JPH0514971A - Data collection device - Google Patents

Abstract

PURPOSE:To reduce the load on a transmission line and a central office processor in a data collection device composed of the central office and plural terminal offices inputting and collecting data. CONSTITUTION:Measured data is periodically collected in an analog data input processing part 1 and is stored in a storage processing part 2, and the measured data is checked by the judgment and check conditions set preliminarily in a data check processing part 5 and outputs a transmission command to a data transmission gate part 3 when the data is judged that it is necessary to transmit to a central office. The data transmission gate part 3 outputs the measured data stored in a storage processing part 2 for a period when it received the transmission command to a data transmission processing part 4 and the measured data for this period is transmitted to the central office with longer cycle than the said collection cycle from the data transmission processing part 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data collecting device for automatically transmitting measurement data collected by a plurality of terminal stations to a central station.

[0002]

2. Description of the Related Art FIG. 3 is a block diagram showing the processing on the terminal station side in a conventional data collecting apparatus disclosed in, for example, the public technical report No. 90-15468 issued by the Institute of Invention and Innovation. In the figure, 1 is an analog data input processing unit for periodically inputting and collecting analog values as measurement data, 2 is a storage processing unit for temporarily storing the measurement data input by the analog data input processing unit 4, 4 Is a data transmission processing unit that periodically transmits the measurement data accumulated in the storage processing unit 2 to the central office at a cycle longer than the input cycle.

Next, the operation will be described. After the measurement data input and collected by the analog data input processing unit 1 in a relatively short cycle is temporarily held in the storage processing unit 2, the data transmission processing unit 4 stores the measurement data in a central station (cycle) longer than the collection cycle. (Not shown).

[0004]

The conventional data collecting apparatus is constructed as described above, and since the collected measurement data is constantly transmitted to the central station periodically, the number of terminal stations and one terminal When the amount of measured data per station increases, there is a problem that a considerable load is applied to the transmission line and the processing device of the central station.

The present invention has been made in order to solve the above problems, and by transmitting only the minimum necessary measurement data to the central office only when necessary, the transmission line and the central office It is an object of the present invention to obtain a data collection device that can minimize the load on the processing device.

[0006]

A data collection device according to the present invention comprises a storage processing unit for storing measurement data input and collected at a predetermined cycle, and a central processing unit for checking the measurement data according to a predetermined condition designated in advance. A data check processing unit that determines whether the data is to be transmitted to the central office, and the measurement data stored in the storage processing unit during the period when the data check processing unit determines to transmit the data is transmitted to the central station at a cycle longer than the input cycle. The transmission means is provided.

[0007]

The data collecting device according to the present invention stores the measurement data input and collected in a predetermined cycle in the storage processing unit and checks the data according to a predetermined condition designated in advance by the data check processing unit. Only the measurement data of the period determined to be transmitted to the central station is transmitted from the storage processing section to the central station by the transmitting means in a cycle longer than the input cycle.

[0008]

EXAMPLES Example 1. An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 is an analog data input processing unit that periodically inputs and collects analog data values as measurement data, and 2 is a storage process that temporarily stores the measurement data input by the analog data input processing unit 1. Section 3, the storage processing section 2 stores the measurement data of the instructed period.
The data transmission gate unit 4 to be extracted from the data processing unit 4 is a data for periodically transmitting the measurement data extracted from the data transmission gate unit 3 of the measurement data stored in the storage processing unit 2 to the central station at a cycle longer than the input cycle. The transmission processing unit 5 checks the measurement data input by the analog data input processing unit 1 according to a predetermined condition, determines whether or not to transmit to the central office, and gives an instruction to the data transmission gate unit 3 Is.

Next, the operation will be described. The analog data input processing unit 1 periodically inputs analog data values and collects the measured data, which is temporarily stored in the storage processing unit 2 and also input to the data check processing unit 5. The data check processing unit 5 checks the measurement data according to the judgment and check conditions set in advance by the central office. This condition is, for example, that the value of the measurement data has changed suddenly or that the value of the measurement data is out of a predetermined range. When the data check processing unit 5 determines to transmit the measurement data to the central office, the data check processing unit 5 outputs a transmission command to the data transmission gate unit 3. The data transmission gate unit 3 outputs the measurement data stored in the storage processing unit 2 during the period in which the transmission command is received to the data transmission processing unit 4, and in the data transmission processing unit 4, at a cycle longer than the collection cycle, The measurement data of this period is transmitted to the central station (not shown).

Embodiment 2. FIG. 2 is a block diagram showing a process of the second embodiment of the present invention, and 6 is a command receiving process for receiving a command signal from a central office (not shown) and instructing the data transmission gate section 3 to issue a data transmission command. It is a department. The collection and storage of measurement data is the same as in the first embodiment. Here, when the command reception processing unit 6 receives a data transmission request from the central office, it outputs a transmission command to the data transmission gate unit 3. Upon receiving the transmission command, the data transmission gate unit 3 outputs the measurement data stored in the storage processing unit 2 to the data transmission processing unit 4, and the data transmission processing unit 4 outputs the measurement data in a cycle longer than the collection cycle. Send to central office (not shown). When the command reception processing unit 6 receives a data transmission stop request from the central office, it outputs a data transmission stop command to the data transmission gate unit 3 to stop the transmission of measurement data.
As described above, in the first embodiment, the measurement data is transmitted to the central station by the judgment and check inside the terminal station, but in the second embodiment, the measurement data is transmitted by the data transmission request command from the central station. However, since the transmission of the measurement data is stopped by the data transmission stop request, it is possible to flexibly deal with the load situation of the processing device of the central office.

[0011]

As described above, according to the present invention, since only the necessary measurement data is transmitted to the central office when necessary, the load on the transmission line and the processing equipment of the central office is reduced. There is an effect that can be obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing a data collection device according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a data collection device according to a second embodiment of the present invention.

FIG. 3 is a block diagram showing a conventional data collection device.

[Explanation of symbols]

1 Analog data input processing unit 2 Memory processing unit 3 Data transmission gate 4 Data transmission processing unit 5 Data check processing section 6 Command reception processing unit

Claims (2)

[Claims] 1. A storage processing unit for storing measurement data input and collected at a predetermined cycle, a data check processing unit for checking the measurement data according to a predetermined condition designated in advance and determining whether or not to transmit the measurement data to a central office. A data collection device comprising a transmission means for transmitting the measurement data stored in the storage processing unit during a period determined to be transmitted by the data check processing unit to the central office at a cycle longer than the input cycle. 2. A storage processing unit for storing measurement data input and collected at a predetermined cycle, and a cycle longer than the input cycle only during a period when a request for transmission of the measurement data stored in the storage processing unit is made from the central station. Data collection device equipped with transmission means for transmitting to the central office.