JP2012117960A - Data collection device and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a data collection device capable of surely collecting information when a trigger condition is satisfied, while suppressing the amount of data received form a data collecting destination.SOLUTION: Under condition that a prior measurement condition is defined as a previous step of satisfying the trigger condition, a data collection device 1 monitors operation command information from an operation command device 3, as a result of the monitoring, when determining that the prior measurement condition is satisfied, commands a control apparatus 2 to buffer the sensor value for a motor 21 and, when determining that the trigger condition is satisfied, commands the control apparatus 2 to transmit the buffered sensor value. This constitution can surely collect sensor values when the trigger condition is satisfied, while suppressing the amount of data received from the control apparatus 2.

Description

  The present invention relates to a technique for efficiently collecting data from a plurality of devices.

The data collection device is connected to a plurality of devices and collects and records data acquired by each device.
For example, when the data collection device is connected to a plurality of control devices, in order to detect a failure or abnormality of each control device, state information indicating the operation state of each control device is collected and recorded.
The state information is, for example, various sensor values.
The data collection device usually uses information that the data collection device can obtain, for example, an operation command or a sensor value as a trigger condition, and when a set trigger condition is satisfied (for example, when a drive command is received, a specific sensor value The information is accumulated.
For example, Patent Document 1 proposes a method that allows a trigger condition to be set from the outside so that the trigger condition can be changed or added without exchanging the data collection device.
At this time, in order to cope with the problem that the time delay of the information serving as the trigger condition and the processing delay for the condition determination occur and the information when the trigger condition is satisfied cannot be acquired, the data collection device of Patent Document 1 is always a control device. Status information is collected, and the collected status information is temporarily stored in a buffer in the data collection device to determine whether the trigger condition is satisfied.
When the trigger condition is satisfied, the data collection device can record the state information after the trigger condition is satisfied from the state information stored in the buffer by transferring the buffer contents to the recording memory.

JP-A-6-261408

Since the conventional data collection apparatus needs to always collect information in order to obtain information when the trigger condition is satisfied, there is a problem that the transmission load is high.
In particular, when sensor analog waveform information necessary for deterioration judgment and life prediction is acquired with high accuracy and high sampling, there is a problem that a large capacity information transmission facility is required and the facility becomes expensive.
In addition, in order to acquire information in a certain time range before and after the trigger condition is satisfied, it is necessary to always accumulate information for the time range in the buffer. For this reason, the buffer capacity of the data collection device is also increased. There is a problem that the scale of the entire system becomes expensive as a result.

  One of the main objects of the present invention is to solve the above-described problems, and a data collection device that can reliably collect information when a trigger condition is established while suppressing the amount of data received from the data collection destination. The main purpose is to realize.

The data collection device according to the present invention is:
A data collection device for receiving acquired data acquired by the data acquisition device from a data acquisition device for acquiring data,
A communication unit communicating with the data acquisition device;
A condition definition information storage unit that stores condition definition information that defines a condition for transmitting acquisition data from the data acquisition device as a trigger condition;
A buffering start instruction unit that transmits a buffering start instruction from the communication unit to the data acquisition device to instruct the data acquisition device to start buffering of acquisition data before a situation where a trigger condition is satisfied occurs. When,
A data transmission instruction for transmitting a data transmission instruction from the communication unit to the data acquisition apparatus to transmit the buffered acquisition data when a situation where a trigger condition is satisfied occurs. Part.

  According to the present invention, the data acquisition device is instructed to buffer acquisition data before the trigger condition is satisfied, and the data acquisition device is instructed to transmit the buffered acquisition data when the trigger condition is satisfied. Therefore, it is possible to reliably collect the acquired data when the trigger condition is satisfied while suppressing the amount of data received from the data acquisition device.

FIG. 3 is a diagram illustrating an example of a system configuration according to the first embodiment. FIG. 3 is a diagram showing an outline of the operation of the data collection device according to the first embodiment. FIG. 3 is a diagram illustrating an example of a state model according to the first embodiment. FIG. 3 is a flowchart showing an operation example of the data collection device according to the first embodiment. FIG. 3 is a diagram illustrating a module configuration example of the data collection device according to the first embodiment. FIG. 3 is a diagram illustrating a hardware configuration example of the data collection device according to the first embodiment.

Embodiment 1 FIG.
In the present embodiment, for the trigger condition set by the user, a preceding measurement condition indicating a stage before the trigger condition is satisfied is generated, and when the preceding measurement condition is satisfied, information acquisition (operation state Measurement) and buffering of information.
Furthermore, when the trigger condition is satisfied, the data collection device receives information buffered in each device.
As a result, the data collection device can suppress the amount of data received from each device and efficiently collect information from the previous stage before the trigger condition is established.
Hereinafter, a data collection device according to the present embodiment will be described with reference to the drawings.

  FIG. 1 is a system configuration diagram showing a device configuration when the data collection device according to the present embodiment is applied to a motor control system as an example.

In FIG. 1, a data collection device 1 is connected to a plurality of control devices 2 and an operation command device 3 via a transmission path 4 such as a communication cable, and communicates with the plurality of control devices 2 and the operation command device 3. Sensor values are collected from the control device 2.
The data collection device 1 includes a storage 12 that accumulates collected sensor values.
Details of the data collection device 1 will be described later.

Based on the operation command information from the operation command device 3, the control device 2 outputs a control signal to the motor 21 that is a control target, and inputs a sensor value 22 of a sensor disposed in the motor 21.
In addition, the control device 2 includes a buffer that accumulates the sensor value 22.
The control device 2 is an example of a data acquisition device, and the motor 21 is an example of a target device.
The sensor value 22 acquired by the control device 2 is an example of acquired data.

The operation command device 3 outputs operation command information that is a control instruction for the control device 2.
The operation command information from the operation command device 3 is duplicated by a switch device (relay device) arranged in the transmission path 4, and the operation command information is duplicated not only in each control device 2 but also in the data collection device 1. Is entered.

  FIG. 5 shows a module configuration example of the data collection device 1 according to the present embodiment.

In FIG. 5, the trigger condition setting unit 101 inputs a trigger condition from the user of the data collection device 1, stores the input trigger condition in a collection trigger condition storage unit 104 described later, and a preceding measurement condition generation unit 102 described later. Output to.
In the present embodiment, the trigger condition is a condition for transmitting the sensor value 22 (acquired data) from each control device 2.
The trigger condition setting unit 101 is an example of a trigger condition input unit.

The preceding measurement condition generation unit 102 receives a trigger condition from the trigger condition setting unit 101, and generates a value representing a state in the previous stage of the state where the input trigger condition is satisfied as a preceding measurement condition.
The preceding measurement condition is a condition for starting buffering of sensor values in each control device 2, and is an example of a buffering start condition.
The preceding measurement condition generation unit 102 is an example of a buffering start condition designation unit.

The state model storage unit 103 stores a state model used by the preceding measurement condition generation unit 102 to generate the preceding measurement condition.
The state model is information obtained by modeling change characteristics in the motor 21, for example, as shown in FIG.
The state model indicates a specification criterion that is a reference when the preceding measurement condition generation unit 102 specifies the preceding measurement condition, and is an example of reference information.
The state model storage unit 103 is an example of a reference information storage unit.
Details of the state model will be described later with reference to FIG.

The collection trigger condition storage unit 104 stores the trigger condition input by the preceding measurement condition generation unit 102 and the preceding measurement condition generated by the preceding measurement condition generation unit 102 as the collection trigger condition.
The collection trigger condition is an example of condition definition information, and the collection trigger condition storage unit 104 is an example of a condition definition information storage unit.

The information management unit 105 transmits a measurement instruction (buffering start instruction) for instructing to start buffering of the sensor value from the communication unit 106 to the control device 2 before a situation where the trigger condition is satisfied occurs.
Specifically, the information management unit 105 transmits a measurement instruction from the communication unit 106 to the control device 2 when a situation where the preceding measurement condition is satisfied occurs.
In addition, the information management unit 105 sends a collection instruction (data transmission instruction) from the communication unit 106 to the control device 2 to instruct to transmit the buffered sensor value when a situation where the trigger condition is satisfied occurs. To send.
The information management unit 105 is an example of a buffering start instruction unit and a data transmission instruction unit.

  The communication unit 106 transmits / receives data to / from the plurality of control devices 2 and the operation command device 3 via the transmission path 4.

  Next, the operation will be described.

The control device 2 receives the operation command information of the operation command device 3 via the transmission path 4, and controls the rotational torque of the motor 21 according to the content of the operation command.
The control device 2 inputs a sensor value 22 such as a current value and a torque value from the motor 21 in order to perform a control calculation of the motor 21 and an abnormality determination.
The control device 2 normally discards the sensor value 22 after being used for control calculation and abnormality determination.

The data collection device 1 collects a copy of the operation command information to the control device 2 by monitoring the transmission line 4 and determines whether or not the preceding measurement condition generated by the method for generating the preceding measurement condition described later is satisfied. If the preceding measurement condition is satisfied, a measurement instruction is transmitted to the control device 2 via the transmission path 4.
Further, the data collection device 1 determines whether or not the trigger condition is satisfied, and transmits a collection instruction to the control device 2 via the transmission path 4 if the trigger condition is satisfied.

The control device 2 starts buffering the sensor value 22 when receiving the measurement instruction.
Further, the control device 2 outputs the sampling information of the sensor value 22 buffered when receiving the collection instruction to the transmission path 4.
The data collection device 1 receives the sampling information of the sensor value 22 from the control device 2 and accumulates it in the storage 12.

Here, a method for generating the preceding measurement condition will be described.
FIG. 2 shows that the data collection device 1 generates a preceding measurement condition from the trigger condition setting, transmits a measurement instruction when the preceding measurement condition is satisfied, and transmits collection information when the trigger condition is satisfied. FIG. 6 is a flowchart showing a process from receiving a sensor value 22 from a control device 2 to accumulating the sensor value 22 in a storage 12.

First, the trigger condition setting unit 101 sets a trigger that the user wants to collect.
Here, items that can be collected by the data collection device 1 by monitoring the transmission path 4 are listed as the condition items 201.
For example, the current time, environmental information such as temperature and humidity, status information such as motor rotation speed, operation information such as operation switching, and the like are examples of items.
The user specifies an item (trigger condition) to be selected from the listed items, and the trigger condition setting unit 101 inputs information indicating the item specified by the user, combines the items specified by the user, Set a set of trigger conditions.
The set of set trigger conditions is stored in the collection trigger condition storage unit 104 and delivered to the preceding measurement condition generation unit 102.

The preceding measurement condition generation unit 102 generates a preceding measurement condition from the trigger condition.
In generating the preceding measurement condition, the preceding measurement condition generating unit 102 acquires the state model 202 from the state model storage unit 103.
The state model 202 is obtained by modeling the change characteristics for each item of the condition item 201, and indicates a designation standard that is a standard for designating the preceding measurement condition.
The state model 202 is roughly divided into three types of categories as shown in FIG. 3, and the preceding measurement condition generation unit 102 determines which of the following three types of categories the input trigger condition belongs to. Then, the preceding measurement condition is generated based on the state model of the preceding measurement condition in the determined category and the input trigger condition.

The model (1) shown in FIG. 3A changes linearly with respect to time, and shows a value whose value can be predicted with respect to elapsed time. This is the time information.
In this case, the preceding measurement condition with respect to the trigger condition coincides with the reverse characteristic of the time change characteristic, and therefore can be easily converted.
In the state model of model (1), for example, the graph shown in FIG. 3A or information corresponding to the graph is shown as the designation criterion.

Next, the model (2) shown in FIG. 3B shows a model that continuously changes in a non-linear manner and that can grasp the tendency of near time but cannot show a fixed time characteristic.
This includes information such as temperature, humidity, and motor speed.
In the state model of model (2), for example, the following calculation formula is shown as the designation criterion.
In the case of model (2), a preceding measurement condition is generated based on linear prediction.
That is, the characteristic gradient a is obtained from the periodic operation command information from the operation command device 3 and the current measurement value y1 and the trigger condition value y2 are in the following relationship as the preceding measurement condition.
a> 0: y1 + a * t ≧ y2
a <0: y1 + a * t ≦ y2 (t = preceding time for trigger condition)

The model (3) shown in FIG. 3 (c) is one that changes discontinuously, and shows itself that changes suddenly.
This is the switching operation.
In the state model of model (3), the following related information is shown as a designation criterion.
In the case of model (3), since the preceding measurement condition cannot be acquired from the item itself, related information is used.
For example, if the operation switching is performed when the motor rotation reaches a certain range in the operation regulation, the preceding measurement condition is generated based on the motor rotation speed.
The method for deriving the related information of the model (3) may be obtained from the relevance analysis of past information as well as from the specifications and discipline as described above.

The model type and the generation method of the preceding measurement condition for each item of the above trigger conditions are componentized as the state model 202, and the preceding measurement condition generation unit 102 receives the trigger condition given from the trigger condition setting unit 101. The item for each item is extracted, the model for each item is extracted, and the trigger condition value included in the trigger condition is substituted into the conversion formula to the preceding measurement condition to derive the preceding measurement condition for each item.
Thereafter, the preceding measurement condition generation unit 102 returns the preceding measurement condition for each item to the logical expression of the trigger condition, and generates a set of preceding measurement conditions in which the preceding measurement conditions for each item are combined.
Then, the preceding measurement condition generation unit 102 stores the generated preceding measurement condition in the collection trigger condition storage unit 104, and at this time, stores the generated preceding measurement condition in association with the original trigger condition.
The pair of trigger conditions and the preceding measurement conditions that are associated with each other are referred to as collection trigger conditions.
Further, the collection trigger condition (trigger condition and preceding measurement condition) is given to the information management unit 105.

The information management unit 105 performs measurement and collection determination according to the flowchart shown in FIG.
That is, the information management unit 105 reads out the collection trigger condition (a set of trigger conditions and a set of preceding measurement conditions) from the collection trigger condition storage unit 104 (condition definition information read step) and transmits the transmission path 4 via the communication unit 106. The operation command information 203 is extracted from the monitor, and the extracted operation command information 203 is compared with a set of preceding measurement conditions to determine whether or not all the preceding measurement conditions are satisfied (S401).
When the operation command information 203 matches all the preceding measurement conditions and the preceding measurement conditions are satisfied (YES in S401), a measurement instruction is issued to the control device 2 to start buffering of the sensor value 22 and to transmit it. Preparation for output to the path 4 is performed (S402) (buffering start instruction step).
Since an information network such as Ethernet (registered trademark) is generally used for the transmission path 4, the sensor value 22 is formed as packet data.
Further, the information management unit 105 continues to monitor the operation command information 203, and then compares the operation command information 203 with a set of trigger conditions (S403).
Here, when the operation command information 203 matches all the trigger conditions and the trigger conditions are satisfied (YES in S403), the information management unit 105 issues a collection instruction to the control device 2 to the control device 2. Output the generated packet data to the transmission line 4 (data transmission instruction step), receive the packet data, store the sensor value in the packet data in the storage 12 (S404), and receive all the packet data from the control device 2 When the process is completed, the information management unit 105 ends the collection process (S405) and returns to the state of S401.
On the other hand, when the trigger condition is not satisfied, the information management unit 105 analyzes the operation command information 203 and determines whether or not there is a tendency to deviate from the trigger condition (S406).
For example, if the value is decreasing for the item classified as the model (2), there is a high possibility that the trigger condition cannot be achieved. Therefore, the information management unit 105 performs buffering in the control device 2, for example. Stop, discard the buffered sensor value, and return to the state of S401.

As described above, the data collection apparatus according to the present embodiment generates the preceding measurement condition based on the trigger condition set based on the user's instruction.
Thereby, accumulation of data is started in the control device from the time when the preceding measurement condition is satisfied, and the data accumulated in the control device is output when the trigger condition is satisfied.
For this reason, it is not necessary to always send the collected information to the transmission path, and the transmission load is reduced.

In addition, because the information for the period that needs to be collected on the control device side is converted into packet data according to the measurement instruction, large data can be transmitted even by means of transmission with low transmission capacity, for example, by dividing the information according to the transmission load and transmitting the information. .
As a result, high accuracy and high sampling information can be transmitted on the existing transmission means.
Also, in the generation of the preceding measurement conditions, a model and a conversion formula are defined for each item, and these are handled as parts. Therefore, even if the trigger condition becomes a complicated expression, the preceding measurement conditions can be generated by arithmetic processing. it can.
In this embodiment, the number of control devices is not mentioned, but a plurality of control devices can be managed by one data collection device.
This can be realized by specifying the target device when setting the trigger condition.
In addition, by grouping target devices, it is possible to simultaneously give measurement and collection instructions to the control devices of the same group.
2 has been described as the operation in the data collection device, the processing of the trigger condition setting unit 101 and the preceding measurement condition generation unit 102 may be performed by an external device outside the data collection device.
By performing these at a remote location and transmitting the generated collection trigger condition to the data collection device via the transmission path 4, remote collection from a remote location becomes possible.

As described above, in the present embodiment,
A data collection device that is installed on the network and acquires measurement information from a control device connected to the network using the operation command information on the network as a trigger. Define and monitor the preceding measurement conditions for the trigger conditions. A data collection device that starts measurement collection when the operation command information to be met matches the preceding measurement conditions has been described.

  Further, it has been described that the preceding measurement condition is generated from the trigger condition.

  In addition, as a method for generating the preceding measurement conditions, a state change model is defined in advance for each of the plurality of operation command information items prepared as trigger candidates, and information and values that become the preceding measurement conditions are set according to the selected contents of the trigger conditions. It has been explained that the preceding measurement condition is generated by obtaining.

Also, the state change model
(1) The direction of travel is one-sided and linearly changes like time,
(2) Non-linear but continuous such as temperature,
(3) Explained that it is defined as something that changes suddenly or discontinuously like operation switching.

  In the state model (1) described above, since the information value before a certain time can be determined, this has been described as the preceding measurement condition.

  In the state model (2), the characteristic inclination of the information is monitored, and it has been described that the preceding measurement condition is a time when a value obtained by adding a certain time to the inclination angle reaches the trigger condition.

  In addition, it has been described that the state model (3) is a combination of other information conditions related to the state model (1) or the state model (2).

  Moreover, about the above-mentioned state model (3), extracting the other relevant information by collecting and analyzing the change of each driving | operation command information at the time of driving | operation was demonstrated.

Finally, a hardware configuration example of the data collection device 1 shown in the present embodiment will be described.
FIG. 6 is a diagram illustrating an example of hardware resources of the data collection device 1 illustrated in the present embodiment.
6 is merely an example of the hardware configuration of the data collection device 1, and the hardware configuration of the data collection device 1 is not limited to the configuration illustrated in FIG. Also good.

In FIG. 6, the data collection device 1 includes a CPU 911 (also referred to as a central processing unit, a central processing unit, a processing unit, an arithmetic unit, a microprocessor, a microcomputer, and a processor) that executes a program.
The CPU 911 is connected to, for example, a ROM (Read Only Memory) 913, a RAM (Random Access Memory) 914, a communication board 915, a display device 901, a keyboard 902, a mouse 903, and a magnetic disk device 920 via a bus 912. Control hardware devices.
Further, the CPU 911 may be connected to an FDD 904 (Flexible Disk Drive), a compact disk device 905 (CDD), a printer device 906, and a scanner device 907. Further, instead of the magnetic disk device 920, a storage device such as an SSD (Solid State Drive), an optical disk device, or a memory card (registered trademark) read / write device may be used.
The RAM 914 is an example of a volatile memory. The storage media of the ROM 913, the FDD 904, the CDD 905, and the magnetic disk device 920 are an example of a nonvolatile memory. These are examples of the storage device.
The state model storage unit 103, the collection trigger condition storage unit 104, and the storage 12 described in the present embodiment are realized by the RAM 914, the magnetic disk device 920, and the like.
A communication board 915, a keyboard 902, a mouse 903, a scanner device 907, an FDD 904, and the like are examples of input devices.
The communication board 915, the display device 901, the printer device 906, and the like are examples of output devices.

The communication board 915 is connected to the transmission line 4 as shown in FIG.
For example, the communication board 915 may be connected to the Internet, a WAN (wide area network), a SAN (storage area network), etc. in addition to a LAN (local area network).

The magnetic disk device 920 stores an operating system 921 (OS), a window system 922, a program group 923, and a file group 924.
The programs in the program group 923 are executed by the CPU 911 using the operating system 921 and the window system 922.

The RAM 914 temporarily stores at least part of the operating system 921 program and application programs to be executed by the CPU 911.
The RAM 914 stores various data necessary for processing by the CPU 911.

The ROM 913 stores a BIOS (Basic Input Output System) program, and the magnetic disk device 920 stores a boot program.
When the data collection device 1 is activated, the BIOS program in the ROM 913 and the boot program in the magnetic disk device 920 are executed, and the operating system 921 is activated by the BIOS program and the boot program.

  The program group 923 executes the functions described as “to part” (except for “state model storage unit 103” and “collection trigger condition storage unit 104”) in the description of the present embodiment. The program is stored. The program is read and executed by the CPU 911.

In the description of the present embodiment, in the file group 924, “determination of”, “calculation of”, “comparison of”, “evaluation of”, “update of”, “setting of”, Information, data, signal values, variable values, and parameters that indicate the results of the processes described as “Registering”, “Selecting”, “Input of”, “Output of”, etc. And “˜database”.
The “˜file” and “˜database” are stored in a recording medium such as a disk or a memory.
Information, data, signal values, variable values, and parameters stored in a storage medium such as a disk or memory are read out to the main memory or cache memory by the CPU 911 via a read / write circuit.
The read information, data, signal value, variable value, and parameter are used for CPU operations such as extraction, search, reference, comparison, calculation, calculation, processing, editing, output, printing, and display.
Information, data, signal values, variable values, and parameters are stored in the main memory, registers, cache memory, and buffers during the CPU operations of extraction, search, reference, comparison, calculation, processing, editing, output, printing, and display. It is temporarily stored in a memory or the like.
In addition, the arrows in the flowchart described in this embodiment mainly indicate input / output of data and signals.
Data and signal values are recorded on a recording medium such as a memory of the RAM 914, a flexible disk of the FDD 904, a compact disk of the CDD 905, a magnetic disk of the magnetic disk device 920, other optical disks, a mini disk, and a DVD.
Data and signals are transmitted online via a bus 912, signal lines, cables, or other transmission media.

In addition, what is described as “˜unit” in the description of the present embodiment may be “˜circuit”, “˜device”, “˜device”, and “˜step”, “˜”. “Procedure” and “˜Process” may be used.
That is, the operation of the data collection device according to the present embodiment can be grasped as a data collection method by the steps, procedures, and processes shown in the flowchart described in the present embodiment.
Further, what is described as “˜unit” may be realized by firmware stored in the ROM 913.
Alternatively, it may be implemented only by software, or only by hardware such as elements, devices, substrates, and wirings, by a combination of software and hardware, or by a combination of firmware.
Firmware and software are stored as programs in a recording medium such as a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, and a DVD.
The program is read by the CPU 911 and executed by the CPU 911.
In other words, the program causes the computer to function as “to part” of the present embodiment. Alternatively, the procedure or method of “˜unit” in the present embodiment is executed by a computer.

As described above, the data collection device 1 shown in the present embodiment includes a CPU as a processing device, a memory as a storage device, a magnetic disk, etc., a keyboard as an input device, a mouse, a communication board, etc., a display device as an output device, a communication board, etc. It is a computer provided with.
Then, as described above, the functions indicated as “˜units” are realized using these processing devices, storage devices, input devices, and output devices.

  DESCRIPTION OF SYMBOLS 1 Data collection device, 2 Control apparatus, 3 Operation instruction device, 4 Transmission path, 12 Storage, 21 Motor, 101 Trigger condition setting part, 102 Prior measurement condition production | generation part, 103 State model memory | storage part, 104 Collection trigger condition memory | storage part, 105 Information management unit, 106 Communication unit.

Claims (8)

A data collection device for receiving acquired data acquired by the data acquisition device from a data acquisition device for acquiring data,
A communication unit communicating with the data acquisition device;
A condition definition information storage unit that stores condition definition information that defines a condition for transmitting acquisition data from the data acquisition device as a trigger condition;
A buffering start instruction unit that transmits a buffering start instruction from the communication unit to the data acquisition device to instruct the data acquisition device to start buffering of acquisition data before a situation where a trigger condition is satisfied occurs. When,
A data transmission instruction for transmitting a data transmission instruction from the communication unit to the data acquisition apparatus to transmit the buffered acquisition data when a situation where a trigger condition is satisfied occurs. And a data collection device. The condition definition information storage unit
Storing condition definition information defining a condition for starting buffering of acquired data in the data acquisition device as a buffering start condition;
The buffering start instruction unit
The data collection device according to claim 1, wherein a buffering start instruction is transmitted from the communication unit to the data acquisition device when a situation in which a buffering start condition is satisfied occurs. The data collection device further includes:
A trigger condition input section for inputting a trigger condition;
A buffering start condition designating unit for designating a state at a previous stage when the trigger condition input by the trigger condition input unit is established as a buffering start condition;
The condition definition information storage unit
The condition definition information for defining a buffering start condition designated by the buffering start condition designating unit and storing a trigger condition input by the trigger condition input unit is stored. Data collection device. The data collection device further includes:
Having a plurality of trigger condition categories, and having a reference information storage unit for storing reference information indicating a specification criterion used as a reference when specifying a buffering start condition for each category,
The buffering start condition specifying unit
A buffering start condition for the trigger condition is designated based on a designation criterion in a category to which the trigger condition input by the trigger condition input unit belongs and a trigger condition input by the trigger condition input unit. The data collection device according to claim 3. The reference information storage unit
As the trigger condition category, at least the trigger condition category that targets events that change continuously and linearly with time, and the trigger condition category that targets events that change continuously with time but nonlinearly 5. The data collection device according to claim 4, wherein reference information that stores a trigger condition category for an event that changes discontinuously with respect to time is stored. The trigger condition input unit
Enter two or more trigger conditions in association with each other,
The buffering start condition specifying unit
Generating two or more buffering start conditions in association with two or more trigger conditions input by the trigger condition input unit;
The condition definition information storage unit
Two or more trigger conditions input in association with the trigger condition input unit are defined in association with each other, and two or more buffering start conditions generated in association with the buffering start condition specifying unit are in correspondence Memorize the condition definition information to be defined,
The buffering start instruction unit
When a situation occurs in which all of the two or more buffering start conditions defined in association with each other in the condition definition information are satisfied, a buffering start instruction is transmitted from the communication unit to the data acquisition device. ,
The data transmission instruction unit includes:
A data transmission instruction is transmitted from the communication unit to the data acquisition device when a situation in which all of two or more trigger conditions defined in association with each other in the condition definition information are satisfied occurs. The data collection device according to claim 3. The data acquisition device includes:
Receiving a control instruction for the target device from a management device that manages a predetermined target device, controlling the target device based on the received control instruction, obtaining data output from the target device;
The communication unit is
Receiving a copy of the control instruction transmitted from the management device to the data acquisition device;
The buffering start instruction unit
Analyzing the contents of the copy of the control instruction received by the communication unit to determine whether or not the buffering start condition is satisfied,
The data transmission instruction unit includes:
The data collection according to any one of claims 2 to 6, wherein a content of a copy of the control instruction received by the communication unit is analyzed to determine whether or not a trigger condition is satisfied. apparatus. From a data acquisition device that acquires data, to a computer that receives the acquisition data acquired by the data acquisition device,
A communication step of communicating with the data acquisition device;
A condition definition information reading step for reading out condition definition information defining a condition for transmitting acquisition data from the data acquisition device as a trigger condition from a predetermined storage area; and
A buffering start instruction step for transmitting a buffering start instruction for instructing the data acquisition apparatus to start buffering of acquisition data to the data acquisition apparatus through the communication step before a situation where a trigger condition is satisfied occurs. When,
A data transmission instruction for transmitting a data transmission instruction to the data acquisition apparatus to transmit the buffered acquisition data to the data acquisition apparatus through the communication step when a trigger condition is satisfied A program that executes steps.

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