JP2001021658A - Data logger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make collectable measurement data on-line by providing a data logger with a communication function. SOLUTION: The data logger 1 is a portable recording device being accommodated in an enclosure approximately in B5 size, is connected to n detectors 20 for detecting a vibration value via n cables 40, is always installed on the spot along with the detectors 20, and records measurement data regarding vibration (earthquake) by converting an electrical signal (analog signal) regarding the vibration value being transmitted from the detectors 20 constantly to measurement data (digital signal). Also, the data logger 1 records data for a specific amount of time and then transmits measurement data being recorded in a record medium 8 to a monitoring center 60 via a communication line 70 on-line.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data logger which records measurement data of earthquake-related vibrations and transmits the measurement data to the outside by a network function.

[0002]

2. Description of the Related Art Data loggers related to seismic measurement are already available.
Completed and commercially available for offline use. This conventional data logger will be described with reference to the drawings.

FIG. 3 is a diagram showing a state of transmission of measurement data relating to vibration using a conventional data logger 100. In FIG. 3, at the site, a detector 20 that detects an earthquake, that is, a vibration and outputs an electric signal (analog signal),
A data logger 100 that converts an analog signal into a digital signal and records it as measurement data is connected via a cable 40 and is permanently installed on site. Detector 2
0 is installed, for example, several tens to several hundred meters underground,
An analog signal as a measurement result is constantly transmitted to the data logger 100. On the other hand, the data logger 100 records the measurement data by converting the transmitted analog signal into measurement data (digital signal) representing a vibration value by a numerical value.

FIG. 4 is a view showing an example of measurement data of one detector recorded in the data logger 100.
It is an example of the measurement data in the case where the recording was started at 12:01:01 on January 1, 1999 and the sampling cycle was 100 Hz.

In FIG. 4, since the sampling period of the measurement data is 100 Hz, 100 data are recorded in one second in association with date data and time data. Further, assuming that the capacity of the measurement data is 8 bytes for date data, 6 bytes for time data, and 8 bytes for one measurement data, 8 bytes + 6 bytes + 8 bytes × 100 = 814 bytes / sec per second. The minimum capacity of seconds (1) is required, and in one hour, the capacity of 814 bytes × 60 seconds × 60 minutes = 2930400 bytes / hour (2) is required. In general, a plurality of detectors are connected to one data logger 100. In this case, a storage medium having a capacity corresponding to the number of detectors is required.

Next, collection of recorded measurement data will be described. After the occurrence of the earthquake or during a periodic inspection, the researcher goes to the site, connects the personal computer 30 and the data logger 100 brought by the cable 50, and takes the measurement data recorded in the data logger 100 into the personal computer 30. . Then, the researcher connects the personal computer 30 to a communication line 70 such as a telephone line so as to transmit the measurement data taken into the personal computer 30 to the monitoring center 60, and transmits the measurement data to the monitoring center 60.

As described above, the conventional data logger 100
Is permanently installed on site, and the seismic measurement data is continuously recorded. Then, when the investigator goes to the site separately, the measurement data is transmitted to the monitoring center 6 via the personal computer 30.
0 had been sent.

[0008]

However, the online data transmission / reception to / from the monitoring center 60 can only be performed between the personal computer 30 and the monitoring center 60 after the researcher has arrived. Since the device 20 and the data logger 100 and the data logger 100 and the personal computer 30 are offline, measurement data could not be transmitted and received at any time. Therefore, under the present circumstances, it is necessary for the investigator to go to the site to collect the measurement data and transmit it separately to the monitoring center 60, so that the work of collecting the measurement data has taken a great deal of cost and time.

Although a personal computer 30 can be permanently installed on-site to enable online data transmission and reception, power supply problems, increased costs and maintenance costs due to an increase in the number of devices, and a reduction in the failure rate of the entire system. It is difficult to construct such a system because problems such as rising occur.

It is an object of the present invention to provide a data logger having a communication function, and to enable online measurement data collection.

[0011]

According to a first aspect of the present invention, there is provided a data logger for storing predetermined measurement data relating to vibration (for example, the storage unit and the storage unit in FIG. 1).
Determining means (for example, CP in FIG. 1) for determining whether or not measurement data for a predetermined time is stored by the storage means.
U2) and transmitting the measurement data for the predetermined time by connecting to a predetermined communication line when the determination means determines that the measurement data for the predetermined time is stored in the storage means. Means (for example, communication unit 9 in FIG. 1)
And, it is characterized by having.

According to the first aspect of the invention, the storage means stores predetermined measurement data relating to the vibration, and the determination means determines whether or not the storage data has been stored for a predetermined time. When the determination unit determines that the measurement data for the predetermined time is stored in the storage unit, the transmission unit connects to a predetermined communication line and transmits the measurement data for the predetermined time. Send.

Therefore, for example, it is possible to collect measurement data every hour or every other day, and to periodically and remotely grasp the vibration situation at the site where the data logger is installed. be able to. In addition, it is possible to reduce the conventional work of collecting measurement data offline and the enormous cost of the collection work. Further, since data can be transmitted online without the need for permanent installation of a personal computer or the like at the site, the cost of the entire system can be reduced and maintenance can be facilitated.

According to a second aspect of the present invention, there is provided a data logger for storing predetermined measurement data relating to vibration (for example, the storage unit 7 and the storage unit 8 in FIG. 1) and the measurement stored by the storage unit. Determining means (for example, CPU2 in FIG. 1) for determining whether or not the data has reached a predetermined capacity;
When the determination unit determines that the measurement data stored in the storage unit has reached a predetermined capacity, the transmission unit connects to a predetermined communication line and transmits the measurement data of the predetermined capacity (for example, And a communication unit 9) shown in FIG.

According to the second aspect of the present invention, the storage means stores the predetermined measurement data relating to the vibration, and the determination means determines whether the measurement data stored by the storage means has reached a predetermined capacity. When the determination means determines that the measurement data stored in the storage means has reached a predetermined capacity, the transmission means connects to a predetermined communication line to measure the predetermined capacity. Send data.

Therefore, for example, by transmitting the measurement data immediately before the storage capacity of the storage means becomes full, the maintenance work accompanying the limitation of the storage capacity can be omitted, and the maintainability of the data logger is improved. Can be. In addition, it is possible to reduce the conventional work of collecting measurement data offline and the enormous cost of the collection work. Furthermore, even if you do not have a permanent PC at the site,
Since data can be transmitted online, the cost of the entire system can be reduced and maintenance can be facilitated.

According to a third aspect of the present invention, in the data logger according to the first or second aspect, predetermined measurement is performed by A / D converting vibration detection signals input from a plurality of vibration detectors. A conversion unit (for example, A / D converter 12 in FIG. 1) for converting the data into data is further provided, and the measurement data converted by the conversion unit is stored in the storage unit in association with a corresponding vibration detector. It may be that.

According to the third aspect of the invention, since the measurement data corresponding to each vibration detector is stored and transmitted in association with each other, the same usage method as that of the conventional data logger can be achieved.
That is, the present invention can be applied to a case where a plurality of vibration detectors are connected to a data logger.

Further, like the invention according to claim 4, the data logger according to any one of claims 1 to 3 may be housed in a portable case.

According to the fourth aspect of the present invention, the data logger is housed in a portable case, so that the data logger can be easily transported and exchanged, and has a small installation area. Regardless of the data logger, the application range of the data logger can be expanded.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 and 2,
An embodiment of the data logger 1 to which the present invention is applied will be described in detail.

First, the configuration will be described. FIG. 1 is a block diagram showing an internal configuration of a data logger 1 to which the present invention is applied. In the following description, the same parts as those of the same device such as the detector shown in FIG.

The data logger 1 is a portable recording device housed in a casing of about B5 size, and includes n (n is an integer) detectors 20 for detecting vibration values and n cables 40. Are connected to the detector 20 and are permanently installed at the site together with the detector 20. By converting an electric signal (analog signal) related to the vibration value transmitted from the detector 20 to measurement data (digital signal), vibration (earthquake) ) Is recorded. After recording for a predetermined time, the data logger 1 transmits the measurement data recorded in the storage medium 8 to the monitoring center 60 via the communication line 70 online.

In FIG. 1, a data logger 1 has a CPU
2, input unit 3, display unit 4, ROM 5, RAM 6
, A storage unit 7, a storage medium 8, a communication unit 9, an amplifier module 11, and an A / D converter 12.

CPU (Central Processing Unit) 2
Is the IPL (Initial Program) stored in the ROM 5.
m Loader) program and a recording processing program stored in the storage medium 8 and the like, and the processing results are stored in a RAM.
6 and is displayed on the display unit 4.

The CPU 2 performs A / A as a recording process.
The measurement data (digital signal) input from the D converter 12 is recorded on the storage medium 8, and after recording for a predetermined time, the communication processing program is read out from the storage medium 8 to execute the communication processing, thereby storing the data. The measurement data recorded on the medium 8 is transmitted to the monitoring center 60 via the communication unit 9 and the communication line 70.

The input unit 3 includes input keys for inputting a date and time, setting keys for setting various functions, and the like, and outputs a key press signal to the CPU 2.
The display unit 4 is configured by an LCD (Liquid Crystal Display) or the like, and displays the operating state of the data logger 1 and the current time input from the CPU 2.

A ROM (Read Only Memory) 5 is a CPU
2 executed when the data logger 1 is started
In addition to the programs, intended setting values of various processing programs are stored.

A RAM (Random Access Memory) 6 stores a buffer area for temporarily storing measurement data constantly input from the detector 20 via the amplifier module 11 and the like, and stores various data relating to various processing such as communication processing. A work memory area for storing is formed.

The storage unit 7 has a storage medium 8 for storing a communication processing program and measurement data, and this storage medium 8 is constituted by a magnetic or optical storage medium or a semiconductor memory. The storage medium 8 is fixedly provided in the storage unit 7 or is detachably mounted. Also, the measurement data recorded in the storage unit 7 is the same as the data shown in FIG.

The communication section 9 is constituted by a modem or the like having a modular jack for connecting to a communication line 70 which is a wireless or wired telephone line.
In the communication processing executed by the control unit 70, the measurement data recorded in the storage medium 8 is transmitted to the monitoring center 60 via the communication line 70. Note that the communication processing program related to this communication processing is, for example, PPP (Point to Point) if data transmission between the data logger 1 and the monitoring center 60 can be realized.
It may be a general communication processing program for performing a Point Protocol) connection or a special communication processing program for transmitting measurement data.

The amplifier module 11 is an amplifier that amplifies an electric signal that is an analog signal constantly transmitted from the detector 20, and the A / D converter 12 converts the amplified electric signal (analog signal) into a vibration value. Is converted into measurement data, which is a digital signal represented by a numerical value, and is output to the CPU 2.
/ D converter. In addition, the amplifier module 11 and the A / D converter 12 include amplifier modules 11-1 to 11-n respectively corresponding to the plurality of detectors 20-1 to 20-n (n is an integer) connected to the data logger 1. And A /
It comprises D converters 12-1 to 12-n.

Next, the operation will be described. First, an electric signal (analog signal) is constantly transmitted from the detector 20 to the data logger 1 regardless of the occurrence of an earthquake, and the data logger 1 amplifies the analog signal received by the amplifier module 11, and It is converted by the / D converter 12 into measurement data which is a digital signal. Next, when the measurement data is input to the CPU 2, the CPU 2 stores the measurement data in the storage medium 8.

After a lapse of the preset recording time, the CPU 2 reads out the communication processing program from the storage medium 8 and executes the communication processing. That is, the communication unit 9 is instructed to connect to the monitoring center 60 via the communication line 70, and an online connection with the monitoring center 60 is established. Next, the CPU 2 transmits the measurement data recorded in the storage medium 8 to the monitoring center 60.

After completing the transmission of the measurement data, the CPU 2
Deletes the transmitted measurement data in the storage medium 8 and restarts recording of the measurement data.

FIG. 2 shows a data logger 1 to which the present invention is applied.
FIG. 7 is a diagram illustrating a state of transmission of measurement data relating to vibration using the method shown in FIG. In FIG. 2, similarly to the transmission of the measurement data shown in FIG.
Are connected via a cable 40 and are permanently installed. After recording the measurement data for a predetermined time, the communication processing program automatically establishes a line connection to the monitoring center 70 and transmits the recorded measurement data.

As described above, the data logger 1 to which the present invention is applied transmits the recorded measurement data for a predetermined time to the monitoring center 60 via the communication line 70 online. Therefore, it is possible to reduce the conventional measurement data collection work offline and the enormous cost for the collection work. In addition, since it is possible to transmit data online without having to permanently install a personal computer etc. on site, the cost of the entire system can be reduced,
Maintenance is easy.

It should be noted that the present invention is not limited to the contents of the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention. Although it has been described as transmitting the measured data to the monitoring center 60, the transmission may be performed after recording of a predetermined capacity.

Although the data transmission direction has been described as one direction from the data logger 1 to the monitoring center 60,
Because of the online connection, various setting information may be transmitted from the monitoring center 60 to the data logger 1, and the data logger 1 may record measurement data based on the received setting information. For example, a process for setting the time of the data logger 1 is the same. Further, the communication line 70 has been described as a wireless or wired telephone line, but may be a dedicated line for transmitting measurement data or wireless communication using a dedicated channel.

[0040]

According to the first aspect of the present invention, for example,
It is possible to collect measurement data every hour or every other day, and it is possible to periodically and remotely grasp the vibration state at the site where the data logger is installed. In addition, it is possible to reduce the conventional work of collecting measurement data offline and the enormous cost of the collection work. Furthermore, since it is possible to transmit data online without the need for permanent installation of a personal computer, etc., the cost of the entire system can be reduced,
Maintenance is easy.

According to the second aspect of the present invention, for example, by transmitting the measurement data immediately before the storage capacity of the storage means becomes full, maintenance work accompanying the limitation of the storage capacity can be omitted. The maintainability of the logger can be improved. In addition, it is possible to reduce the conventional work of collecting measurement data offline and the enormous cost of the collection work. Further, since data can be transmitted online without the need for permanent installation of a personal computer or the like at the site, the cost of the entire system can be reduced and maintenance can be facilitated.

According to the third aspect of the invention, since the measurement data corresponding to each vibration detector is stored and transmitted in association with each other, the same usage method as that of the conventional data logger, that is, a plurality of vibration detectors is used. Can also be applied when connecting to a data logger.

According to the fourth aspect of the present invention, since the data logger is housed in a portable case, it can be easily transported and exchanged, and the installation area is small because the installation area is small. Regardless, the scope of application of the data logger can be expanded.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an internal configuration of a data logger 1 to which the present invention is applied.

FIG. 2 is a diagram showing a state of transmission of measurement data relating to vibration using a data logger 1 to which the present invention is applied.

FIG. 3 is a diagram illustrating transmission of measurement data relating to vibration using a conventional data logger 100.

FIG. 4 is a diagram showing an example of measurement data of one detector recorded on a data logger 100;

[Explanation of symbols]

 Reference Signs List 1 data logger 2 CPU 3 input unit 4 display unit 5 ROM 6 RAM 7 storage unit 8 storage medium 9 communication unit 11 amplifier module 12 A / D converter 20 detector 60 monitoring center

Claims (4)

[Claims] A storage means for storing predetermined measurement data relating to vibration; a determination means for determining whether or not measurement data for a predetermined time has been stored by the storage means; Transmission means for connecting to a predetermined communication line and transmitting the measurement data for the predetermined time when it is determined that the measurement data for one minute has been stored in the storage means. Logger. 2. A storage means for storing predetermined measurement data relating to vibration; a determination means for determining whether or not the measurement data stored by the storage means has reached a predetermined capacity; When it is determined that the measurement data stored in the storage means has reached a predetermined capacity, the transmission means is connected to a predetermined communication line and transmits the measurement data of the predetermined capacity. Data logger to do. 3. A conversion means for converting a vibration detection signal input from a plurality of vibration detectors into predetermined measurement data by A / D conversion, wherein the measurement data converted by the conversion means is converted into a predetermined measurement data. The data logger according to claim 1, wherein the data is stored in the storage unit in association with a corresponding vibration detector. 4. A data logger, wherein the data logger according to claim 1 is housed in a portable case.