JP2008134690A - Telemeter device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a telemeter device that makes it possible to review collected data and a status of communication at the same time by preventing recorded data from becoming defective in the event of a communication failure, and performing processes for monitoring based on multiplex communication and for data recovery at the same time. <P>SOLUTION: The telemeter device comprises a monitoring device 200 which is connected via a communication line 300 to a monitoring terminal 400 having the function of collecting and recording data on a machine field, and which has a communication function for receiving data in the monitoring terminal 400 and a function for detecting any communication failure. The telemeter device has a means for requesting, if the monitoring device 200 detects a communication failure, the monitoring terminal 400 to send data that should be obtained during the communication failure after recovery from the communication failure, and for correcting the part of the communication failure in the data in the monitoring device 200 by means of the newly obtained data. A data value recorded during the communication failure is a numerical value obtained immediately before the communication failure, and data recorded in the monitoring terminal 400 is obtained after recovery from the communication failure so as to correct the data in the monitoring device 200. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a telemeter device, and more particularly, to a technology for remotely monitoring and controlling water supply and sewage water supply / distribution equipment, industrial production equipment, sales data collection equipment, etc., using a monitoring system, telemeter equipment and computer software. .

  Conventionally, a system is known in which a monitoring device communicates with a monitoring terminal, collects instantaneous data of the monitoring terminal, and monitors equipment. There exists patent document 1 in the example of the conventional monitoring system.

  In many cases, the conventional monitoring system described above always uses a continuous communication line, and the monitoring device continuously collects instantaneous data of the monitoring terminal through continuous communication. Conventionally, such a monitoring system uses a highly reliable analog dedicated line. However, in recent years, cheaper and faster communication using the Internet has been increasing. However, since the use of these communication lines is less reliable than the analog dedicated line, the collected data may be lost due to a communication abnormality.

Further, even with a conventional analog leased line, a communication abnormality sometimes occurred. Conventionally, during the occurrence of a communication abnormality, the collected data during the communication abnormality is assumed to have not changed from the last acquired instantaneous data, and data is collected while holding the numerical value immediately before the communication abnormality. Hereinafter, this technique is referred to as “previous value retention”.
JP 2001-188980 A

The above conventional problems are summarized as follows.
(1) It is expected that data loss frequently occurs due to communication abnormality.
Since Internet lines are less reliable than conventional analog leased lines, communication abnormalities frequently occur. Since monitoring data cannot be acquired while communication is abnormal, there is a possibility that recorded data may be lost.
(2) Data cannot be acquired while communication is abnormal.
The monitoring device always communicates to acquire and count instantaneous data of the monitoring terminal. Therefore, data cannot be obtained because instantaneous data cannot be transmitted / received during communication abnormality.
(3) The recorded data during communication abnormality is different from the actual data at the machine.
In the conventional system, since the previous value is held, the data measured immediately before the communication abnormality is recorded as it is during the communication abnormality. Therefore, the data stored during the communication abnormality is different from that actually measured at the machine.
(4) The data aggregated when communication is abnormal cannot be distinguished from the data aggregated when normal.
In the conventional system, the previous value is held during communication abnormality, so there is no difference in data between the data at the time of communication abnormality and the data at the time of normality. Is the data acquired by normal communication? I couldn't distinguish.

  The present invention relates to a monitoring device having a communication function of receiving data in the monitoring terminal connected to a monitoring terminal having a function of collecting and recording data on the machine ground via a communication line, and a function of detecting a communication abnormality. When the monitoring device detects a communication error, it requests the monitoring terminal to transmit data to be acquired during the communication error after the communication error is recovered, and uses the newly acquired data from the monitoring terminal. And a telemeter device comprising means for correcting the location of the data accumulated in the monitoring device at the time of communication abnormality.

  Further, the present invention sets the value of data recorded during a communication abnormality as a numerical value acquired immediately before the communication abnormality, acquires the data recorded in the monitoring terminal after recovery from the communication abnormality, and corrects the data in the monitoring device Telemeter device.

  And when this invention corrects the data in the said monitoring apparatus, it has a function which determines whether it is the data which the monitoring terminal collected with respect to the data newly acquired from the said monitoring terminal, This is a telemeter device that corrects data when the data is correct.

  Further, according to the present invention, the monitoring device has a function of distributing time data of an internal clock, and the monitoring device distributes time data to a monitoring terminal having a function of adjusting the internal clock to the time data to be distributed. And the telemetry device which can synchronize the time of the said monitoring device and the said monitoring terminal by the said monitoring terminal synchronizing an internal clock with the time data which the said monitoring device delivers.

According to the present invention, the following can be achieved.
(1) Prevention of loss of recorded data at the time of communication abnormality When using an Internet line that does not guarantee that communication is always established according to the present invention, even if a communication abnormality occurs temporarily, no loss is monitored. Data can be created.
(2) Collected data and communication status can be displayed together It is possible to display which part of the data has been recovered, and it can be confirmed because there is a difference between the data immediately after aggregation and the data after recovery.
(3) Simultaneous processing of monitoring and data recovery by multiplex communication Since it is possible to perform multiplex communication using the Internet, etc., and perform communication to acquire recovery data at the same time as monitoring data, operation is not interrupted for recovery You can monitor.
(4) Collected data and communication status can be browsed simultaneously The present invention is upwardly compatible with the previous value retention technique, and can provide functional upgrade as it is to a conventional telemeter system. For this reason, in the case where the terminal side has failed and exchanged instead of a communication abnormality, data consistency can be maintained by holding the immediately preceding numerical value.

The best mode for carrying out the present invention will be described.
An embodiment of the telemeter device of the present invention will be described with reference to the drawings.

  Examples will be described. FIG. 1 shows the configuration of the entire monitoring system using the telemeter device of this embodiment. The monitoring device 200 installed in the monitoring room communicates with the monitoring terminals 400 and 401 via the communication line 300 to monitor the operation state of the monitoring target equipment. There are three basic functions in this monitoring system using the communication line 300. First, the monitoring device 200 acquires real-time data of equipment to be monitored and displays it on the data display personal computer 100. Second, if there is a failure in the equipment to be monitored, an alarm mail is sent to the monitoring device 200 to notify the equipment manager of the failure. Third, the monitoring device 200 stores data collected by the monitoring terminals 400 and 401.

  FIG. 2 shows an example of the contents of time synchronization of the telemeter device of the embodiment. Since the monitoring device 200 records the acquired data for each time, the time data of the monitoring device 200 and the monitoring terminals 400 and 401 are synchronized so that the data is accurately stored. Since the monitoring device 200 has a function of transmitting the time data of its own internal clock to other devices, the monitoring terminals 400 and 401 periodically receive the time data from the monitoring device 200 and set the time of its own internal clock. The same time as the monitoring device 200 is set.

  FIG. 3 shows an example of a communication flow between the monitoring device and the monitoring terminal in the embodiment. The monitoring device 200 transmits a command for requesting data transmission to the monitoring terminal 400 (S100). The monitoring apparatus 200 determines whether the response has been successfully received (S101). If the monitoring apparatus 200 is successfully received, the monitoring apparatus 200 records the received data and a counter value for detecting a communication abnormality in a data writing area existing in its own memory (S102). As the counter value, a numerical value incremented every time data is transmitted is transmitted from the monitoring terminal 400. If reception of the response fails, neither the data area value nor the counter value changes (S103). The monitoring apparatus 200 determines whether the counter value has changed for a certain time (S104). If not changed, the monitoring apparatus 200 determines that the communication is abnormal and sets the communication abnormality flag to ON (S105). The monitoring device 200 stores the data area value in the recording area (S106). At the time of data recording, the communication state is saved and the communication abnormal flag ON or OFF is recorded (S107). The monitoring apparatus 200 ends data reception (S108). In this way, communication between the monitoring device 200 and the monitoring terminal is performed.

  4 to 6 show an example of the contents of the data format in the embodiment. 4 and 5 are examples of data formats when the collected data 501 and the communication state data 502 are collected every hour. The display data 503 in FIG. 6 is data that is actually shaped so that the user can browse the data. Display data 503 is created from the collected data 501 and communication status data 502, and the user views the display data 503. The collected data 501 of the monitoring terminal is tabulated with the operation data of each device and the measurement results of the measuring device for each time. For items for which data has not yet been entered, a numerical value of “−999999” that cannot be obtained by a normal monitoring device is recorded. The communication status data -502 is the same item as the collected data 501 and is in the form of a table for each time and device, but the status of the data is stored instead of the data to be monitored. Since the collected data 501 and the communication state 502 have the same items at the time of recording, comparing the two shows the status of each data. Utilizing this fact, the display data 503 displays the status of the data by coloring the columns of the table. The format of the correction data created by the monitoring terminals 400 and 401 is the same as the format of the collected data 501 in order to simplify the correction process.

  FIG. 7 shows an example of a data recovery flow in the embodiment. When the communication recovery is confirmed (S200), the monitoring device 200 requests the monitoring terminal 400 to transmit data for data recovery (S201). The monitoring device 200 refers to the communication status data 502 to determine the time zone where the communication abnormality has occurred and its monitoring terminal, and issues a recovery data transmission command. When the monitoring device 200 receives the recovery data in a daily file (S202), the monitoring device 200 cuts out data at a location to be recovered (S203). If the cause of the communication abnormality is due not only to the abnormality of the communication equipment but also to the abnormality of the entire site, data cannot be accumulated in the monitoring terminal 400 at the site. Therefore, when the correction data is not input, the recovery process must be stopped and the correction data must be discarded. It is determined whether the data is “−999999” (S204). As described above, since the format of the correction data is the same as that of the collected data 501, the data is “−99999999” when the correction data is not input, and therefore the data is not “−999999”. Recovery processing is performed (S200). If the data is not “−999999”, the acquired data is discarded (S206). The process ends (S207). In this way, the recovery process in the monitoring device 200 is performed.

  As described above, in this embodiment, data recovery during communication abnormality can be achieved. In addition, the data on the machine is stored in the monitoring terminal installed in the machine, and if a communication error occurs, the data stored in the monitoring terminal is sucked up to the monitoring device after communication is restored, Correct using the data that was extracted. In detecting a communication error, a communication error can be detected when the monitoring device fails to download data from the monitoring terminal for a time specified by the user or longer.

  Then, in addition to the collected data, data indicating whether or not the data is stored in a normal communication state is also created. When performing data recovery, the communication state data is referred to and it is determined whether or not the communication is abnormal. In addition, when data recovery is performed, it is possible to record that the recovery has been performed on the data in the communication state.

  In addition, there are communication errors with the machine ground when there is an abnormality only in communication equipment such as communication equipment and communication lines, and when there is a power outage, all equipment including communication equipment that exists in the machine ground. There is a case to stop. In the latter case, since the monitoring terminal cannot collect data, the monitoring device determines whether or not the recovery data is normal data, and if it is determined to be normal data Only data recovery can be done.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. Explanatory drawing of an example of the content of the time synchronization in an Example. Explanatory drawing of an example of the flow of the data collection in an Example. Explanatory drawing of an example of the format of the collection data in an Example. Explanatory drawing of an example of the format of the communication status data in an Example. Explanatory drawing of an example of the format of the data for a display in an Example. Explanatory drawing of an example of the flow of the data recovery in an Example.

Explanation of symbols

100 PC for data display 200 monitoring device 300 network 400 monitoring terminal

Claims (4)

A telemeter device comprising a monitoring device connected to a monitoring terminal having a function of collecting and recording machine data via a communication line and receiving data in the monitoring terminal and a function of detecting a communication abnormality Because
When the monitoring device detects a communication error, the monitoring terminal is requested to transmit data to be acquired during the communication error after the communication error is recovered, and the data newly acquired from the monitoring terminal is stored in the monitoring device. A telemeter device comprising means for correcting a location when data communication is abnormal. The telemeter device according to claim 1, wherein
A telemeter that sets the value of data to be recorded during a communication abnormality as a numerical value acquired immediately before the communication abnormality, acquires the data recorded in the monitoring terminal after recovery from the communication abnormality, and corrects the data in the monitoring device apparatus. The telemeter device according to claim 1, wherein
When correcting data in the monitoring device, it has a function of determining whether the data newly acquired from the monitoring terminal is data collected by the monitoring terminal. A telemeter device characterized by performing correction. The telemeter device according to claim 1, wherein
The monitoring device has a function of distributing time data of an internal clock, and the monitoring device distributes time data to a monitoring terminal having a function of adjusting the internal clock to the time data to be distributed. A telemeter device capable of synchronizing the time of the monitoring device and the monitoring terminal by synchronizing the internal clock with the time data to be distributed.

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