JPH08338843A - Data analyzer - Google Patents

Abstract

PURPOSE: To realize highly accurate operation without increasing the load on a host CPU by providing an operating unit having such pipe line structure as the data can be collected at a sampling period equal to an operating frequency being given and then processed. CONSTITUTION: When a CPU 11 delivers a start command and a reagent is thrown in, output from an object 12 is digitized through an A/D converter 13 and a pipe line operating unit 15 acquires the operating frequency thereof. The data is held by a data holding means 21 over two periods and a subtractor 22 determines the difference between data at the times of (i) and (i-1) thus obtaining the inclination at the time (i) Subsequently, an adder 23 and a shifter 24 average the inclinations at the times (i) and (i-1) to determine the variation rate at the time (i). If the variation rate exceeds a set value, an interruption output is returned from a comparator 25 to the CPU 11 thus notifying the start of reaction. Consequently, the data can be sampled at more accurate period than a programming method and the number of data to be collected can be increased without increasing the load on the CPU 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is directed to time-series data, particularly data having a relatively short reaction period (the time from the start to the end of the reaction), and detects the change point of such data. An analytical device for controlling.

[0002]

2. Description of the Related Art A conventional data analyzer will be described below with reference to the drawings. In FIG. 2, 11 is a CPU that controls the apparatus, 12 is an inspection target whose reaction can be known from the rate of change in output after a certain reaction time when a command from the CPU 11 is received, and 14 is an inspection target 12 to an AD converter 13.
The one-chip microcomputer is a register for reading the digital data input through the CPU 11 from the CPU 11 or takes in the data by an internal program and further performs a certain operation on the data.

When 14 is a register for reading data, the CPU 11 starts measurement and collects the result appearing in the register 14 in the operation cycle of the reading program. Since the reading speed in this case depends on the program, it is relatively low, and there are many variations in this collection period, and it is impossible to expect a constant collection period. In addition, when the data collected in this way is operated, not only the load on the CPU 11 increases and the problem is accelerated, but also other processing cannot be executed during this period, and the capability of the entire device is reduced. Will fall.

As a measure to reduce the load on the CPU 11,
A method of using a 1-chip microcomputer for 14 can be considered.
In this case, when the CPU 11 starts the 1-chip microcomputer 14, data collection / data calculation is performed by the program installed in the 1-chip microcomputer 14, and the 1-chip microcomputer 14 issues an interrupt each time the processing unit of one collection / calculation is completed. C
Report the result to PU11. The data sampling cycle in this case depends on the program operation cycle of the one-chip microcomputer 14, and it is impossible to expect a constant collection cycle as in the data collection method by the CPU 11.

[0005]

In the prior art, the sampling cycle of the result data depends on the program operating frequency of the CPU or the one-chip microcomputer. Since these two operating frequencies are relatively small, the number of samplings is limited, and when the inspection target contains a lot of high frequency components, they may cause errors and the accuracy of the collected data may decrease.

In addition, among the n points collected to improve the accuracy of the data, the calculation of the average value of (n-2) points excluding the maximum value and the minimum value as the result of one processing unit, and others When performing various calculations on the collected data, these load the CPU or the one-chip microcomputer to further reduce the sampling cycle, making it difficult to achieve both accuracy of data and calculation speed.

[0007]

In order to solve the above-mentioned problems, data is collected with an operating frequency given to it as a sampling period, and an arithmetic unit having a pipeline structure capable of arithmetic operation is provided, so that It is possible to obtain accurate results without increasing the load on the CPU.

[0008]

The operation of the present invention will be described below with reference to FIG. In FIG. 1, reference numeral 11 is a CP for controlling the device.
U and 12 are inspection targets that output time series data, 1
Reference numeral 5 is a pipeline arithmetic unit for taking in digital data input from the inspection target 12 through the AD converter 13 at a sampling period which is its operating frequency, and using some of them to generate unique data. Is.

When the analysis is started, the data output from the inspection object 12 is taken in at the sampling period, and
The calculation result data is generated. The result data is further sequentially compared with a certain set value, the reaction of the inspection object 12 is detected from this result, and the result is reported to the upper CPU by an interrupt. At this time, the upper CPU only starts and fetches the result data.

[0010]

Embodiments of the present invention will be described in detail below with reference to FIG. 3 and 5 are pipeline arithmetic units 1 of FIG.
5 is a block diagram of FIG.

In the analyzer targeted by the present invention, a reagent that reacts with a substance to be inspected is charged, and as a result, as shown in FIG. The reaction can be detected by catching this change point.

A case where the configuration of the pipeline arithmetic unit 15 is as shown in FIG. 3 will be described.

When the CPU 11 is activated and a reagent is put in, the output from the inspection object 12 is sequentially fetched as a digital value into the pipeline calculator 15 at the operating frequency through the AD converter 13. The fetched data is held by the data holding means 21 for two cycles. First, the subtracter 23 obtains the difference between the data at the time i and the data at the time (i-1) to obtain the slope of the time i, and then the adder 24 and the shifter 25. Then, the rate of change at time i is derived by taking the average of the slope at time i and the slope at time (i-1). Since these values are sampled at a very accurate cycle as compared with the method by the program, it is possible to obtain an accurate slope only by taking the difference between each data. If the rate of change thus calculated exceeds the set value, the CPU 11 knows that the reaction has started by returning the output from the comparator 26 as an interrupt.

For example, in the case of a test object showing a very high-speed reaction with a reaction period of 1 microsecond, the sampling cycle becomes almost the same as in the conventional data collection method by the program, and the cycle is also the same. Is not accurate for each event, there is a possibility that data will not be acquired within the reaction period shown in FIG. However, if the detection method according to the present invention is used, the sampling cycle can be set to an accurate cycle of about 100 nanoseconds, so that the number of collection points can be increased and the accuracy of data proportional to the number of data can be obtained. In addition, since the time to catch the change point can be shortened, it becomes possible to take a prompt action for the reaction.

As another embodiment, a case of collecting time-series data will be described. At this time, the configuration of the pipeline arithmetic unit 15 is as shown in FIG. When the CPU 11 starts up, the output from the inspection target 12 is input to the pipeline arithmetic unit 15 together with the data valid signal indicating that data is being collected, and the data valid signal is asserted in the adder 23. In the meanwhile, the numbers are successively added. The pipeline arithmetic unit 15 simultaneously counts the number of data input by the data number counter 27 and can obtain the average value while the data valid signal is asserted, and from the time when the collected data valid signal is asserted. The average value is output as collected data. In both cases, a required value can be calculated from the amount of data which is several tens of times that of the collection method by a program, and the data is sampled at a more accurate time, so that a highly accurate result can be obtained.

[0016]

As described above, according to the present invention, it is possible to accurately collect the data and to significantly increase the number of data collections without increasing the load on the CPU. Therefore, the accuracy of the calculation result can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a block diagram showing a conventional detection method.

FIG. 3 is a block diagram of a pipeline arithmetic unit.

FIG. 4 is an explanatory diagram of an example of output of an inspection target.

FIG. 5 is a block diagram of a pipeline arithmetic unit.

[Explanation of symbols]

11 ... CPU, 12 ... Inspection object, 13 ... AD converter, 1
4 ... Register, 15 ... Pipeline arithmetic unit.

Claims (2)

[Claims] 1. A data analyzer having an inspection object for outputting time-series data, wherein the time-series data is collected at an accurate cycle in order to sample at the operating frequency, and by this method, time i and time (i- By obtaining the difference between the data in 1) and using it as the slope at time i, the average is obtained from the k slopes obtained in the same manner, and the output of the arithmetic unit and the specific value (slope) of the inspection target are changed at any time. Having a data operation device of pipeline structure that captures the change point of the time series data output by the inspection target by comparing and determining,
A data analysis device, wherein the arithmetic unit detects a reaction point with respect to time-series data output from an inspection target due to a certain activation factor, and thereby analyzes the inspection target. 2. The data analysis according to claim 1, wherein the time-series data is collected at an appropriate cycle which is its operating frequency, and an average value of k pieces of data in the pipeline is used as collected data at that time. apparatus.