JP4749277B2 - Survey system - Google Patents

Description

  The present invention relates to a survey system, and more particularly to a system capable of investigating the influence between related device devices in a time range corresponding to each device device.

  Conventionally, rather than a device that operates independently, a device that is connected to an individual device and operates in a related manner is generally used. For example, a drive command is output at a predetermined timing during continuous startup. A system that drives other devices can be constructed, or, as a simple system, power can be supplied to various load devices installed at various locations from distribution boards (devices) that receive and distribute commercial power. It is done to operate. In this distribution system, changes in the power quality supplied and distributed from the distribution board have an effect on the drive of various devices that receive and operate the power, and conversely, changes in the various devices result in the quality of the distribution power. May be affected.

  For example, in the power distribution system, when a voltage drop instantaneously (including a power failure) occurs in the distribution power, the processing operation of various devices that operate by receiving the power is interrupted. There is a possibility of coming out. Since this instantaneous drop is instantaneous, it is impossible to correlate the change in power quality with the change in various devices, and the change in the processing operation of each device is affected by the instantaneous drop in the distribution power. I could not investigate.

From this, the applicant can record the instantaneous drop in the distribution power and the change in the various devices substantially simultaneously, and whether the cause of the change in the processing operation of the various devices in each place is the instantaneous drop in the distribution power. An investigation system that makes it possible to identify this is proposed (see, for example, Patent Document 1).
JP 2006-29903 A

  However, in such a conventional investigation system, the state of the distribution device that supplies power in a stable state is recorded because it records the state change such as the distribution power and the instantaneous voltage waveform of each device. (Distribution power quality) is monitored and recorded in the long-time recording range, but it is not possible to monitor and record in the short-time recording range necessary to check the status change of each device. It was not possible to analyze by associating.

  When this is done, a recording staff who records the power quality of the power distribution equipment and a recording staff who records the processing operation at each device are arranged, and the recording data is compared and analyzed after the recording is completed. And the need for personnel, and it takes time to analyze the data, and it is difficult to be accurate and reliable because it is manual.

  Therefore, the present invention makes it possible to record the state change in a time corresponding to the investigation target, and records the association by associating and recording the timing of the state change in each device that operates with relevance. The purpose is to provide a survey system that is highly versatile and can be easily analyzed without the need for manpower so that the effects between devices that operate individually can be investigated. . It is another object of the present invention to improve versatility by connecting various devices according to the environment.

  According to a first aspect of the investigation system for solving the above-mentioned problems, one or two or more first investigation devices and one or two or more second investigation devices each having recording means for recording a change in the state of the investigation object are provided. A survey system in which survey devices are connected and arranged at a plurality of locations, the second survey device includes a monitoring unit that monitors a survey target, a detection unit that detects a change in the state of the target based on the monitoring information, Record the state change of the same or different target that monitors the state when generating the trigger signal, the signal generation unit that generates the trigger signal based on the detection information of the state change, the signal output unit that outputs the trigger signal to the outside The first investigation device further comprises signal input means for inputting a trigger signal sent from the second investigation device, and the recording means of the second investigation device comprises a state change unit. One recording range is set as the recording time, or two or more ranges can be selected and set, and a recording time range sufficient to record the state change is set. The means is designed so that one kind of range can be set or selected from two or more ranges as the state change recording time, and the recording time range sufficient to record the state change during the investigation period is set. In addition, the trigger signal input timing from the second investigation device is held in association with the state change of the investigation object.

  In this invention, when the state change of the investigation object occurs (detected), the second investigation device records the state change to be monitored or the different state change and generates and outputs the trigger signal, while the first investigation device The device continuously records changes in the state of the investigation target during the investigation period, and when a trigger signal is input from the second investigation device, the trigger signal input timing corresponds to the recorded information (state change) Attach and hold. Therefore, it is possible to investigate and record a change in the status of a device that changes appropriately without requiring human intervention in a necessary short time, and to respond to a status change in which the occurrence timing of the status change is investigated and recorded over a long period of time for a device that operates normally. It can be attached and recorded, and the analysis of the relevance of state changes between connected devices can be easily performed.

  According to a second aspect of the investigation system for solving the above problem, in addition to the specific matter of the first aspect, the first investigation device includes a monitoring means for monitoring a state of the investigation target, and a target based on the monitoring information. Detection means for detecting a change in the state of the signal, a signal generation means for generating a trigger signal based on the detection information of the state change, and a signal output means for outputting the trigger signal to the outside. The investigation apparatus includes signal input means for inputting a trigger signal sent from a separate investigation apparatus, and the recording means of the second investigation apparatus records a state change when the trigger signal is input from the separate investigation apparatus. It is characterized by doing.

  In the present invention, when the state change of the investigation object occurs (detected), the first investigation apparatus continues to record the state change of the investigation object and generates and outputs the trigger signal, while the second investigation apparatus When a trigger signal is input from a separate investigation device, the state change to be monitored or a different state change is recorded. Therefore, even when a change in state is observed in the investigation object of the first investigation device that investigates and records a change in state over a long period of time, it is possible to record the change in state of the investigation object of the second investigation device that varies as appropriate. In addition, it is possible to perform a more detailed analysis of the relevance of influence between connected devices.

  According to a third aspect of the investigation system for solving the above problem, in addition to the specific matter of the first or second aspect, at least a second investigation device is sent from the outside of the first and second investigation devices. In addition, a signal input means for inputting the trigger signal is provided, and when a trigger signal is input from the outside, the trigger signal is generated and output to the outside.

  In the present invention, when a trigger signal is received from a separate investigation device, the trigger signal can be output to the outside in the same manner. Therefore, a trigger signal can be passed between survey devices, and a plurality of second survey devices can be connected even when the number of input ports of the first survey device and the second survey device is small. In addition, when the first investigation device also has a signal input means, a plurality of the first investigation devices can be connected, and a trigger signal is delivered while investigation records are made over a long period of time. Can do.

  According to a fourth aspect of the investigation system for solving the above-mentioned problems, in addition to the specific matters of any of the first to third aspects, the investigation device includes an electric signal via a metal cable, an optical signal via an optical cable, A trigger signal is transmitted and received by a propagating radio wave signal or an optical signal propagating in the air.

  In the present invention, the first and second investigation devices can be easily connected to each other in the case of a metal cable, and an electrical signal of a trigger signal can be transmitted and received. In the case of an optical cable, the trigger can be performed without picking up surrounding noise. Optical signals can be transmitted and received, and when radio signals and optical signals are propagated in the air, trigger signals can be transmitted and received even when cables cannot be laid, especially by using flash for optical signals. A trigger signal can be sent and received. Therefore, wired connection or wireless connection can be performed according to the surrounding environment of the investigation target, and the number of cases where the installation cannot be performed can be reduced.

  According to a fifth aspect of the investigation system for solving the above problem, in addition to the specific matter of any of the first to fourth aspects of the invention, the trigger signal includes an identification signal for identifying the investigation device. Is.

  In this invention, the identification information of the investigation device that has detected the state change can be added to the detection timing of the state change of another investigation target that is stored in association with the state change recorded by the first investigation device. . Therefore, it is possible to specify the occurrence location of the state change in another investigation target from the record information of the state change of the first investigation device.

  According to a sixth aspect of the investigation system for solving the above-mentioned problems, in addition to the specific matters of any of the first to fifth aspects, the monitoring means monitors an apparatus state such as an electric waveform or an operation state of the investigation object. Then, the recording means records changes in the apparatus state such as an electrical waveform to be investigated or an operation state.

  In the present invention, it is possible to monitor and record state changes such as electrical waveforms and operating conditions. Therefore, for example, it is possible to monitor and record the power quality distributed to each site device, the power quality that has been distributed, the input signals and output signals of each site device, and the operation of the device can be monitored and recorded. it can.

  According to a seventh aspect of the investigation system for solving the above-mentioned problems, in addition to the specific matters of any of the first to sixth aspects, the recording means of the second investigation device is provided before the detection timing of the state change. It is characterized by leaving a record.

  In the present invention, for example, when the state change of the apparatus that varies as appropriate is investigated and recorded by the second investigation apparatus, the state change can be recorded before the state change detection timing. Therefore, even if the state change at the detection timing disappears when recording is started, the state change can be reliably recorded and left.

  As described above, according to the present invention, for example, it is possible to record a change in the state of a device that operates steadily over a long period of time, and to record a change in the state of a device that fluctuates as appropriate in a necessary short time. The occurrence timing of the change can be recorded and held in association with each other, and the relevance of the state change between the connected devices can be easily analyzed. Therefore, it is possible to easily investigate and grasp the influence of the connected device without manpower, and improve versatility. Further, versatility can be further improved by wire-connecting between apparatuses with a metal cable or an optical cable according to the installation environment, or by wireless connection with a radio wave signal or an optical signal propagating in the air.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, the best embodiment of the invention will be described with reference to the drawings. 1-13 is a figure which shows 1st Embodiment of the investigation system based on this invention.

  FIG. 1 is a diagram illustrating an example of equipment installed in a factory. A distribution board (power receiving board or distribution board) 101 that is connected to a substation equipment and distributes commercial power in the factory is installed. The distribution board 101 is connected to the production line equipment 102, the control boards 103 and 104, the sequencer 105, and the display board 106 in the production line 100.

  The production line equipment 102 includes, for example, a belt conveyor that conveys a product and various devices that process and inspect the product. Electric power supplied from the distribution board 101 is distributed via other devices. Various operations are executed by the relayed power. In addition, as various apparatuses which process and inspect the product of this production line equipment 102, for example, low-power equipment such as various sensors as well as high-power equipment such as a compressor, a rolling equipment, a pulverizer, a welding machine, and an arc furnace. A wide variety of facilities are located.

  The control boards 103 and 104 receive power supply from the distribution board 101 and exchange and control various control signals, detection signals, and the like with the sequencer 105 and the like, thereby performing overall control of the assigned locations of the production line equipment 102.

  The sequencer 105 receives power supply from the distribution board 101 and receives various control signals and detection signals from the control panels 104 and 105 and controls various timing signals for operating the production line equipment 102. The data is output to the panels 104 and 105 and the display panel 106. The display panel 106 receives various timing signals sent from the sequencer 105 and displays and outputs the operating status of the production line facility 102 by turning on / off / flashing the pilot lamps and displaying various instruments.

  The production line 100 is provided with a main investigation device (first investigation device) 10A and an individual investigation device (second investigation device) 10B. These investigation devices 10A and 10B should be designed as dedicated devices. However, in this embodiment, as shown in FIG. 2, each trigger signal transmission unit 12 that performs a desired function is connected to a commercially available measuring instrument 11 and assembled into a device having the same function. It is designed to be used by adjusting various settings according to the location. Here, the investigation device 10 (10A, 10B) includes a battery 13 such as a battery or a storage battery and is designed to be operable without receiving power supply from the distribution board 101. It can be connected to a commercial power supply via the AC adapter 14 provided. Further, in the present embodiment, the individual investigation devices 10B are arranged and connected to a single main investigation device 10A at a plurality of locations. However, a plurality of main investigation devices 10A may be provided. It goes without saying that 10B may be one.

  The measuring instrument 11 of the investigation apparatus 10 is a memory recorder that includes a sensor unit 27 that can record a plurality of types of waveforms and the like, and constitutes a monitoring unit, a detecting unit, a signal generating unit, and a recording unit. As shown in FIG. 2, a CPU (central processing unit) 21 that executes various processes according to control programs and parameters stored in advance, and a work that stores the control programs and parameters and temporarily stores data when performing various processes. Main memory 22 that also functions as an area, auxiliary memory 23 of a removable memory card that can store data of various processing results for a long time and can be used in common with a personal computer, a processed or unprocessed voltage waveform, etc. A display control unit 24 for causing the display unit 24a such as a display to output the data of The input / output control device 26 is connected to the input / output control device 26 via the signal line 25. The input / output control device 26 includes a trigger signal transmission unit 12 constituting a signal output means and a signal input means as the investigation device 10 for constructing the investigation system. The A / D converter 27a and the logic probe 27b constituting the sensor unit 27 and the operation switch 28 are connected.

  The input / output control device 26 functions as a so-called interface that adjusts signal information and operation information from the trigger signal transmission unit 12, the A / D converter 27a, the logic probe 27b, and the operation switch 28 so that the CPU 21 can process them. Various types of signals sent from the A / D converter 27a, the logic probe 27b, and the operation switch 28 are relayed while a trigger signal to be described later is exchanged between the trigger signal transmission unit 12 and the CPU 21 side. Information is received and transferred to the CPU 21 side. Specifically, the input / output control device 26 receives a voltage / current waveform for a plurality of channels converted from an analog signal to a digital signal by the A / D converter 27a, and a logic probe 27b converts the voltage / current waveforms to a plurality of channels. A logic signal based on the logic result (0/1 signal) is input, and the operation switch 28 operates a knob and the like according to what is to be recorded along with an operation input for turning on / off the power source. Accordingly, the range of the recording time can be arbitrarily selected, and the operation information is input to the input / output control device 26.

  As a result, this measuring instrument 11 can input and record the AC voltage / current waveforms at a plurality of locations via the A / D converter 27a as they are, for example, and input a logic signal at a plurality of locations via the logic probe 27b. Various signals can be displayed while performing measurement recording according to the long and short time ranges arbitrarily selected and set from the operation switch 28 according to what is to be recorded. The control unit 24 can perform display output on the display unit 24a. Here, the CPU 21 is connected to a clock unit 21a for grasping time information (real time clock), and the time information is associated with various signals received from the A / D converter 27a and the logic probe 27b on the display unit 24a. Display output can be performed.

  The measuring instrument 11 receives a logic signal from the logic probe 27b or a voltage / current waveform received from the A / D converter 27a of the sensor unit 27 via the input / output control device 26 exceeds a preset value. When the change in the measurement object is recognized, the voltage / current waveform or logic signal for the recording time specified in the setting range is recorded, and the input / output control device 26 is used for recording. A trigger signal is output to the trigger signal transmission unit 12. On the contrary, when the measuring instrument 11 receives a trigger signal from the trigger signal transmission unit 12 via the input / output control device 26, the measuring instrument 11 holds the signal data in the main memory 22 before receiving the trigger signal, while the sensor unit The voltage / current waveform and logic signal measured by the CPU 27 are recorded for a recording time of a voltage / current waveform and logic signal for a specified recording time in a set range, and recorded and held in correspondence with the reception timing of the trigger signal.

  On the other hand, the trigger signal transmission unit 12 of the investigation device 10, as shown in FIG. 4, stores a CPU 31 that executes various processes according to control programs and parameters stored in advance, and stores the control programs and parameters and performs various processes. The main memory 32 that also functions as a work area for temporarily storing data when performing the operation and information for notifying the presence / absence of transmission / reception of the trigger signal are displayed on the display unit 34a such as a display and the signal for turning on the patrol light 15 is provided. A display control unit 34 for output is connected to an input / output control device 36 via a bus 35. The input / output control device 36 includes a measuring instrument 11 as an investigation device 10 for constructing an investigation system, and others. I / O units 37a to 37 that are connected in parallel so that trigger signals can be exchanged with the investigation device 10 When the trigger signal input and output unit 39 and an operation switch 38 for exchanging trigger signals between are connected.

  The input / output control device 36 is designed to function as a so-called interface that adjusts signal information and operation information from the trigger signal input / output unit 39 and the operation switch 38 so that the CPU 31 can process them. While relaying a trigger signal exchanged between the output unit 39 and the CPU 31 side, the operation information sent from the operation switch 38 is received and transferred to the CPU 31 side.

  The trigger signal input / output unit 39 is designed to function as an interface for adjusting the trigger signal exchanged with the measuring instrument 11 and the I / Os 37a to 37d so that the input / output control device 36 (CPU 31 side) can receive the trigger signal. The trigger signal is transmitted / received to / from a directly connected device such as the measuring instrument 11, and the trigger signal is also transmitted / received to / from the investigation device 10 installed in a remote place. To do. Specifically, the trigger signal input / output unit 39 easily connects a metal cable for a LAN (local area network) to, for example, I / Os 37a to 37d incorporating a differential input device (see FIG. 16A). These I / Os 37a to 37d are in-phase by using the voltage difference between High-COM and Low-COM among the High / Low / COM three terminals of the LAN cable as a signal. A differential signal in which noise is canceled and reduced is received as an external trigger signal, and the differential signal is input to the I / Os 37a to 37d to transmit the trigger signal to the investigation apparatus 10 installed at a remote location. .

  In short, the input / output control device 36 and the trigger signal input / output unit 39 deliver a trigger signal exchanged between the measuring instrument 11 and the I / Os 37a to 37d and the CPU 31 side, and turn on / off the power from the operation switch 38. And the operation information for selecting whether to drive the patrol light 15 and the necessity of display output to the display unit 34a, etc. are received and transferred to the CPU 31 side.

  Thus, the trigger signal transmission unit 12 receives a trigger signal generated by the directly connected measuring instrument 11 and a trigger signal generated by the external measuring instrument 11 connected via the I / Os 37a to 37d. Then, the CPU 31 obtains time information (real time clock) from the clock unit 31a and displays and outputs a change in the investigation target (generation of a trigger signal) on the display unit 34a together with the time information and drives the patrol light 15 to notify it. At the same time, when the trigger signal transmission unit 12 receives the trigger signal from the directly connected measuring instrument 11, the trigger signal transmission unit 12 transmits the trigger signal to the external investigation device 10 via the I / Os 37a to 37d. When the trigger signal is received from the external investigation apparatus 10 via the I / O 37a to 37d, the voltage / current waveform measured by the sensor unit 27 by passing the trigger signal to the directly connected measuring instrument 11 The logic signal is recorded and the trigger signal reception timing is recorded and held.

  Specifically, the production line equipment 102, the control panels 103 and 104, the sequencer 105, the display panel 106, etc. in the production line 100 via a circuit breaker (MCCB: Molded Case Circuit-Breaker) of the distribution board 101, etc. As shown in FIG. 5, an induction motor (IM: Induction Motor), an electromagnetic contactor (MC: Electromagnetic Contactor), a push button switch (PBS), a relay (Ry) : Relay), green display lamp (GL: Green Lamp), red display lamp (RL: Red Lamp), etc. are connected, or a programmable controller (PLC: Programmable Logic Controller) is connected as shown in FIG. Yes.

  In such a device, voltage / current analog signals can be detected from various wirings such as a wiring breaker (MCCB), and the device operates in accordance with on / off of a push button switch (PBS). A logic signal is detected from the contact output of the relay (Ry) to detect the start / stop of various devices of the production line 100, and further, a relay according to an operation command (D / O) in the programmable controller (PLC) (Ry) operation can be detected by a magnetic sensor or the like to detect a logic signal for starting / stopping various devices of the production line 100 to detect the start / stop, or a pilot lamp for displaying the start-up (GL / RL) ON / OFF, etc., is detected by an optical sensor or the like, and logic signals for starting / stopping various devices of the production line 100 Detected and it is possible to detect the start and stop.

  Specifically, the analog voltage signal can be input to the wiring of the production line 100 by connecting the measuring instrument 11 directly to the wiring and circuit contacts, and the analog voltage signal can be input to the production line 100. Although it may be incorporated in a wiring or a circuit, in order to detect it as it is, as shown in FIG. 7 (a), a clamp type current sensor 42 for passing the monitoring target electric wire D into the clamp portion 42a is used as a measuring instrument. 11 to input. Further, when the clamp type current sensor 42 is used to monitor a wiring through which a weak current flows, for example, a wiring for exchanging digital signals, as shown in FIG. For example, the monitoring target electric wire D may be wound around the clamp portion 42a.

  As shown in FIG. 8, the logic signal detects a change in the magnetic field strength of the coil by connecting a magnetic field detection sensor 43 having a reed switch 43a or the like in the vicinity of the coil of the relay to the measuring instrument 11. Can be entered. The magnetic field detection sensor 43 includes the reed switch 43a housed in the container 43b. However, the magnetic field detection sensor 43 is not limited to the reed switch 43a, and may be, for example, a hall means, an MR means (magnetoresistance effect means), or the like. Further, as shown in FIG. 9, the magnetic field detection sensor 43 confirms the direction of the magnetic field generated from the relay coil by connecting the three reed switches 43a in parallel so that each of the XYZ directions becomes the detection direction. It can also be installed without doing.

  Furthermore, as a logic signal, as shown in FIG. 10, the pilot lamp is connected to the measuring instrument 11 by connecting an optical sensor 44 that installs a phototransistor 44 a or the like at the facing position of the pilot lamp in the circuit of the production line 100. It is possible to detect and input a change in light intensity when turning on / off. Note that the photosensor 44 is a container in which a phototransistor 44a is accommodated in a container 44b in which a cylindrical inner peripheral surface is processed into a reflection surface. Also good. Further, as shown in FIG. 11, the optical sensor 44 is installed so that an optical fiber 45 is interposed between the optical sensor 45 and the pilot lamp so that the light of the pilot lamp is incident from the end 45a of the optical fiber 45. The light can be emitted toward the light detection surface of the optical sensor 44 so that the visibility of the pilot lamp is not lowered.

  Thereby, as shown in FIG. 12, the investigation devices 10A and 10B in the production line 100 acquire the analog signal (voltage value / current value) or logic signal for each sampling period (step 21). S1) The sampling data is stored in the auxiliary memory 23 (step S2), and various power quality parameters (voltage flicker, harmonics, voltage imbalance, etc.) are calculated from the sampling data of the analog signal, for example ( In step S3), the calculation result is stored as time series data in the main memory 22 together with the time information of the clock unit 21a (step S4). Here, the voltage flicker of the power quality parameter is a phenomenon caused by the voltage fluctuation of the power system caused by the irregular fluctuation of the load, and the harmonic is 50 Hz of the basic frequency component of the voltage / current waveform in the power system. And frequency components other than 60 Hz, and voltage imbalance is a phenomenon in which an imbalance occurs in the effective value of the voltage of each phase and the phase angle difference between phases in the power system (for details, refer to IEEJ Technical Report No. 978). (See pages 4 to 7).

  That is, according to preset conditions, for example, the measuring instrument 11 (CPU 21) of the individual investigation apparatus 10B is set to a short time recording range that is detected with high resolution, so that the capacity of the auxiliary memory 23 is insufficient. In that case, steps S1 to S4 are repeated so that the time series data of the calculation result is stored in the main memory 22 while erasing from the oldest data and retaining the latest sampling data, while measuring by the main investigation device 10A. The device 11 (CPU 21) can hold the sampling data in the auxiliary memory 23 for a long time by setting the recording range for a long time to be detected with low resolution, so that the calculation is performed while holding all the sampling data. Steps S1 to S4 are repeated so that the resulting time series data is stored in the main memory 22. Return (step S5).

  At this time, in the investigation devices 10A and 10B in the production line 100, the measuring instrument 11 (CPU 21) acquires a logic signal associated with the start / stop of the load device, or the occurrence of an abnormality such as a voltage waveform exceeding a set value or the power supply When the occurrence of an abnormality in the quality parameter is recognized, a trigger signal is generated and output to the other investigation devices 10A and 10B via the trigger signal transmission unit 12 (step S6). The received measuring instrument 11 (CPU 21) stores the sampling data in the main memory 22, and also receives the trigger signal reception timing (time information) and the type of the trigger signal (the generation factor in the own device and the trigger signal transmission unit 12. Corresponding I / O channels (identification information of the investigation device 10)) Holding (Step S4). In addition, when the trigger signal transmission unit 12 of the investigation device 10 transmits and receives a trigger signal, the trigger signal transmission unit 12 displays and outputs information on the trigger signal reception timing and the type of the trigger signal on the display unit 34a according to the setting of the operation switch 38. The patrol light 15 is turned on for notification. That is, the main memory 22 constitutes a recording unit. The measuring instrument 11 (CPU 21) monitors the presence / absence of a logic signal to be monitored or whether or not an abnormality is found in an analog signal such as a voltage waveform or a power quality parameter, and records the detected / detected state change. However, the present invention is not limited to this, and the monitoring target may be separated from the recording target. For example, the presence or absence of a logic signal or the occurrence of an abnormality in an analog signal such as a voltage waveform is monitored, and the electrical signal waveform at another location is monitored. It may be designed to record video or the like by a separately installed video camera or the like.

  Thereafter, the measuring instrument 11 (CPU 21) of the individual investigation device 10B, when the data amount in the main memory 22 reaches a preset value or when the recording time specified by the set range is reached, While shifting to the standby state in which the measurement is stopped and the monitoring state is continued, the measuring instrument 11 (CPU 21) of the main investigation device 10A can hold the sampling data during the investigation period. The acquisition of data such as the power quality of the distribution board 101 is continued.

  Therefore, for example, as shown in FIG. 13, the measuring instrument 11 of the main investigation device 10 </ b> A is capable of measuring various evaluation items (for example, ΔV10, total voltage distortion rate, etc.) of sampling data from the start to the end of the investigation period. The change can be recorded in association with the I / O channel (trigger signal generation / output location) of the trigger signal transmission unit 12 that has received the trigger signal together with the trigger signal reception timing. By identifying the investigation object (device) of the investigation device 10 connected to the 12 I / O channels and confirming its operation status, the fluctuation factors of the evaluation items can be determined based on the operation status of the device and the power supply in the device. It can be analyzed according to quality.

  As described above, in the present embodiment, the state change (operation status) such as the start / stop of the production line equipment 102 is recorded in a necessary short time, and the power quality from the distribution board 101 of the production line 100 that operates normally. Can be recorded in association with the start / stop while recording over a long period of time, for example, the influence of the power quality from the distribution board 101 given by the start / stop of the production line equipment 102, etc. Can be analyzed. Accordingly, it is possible to easily investigate and grasp the relationship between the distribution board 101 and the production line equipment 102 in a short time without manpower such as placing personnel at various locations on the production line 100. The versatility of the system can be improved.

  Next, FIGS. 14-16 is a figure which shows 2nd Embodiment of the investigation system which concerns on this invention. Here, since this embodiment is configured in substantially the same manner as the above-described embodiment, the same components are denoted by the same reference numerals while diverting the drawings, and the characteristic portions will be described (other features described below). The same applies to the embodiment).

  14 and 15, the trigger signal transmission unit 12 of the investigation device 10 (10A, 10B) is provided with I / O units 51 to 54 that connect the other investigation devices 10 so that a trigger signal can be exchanged. The I / O units 51 to 54 exchange trigger signals with other investigation apparatuses 10 by different transmission methods.

  As shown in FIG. 16A, the I / O unit 51 is constructed as a wired unit by incorporating a differential input device 51a and connected to the trigger signal input / output unit 39. This I / O unit Similarly to the above-described embodiment, 51 is connected to a remote survey apparatus 10 by, for example, easily connecting a metal cable for LAN and transmitting / receiving a differential signal using three terminals of High / Low / COM. A clear trigger signal can be exchanged.

  Here, since the I / O unit 51 of the investigation device 10 is connected by a metal cable, there are obstacles such as walls, doors, and facilities that shield light and radio waves described later between the investigation devices 10. Even so, the trigger signal can be transmitted and received, and the trigger signal can be transmitted and received by laying a metal cable over a long distance where light and radio waves are difficult to reach.

  As shown in FIG. 16B, the I / O unit 52 is constructed as a wired unit by incorporating an optical transmission device 52a and connected to the trigger signal input / output unit 39. Can easily connect an optical cable containing an optical fiber capable of transmitting an optical signal to convert the optical signal into an electrical signal, and conversely, convert the electrical signal into an optical signal to connect with the remote survey device 10. Clear trigger signals can be exchanged between them.

  Here, even if there is an obstacle to be shielded between the I / O units 52 of the investigation apparatus 10 as in the case of the I / O unit 52, a trigger signal can be transmitted and received even over a long distance. At the same time, since electrical noise does not ride on the transmitted optical signal, the trigger signal can be transmitted and received even if there is equipment or the like that is the source of noise between the investigation devices 10.

  As shown in FIG. 16C, the I / O unit 53 is constructed as a wireless unit by incorporating a wireless module 53a and an encoder / decoder 53b, and is connected to the trigger signal input / output unit 39. The / O unit 53 transmits the radio signal received by the wireless module 53a from the external investigation device 10 to the trigger signal input / output unit 39 while the encoder / decoder 53b decodes the electric signal to the external investigation device 10 When the electrical signal to be received is received, the electrical signal is encoded by the encoder / decoder 53b, and the wireless module 53a transmits the signal to the external investigation device 10, whereby the trigger signal can be exchanged without a wired connection.

  Here, since there is no need to connect the I / O unit 53 of the investigation apparatus 10 with a trigger signal by a radio signal that propagates in the air and wired connection, the investigation apparatus 10 is installed even when a metal cable or the like cannot be laid. Survey system can be constructed.

  As shown in FIG. 16D, the I / O unit 54 is constructed as a strobe unit by incorporating a light receiving unit 54a and a comparator 54b on the light receiving side and a light emitting unit 54c and a strobe light emitting circuit 54d on the light emitting side. The I / O unit 54 is connected to the trigger signal input / output unit 39. The light receiving unit 54a receives light emitted from the external investigation device 10 and photoelectrically converts the electrical signal, and the comparator 54b provides an external signal. When it is confirmed that the light is emitted from the investigation device 10, it is delivered to the trigger signal input / output unit 39 as a trigger signal. On the other hand, when a trigger signal (electrical signal) transmitted to the external investigation device 10 is received, On the basis of this, the strobe light emitting circuit 54d drives the light emitting unit 54c to emit light toward the external investigation device 10, thereby wired. It is possible to exchange the trigger signal without having to continue.

  The light receiving section 54a of the I / O section 54 includes a photoelectric conversion element such as a phototransistor that photoelectrically converts received light and outputs an electrical signal, and collects light from the outside on the front side of the phototransistor. A comparator 54b is triggered when a condensing lens (which may be a condensing mirror) is attached and the photoelectrically converted electrical signal has a preset intensity or higher than that of the surrounding background light. It is determined that the signal is received, and is passed to the trigger signal input / output unit 39.

  The light emitting unit 54c of the I / O unit 54 is configured by a so-called strobe device that immediately emits a strong light flash by instantaneously passing a high-voltage current through the discharge tube, and the flash (strobe light) is parallel. A condensing lens for emitting light is attached to the front surface of the discharge tube, and a condensing plate is attached to the back side of the discharge tube so as to reflect the flash light toward the front side. The light emitting unit 54c is installed so as to face the other light receiving unit 54a that transmits the trigger signal, and the light emission is controlled by the strobe light emitting circuit 54d that has received the trigger signal transmitted to the other investigation device 10, thereby flashing. To be received by the other light receiving unit 54a.

  Here, the I / O unit 54 of the investigation device 10 does not need to be wired and connected by sending and receiving a trigger signal by flash light (optical signal) propagating in the air. Therefore, even when a metal cable or the like cannot be laid, the investigation device 10 can be installed to construct an investigation system, and disturbance electric waves are not carried on the flash light transmitted like radio signals, so that facilities that are sources of disturbance electric waves between the investigation devices 10, etc. Even if there is, the trigger signal can be transmitted and received instantaneously. Needless to say, if it is not necessary to complete the transmission of the trigger signal instantaneously, a device capable of emitting light with high light intensity may be used.

  Therefore, in the investigation apparatus 10 including the I / O units 51 to 54 in the trigger signal transmission unit 12, the type of transmitting the trigger signal can be selected according to the environment of the place where the trigger signal transmission unit 12 is installed.

  As described above, in this embodiment, in addition to the operational effects of the above-described embodiment, the environment in which the investigation system cannot be constructed can be reduced as much as possible, and the trigger signal can be reliably transmitted without being affected by the environment. You can complete the quality survey. Therefore, the versatility of the survey system can be improved.

Next, FIGS. 17-19 is a figure which shows 3rd Embodiment of the investigation system based on this invention.
In FIG. 17, the trigger signal transmission unit 12 of the investigation device 10 (10A, 10B) has input / outputs to and from the I / O units 51 to 54 that exchange trigger signals with other investigation devices 10 by different transmission methods. A trigger signal input / output unit 61 is interposed between the control device 36 and the trigger signal input / output unit 61. An external investigation device 10 that exchanges trigger signals via the I / O units 51 to 54 is provided. Setting from the operation switch 38 realizes a serial connection of the investigation devices 10 that exchange trigger signals.

  Specifically, when the trigger signal input / output unit 61 receives the trigger signal generated by the measuring instrument 11 from the input / output control device 36, the trigger signal input / output unit 61 uses, for example, an investigation as a trigger signal including identification information allocated to the own device. While passing the trigger signal continuous for the number of target device numbers to the external investigation apparatus 10 set as the other party via the trigger signal transmission unit 12 (I / O units 51 to 54), the outside of the other party When the continuous trigger signal corresponding to the number of device numbers is received from the survey device 10, the continuous trigger signal is directly passed to the CPU 31 side via the input / output control device 36 and also to the external survey device 10 of another partner. The continuous trigger signal is sent as it is. That is, the trigger signal input / output unit 61 generates a trigger signal and outputs it to another external investigation device 10 when a trigger signal is input from the external investigation device 10. Is configured. In this embodiment, the case where the investigation target is identified by the continuous trigger signal is described. However, the present invention is not limited to this, and the identification pattern of the investigation target can be increased by changing the interval between successive signals.

  For this reason, for example, as shown in FIG. 18, in the case of a setting environment with a good view between the main investigation device 10A and the individual investigation device 10B1, the light receiving unit 54a of the I / O unit 54 of each strobe unit 54 emits light. A trigger signal of flash light (strobe light) propagating in the air is installed facing the unit 54c so as to be able to transmit and receive. Further, when the installation environment with the noise generating device N is between the main investigation device 10A and the individual investigation device 10B2, an optical cable is connected to the I / O unit 52 of each wired unit to trigger the optical signal. To be able to send and receive. Further, in the case where the individual survey device 10B3 is installed in another company building near the individual survey device 10B2 than the main survey device 10A, a LAN cable is connected to the I / O unit 51 of each wired unit. As a result, the trigger signal can be transmitted to and received from the main survey device 10A via the individual survey device 10B2. Thereby, a trigger signal can be connected so that clear exchange is possible between 10A of main investigation apparatuses and individual investigation apparatus 10B1-10B3.

  For this reason, in these investigation apparatuses 10A and 10B, the measuring instrument 11 (CPU 21) acquires a logic signal associated with the start / stop of the load apparatus, the occurrence of an abnormality in which a voltage waveform or the like exceeds a set value, or an abnormality in a power quality parameter. When the occurrence is recognized, as shown in FIG. 19, a continuous trigger signal corresponding to the device number to be investigated is generated and output to the other investigation devices 10A and 10B via the trigger signal transmission unit 61 and transmitted as they are. be able to.

  The measuring instrument 11 (CPU 21) that receives the internal or external continuous trigger signal stores the sampling data in the main memory 22, and also receives the continuous trigger signal reception timing (time information) and the generation factor of the continuous trigger signal. And identification information to be investigated can be stored in association with each other, and various processes can be performed as in the system configuration in which the investigation devices 10 are connected in parallel as in the above-described embodiment.

  Accordingly, in the investigation devices 10A, 10B2, and 10B3 in which the trigger signal exchange paths are connected in series, the continuous trigger signal having the identification information can be distributed all over as in the above-described embodiment, and the measurement of the main investigation device 10A is possible. The device 11 receives a continuous trigger signal from the individual investigation device 10B3 connected in series, and the time of various evaluation items (for example, ΔV10, total voltage distortion rate, etc.) of sampling data from the start to the end of the investigation period. It is possible to record and hold the trigger signal reception timing and the generation / output location of the trigger signal in association with the change. As a result, by identifying the device connected to the I / O channel of the trigger signal transmission unit 12 and confirming its operation status, the fluctuation factors of the evaluation items can be determined based on the operation status of the device and the power quality of the device. Can be analyzed according to

  As described above, in the present embodiment, in addition to the operational effects of the above-described embodiment, the survey system is configured by connecting the nearby survey devices 10A and 10B to each other from the survey device 10A to the entire survey device 10B without connecting cables or the like. While being able to construct | assemble easily, investigation apparatus 10A, 10B can be connected, without I / O part 51-54 of the trigger signal transmission unit 12 becoming insufficient. Therefore, the usability of the survey system can be improved.

  Here, in this embodiment, the case where all of the investigation devices 10 include the measuring instrument 11 will be described. However, a relay device that relays only a continuous trigger signal without the measuring instrument 11 may be installed, The survey system may be constructed using the survey device 10 as a relay device. In this case as well, it is possible to obtain the same operational effects as in the above-described embodiment, and to more easily construct and install the investigation system.

  Although one embodiment of the present invention has been described so far, it is needless to say that the present invention is not limited to the above-described embodiment, and may be implemented in various forms within the scope of the technical idea.

It is a figure which shows 1st Embodiment of the investigation system which concerns on this invention, and is an arrangement | positioning figure which shows arrangement | positioning relationship with the equipment of the investigation object. It is a conceptual diagram which shows the schematic whole structure of the investigation apparatus. It is a block diagram which shows schematic structure of the measuring device which monitors and detects the investigation object. It is a block diagram which shows schematic structure of the unit which transmits the trigger signal which the measuring device produces | generates. It is a schematic circuit diagram explaining the relationship of the investigation object. It is a schematic circuit diagram which shows a part of the investigation object. It is a figure which shows the instrument which is connected to the measuring device and monitors and detects an investigation object, (a) is a perspective view which shows the whole structure, (b) is a perspective view which shows the application example. It is a see-through | perspective perspective view which shows the whole structure of the instrument which connects to the measuring device and monitors and detects a test object. It is a see-through | perspective perspective view which shows the other aspect of the instrument shown in the FIG. It is a see-through | perspective perspective view which shows the whole structure of the instrument which connects to the measuring device and monitors and detects a test object. It is a see-through | perspective perspective view which shows the other aspect of the instrument shown in the FIG. It is a flowchart explaining the investigation. It is a figure which shows an example of the investigation result, (a) is a graph which shows the state change of the investigation object, (b) is a graph which shows the operating condition of the other investigation object. It is a figure which shows 2nd Embodiment of the investigation system which concerns on this invention, and is a conceptual diagram which shows the schematic whole structure of the instantaneous drop investigation apparatus. It is a block diagram which shows schematic structure of the unit which transmits the trigger signal. It is a figure which shows the principal part structure of the unit, (a)-(d) is a block diagram which shows the unit structure which transmits the trigger signal of a different kind. It is a figure which shows 3rd Embodiment of the investigation system which concerns on this invention, and is a block diagram which shows schematic structure of the unit which transmits the trigger signal. It is an arrangement | positioning figure which shows the connection which exchanges a trigger signal between the investigation apparatuses. It is a related connection figure explaining the trigger signal exchanged between the investigation apparatuses.

Explanation of symbols

10 …… Investigation device 10A …… Main investigation device 10B …… Individual investigation device 11 …… Measurement device 12 …… Trigger signal transmission unit 13 …… Battery 14 …… AC adapter 15 …… Patlite 21, 31 …… CPU 21a, 31a: Clock unit 22, 32 ... Main memory 23 ... Auxiliary memory 24, 34 ... Display control unit 24a, 34a ... Display unit 26, 36 ... Input / output control device 27 ... Sensor unit 27a ... A / D converter 27b …… Logic probe 28, 38 …… Operation switches 37a to 37c, 51 to 54 …… I / O unit 39, 61 …… Trigger signal input / output unit 42 …… Clamp-type current sensor 43 …… Magnetic field detection Sensor 43a …… Reed switch 44 …… Optical sensor 44a …… Phototransistor 45 …… Optical fiber 51a …… Differential input Vice 52a …… Optical transmission device 53b …… Encoder / decoder 53a …… Wireless module 54b …… Comparator 54d …… Strobe light emitting circuit 54a …… Light receiving part 54c …… Light emitting part 100 …… Production line 101 …… Distribution panel 102 …… Production line equipment 103, 104 …… Control panel 105 …… Sequencer 106 …… Display panel N …… Noise generating equipment

Claims (6)

In an investigation system in which one or two or more first investigation devices and one or two or more second investigation devices each having recording means for recording a change in state of an investigation object are connected and arranged at a plurality of locations. There,
The second investigation device includes a monitoring unit that monitors the investigation target, a detection unit that detects a change in the state of the target based on the monitoring information, and a signal generation unit that generates a trigger signal based on the detection information of the state change And a signal output means for outputting the trigger signal to the outside, and a recording means for recording the state change of the same or different target for monitoring the state when the trigger signal is generated ,
The first survey device, Rutotomoni includes a signal input means for inputting a trigger signal sent from the second survey device,
At least the second investigation device of the first and second investigation devices has a signal input means for inputting a trigger signal sent from the outside, and when the trigger signal is inputted from the outside, the trigger signal Is generated and output to the outside .
The recording means of the second investigation device is designed so that one type of range can be set as the recording time of the state change or can be selected and set from two or more ranges, and there is a sufficient recording time range to record the state change. While set
The recording means of the first investigation device is designed so that one type of range can be set as the recording time of the state change or can be selected and set from two or more ranges, and is sufficient to record the state change during the investigation period. A survey system characterized in that a time range is set and the trigger signal input timing from the second survey device is held in association with a state change of the survey target. The first investigation device generates a trigger signal based on monitoring means for monitoring the state of the investigation object, detection means for detecting a change in the state of the object based on the monitoring information, and detection information on the state change. A signal generating means and a signal output means for outputting the trigger signal to the outside;
Survey system of claim 1 wherein the second survey device, characterized in that the recording means when the input of the trigger signal from another number of survey device to record state changes. 3. The trigger device according to claim 1 , wherein the investigation device transmits and receives a trigger signal by an electrical signal via a metal cable, an optical signal via an optical cable, a radio signal propagating in the air, or an optical signal propagating in the air. Survey system. The survey system according to claim 1 , wherein the trigger signal includes an identification signal for identifying a survey device. The monitoring means monitors the state of the device such as the electrical waveform or operation status of the investigation object,
The investigation system according to any one of claims 1 to 4 , wherein the recording unit records a change in an apparatus state such as an electrical waveform to be investigated or an operation state. 6. The investigation system according to claim 1, wherein the recording means of the second investigation device keeps a record from before the detection timing of the state change.

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