JPH06162217A - Data storage device - Google Patents

Abstract

PURPOSE:To execute the storage extending from a short time to a long time by only commanding a start and an end, and to improve the utilization efficiency of a storage capacity by changing automatically a period for storing fetched data in accordance with a data collection period. CONSTITUTION:In an interface circuit 1, data of a storage object fetched at every prescribed time, and in a processing circuit 2, a CPU 6 is operated, based on a program stored in a ROM 7 and an output signal from a keyboard circuit 3, and the data from the interface circuit 1 are inputted to a display circuit 4 and a storage circuit 5. In the storage circuit 5, the data are stored in a storage mechanism 14 through a storage controller 13. In this case, the storage controller 13 is allowed to have a period changing function for changing automatically a period for storage in accordance with a data collection period, and the fetched data are set automatically so that the period for storage divides roughly equally the data collection period. Accordingly, it is set simply, and also, except the data storage of a short period, the whole of the storage capacity is used, therefore, the utilization efficiency is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data storage device which captures various data at predetermined time intervals and stores the data in a storage medium such as a memory or a floppy disk, and the start and end of the data storage device are not particularly complicated. The present invention relates to a data storage device capable of storing data for a long time (period) with a simple setting by simply instructing, and improving the usage efficiency of storage capacity.

[0002]

2. Description of the Related Art Conventionally, in a data storage device that captures various data and stores them in a storage medium such as a memory or a floppy disk, the data is captured and stored at an arbitrary fixed period. And in order to store for a long time (period) with a determined storage capacity, it is an endless type,
When the free space is exhausted, the data is compressed at a constant magnification such as 2 times or 3 times to secure the storage area.
In this case, as one means of the data compression method, for example, data at regular intervals may be thinned out and stored again.

Further, in order to solve the above, a plurality of storage media are prepared to enable long-term storage.

However, in the above-described data storage device, since the data capturing interval is constant, the efficiency of use of the storage capacity of the storage medium and the time required for setting the conditions can vary greatly depending on the length of the data collection time. .

For example, if the data acquisition interval is too long, if the data collection time is too short, the entire storage capacity of the storage medium is not used, resulting in poor efficiency, and the data density is too coarse to obtain the necessary information. Sometimes I can't. vice versa,
If the capture interval is too short, when the data collection period is long, an event occurs at the time when the storage capacity of the storage medium is exceeded, and data may not be collected. That is, it is very difficult or complicated to set the condition when the time when the event to be collected occurs is not clear.

On the other hand, in the case of trying to collect data for T time in a storage medium having a storage capacity C in as much detail as possible, it is necessary to set a minimum settable value equal to or more than the storage period (T / C), and it is calculated in advance. And the troublesome work of setting is required.

[0007]

As described above, in the conventional data storage device, complicated storage conditions must be set when storing data for a long time (period) with a predetermined storage capacity. In addition, there is a problem that the usage efficiency of the storage capacity is poor.

An object of the present invention is to easily store data from a short time (period) to a long time (period) with a simple setting of instructing start and end without complicated setting. Another object of the present invention is to provide a data storage device capable of improving the usage efficiency of storage capacity.

[0009]

In order to achieve the above object, in the present invention, in a data storage device that captures data at predetermined time intervals and stores the data in a storage medium, a cycle for storing the captured data is set as a data collection period. And a cycle changing means for automatically changing the cycle according to

Here, in particular, as the cycle changing means,
The period for storing the captured data is automatically set so as to divide the data collection period into almost equal parts.

[0011]

Therefore, in the data storage device of the present invention,
By automatically changing the cycle of storing the captured data according to the data collection period, there is no need to specify the storage cycle, so the setting is extremely simple and
Except for short-term data storage, the entire storage capacity is always used, so the storage capacity is used efficiently.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the present invention, while the storage capacity remains, data is stored at a set minimum interval, and the interval of data to be stored (remaining storage) is gradually increased from the time when the storage capacity is full. However, the oldest data that does not fit into this new interval will be rewritten.

An embodiment of the present invention based on the above concept will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram showing an example of the configuration of a data collection device to which the data storage device according to the present invention is applied. That is, the present data collection device includes an interface circuit 1, a processing circuit 2, a keyboard circuit 3, a display circuit 4, and a storage circuit 5 which is a data storage device according to the present invention.
It consists of and. The keyboard circuit 3 and the display circuit 4 are not always necessary, and an external device may be used.

Here, the interface circuit 1 takes in the data to be stored at predetermined time intervals and outputs it to the data processing circuit 2 as data of a preset format.

Further, the processing circuit 2 includes a CPU 6 for performing various kinds of processing, a ROM 7 in which programs and the like for defining operations are stored, and a RAM 8 used as a work area.
The CPU 6 operates based on the program stored in the ROM 7 and the key signal from the keyboard circuit 3, and outputs the data from the interface circuit 1 to the display circuit 4 and the storage circuit 5.

On the other hand, the keyboard circuit 3 comprises a keyboard controller 9 and a keyboard 10. When the keyboard 10 is operated, the keyboard controller 9 generates a key signal and outputs it to the processing circuit 2.

Further, the display circuit 4 is the display controller 1
1 and a display unit 12, which takes in data from the processing circuit 2 and displays the display data from the display controller 11 on the display unit 12.

Further, the storage circuit 5 is composed of a storage controller 13 and a storage mechanism 14, and takes in data from the processing circuit 2 and stores it in the storage mechanism 14 via the storage controller 13. Here, the storage controller 13 stores the data acquired from the processing circuit 2 in the storage mechanism 1.
4 has a cycle changing function of automatically changing the cycle stored in 4 according to the data collection period. In addition, the storage mechanism 14
Consists of a memory, a floppy disk, etc.

Next, the operation of the present data collecting apparatus configured as described above will be described.

In FIG. 1, in the interface circuit 1, the data to be stored is taken in every predetermined time and converted into data of a preset format, and the data processing circuit 2
Entered in. Further, in the keyboard circuit 3, when the keyboard 10 is operated, a key signal output by the keyboard controller 9 is generated and input to the processing circuit 2.

On the other hand, in the processing circuit 2, the CPU 6 operates based on the program stored in the ROM 7 and the key signal output from the keyboard circuit 3, and the data from the interface circuit 1 is transferred to the display circuit 4 and the storage circuit. 5
Entered in.

Further, in the display circuit 4, the data from the processing circuit 2 is taken in, and the display data generated by the display controller 11 is displayed on the display unit 12.

Further, in the memory circuit 5, the data from the processing circuit 2 is fetched and stored in the memory mechanism 14 through the memory controller 13.

In this case, the storage mechanism 1 in the storage circuit 5
The data is stored in 4 by automatically changing the storage cycle according to the data collection period. That is, while the storage capacity of the storage mechanism 14 remains, the storage interval is set to the minimum set interval (hereinafter, referred to as interval 1).
When the storage capacity of 4 is exhausted, only the odd-numbered data at the interval 1 is newly stored, and the even-numbered data after the first data is rewritten sequentially. At this time, the storage interval is twice the minimum set interval (hereinafter referred to as the interval 2. The same applies to double or more).
It is said that When all the even-numbered data have been rewritten, the storage interval is lengthened to 4, 8, 16, ...

As described above, the period for storing the taken-in data is automatically set so as to divide the data collection period into substantially equal parts.

FIG. 2 is a schematic diagram showing an example of a data storage method in this case, and FIG. 3 is a flow chart showing an example of the data storage method. In the following, a case where the memory capacity is 7 is taken as an example.
The data storage method will be described more specifically. Here, the memory capacity is a minimum unit for storing one data, and may be one byte, one block or the like.

First, the processing is started from step F1.

Next, in step F2, the write data interval is initialized to R = 1.

Next, in steps F3 to F5, data is stored at R = 1 until the storage capacity of the storage mechanism 14 is exhausted (operation steps n = 1 to 7).

Next, in step F6, the data interval after writing is set to S = 2.

Next, in steps F7 to F20, the storage of data is continued until the stop signal is inputted (operation step = 8 to 12, 14 to 22 even steps, 26). However, the stop signal is an interrupt process and is not shown in the flowchart of FIG. Also,
Although the data write position is not shown in the flow chart,
After the second data. Here, the 7th data is
By steps F11, F12 and F17 to F19, processing is performed until the required data interval is secured (operation step n = 13, 23).

As described above, as long as the start and end of data collection are designated, the data in the period can be collected without designating the storage cycle. From the start to the end of storage, the storage capacity and the collection period indicate the storage cycle. The storage interval becomes constant without making complicated settings such as calculating.

As described above, in the present embodiment, in the data storage device for storing various data into the storage mechanism 14 by the storage controller 13 at predetermined time intervals,
The storage controller 13 is provided with a cycle changing function for automatically changing the cycle of storing the captured data according to the data collection period.

Therefore, the following various effects can be obtained.

(A) It is not necessary to specify the storage cycle when collecting data, and the setting is extremely simple.

(B) Since the entire storage capacity of the storage mechanism 14 is always used except for short-term data storage, it is possible to remarkably improve the usage efficiency of the storage capacity.

(C) It is possible to store data at almost constant intervals indefinitely only by designating the start and end of data collection.

(D) Since there is no conventional operation such as data compression, it is possible to reduce operational loss.

The present invention is not limited to the above embodiment, but can be implemented in the same manner as described below.

(A) By storing the data of the singular points such as the maximum and minimum values and the maximum and minimum values together with the normal storage, the characteristics of the data close to the true value can be stored even after the thinning. Becomes Alternatively, the singularity data may be stored in a separately prepared storage capacity portion or storage circuit.

(B) By storing the integrated value and the number of collected data, it becomes possible to easily know the average value of the data, and it is possible to easily know whether the data is transited by this.

(C) By using the present invention for the data collection form of the other storage circuit of the data storage device having a plurality of storage circuits, it is possible to collect data according to the recording period, and to store long-term data in endless storage. There is no need to do it, and old data will not be erased.

[0044]

As described above, according to the present invention, in a data storage device that captures data at predetermined time intervals and stores the data in a storage medium, the cycle of storing the captured data is automatically determined according to the data collection period. Since it is configured with a cycle changing means to change to, it is a short time (period) with a simple setting that only commands start and end without complicated settings.
Thus, it is possible to provide a data storage device that can easily store data for up to a long time (period) and can improve the usage efficiency of storage capacity.

[Brief description of drawings]

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

FIG. 2 is a schematic diagram for explaining a data storage method in the embodiment.

FIG. 3 is a flow chart for explaining a data storage method in the same embodiment.

[Explanation of symbols]

1 ... Interface circuit, 2 ... Processing circuit, 3 ... Keyboard circuit, 4 ... Display circuit, 5 ... Memory circuit, 6 ... CPU,
7 ... ROM, 8 ... RAM, 9 ... Keyboard controller, 10 ... Keyboard, 11 ... Display controller, 12
... indicator, 13 ... memory controller, 14 ... memory mechanism.

Claims (2)

[Claims] 1. A data storage device that captures data at predetermined time intervals and stores the data in a storage medium, comprising a cycle changing means that automatically changes the cycle of storing the acquired data according to a data collection period. A data storage device characterized by the above. 2. The data storage device according to claim 1, wherein the cycle changing means automatically sets the cycle for storing the fetched data so as to divide the data collection period into substantially equal parts.