JP3334391B2 - Analyzer management system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a management system for an analyzer in which a plurality of powder or fluid analyzers are installed in remote places, and these analyzers are centrally controlled at one place.

[0002]

2. Description of the Related Art In general, a gas analyzer is designed to measure dirty high-temperature exhaust gas, so that maintenance of a sampling part and maintenance of a detecting part such as a decrease in luminance of a light source in an infrared gas analyzer are required. Will be needed. On the other hand, a power plant is provided with a plurality of flues, and a plurality of gas analyzers for analyzing exhaust gas from these flues are also installed at locations away from each other. Therefore, if maintenance is performed by going to the installation site of each analyzer, a large number of people and time are required.

[0003] For this reason, a system has been proposed in which a management device is provided for a plurality of analyzers via communication means, and the operating state of the analyzers is centrally managed at one place.

[0004]

Here, if the accuracy of the analyzer has been reduced and maintenance has been performed after a missing measurement, the analyzer cannot be used, or the analyzer must be quickly operated in the event of a failure. You have to keep a large number of maintenance stocks to keep up. Therefore, it is important to perform centralized management and to predict in advance the timing of component replacement and a failure.

Accordingly, the present invention is to provide a specific management system which not only can centrally manage a powder fluid analyzer which often requires maintenance, but also predicts a time for replacement of parts and a failure. Therefore, an object of the present invention is to make it possible to use a plurality of analyzers stably for a long period of time.

[0006]

To achieve the above object, the present invention provides a method and a method for measuring a powder or a fluid, comprising a plurality of powder / fluid analyzers having a detection unit and a calculation unit, and a communication unit. A management system for an analyzer, comprising: a management device that manages an operation state of each of the analyzers, wherein a maintenance reference value is used as a reference as to whether it is necessary to replace or maintain each part of the detection unit. And a prediction reference value for storing, for a plurality of types of parts, a prediction reference value that is a reference as to whether the time to replace or maintain each part of the detection unit is approaching. A storage unit,
Comparison of measured values such as the temperature of the electronic cooler, the flow rate of the sample gas, and the calibration coefficient measured by the detection unit of the analyzer with the maintenance reference value and the prediction reference value, and outputting a maintenance signal or a preparation signal. Means, and a display control device which constitutes a part of the management device and displays the comparison result on a display of the management device for each of the powder fluid analyzers, the maintenance reference value storage unit, the prediction The reference storage unit, the determination unit, and the display control device are provided in the management device.

[0007]

According to the present invention, not only the maintenance reference value of the detection unit but also
Stores a prediction reference value, which is a reference as to whether the time to perform replacement or maintenance of each part of the detection unit is approaching, compares this prediction reference value with the measurement value of the detection unit, and displays the comparison result on the management device. Since the information is displayed on the analyzer, the operator can see the display contents and make an order for replacement parts of each analyzer and prepare for maintenance in advance.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, the management system includes a plurality of gas analyzers 1 and one personal computer (management device) 5 that manages the operation state of each analyzer 1 via a communication unit 3. Each of the analyzers 1 is installed in a place apart from each other, for example, near a flue of a power plant.

First, the outline of the analyzer 1 will be briefly described. 2, the analyzer 1 includes a pump P for taking in a part of the exhaust gas G from the flue C. The exhaust gas G is introduced into the electronic cooler 11 through the filter F to be dehumidified as indicated by the two-dot chain line, and the flow rate is measured by the flow meter 12, and thereafter, is introduced into the cell 14. The analyzer 1 is, for example, a well-known non-dispersive infrared gas analyzer (see Japanese Patent Publication No. 56-48822), which absorbs infrared rays from the light source 15 into the exhaust gas G in the cell 14, By detecting the amount of transmitted infrared light, the concentration of NOx or the like in the exhaust gas is analyzed. The electronic cooler 11 includes a temperature sensor 13, and a microcomputer (microcomputer) from the detection unit 10 (FIG. 1) including the temperature sensor 13, the flow meter 12, and the infrared detector 16 via an interface 17 and the like. The temperature, the flow rate, and the transmission amount of infrared rays are output to a computer (calculation unit) 20.

The microcomputer 20 of the analyzer 1 shown in FIG.
The concentration of NOx and the like in the exhaust gas G is obtained based on the flow rate, the calibration coefficient stored in the calibration coefficient storage unit 23, and the like. Further, the analyzer 1 includes a calibration coefficient calculating means 22. The calibration coefficient calculating means 22 takes a calibration gas having a known concentration into the cell 14 (FIG. 2) of the detection unit 10 and obtains the measurement. The calibration coefficient is calculated by comparing the concentration with the actual concentration of the calibration gas. The obtained calibration coefficients are stored and updated in the calibration coefficient storage unit 23.

In FIG. 2, the flow rate of the exhaust gas G gradually decreases due to the clogging of the filter F. In addition, the temperature of the electronic cooler 11 rises due to the deterioration of the Peltier element constituting the electronic cooler 11, and the function of separating water decreases. Further, since the sensitivity is reduced due to the decrease in the brightness of the light source 15 and the contamination of the cell 14, the calibration coefficient must be updated to a large value. If these deterioration over time becomes larger than a predetermined limit, the measurement accuracy of the analyzer cannot be maintained,
The following management system is provided.

The communication means 3 shown in FIG. 1 includes, for example, modems 31 and 32 of the analyzer 1 and the personal computer 5 and a telephone line 3.
3

The personal computer 5 includes a microcomputer (microcomputer) 50, interfaces 51 and 52, a display 53, and the like. The microcomputer 50 includes a determination unit 5
4. A maintenance reference value storage unit 55, a prediction reference value storage unit 56, a display control unit 57, and the like are built in.

The maintenance reference value storage unit 55 includes a detection unit 10
Are stored for a plurality of types of parts. On the other hand, the prediction reference value storage unit 56 stores, for a plurality of types of components, prediction reference values that serve as a reference as to whether the time to replace or maintain each component of the detection unit 10 is approaching.

The maintenance reference value and the prediction reference value include the temperature of the electronic cooler 11 (FIG. 2), the flow rate of the sample gas G, and the maintenance reference value and the prediction reference value of the calibration coefficient, respectively. For example, the electronic cooler 11 (FIG. 2)
Is usually controlled at 5 ° C. ± Δα ° C., but at 15 ° C., water separation cannot be sufficiently performed. Therefore, 15 ° C. is stored in the maintenance reference value storage unit 55 as the maintenance reference value, and, for example, 10 ° C. is stored in the prediction reference value storage unit 56 as the prediction reference value.

The discriminating means 54 compares the measured value measured by the detecting section 10 of each analyzer 1 with each of the maintenance reference values and the prediction reference values, and outputs a maintenance signal or a preparation signal. That is, the determination unit 54 compares the measured temperature from the temperature sensor 13 with the maintenance reference temperature and the predicted reference temperature of both the storage units 55 and 56, and if the measured temperature has reached the maintenance reference temperature, the electronic cooler 11 outputs a maintenance signal, and if the measured temperature is between the predicted reference temperature and the maintenance reference temperature, a maintenance preparation signal for the electronic cooler 11 is output.

The determining means 54 compares the measured flow rate from the flow meter 12 of each analyzer 1 with the maintenance reference flow rate and the predicted reference flow rate of both storage units 55 and 56, and determines that the measured flow rate is smaller than the maintenance reference flow rate. If the measured flow rate is between the maintenance reference flow rate and the predictive reference flow rate, a replacement signal (maintenance signal) for the filter F (FIG. 2) is output. Is output.

Further, the determination means 54 calculates the calibration coefficient calculated by the calibration coefficient calculation means 22 of each analyzer 1, or
The calibration coefficient stored in the calibration coefficient storage unit 23 is compared with the maintenance reference calibration coefficient and the prediction reference calibration coefficient of both storage units 55 and 56, and the updated (current) calibration coefficient exceeds the maintenance reference calibration coefficient. Optical bench section (14-16)
Is output. On the other hand, if the updated calibration coefficient is between the prediction reference calibration coefficient and the maintenance reference calibration coefficient, an exchange preparation signal for the optical bench section is output.

Based on these output signals, the display control means 57 causes the display 53 to display the comparison result for each of the analyzers 1. An example of this display content is shown in FIG. As shown in FIG. 3, the electronic cooler 11 of the first unit
When the temperature of FIG. 2 exceeds 10 ° C., that is, when the preparation signal for the electronic cooler is output, a message “prepare to replace the cooler” appears. Parts can be prepared in advance. When the exchange signal is output, the message "Replace the cooler" is displayed and the alarm 18 of the analyzer 1 in FIG. 1 is activated.

As described above, according to the present system, not only the gas analyzers that require frequent maintenance can be simply managed in a centralized manner, but also the replacement time of parts and the prediction of failure can be predicted. Can be used stably over a period. Inexpensive parts are replaced immediately at the prediction display stage, while expensive parts are prepared at the prediction stage and replaced immediately after reaching the maintenance standard value. It is also possible to improve the performance.

In this embodiment, the discriminating means 54, the maintenance reference value storage unit 55, and the prediction reference value storage unit 56 are provided in the microcomputer 50 of the personal computer 5.
4 to 56 may be provided in the microcomputer 20 of each analyzer 1. However, since the maintenance reference value and the prediction reference value will differ depending on the user, in order to standardize the analyzer 1, the determination means 54, the maintenance reference value storage unit 55, and the prediction reference value storage unit 56 are connected to the personal computer 5. It is preferable to provide it inside.

FIG. 4 shows a main part of a modification. In this modified example, the estimated life calculating means 5 is provided in the microcomputer 50 of the personal computer 5.
8 and a calibration coefficient history storage unit 59.
The difference from the embodiment of FIG. 1 is that the calibration reference prediction reference value is not stored in the prediction reference value storage unit 56. The calibration coefficient history storage section 59 sequentially stores the calibration coefficients calculated and updated by the calibration coefficient calculating means 22 in FIG. 1. As shown in FIG. Store the history. Based on the rate of change of the calibration coefficient stored in the calibration coefficient history storage unit 59 and the maintenance reference calibration coefficient stored in the maintenance reference value storage unit 55, the estimated life calculation unit 58 determines that the calibration coefficient A period until the calibration coefficient value is reached is estimated, and the estimated period is output. This estimation period is displayed on the display 53 (FIG. 1).

For example, the estimation period T is calculated based on the following equation (1) or (2). K. When ≧ 1, T = Tn · (KLIM1-1) / (KLIM1-K) (1) K <1 T = Tn · (1-KLIM2) / (1−K.) (2) Tn: Service period from the last replacement to the current time KLIM1: Maintenance reference calibration coefficient value (normally 1.3 to 1.45
KLIM2: Maintenance reference calibration coefficient value (usually often set to 0.7 to 0.77) K. : Current calibration coefficient (initial value = 1) The other configuration is the same as that of the embodiment of FIG. 1, and the same or corresponding parts are denoted by the same reference characters and their illustration and detailed description are omitted.

In the above embodiment, the communication means 3 shown in FIG. 1 is constituted by the modems 31, 32 and the telephone line 33. However, the communication means 3 may be any means capable of collecting information at one place. For example, an optical fiber or a wireless modem may be used in addition to a wired electric signal. Further, the present invention can be applied not only to a gas analyzer, but also to a dust measuring device and the like.

In the above embodiment, for example, only one prediction reference value for temperature is stored.
Two or more prediction reference values may be stored for one component.

[0026]

As described above, according to the present invention,
Stores not only the maintenance reference value of the detection unit but also a prediction reference value that is a reference as to whether it is time to replace or maintain each part of the detection unit, and compares this prediction reference value with the measurement value of the detection unit. Then, since the comparison result is displayed on the display device of the management device, the operator can preliminarily order replacement parts and prepare for maintenance by looking at the displayed contents. Therefore,
Not only can centralized control of powder fluid analyzers that require frequent maintenance, but also by providing a specific management system that predicts component replacement times and failures, extends the length of multiple analyzers. It can be used stably over a period. In addition, by providing the maintenance reference value storage unit, the prediction reference storage unit, the determination unit, and the display control device in the management device, it is possible to cope with the maintenance reference value and the prediction reference value that differ depending on the user, and standardization of the analysis device. It has an advantage in planning.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a management system for an analyzer showing one embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a gas analyzer.

FIG. 3 is a diagram illustrating an example of a display method.

FIG. 4 is a schematic configuration diagram showing a modification of the management device.

[Explanation of symbols]

 1: Analysis device 10: Detection unit 14: Cell 22: Calibration coefficient calculation unit 23: Calibration coefficient storage unit 3: Communication unit 5: Management device (PC) 50: Microcomputer 54: Judgment unit 55: Maintenance reference value storage unit 56: Predicted reference value storage unit 57: display control unit 58: estimated life calculation unit 59: calibration coefficient history storage unit C: flue G: exhaust gas

Continuation of the front page (56) References JP-A-6-261378 (JP, A) JP-A-63-299497 (JP, A) JP-A-64-6847 (JP, A) JP-A-4-279918 (JP) JP-A-4-225184 (JP, A) JP-A-6-265374 (JP, A) JP-A-4-92997 (JP, A) JP-A-6-195021 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01N 21/00-21/61 G01N 35/00-35/08 Practical file (PATOLIS) Patent file (PATOLIS)

Claims (6)

(57) [Claims] 1. A system comprising: a plurality of powder fluid analyzers having a detection unit and a calculation unit for measuring powder or fluid; and a management device managing the operation state of each of the analyzers via communication means. A management reference value storage unit for storing, for a plurality of types of components, a maintenance reference value that is a reference as to whether or not each component of the detection unit needs to be replaced or maintained; A prediction reference storage unit that stores, for a plurality of types of components, a prediction reference value that is a reference as to whether replacement or maintenance of each component of the detection unit is approaching; and a temperature of the electronic cooler measured by the detection unit. A determination unit that compares a measured value such as a flow rate of a sample gas and a calibration coefficient with the maintenance reference value and the prediction reference value, and outputs a maintenance signal or a preparation signal; A display control device for displaying the fruits on a display of a management device for each of the powder fluid analyzers, wherein the maintenance reference value storage unit, the prediction reference storage unit, the determination unit, and the display control device are An analysis device management system provided in the management device. 2. The method according to claim 1, wherein the calculating unit includes a calibration coefficient calculating unit that obtains and updates a calibration coefficient, and the determining unit compares the updated calibration coefficient with the maintenance reference value and the prediction reference value. And a management system for an analyzer that outputs a maintenance signal or a preparation signal. 3. The calibration unit according to claim 1, wherein the calculation unit includes a calibration coefficient calculation unit that obtains and updates a calibration coefficient, wherein the management device includes a calibration coefficient history storage unit that stores a history of the calibration coefficients. A management system for an analysis apparatus including an estimated life calculation unit that estimates a period until the calibration coefficient reaches the maintenance reference value based on the rate of change of the coefficient and the maintenance reference value of the calibration coefficient, and outputs the estimated period. . 4. The calibration device according to claim 2, wherein the management device includes a calibration coefficient history storage unit that stores a history of the calibration coefficient, and a calibration coefficient based on a rate of change of the calibration coefficient and a maintenance reference value of the calibration coefficient. A management system for an analyzer, comprising: an estimated life calculating means for estimating a period until a maintenance reference value is reached and outputting the estimated period. 5. The method according to claim 1, 2, 3, or 4,
A management system for an analyzer, wherein the maintenance reference value storage unit, the prediction reference value storage unit, and the determination unit are built in a microcomputer of the management device. 6. The analyzer according to claim 1, wherein the powder fluid analyzer is a sample gas analyzer that detects a part of exhaust gas from a flue in a cell. Management system.