JPH05334457A - Noise analyzing device - Google Patents

Abstract

PURPOSE:To obtain an optimum noise counterplan within a short time by retrieving a database when noise measuring data measured from a device to be counterplanned is larger than a standard value, selecting counterplan parts (a counterplan method) corresponding to the noise and including the value of the selected parts within the standard value. CONSTITUTION:A system controller 4 is provided with a counterplan information extracting processing 41 for comparing noise measuring data measured from the device to be counterplanned with a specified standard value and extracting a frequency range and attenuation amount necessary for a counterplan and counterplan information determining processing 42 for selecting circuit constitution based upon the extracted frequency rang(and attenuation amount, determining a constant corresponding to the noise and repeating the determination and selection of the succeeding constant and circuit constitution until the calculated attenuation amount is satisfied and constituted so that the circuit constitution and the constant satisfying the frequency range and attenuation amount extracted by the processing 42 are displayed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a noise analysis device for analyzing noise of a device to be protected. It is desired to analyze noise in electronic devices such as computers and air conditioners and take countermeasures against it by using a computer system.

[0002]

2. Description of the Related Art Conventionally, when a noise is generated by a device such as a computer and a countermeasure is taken, an engineer measures the noise generation level with a measuring instrument such as a spectrum analyzer, and if the noise level is higher than the standard noise level, the engineer thinks. It was erroneously repeated based on past experience while changing the parts and structure to take measures to keep the noise within the standard.

[0003]

Conventionally, as described above, an engineer measures the noise generated by the device and changes the parts and the structure by thinking and error to take measures so that the noise falls within the standard. Noise countermeasure time required for one model requires a long time (for example, about 24 hours), and knowledge of which component will be replaced and what kind of structure will generate the generated noise within the standard However, there is also a problem in that measures cannot be swiftly implemented unless the user is skilled.

The present invention solves these problems by
When the noise measurement data measured from the device to be measured is larger than the standard value, the database is searched and the countermeasure component (countermeasure method) according to the noise is selected and kept within the standard value to provide the optimum noise countermeasure. The purpose is to get in a short time.

[0005]

[Means for Solving the Problems] Means for solving the problems will be described with reference to FIG. In FIG. 1, the countermeasure information extraction processing 41 compares the measured data of the noise measured from the countermeasure target device with the instructed standard value, and extracts the frequency range and the attenuation amount that require countermeasures.

The countermeasure information determining process 42 selects a circuit configuration for the frequency range and attenuation extracted by the countermeasure information extracting process 41 and determines a constant corresponding to noise,
Repeat the next candidate constant and circuit configuration until the calculated attenuation is satisfied, or set a countermeasure and repeat the selection of the next candidate countermeasure until the attenuation corresponding to noise is satisfied. It is a thing.

The circuit configuration list 51 is for registering a list of circuit configurations. The countermeasure component list 52 is for registering the components having the circuit configuration registered in the circuit configuration list 51.

The countermeasure component characteristic data 53 is used for registering the constants of the components registered in the countermeasure component list 52 and the attenuation amount of the countermeasure method registered in the countermeasure method data 54.

[0009]

According to the present invention, as shown in FIG. 1, the countermeasure information extraction processing 41 compares the noise measurement data measured from the countermeasure target apparatus with the instructed standard value, and measures the frequency range and the attenuation amount ( For example, the voltage) is extracted, the circuit configuration is selected for the frequency range and the attenuation amount required for the countermeasure extracted by the countermeasure information determination processing 42, the constant corresponding to the noise is determined, and the calculated attenuation amount is satisfied. Until the next candidate constant and circuit configuration are repeated, the satisfied circuit configuration and constant are displayed. At this time, the countermeasure information determination processing 42 selects one circuit configuration having a high priority from the circuit configuration list 51, takes out the component having the selected circuit configuration from the countermeasure component list 52, and extracts this component from the countermeasure component characteristic data 53. A constant corresponding to noise is taken out, the attenuation is calculated based on the taken out constant, and when it is not satisfied, the parts countermeasure list 52, the countermeasure parts characteristic data 53, and the circuit configuration list 51 are repeated for the next candidate, and the satisfaction is satisfied. The circuit configuration, components and constants to be determined are determined.

The countermeasure information extraction processing 41 compares the noise measurement data measured from the countermeasure target apparatus with the instructed standard value, extracts the frequency range and the attenuation amount (for example, the electric field strength) required for the countermeasure, and determines the countermeasure information. The countermeasure method is set for the frequency range and the attenuation amount required for the countermeasure extracted by the process 42, and the countermeasure method for the next candidate is repeatedly set until the attenuation amount corresponding to the noise is satisfied, and the countermeasure method is satisfied. Is displayed. At this time, the countermeasure information determination process 42 sets one countermeasure method having a higher priority from the countermeasure method data 54 for the frequency range and the attenuation amount that require countermeasures, and the countermeasure component characteristic data 53 indicates the countermeasure method thus set. The attenuation amount is extracted, and when it is not satisfied, the next candidate of the countermeasure method data 54 and the countermeasure component characteristic data 53 is repeated, and the satisfied countermeasure method is determined.

Therefore, when the noise measurement data measured from the device to be countermeasure is larger than the standard value, the database is searched to find a countermeasure component (countermeasure method) corresponding to the noise (frequency range, voltage, electric field strength). It is possible to select and fit within the standard value and display the optimum noise countermeasure in a short time.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the construction and operation of an embodiment of the present invention will be described in detail with reference to FIGS.

FIG. 1 shows a block diagram of an embodiment of the present invention.
In FIG. 1, the device to be treated 1 is a device that measures the intensity of noise and takes countermeasures so that the noise falls within the standard.

The noise measuring system 2 measures noise radiated by the device to be countered 1 to a power source or as a radio wave, and is a spectrum analyzer or the like. The noise measuring system 2 measures noise (voltage, electric field strength) with respect to frequency, as described later (see (a) of FIG. 7 and (a) of FIG. 11).

The information terminal 3 receives the measurement data from the noise measuring system 2, passes the measurement data to the system controller 4, and measures information (a circuit configuration for keeping the measurement data within the standard when the measurement data exceeds the standard). ,parts,
It is a terminal that receives and displays constants, countermeasures, attenuation, etc.). The engineer looks at the countermeasure information displayed on the information terminal 3 and changes the circuit configuration, parts, and constants of the device to be countermeasure 1, or replaces it with the component instructed by the countermeasure method, and measures the noise again. , Determine if it is within specifications. If it does not fit, again pass the measurement data to the system controller 4 and repeatedly receive the countermeasure information,
Repeat taking measures.

The system controller 4 is the device to be protected 1
Based on the noise measurement data of the
Is used to obtain the circuit configuration, parts, constants, countermeasure method, attenuation amount, etc. so as to be within the standard. Countermeasure information extraction processing 41 and countermeasure information determination processing 42
It is composed of etc. The obtained result is passed to the information terminal 3 as countermeasure information, displayed, and provided to the engineer.

The countermeasure information extraction processing 41 compares the noise measurement data measured from the countermeasure target device 1 with the instructed standard value, and extracts the frequency range and the attenuation amount that require countermeasures (see FIG. 7). (A), (a) of FIG. 11).

The countermeasure information determination processing 42 sets a circuit configuration for the frequency data (frequency range) and attenuation extracted by the countermeasure information extraction processing 41, determines a constant corresponding to noise, and calculates the calculated attenuation amount. Repeat the constants and circuit configuration of the next candidate until the above is satisfied (see FIG. 4), or set the countermeasure method and repeat the setting of the next candidate countermeasure method until the attenuation corresponding to noise is satisfied ( (See FIG. 10).

The countermeasure component database 5 is a database for obtaining the circuit configuration, components, constants, countermeasure method, attenuation, etc., which prevent noise measurement data from exceeding the standard value when the measured data exceeds the standard value. , Circuit configuration list 51, countermeasure component list 52, countermeasure component characteristic data 53,
It is composed of countermeasure method data 54 and the like.

The circuit configuration list 51 is for registering a list of circuit configurations, and is registered here in the order of priority (see FIG. 8). The countermeasure component list 52 is a list of components having the circuit configuration registered in the circuit configuration list 51 (see FIG. 9).

The countermeasure component characteristic data 53 is for registering the constants of the components registered in the countermeasure component list 52, and for registering the attenuation amount of the countermeasure method registered in the countermeasure method data 54 (see FIG. 9). ).

Next, the operation of the entire configuration of FIG. 1 will be described with reference to FIG. In FIG. 2, S1 measures noise. This is a noise measurement system 2 of FIG. 1, for example, a spectrum analyzer detects a voltage or a radio wave detected from the device 1 to be subjected to frequency analysis, and the frequency data is paired with the voltage (or electric field strength) at that time. , (B) of FIG. 7 or (b) of FIG. 11 is generated.

In step S2, it is determined whether the standard is satisfied. This is to compare the noise measurement data (frequency data and voltage / electric field strength pair at that time) measured in S1 with a standard value specified in advance, and to determine the standard value for all frequency data of the measurement data. Determine if you are satisfied. If YES, in all frequency data of the noise measurement data,
Since the standard value is satisfied, the process ends. On the other hand, in the case of NO, it is found that the measured data of noise does not satisfy the standard value, so that the noise countermeasure based on the information is taken in S3.

Based on the above, the measured data of noise from the device to be countered 1 is compared with the standard value, and when not satisfied, this measured data is passed to the noise analysis device side and analyzed by referring to the countermeasure component database 5. Then, countermeasure information is generated, the countermeasure information is received, and, for example, an L-type one-stage filter is mounted as a countermeasure in the countermeasure target device 1. Then, the noise measurement is repeated and repeated until the measured data satisfies the standard value.

Next, the operation of the noise analysis device side, to which the noise measurement data is passed from the noise measurement system side, will be described.
In S11 of FIG. 2, a countermeasure target is set. This sets, for example, a standard (standard code) for which measures are taken.

In step S12, noise data is input. This captures the measurement data of the noise measured in S1. In S13, a countermeasure method (component) is selected according to the noise. This will be described with reference to the countermeasure component database 5 as described later with reference to FIG. 3 and FIG. 4 (or FIG. 10).
Select a countermeasure (such as a filter (circuit configuration, parts, constants)) that prevents the measured value of noise from exceeding the standard at the frequency that exceeds the standard.

In step S14, countermeasure information is displayed. This causes the countermeasure component selected in S13 to be displayed on the display as shown in the lower right part of FIG. 4 (or the lower right part of FIG. 10), for example.

In step S15, it is determined whether to continue. This is S
The technician sees the countermeasure information displayed in 14, and the countermeasure target device 1
A countermeasure product (for example, a filter) is mounted on, and it is determined again whether or not there is an instruction to return to S11 and repeat. YES
In the case of, S11 and subsequent steps are repeated. If no,
finish.

As described above, the set countermeasure target (standard code) and the measured data from the countermeasure target device are taken in, the countermeasure component database 5 is referred to, and the frequency part exceeding the standard is prevented from exceeding the standard. The circuit configuration, components, and constants (or countermeasure method, attenuation amount) for obtaining the countermeasure information are displayed as countermeasure information, and the engineer who sees this displays the content instructed to the countermeasure target device 1 by the countermeasure information, for example, L type. Implement a one-stage filter. Then, the noise is repeatedly measured and confirmed again. If the noise measurement data exceeds the standard value, repeat again. The operation for selecting the circuit configuration, parts, and constants based on the noise measurement data will be described in detail below.

FIG. 3 shows an operation explanatory diagram of the present invention. This is a detailed flowchart of S11 to S14 of FIG. In FIG. 3, in S21, the standard code to be applied is input. For this, the engineer inputs the standard code in order to set the countermeasure target. By inputting this standard code, the frequency data and the voltage at that time are determined as shown in the standard data example of FIG. 6, for example.

In step S22, the noise measurement data is captured.
To do. This is the noise measurement data measured in S1 of FIG.
(See FIG. 5) In S23, a variable i = 0 is initialized. This is i = 0
To i = 1000, the frequency
Data f₀ Noise voltage V₀ To frequency data f ₁₀₀₀Miscellaneous
Sound voltage V₁₀₀₀This is to sequentially capture up to.

In step S24, the standard value is compared. This is the frequency data f _i of the measurement data and the voltage v _i (i = 0 to 10).
00)) and the frequency data f _Li of the standard value set in S21 and the standard voltage of the corresponding frequency of the standard voltage V _Li (i = 0 to 1000).

In step S25, it is determined whether the measured data is larger than the standard value. In the case of YES, the noise measurement data is larger than the standard value, and it is necessary to take measures.

In S26, i = i + 1 is set. In S27, it is determined whether the end. In the case of YES, that is, when i = 1000 and the comparison with the standard data is completed for all the measured data, the frequency range and the attenuation amount that require countermeasures are determined in S28. That is, based on the frequency data f and the voltage v stored as the data whose values are below the standard value in S25, the frequency range in which countermeasures are required and the voltage at the portion where the measured data (voltage) exceeds the standard are attenuated within the standard. The amount of attenuation necessary for this is determined (see ΔV in FIG. 7A). Then, the countermeasure information determination process after S31 in FIG. 4 is performed, and the countermeasure information (circuit configuration, parts, constants) is obtained and displayed. On the other hand, if NO in S27, S24 and subsequent steps are repeatedly executed for the next measurement data.

As described above, the standard data and the measured data are compared, the frequency range exceeding the standard value and the necessary attenuation amount are determined, and the countermeasure information determination process of FIG. 4 is started. Figure 4
FIG. 8 shows a flowchart for explaining the operation of the countermeasure information processing of the present invention.

In FIG. 4, S31 sets the circuit configuration. This is an L-shaped single stage, T
Type, π type, L type two stages, etc., circuit configurations are selected from the circuit configuration list 51 according to priority. For example, the first filter 1 (L-type one-stage filter) is taken out from the circuit configuration list 51 of FIG.

In step S32, the constant corresponding to the maximum noise is determined. As described on the right side, this selects a circuit component from the countermeasure component list 52 and reads constants (L, C) from the countermeasure component characteristic data 53. Specifically,
The component of the circuit configuration (for example, the filter 1) extracted from the circuit configuration list 51 of FIG. 8 is extracted as a component (for example, the common coil 1) from the countermeasure component list 52 of FIG. 9, and the component of the countermeasure component characteristic data 53 of FIG. Get a constant.

In step S33, the amount of attenuation is calculated. this is,
As described on the right side, the amount of attenuation is calculated from the circuit configuration (for example, L-shaped one stage) and the constant. S34 evaluates.

In step S35, it is determined whether it is good. This is S3
1, it is determined whether or not the attenuation amount calculated based on the circuit configuration, components and constants selected in S32 is larger than the attenuation amount required for the countermeasure determined in S28 of FIG. In the case of YES, the amount of attenuation required for the countermeasure is satisfied, so the countermeasure information is displayed in S36 as shown in the countermeasure information message on the right side. On the left side of the countermeasure information message, the circuit configuration selected in S31 (1 stage L type) is displayed in an easy-to-understand manner, and the components (L ₁ , C ₁ ) and their constants (3 mH, 4700 pF) are also displayed. To do. On the right side of the countermeasure information message, the noise measurement data is displayed as a bar graph and the standard value is displayed as a line graph. Here, the horizontal axis represents frequency and the vertical axis represents voltage. On the other hand, in the case of NO in S35, the attenuation amount necessary for the countermeasure cannot be obtained depending on the selected circuit configuration, parts, and constants, so S32 and the following steps are performed for the next parts and constants, and the next candidate is selected. Circuit configuration S31
Do the following and repeat to obtain the attenuation required for countermeasures.

By the above, the circuit configuration list 51, the countermeasure component list 52, and the countermeasure component specifying data 53 are set as the circuit configurations, components, and constants that satisfy the frequency range and the attenuation amount (S28 in FIG. 3) necessary for noise countermeasures. It is repeatedly searched and decided, and the decided countermeasure information is displayed as a countermeasure information message as shown in the lower right. The engineer who sees this countermeasure information message instructs the circuit configuration (L-type one-stage filter), parts (L ₁ is coil 1, C ₁ is capacitor 1),
An element (here, a filter) having a constant (3 mH, 4700 pF) is mounted on, for example, a power supply line of the device 1 to be protected,
Take measures against noise.

FIG. 5 shows an example of measurement data of the present invention. FIG. 5A is a schematic representation of measurement data. This is the measurement data obtained by frequency analysis (spectral analysis) of the noise detected from the device 1 to be protected by the noise measurement of S1 in FIG. Here, the horizontal axis represents frequency f and the vertical axis represents voltage (or electric field strength). The frequency f on the horizontal axis represents each frequency divided into ₁₀₀₀ from f ₀ to f ₁₀₀₀ .

FIG. 5 (b) shows the frequency f of FIG. 5 (a).
_i (i = 0 to 1000) and the voltage (electric field strength) at that time are expressed in pairs with v _i (e _i ) (i = 0 to 1000).

FIG. 6 shows an example of standard value data of the present invention.
FIG. 6A is a schematic representation of standard value data. This is the standard value data set by inputting the standard code applied in S21 of FIG. The horizontal axis represents frequency, and the vertical axis represents voltage (electric field strength).

FIG. 6B shows an example of standard value data. Here, # 1, ..., #n represent standard codes.
FIG. 6A is a schematic representation of the standard code # 1, in which a pair of frequency f _Li and standard value (voltage) V _Li (i = 0 to n) is registered as illustrated. It was done.

FIG. 7 shows a specific example of the measurement data of the present invention. FIG. 7A shows the relationship between the measurement data and the comparison value. Here, the measurement data is the noise measurement data captured in S22 of FIG. 3 (see FIG. 7B). The standard value is a standard value corresponding to the standard code set in S21 of FIG. 3 (see (c) of FIG. 7). Here, when the measured data is compared with the standard value, the measured data is larger than the standard value by ΔV _{10 at} the frequency f ₁₀ of, so that S in FIG.
If YES in 25, the frequency f ₁₀ and ΔV ₁₀ at this time are paired, and the data is stored as standard value broken data as shown in FIG. 7D.

FIG. 7B shows the measurement data. In the noise measurement data, the frequency f _i and the measurement data (voltage) v _i (i = 0 to 1000) are stored in pairs.

FIG. 7C shows standard value data. This corresponds to the setting of the standard code applied in S21 of FIG. 3, and the corresponding standard code # 1 is extracted from the standard data of FIG. 6B. When this standard value data is schematically displayed, it becomes as shown in the standard value of FIG.

FIG. 7 (d) shows standard value breaking data. This is the frequency f with the measurement data in S25 of FIG.
_This is data when the voltage v _{i of i} is larger than the voltage v _Li of the standard value f _Li . As shown in (a) of FIG. 7, when the measured data exceeds the standard value, the standard value break data is represented by a pair of the frequency at that time and the voltage value Δv _i exceeding the standard value. For example, in the case of FIG. 7A, it is saved as f ₁₀ and Δv ₁₀ .

FIG. 8 shows an example of the circuit configuration list of the present invention. This is a circuit configuration registered in advance in association with an identifier. Here, the identifier 1: the filter 1 (L-type one-stage filter) and the schematic expression are registered as the circuit configuration.

Similarly, the identifiers 2, 3, ... Are registered in advance. FIG. 9 shows an example of a countermeasure component list / countermeasure method data / component characteristic data of the present invention.

The countermeasure component list 52 is a list in which the elements of the circuit configuration (for example, the filter 1) in the circuit configuration list of FIG. 8 are registered in advance. For example, when the filter 1 is selected as the circuit configuration in the circuit configuration list of FIG. 8, for example, the common coil 1 is selected as L ₁ and the capacitor 1 is selected as C ₁ from the countermeasure component data 52 of FIG. Then, for example, the selected common coil 1 and capacitor 1 are configured by the LCR as shown in the figure.

The countermeasure component characteristic data 53 is obtained by previously registering the constants of the components in the countermeasure component list 52, as indicated by the dotted arrows. For example, the countermeasure parts list 52
The common coil 1, which is a component of the LCR, is configured by parallel connection of LCRs, and the values (constants) of these LCRs are La and C in the countermeasure component identification data 53 as indicated by the arrows.
It can be taken out as a and Ra (constant). Based on these extracted constants, the attenuation amount of the filter 1 of FIG. 8 is calculated (at this time, the attenuation amount of the constant whose attenuation characteristic matches the frequency of the maximum noise required for countermeasures is calculated). Further, the damping characteristics (f _max , Δv _max ) corresponding to the countermeasure method (for example, the bead core 1) of the countermeasure method data 54 are registered.

The countermeasure method data 54 is registered beforehand with the countermeasure method when the measured data of the electric field strength measured as noise, which will be described later, exceeds the standard value. Next, another electric field strength countermeasure information processing of the present invention will be described in detail with reference to FIGS. 10 and 11. Normally, the noise radiated from the device to be protected is measured at voltage of 30MHz or less
z and above are standards for measuring the electric field strength, and here are the cases of electric field strength. 2 and 3 are the same in the case of measuring with this electric field strength, the description thereof will be omitted.

FIG. 10 shows another flowchart for explaining the operation of the present invention. This is a flowchart corresponding to FIG. 4 in which noise is measured by voltage. In FIG. 10, S41
Selects the countermeasure method for the maximum noise. For this, as described on the right side, one countermeasure method with a high priority is extracted from the countermeasure method data 54.

In step S42, the amount of attenuation is calculated. These S4
In S1 and S42, one of the countermeasure methods data 54 shown in FIG. 9 having a high priority, for example, the first B-score 1 is taken out, and the countermeasure component characteristic data 5 corresponding to the B-score 1 is extracted.
The attenuation characteristic (f _max , Δv _max ) in 3 is taken out, and the attenuation amount is calculated.

In S43, the evaluation is performed. This is because the attenuation amount Δv _max of the countermeasure method calculated in S42 is larger than the electric field strength Δe _x exceeding the standard value as compared with the standard value in S24 of FIG. 3, and noise can be attenuated to the standard value. Or evaluate.

In S44, it is determined whether it is good. In the case of YES, the amount of attenuation required for the countermeasure is satisfied, so that the countermeasure information is displayed in S45 as shown in the countermeasure information message on the right side. Here, on the left side of the countermeasure information message, the countermeasure method (bead core 1) selected in S41 is displayed in an easy-to-understand manner, and the component name: B-core 1 and attenuation amount Δv _max are also displayed. On the other hand, in the case of NO in S44, another countermeasure method is searched for, and S41 and subsequent steps are repeated.

As described above, the countermeasure method satisfying the frequency range and the attenuation amount (S28 in FIG. 3) necessary for the noise countermeasure is determined by repeatedly searching the countermeasure method list 54 and the countermeasure component specifying data 53, and this is determined. The countermeasure information is displayed as a countermeasure information message as shown in the lower right. The engineer who sees this countermeasure information message mounts the countermeasure method (bead core 1) specified here and the element having the attenuation characteristic (the bead core 1 here) on the power supply line of the device 1 to be countermeasureed against noise. Give.

FIG. 11 shows a concrete example of other measurement data of the present invention.
Here is an example: FIG. 11 (a) shows the measured data and the comparison value.
Show the relationship. Here, the measurement data is acquired in S22 of FIG.
This is the measured noise data (see (b) in Fig. 7).
See). The standard value is the standard code set in S21 of Fig. 3.
It is the corresponding standard value (see (c) of FIG. 7). here
Is the frequency f of when comparing the measured data with the standard value._Ten
When, the measured data is Δe_TenOnly big
Therefore, the frequency f at this time _TenAnd Δe_TenFigure 1
As shown in 1 (d)
It

FIG. 11B shows the measurement data. In the noise measurement data, the frequency f _i and the measurement data (electric field strength) e _i (i = 0 to 1000) are paired and stored.

FIG. 11C shows standard value data.
In this case, the corresponding standard code #b is extracted from the standard data corresponding to the setting of the standard code to be applied. When this standard value data is schematically displayed, it becomes as shown in the standard value of FIG.

FIG. 11D shows the standard value break data. This is the electric field strength e _i of the frequency f _i of the measured data.
There is data is greater than the electric field strength e _Li standard value f _Li. As shown in (a) of FIG. 11, when the measured data exceeds the standard value, the standard value break data is represented by a pair of the frequency at that time and the voltage value Δe _i exceeding the standard value. For example, in the case of FIG. 11A, f ₁₀ and Δe ₁₀
Save as.

FIG. 12 shows a structural example of the apparatus of the present invention.
In FIG. 12, a noise reduction device 11 is a noise analysis device 12 that is a device that takes measures against noise such as air conditioners.
Is a device for performing noise analysis of the noise reduction device 11, and as shown in the figure, a device A for measuring the noise of the noise reduction device 11 and a measurement transferred from the device A via a telephone line or the like. It is composed of a device B that analyzes data and generates the countermeasure information described above.

The device A is, as shown in the figure, a spectrum analyzer 1 for analyzing the noise of the device 11 against noise.
3 and a computer 14 for transferring the noise generation level (measurement data) from the spectrum analyzer 13 to the device B via a telephone line or the like.

The spectrum analyzer 13 measures the noise of the noise reduction device 11 and displays the noise generation level on its own display. The computer 14 receives the notification of the noise generation level from the spectrum analyzer 13 and transfers it to the device B via a telephone line, or displays the noise generation level, information on noise countermeasure parts, and noise generation analysis on its own display. Display information such as results. Seeing this, the technician mounts a noise countermeasure product (for example, a filter) of the noise reduction countermeasure device 11 to suppress the generation of noise.

The device B is for generating countermeasure information based on the measurement data, and as shown in the figure, the countermeasure component database 5 and the hard disk 1 for storing various programs.
5 and a computer 16 that performs various processes.

As described above, the computer 16 uses the noise measurement data in the frequency range exceeding the standard value,
The attenuation value is determined, and the countermeasure product that satisfies this is determined. On the display of the computer 16, the noise generation level, noise countermeasure component information, noise generation analysis result information, noise analysis status information, etc. are displayed.

[0068]

As described above, according to the present invention,
When the noise measurement data measured from the device to be countermeasure is larger than the standard value, the database is searched and countermeasure components according to the noise (frequency range, voltage, electric field strength) (countermeasure method)
Is selected and stored within the standard value, and the countermeasure information at this time is displayed. Therefore, the noise countermeasure information of the device to be countermeasure can be quickly generated and displayed. This allows
It becomes possible for an engineer to look at the noise countermeasure information, mount a noise countermeasure component such as a filter on the device to be countermeasure, and take noise countermeasures in a short time.

[Brief description of drawings]

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

FIG. 2 is a flowchart explaining the overall operation of the present invention.

FIG. 3 is a flowchart for explaining the operation of the present invention.

FIG. 4 is a flowchart illustrating the operation of countermeasure information processing according to the present invention.

FIG. 5 is an example of measurement data of the present invention.

FIG. 6 is an example of standard value data of the present invention.

FIG. 7 is a specific example of measurement data of the present invention.

FIG. 8 is an example of a circuit configuration list of the present invention.

FIG. 9 is an example of a countermeasure component list / countermeasure method data / component characteristic data of the present invention.

FIG. 10 is a flowchart (electric field) for explaining another operation of the present invention.

FIG. 11 is a specific example (electric field) of other measurement data of the present invention.

FIG. 12 is a structural example of an apparatus of the present invention.

[Explanation of symbols]

 1: Countermeasure device 2: Noise measurement system 3: Information terminal 4: System controller 41: Countermeasure information extraction process 42: Countermeasure information determination process 5: Countermeasure component database 51: Circuit configuration list 52: Countermeasure component list 53: Countermeasure component characteristics Data 54: Countermeasure method data 11: Noise countermeasure device 12: Noise analyzer 13: Spectrum analyzer 14, 16: Computer 15: Hard disk

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Yoshihiro Mochizuki 5-36-1 Shimbashi, Minato-ku, Tokyo Fuji Electric Chemical Co., Ltd. (72) Inventor Atsushi Ishizuka 5-36-11 Shimbashi, Minato-ku, Tokyo Fuji Electrochemical Co., Ltd.

Claims (6)

[Claims] 1. A noise analysis device for noise analysis of a device under test, wherein the measured data of noise measured from the device under test is compared with an instructed standard value, and a frequency range and an amount of attenuation required for the measure are extracted. Information extraction processing (41) and the frequency range and attenuation extracted by this countermeasure information extraction processing (41), the circuit configuration is selected, the constant corresponding to noise is determined, and the attenuation amount calculated from these is satisfied. Until next time, a countermeasure information determination process (42) that repeats the next candidate constant and circuit configuration is provided, and the countermeasure information determination process (42) displays the circuit configuration and constants that satisfy the extracted frequency range and attenuation. A noise analysis device characterized by being configured as follows. 2. A circuit configuration list (51) for registering a circuit configuration list, a countermeasure component list (52) for registering components of the circuit configuration registered in the circuit configuration list (51), and a countermeasure component list (52). The countermeasure component characteristic data (53) for registering the constants of the components registered in 52) is provided, and the countermeasure information determination process (42) determines the circuit configuration list (5) for the frequency range and the attenuation amount required for the countermeasure.
One circuit configuration having a high priority is selected from 1), the component having the selected circuit configuration is extracted from the countermeasure component list (52), the constant of the component is extracted from the countermeasure component characteristic data (53), and the extraction is performed. Calculated the attenuation based on the constant
2) The countermeasure component characteristic data (53) and the circuit configuration list (51) are repeated for the next candidate, and the satisfied circuit configuration, components and constants are determined. Noise analyzer. 3. The noise analyzer according to claim 1, wherein the extracted frequency range and attenuation are a frequency range and a voltage attenuation amount. 4. A noise analysis device for noise analysis of a device to be countermeasure, comparing the measured data of noise measured from the device to be countermeasure and an instructed standard value, and extracting a necessary frequency range and attenuation amount. The information extraction processing (41) and a countermeasure method is set for the frequency range and attenuation extracted by the countermeasure information extraction processing (41), and the next candidate countermeasure method is set until the attenuation amount corresponding to noise is satisfied. A countermeasure information determination process (42) for repeating setting is provided, and the countermeasure information determination process (42) is configured to display a countermeasure method that satisfies the extracted frequency range and attenuation amount. Noise analysis device. 5. Countermeasure method data (54) for registering a list of countermeasure methods, and countermeasure part characteristic data (53) for registering the attenuation characteristic of the countermeasure method registered in this countermeasure method data (54) are provided. The countermeasure information determination process (42) determines the countermeasure method data (5) for the frequency range and the attenuation amount required for the countermeasure.
4) select one countermeasure method with a high priority, extract the attenuation amount of this selected countermeasure method from the countermeasure component characteristic data (53) above, and when not satisfied, countermeasure method data (54), countermeasure component characteristic data The noise analysis apparatus according to claim 4, wherein the noise analysis apparatus is configured to repeatedly determine a satisfying countermeasure method for the next candidate of (53). 6. The noise analyzer according to claim 4, wherein the extracted frequency range and attenuation are a frequency range and an electric field strength attenuation amount.