JPH05340771A - Data collecting device - Google Patents

Abstract

PURPOSE:To reduce the time difference between the actual acquiring time and recorded acquiring time of data by adding acquiring time to each data one by one like the player's uniform number. CONSTITUTION:A data selector 1 successively selects data from numerous analog signals and inputs the data to an A/D converter 2 and the converter 2 converts the data into digital signals and transfers the digital signals to a CPU 8 through a common bus line 3. The CPU 8 successively stores the digital signals at a prescribed address of the RAM of a PROM/ROM 7 whenever the time which is periodically generated by a calendar timer 4 comes following a program written in the PROM of the PROM/RAM 7. In other words, the digital signals are successively stored by adding the time, which is periodically generated by the timer 4 and at which the successive storage of digital signals is actuated, to the signals like the player's uniform number. Data collection is performed by repeating such operations. Therefore, the time difference between the actual acquiring time and recorded acquiring time of data can be eliminated.

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 collecting operating condition data of medical devices and the like.

[0002]

2. Description of the Related Art As a representative of conventional data collection devices,
There is an electrocardiogram data acquisition device in an electrocardiograph. this is,
An analog electrocardiographic signal is converted into a digital value by an analog-digital converter (hereinafter referred to as an AD converter), the value is captured by a computer, and stored in the storage unit. The data collected for a certain period of time is sequentially read from the storage unit after the collection is completed, and the data is displayed on a cathode ray tube display device (hereinafter C
(RT) is displayed as an electrocardiographic waveform. Alternatively,
The read data is recorded by a recorder after being converted from a digital value to an analog signal. This is the current general application technology. This application is used as follows.

First, in order to use the collected data, data analysis of a certain section may be performed. In this case, it is general practice to read the signal accumulated in the storage unit from the beginning of the section and grasp its contents by various phenomena such as the amplitude, cycle, and frequency of electrocardiographic waveform.

In order to collect information on signals, such as temperature, flow rate of liquid, and pressure, in which phenomena continue for a certain period of time, it is often practiced to periodically sample the signals and accumulate and analyze the data. ing. In this case, the data collection start time is generally taken as the starting point for displaying data.

[0005]

Table 1 shows an example of data acquisition of a dialysis machine. A plurality of data such as temperature, flow rate, pressure 1 and pressure 2 are collected every 30 seconds based on the data acquisition time. Table 1 shows some of them. It is usual to store the same arrangement in the storage unit of the computer.

Data acquisition by the computer device is performed in a time division manner. Therefore, when acquiring a plurality of data, the acquisition time, for example, 11:11:58 in Table 1 is used.
This time indicates the representative time of a plurality of data groups. Therefore, the greater the number of data groups and the number of data in the group, the greater the difference between the actual acquisition time and the recorded acquisition time. Will lack.

In order to solve such inconvenience, a selector for selecting data from the data group at high speed, a high speed AD converter, a computer for controlling these at high speed, etc. are required. To satisfy this, a considerable cost increase occurs.

Further, when the specific data is extracted from the data group, the arrangement of Table 1 is performed as follows.
First, the desired time is searched and the group corresponding to that time is identified. Next, desired data is read out by designating the order of the data in that group. For example, pressure 1
If so, read the third numerical value. Thus, the computer needs to do two jobs.

The above-mentioned inconvenience is also applicable to the case where a graph is created with the temperature, flow rate, pressure 1 and pressure 2 data in Table 1 as the vertical axis and time as the horizontal axis. That is, there is a drawback that the real-time property is lacking and that a process such as data reading takes a considerable amount of time.

Thus, the greater the number of data groups, the greater the difference between the actual acquisition time and the recorded acquisition time. In order to solve this inconvenience, a selector for selecting data at high speed from the data group and a high-speed A
This can be solved by preparing a D converter and a computer that controls these at high speed. However, this comes at a considerable cost.

The present invention has been made under such a background, and an object thereof is to provide an inexpensive data collecting apparatus in which the difference between the actual data acquisition time and the recorded data acquisition time is small. And

[0012]

An AD converter for converting an input analog signal into a digital signal, a storage means for storing digital data, and a digital signal output from the AD converter as digital data. Data acquisition means, a timer for generating time at a fixed cycle, activation means for activating the data acquisition means at each time generated by the timer, digital data acquired by the data acquisition means at the time And a writing means for writing in the storage means.

[0013]

According to the present invention, each data acquisition time is added to each data like a uniform number. Thus, by clarifying the acquisition time of each data, it is possible to eliminate the time delay for each group. Therefore, a low-speed AD converter and computer are sufficient, and the cost is low. Also, by using the acquisition time as a key,
You can search for individual data once.

[0014]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 shows an embodiment of a data collection device according to the present invention.

In FIG. 1, reference numeral 1 is a data selector. The data selector 1 selects and outputs one analog signal from the n analog input signals by a digital selection signal supplied from the outside. For example, 4 to 1
A semiconductor integrated circuit capable of switching 6 channels (hereinafter I
C) is commercially available, so it can be used.

The analog signal selected by the data selector 1 is sent to the AD converter 2. The AD converter 2 is for converting an analog signal into a digital signal, and an 8-bit to 16-bit accurate one is commercially available.

The digital signal output from the AD converter 2 is transferred to the microcomputer 8 (hereinafter referred to as CPU 8) through the common bus line 3 and processed.

The data processed by the CPU 8 is transferred to the image controller 5 via the common bus line, and CR
It is displayed on the T display device 6. The image controller 5 is an IC including an image storage unit, and outputs characters, diagrams, and the like to the CRT display device 6 in response to a command from the CPU 8. Although the CRT display device 6 is a cathode ray tube display device, it can also be used in a plasma display device, a liquid crystal display device or the like.

The calendar timer IC 4 takes charge of time generation and time management. PROM / RAM7 is CPU8
Read-only memory (PROM) and random access memory (RAM) that store programs and data
Therefore, a commercially available IC can be used. A commercially available 8-bit or 16-bit microcomputer IC can be used as the CPU 8.

With the above configuration, one data is sequentially selected from the n analog signals by the data selector 1, and the selected analog signal is input to the AD converter 2. The digital signal output from the AD converter 2 is transferred to the CPU 8 via the common bus line 3.

The CPU 8 is the PRO of the PROM / RAM 7.
Calendar timer 4 by the program written in M
The digital signal is sequentially stored in a predetermined address of the RAM 7 every time the signal is periodically generated. That is, the calendar timer 4 periodically generates the digital signal storing operation, and the time when the digital signal storing operation is started is added to the digital signal and stored. Data is collected by repeating this operation.

Table 2 shows an example in which the data shown in Table 1 is obtained by the apparatus of this embodiment. That is, four phenomena are grouped into one group, and n is set at intervals of about 30 seconds based on the temperature.
This is an example of acquisition. As shown in this example, by attaching a time uniform number to each phenomenon, the phenomenon within a group may be acquired within 30 seconds, which is the group interval. Since the acquisition time is accurate for each data,
Data that accurately corresponds to the temporal changes of each physical phenomenon can be acquired.

FIG. 2 shows a diagram when the temperature in Table 2 is used as the starting point. Although FIG. 2 shows the three phenomena collectively, it is possible to further improve the accuracy of correspondence with time by creating separate diagrams for each one phenomenon. In FIG. 2, the time when data is actually acquired is entered on the time axis. Therefore, with this method, it is possible to obtain a diagram with good real-time characteristics.

[0025]

[Table 1]

[0026]

[Table 2]

[0027]

As described above, according to the present invention,
The acquisition time of each data can be made clear by adding the acquisition time of each data to each data like a uniform number. Therefore, the difference between the actual data acquisition time and the recorded data acquisition time can be eliminated. Therefore, a low-speed AD converter and computer are sufficient, and the cost is low. Further, by using the acquisition time as a key, the individual data can be searched once.
Furthermore, the exact acquisition time can be recorded even if the number of phenomena in the group is increased.

[Brief description of drawings]

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

FIG. 2 is a diagram created based on the data acquired in the above embodiment.

[Explanation of symbols]

 1 Data Selector 2 AD Converter 3 Common Bus Line 4 Calendar / Timer 5 Image Controller 6 CRT Display Device 7 PROM / RAM 8 CPU

Claims (1)

[Claims] 1. An AD converter that converts an input analog signal into a digital signal, a storage unit that stores digital data, and a data acquisition unit that acquires the digital signal output from the AD converter as digital data. A timer for generating a time in a fixed cycle, an activation means for activating the data acquisition means at each time generated by the timer, the digital data acquired by the data acquisition means, the storage means together with the time And a writing unit that writes the data to the data collection device.