, W12, W13 Switch circuit T14, T15, T16 Timer W14, W15 , W16, W17 Switch circuit A17, A18 AND circuit (logical product circuit)
O17 OR circuit (logical sum circuit)
P17 Photocoupler R17, R18 Resistor S21, S22, S23 Sensor W21, W22, W23 Switch circuit P27 Photocoupler R27, R28 Resistor S31, S32, S33 Sensor W31, W32, W33 Switch circuit P37 Photocoupler R37, R38 Resistor

Claims (10)

A plurality of detection units for outputting a plurality of state detection signals respectively indicating a plurality of states to be monitored at first or second levels;
Of the detection timings at which at least one of the plurality of state detection signals becomes the first level, the first level becomes the third level, and after the first time elapses from the detection timing, the first level is reached. A timing control unit that outputs a state information signal that becomes a fourth level for a second time set in advance for each state detection signal;
A state information transmitting device comprising:   The state information transmitting apparatus according to claim 1, wherein the first time is set in advance for each state detection signal that has reached the first level. The timing control unit includes a plurality of timers for measuring elapsed time from the detection timing at which the plurality of state detection signals are each at the first level,
In the status information signal, at least one of the plurality of timers starts counting the elapsed time, and the elapsed times of the plurality of timers are all less than the first time or the first and second The state information transmitting apparatus according to claim 1 or 2, wherein the third level is reached when a sum of time is exceeded. The timing controller is
A plurality of first switch circuits each having one end connected to the first potential and the other end connected in common, and each of the plurality of state detection signals being turned on when the first level;
One end is connected to a connection point of the other ends of the plurality of first switch circuits, and at least one of the elapsed times of the plurality of timers is not less than the first time and not more than the sum of the first and second times. A second switch circuit which is turned off in the case of
A relay circuit having an input side connected between the other end of the second switch circuit and a second potential, and outputting the state information signal from the output side according to a current flowing through the input side;
The status information transmitting apparatus according to claim 3, further comprising: The timing controller is
A plurality of first switch circuits each having one end connected to a first potential and turned on when each of the plurality of state detection signals is at the first level;
One end is connected to the other end of each of the plurality of first switch circuits, the other end is connected in common, and at least one of the elapsed times of the plurality of timers is greater than or equal to the first time and the first and second A plurality of second switch circuits that are all turned off when less than or equal to the sum of two times;
A relay circuit having an input side connected between a connection point of the other end of the plurality of second switch circuits and a second potential, and outputting the state information signal from the output side according to a current flowing to the input side;
The status information transmitting apparatus according to claim 3, further comprising:   6. The state information transmitting apparatus according to claim 4, wherein the relay circuit is electrically insulated from an input side and an output side by a photocoupler. Each of the plurality of state detection signals is a binary signal in which the first level is a high level,
The plurality of timers each output a plurality of timing signals that become a low level when the elapsed time is not less than the first time and not more than the sum of the first and second times.
4. The state information transmission according to claim 3, wherein the timing control unit outputs a logical product of a logical sum of the plurality of state detection signals and a logical product of the plurality of timing signals as the state information signal. apparatus. The plurality of detection units each include a plurality of sensors installed in the device to be monitored,
The plurality of state detection signals are set to the first level when an operation of the device to be monitored is not a predetermined operation at an installation location of the plurality of sensors, respectively. The state information transmitting device according to any one of claims 7 to 9. A status information transmitting device according to any one of claims 1 to 8,
A monitoring device for receiving the status information signal;
With
The said monitoring apparatus has a display part containing the indicator lamp lighted or extinguished according to the level of the said status information signal.   The monitoring system according to claim 9, wherein the monitoring device further includes a recording unit that records a change in the level of the state information signal.

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