JPS6373141A - Data retrieving apparatus - Google Patents

Abstract

PURPOSE:To shorten data retrieving time, by operating the similarity of measured data and peak intensity data, which are stored in a reference data memory, from the counted values of the counted pulses of subtraction times and the counted pulses of coincidences. CONSTITUTION:Peak intensity data (b) included in spectral data of an unknown material (a), which are obtained by an analyzer, are inputted in a peak intensity memory part 2a. Mass data (c) corresponding to the position of the peak intensities are stored in a mass memory part 2b. Peak intensity data (d) of a known material, which are read in an external memory device 4, are stored in a reference data memory 6. A subtracting part 18 substracts the data which are read out of the memory part 2a and the memory part 2b. An operation control part 28 computes the similarity of the stored peak intensity data from the counted values of a computation-time counter 20 and a coincidence-time counter 26. When the similarity exceeds a specified value, the material to be analyzed is judged to be material which indicates the peak intensity stored in the memory 6. Thus the retrieving time can be shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention is based on spectrogram data obtained with an analytical device such as a gas chromatography mass spectrometer or an X-ray diffraction device. The amount of data collected
The present invention relates to a data retrieval device used to identify a substance to be analyzed by retrieving matching data from a database.

(b) Prior art and its problems In general, analytical devices such as gas chromatography mass spectrometers and Matching spectrogram data is searched from a large amount of databases, and the substance to be analyzed is identified. In this case, the spectrum obtained from the unknown target substance usually contains many peaks, and the amount of spectrum data for each known substance to be searched is enormous.
It takes a lot of effort to do this work manually. For this reason, data searches have conventionally been performed using computers.

In conventional data retrieval using a computer, the spectrum data of various known substances are stored in advance as a database in an external storage device, etc., while the peak intensities contained in the spectrum data of unknown substances obtained by measurement are Matching with the database stored in the external storage device is performed based on the data and position data corresponding to the position of the peak intensity. There are various methods for this data retrieval, but conventional methods have the disadvantage that data retrieval takes time because all processing is performed using computer software. In particular, in recent years, the amount of databases accumulated has tended to increase dramatically, and search time has also increased accordingly. Therefore, it has been desired to speed up data retrieval.

The present invention has been made in view of the above circumstances, and an object of the present invention is to shorten data search time and obtain quick analysis results.

(c) Means for solving the problems In order to achieve the above object, the present invention adopts the following configuration. That is, the data retrieval device of the present invention comprises: a measurement data memory that stores peak intensity data included in the velocity data of an unknown substance obtained by the analyzer and position data corresponding to the position of the peak intensity; and an external storage. a reference data memory for storing the peak intensity data of the known substance read out from the device; and reading out the peak intensity data of the unknown substance and the corresponding position data from the measurement data memory;
a data readout section that reads peak intensity data of a known substance corresponding to the position data from the reference data memory based on the read position data; A subtraction section that subtracts peak intensity data and outputs a calculation count pulse for each subtraction calculation, and a subtraction section that compares the subtraction value obtained in this subtraction section with a preset tolerance value and determines whether the subtraction value is the tolerance value. a comparator that outputs a match count pulse when the difference is within the range, a computation counter that counts the computation count pulse from the subtraction unit, and a match counter that counts the match count pulse from the comparator; and an arithmetic control unit that calculates the degree of similarity between the peak intensity data stored in the measurement data memory and the reference data memory, respectively, based on the count values of both the counters.

(D) Effect In the data retrieval device of the present invention, peak intensity data included in the velocity data of an unknown substance obtained by the analyzer and position data corresponding to the position of the peak intensity are stored in the measurement data memory. , the peak intensity data of one known substance read from the external storage device is stored in the reference data memory.

The data readout section reads out the peak intensity data of the unknown substance and the corresponding position data from the measurement data memory, and also reads out the peak intensity data of the known substance corresponding to this position data from the reference data memory based on the read position data. Read the intensity data.

In this way, the peak intensity data of both the unknown substance and the known substance read together from both data memories are subtracted by the subtraction section. Furthermore, the subtraction unit outputs a calculation count pulse every time it subtracts both peak intensity data. This calculation number count pulse is counted by a calculation number counter.

Further, the comparing section compares the subtracted value obtained by the subtracting section with a preset tolerance value, and outputs a match count pulse when the subtracted value is within the tolerance value. This matching number count pulse is counted by a matching number counter.

The arithmetic control unit calculates the degree of similarity between the peak intensity data stored in the measurement data memory and the reference data memory, respectively, based on the count values of both counters, and if the degree of similarity is greater than or equal to a specified value, the substance to be analyzed is determined as the reference. It is determined that the substance exhibits the peak intensity stored in the data memory.

(e) Embodiment The drawing is a block diagram of a data search device according to an embodiment of the present invention. In this example, a case will be described in which the present invention is applied to a gas chromatography mass spectrometer.

In the figure, reference numeral 1 indicates the entire data retrieval device;
2 stores peak intensity data included in mass spectrometer data of an unknown substance obtained by a gas chromatography mass spectrometer (not shown) together with position data (in this example, mass number data) corresponding to the position of the peak intensity. This is a measurement data memory that stores peak intensity data, and includes a peak intensity memory section 2a that stores peak intensity data, and a mass number memory section 2b that stores mass number data corresponding to each peak intensity. In this example, it is assumed that the measurement data memory 2 has a capacity capable of storing 50 peak intensities and 50 mass numbers each.

4 is an external storage device such as a hard disk in which a large amount of reference data consisting of peak intensities and mass number data indicating the peak intensities for known substances is stored in advance as a database; 6 is read from the external storage device 4. This is a reference data memory that stores peak intensity data included in reference data of known substances.

In this example, it is assumed that the reference data memory 6 has a capacity to store 6000 peak intensities.

Reference numeral 8 denotes a write address conversion unit that converts the mass number data included in the reference data read from the external storage device 4 into atres data for writing peak intensity data into the reference data memory 6, and IO represents the mass number memory unit 2b. 12 is a switching circuit that selects the output of both the address converters 8 and IO described above. be.

Reference numeral 14 denotes an address counter that specifies a read address for the measurement data memory 2, and by addressing the address counter 3, the peak intensity data in the peak intensity memory section 2a and the corresponding quality m number memory section 2b are read.
mass number data are read out at the same time. Then, the address counter 14 and the read address converter lO
The switching circuit I2 reads out the peak intensity data and the corresponding quality data from the measurement data memory 2, and also reads out the peak intensity data and the corresponding quality data from the reference data memory 6 based on the read mass number data. A data reading section 16 is provided to read out the intensity data.

18 is a subtraction unit that subtracts the peak intensity data of the unknown substance and the known substance read out together from the measurement data memory 2 and the reference data memory 6, and outputs a calculation number count pulse for each subtraction calculation; This is a calculation number counter that counts the calculation number count pulse from the subtraction unit 18.

Further, 22 is a tolerance register that presets a tolerance value for the subtraction value obtained by the subtraction unit 18, 24 is a tolerance value register that compares the subtraction value obtained by the subtraction unit 18 with the tolerance value set by the tolerance value register 22, a comparison unit 26 that outputs a match count pulse when the subtracted value is within a tolerance value, and outputs a signal that increments the count value of the address counter 14 by one each time the subtraction value is compared with the tolerance value;
is a match counter that counts the match count pulses from the comparator 24.

28 is an arithmetic control unit that calculates the degree of similarity between the peak intensity data stored in the measurement data memory 2 and the reference data memory 6, respectively, based on the count values of the calculation number counter 20 and the coincidence number counter 26; C
Consists of PU.

Next, the data retrieval operation of the data retrieval device 1 of this embodiment will be explained.

First, before data search, perform the performance! The control unit 28 clears all of the measurement data memory 2, reference data memory 6, address counter 14, calculation number counter 20, and match number counter 26. Also,
The switching circuit 12 is switched to the write address converter 8 side, and furthermore, a preset allowable value is set in the allowable value register 22.

Next, the peak intensity data included in the spectrogram data of the unknown substance obtained by the gas chromatography mass spectrometer is stored in the peak intensity memory section 2a, and the mass number data corresponding to the position of each peak intensity is stored in the 'I'tm number memory section. 2
b, respectively.

On the other hand, the peak intensity data included in the reference data for one known substance read from the external storage device 4 is stored in the reference data memory 6, and the quality m number data corresponding to this peak intensity data is stored in the write address conversion unit 8. Each is sent out. Write address converter 8
converts the mass number data given from the external storage device 4 into trace data for writing peak intensity data into the reference data memory 6. Therefore, peak intensity data is stored in the reference data memory 6 at address positions corresponding to each mass number.

Next, the arithmetic control section 28 switches the switching circuit 12 of the data reading section 16 to the read address conversion section IO side. At this time, since the address counter 14 specifies the first address of the mass number measurement data memory 2, the peak intensity data stored at the first address of the peak intensity memory section 2a and the corresponding mass number memory The mass number data of section 2b is read out at the same time. The peak intensity data of one of the unknown substances read from the peak intensity memory section 2a is sent to the subtraction section 18. Also,
The mass number data read out from the mass number memory section 2b is
The read address converter 10 converts the peak intensity data into address data for reading out the peak intensity data from the reference data memory 6. Therefore, peak intensity data of one known substance is read out from the reference data memory 6h1. Then, this peak intensity data is converted to the subtraction unit 18.
will be sent to.

In this way, the peak intensity data of the unknown substance and the known substance of the same quality that are read out from the measurement data memory 2 and the reference data memory 6 are subtracted by the subtraction unit 18, and the subtracted value is sent to the next stage comparison unit. It will be sent out on 24th.

Furthermore, the subtraction unit 18 outputs a calculation count pulse every time it subtracts both peak intensity data. This calculation number count pulse is counted by the calculation number counter 20. The count value is given to the calculation control section 28.

The comparison unit 24 compares the subtraction value obtained by the subtraction unit 18 with a tolerance value set in advance in the tolerance register 22, and outputs a match count pulse when the subtraction value is within the tolerance value. This match number count pulse is counted by the match number counter 26, and the count value is given to the arithmetic control section 28. Furthermore, the comparison unit 24 includes the subtraction unit 1
Each time the value subtracted from 8 is compared with the allowable value, the address counter 14 is incremented by one. As a result, the readout address for the measurement data memory 2 is incremented one by one, and the peak intensity data and mass number data of the unknown substance are sequentially read out. Along with this, the readout address for the reference data memory 6 is also incremented. Therefore, the peak intensity data of the known substance is read out and the above operations are repeated one after another.

Address counter! When the count value of 40 counts up and reaches "50", a carry signal is output from the address counter 14, and this signal is input as an interrupt signal to the arithmetic control section 28. In response to this interrupt signal, the calculation control unit 28 stores the measured data memory 2 and the reference data memory 6 based on the count values of the calculation number counter 20 and the coincidence number counter 26.
The degree of similarity between the peak intensity data stored in the reference data memory is calculated, and if the degree of similarity is greater than or equal to a specified value, it is determined that the substance to be analyzed is a substance exhibiting the peak intensity stored in the reference data memory. If the degree of similarity is less than the specified value, the reference data of other known substances is read out from the external storage device 4 again, and the same operation as above is repeated.

Although this embodiment has been described with reference to a gas chromatography mass spectrometer, the present invention is not limited to this, and the present invention can be widely applied to devices capable of obtaining spectral data, such as an X-ray diffraction device.

(f) Effects As described above, according to the present invention, data retrieval is not performed by software processing as in the past, but a circuit dedicated to data retrieval is configured, so that it is possible to Data matching the transaction data can be searched within a short time. Therefore, excellent effects such as speedy analysis can be achieved.

[Brief explanation of the drawing]

The drawing is a block diagram showing the configuration of a data retrieval device according to an embodiment of the present invention. ■...Padata search device, 2...Measurement data memory,
4... External storage device, 6... Reference data memory, 16... Data reading section, 18... Subtracting section, 20... Calculation number counter, 24... Comparing section, 2
6... Match count counter, 28... Arithmetic control unit.

Claims (1)

[Claims] (1) A measurement data memory that stores peak intensity data included in the spectrum data of an unknown substance obtained by the analyzer and position data corresponding to the position of the peak intensity, and a known memory read out from an external storage device. a reference data memory for storing peak intensity data of the substance; and reading peak intensity data of the unknown substance and position data corresponding thereto from the measurement data memory;
a data readout section that reads peak intensity data of a known substance corresponding to the position data from the reference data memory based on the read position data; A subtraction section that subtracts peak intensity data and outputs a calculation count pulse for each subtraction calculation, and a subtraction section that compares the subtraction value obtained in this subtraction section with a preset tolerance value and determines whether the subtraction value is the tolerance value. a comparator that outputs a match count pulse when the difference is within the range, a computation counter that counts the computation count pulse from the subtraction unit, and a match counter that counts the match count pulse from the comparator; A data retrieval device comprising: an arithmetic control unit that calculates a degree of similarity between peak intensity data respectively stored in the measurement data memory and the reference data memory based on the count values of both the counters.