JP2005062097A - Vibration tester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To detect abnormal state of self and a test body at the initial step of a test. <P>SOLUTION: The tester comprises a vibration part 1a for vibrating the test body, a drive control means (for example, CPU8 and the like) and is a vibration tester 100 for conducting the vibration test of a test body. It also comprises a memory means (for example, RAM6)for storing reference data in which test pattern data of the vibration test of the test body and a reference transmission characteristics data of the vibrator in vibration test in accordance with the test pattern data are correlated. It also comprises a transmission characteristic gaining means (for example, CPU8 and the like) for gaining the transmission characteristic data of the vibration part when a vibration test is conducted by driving the vibration part with the drive control means based on the test pattern data. It also comprises a determining means (for example, CPU8 and the like) for determining abnormal state based on the transmission characteristic data obtained with the transmission characteristic gaining means and the abnormal state base on the reference transmission characteristic data stored in the memory means. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vibration test apparatus.

2. Description of the Related Art Conventionally, a vibration test apparatus that performs a vibration test on a specimen with a predetermined test pattern is known (for example, see Patent Document 1).
This vibration test apparatus is generally provided with a predetermined safety device, and automatically stops the vibration test apparatus when an abnormality or failure is detected. However, even if an initial failure of the vibration test apparatus has occurred, or even if, for example, a bolt that makes up the test apparatus main body is loosened at the initial stage of the test, the safety device detects these as an abnormality or failure. It is not. For this reason, the above-mentioned abnormality / failure is detected by an abnormal sound, a strange odor, abnormal heat generation or the like of the test apparatus being operated by the user.
JP 2003-114165 A

However, if the detection of abnormal conditions such as abnormalities and failures in the initial stage of the vibration test apparatus is left to the user's subjectivity, there is a problem that errors in detection or oversight occur, resulting in inaccuracy. is there. Furthermore, if the detection of an abnormal state is overlooked, there is a problem that the failure becomes serious and the maintenance cost increases.
Also, detection of abnormal conditions such as damage to the specimen is generally performed by visual inspection by the user, and it is difficult to accurately detect abnormal conditions.

  The subject of this invention is providing the vibration test apparatus which can detect the abnormal state of self and a test body in the initial stage of a test.

The invention of claim 1 is, for example, as shown in FIG.
A vibration test apparatus (100) that includes a vibration unit (1a) that vibrates the specimen and drive control means (for example, a CPU 8) that controls driving of the vibration part and performs a vibration test of the specimen. )
Storage means for storing reference data in which test pattern data of the vibration test of the specimen is associated with reference transfer characteristic data of the excitation unit in the vibration test according to the test pattern data (for example, the RAM 6) )When,
Transfer characteristic acquisition means (for example, CPU 8) for acquiring transfer characteristic data of the vibration exciter when the vibration control is performed by driving the vibration exciter by the drive control means based on the test pattern data;
Determination means (for example, CPU 8 or the like) for determining an abnormal state based on the transfer characteristic data acquired by the transfer characteristic acquisition means and the reference transfer characteristic data stored in the storage means;
It is characterized by having.

  According to the first aspect of the present invention, the transfer characteristic data of the vibration exciter when the vibration test is performed by driving the vibration exciter based on the test pattern data is acquired. Since the abnormal state can be determined based on the reference transfer characteristic data stored in the storage means, the abnormal state of the vibration test apparatus and the specimen can be accurately detected at the initial stage of the test. In other words, abnormal conditions such as initial abnormalities / failures of the vibration test apparatus and damage to the specimen are determined based on the transfer characteristic data and the reference transfer characteristic data without leaving the user's subjectivity, for example. It can be detected almost accurately without causing errors or oversights. Furthermore, even for a specimen that does not output a predetermined signal or the like that is a criterion for determining whether or not it is in an abnormal state, the abnormal state of the specimen should be detected based on the transmission characteristic data and the reference transmission characteristic data. Can do.

The invention according to claim 2 is, for example, as shown in FIG.
A vibration test apparatus (100) that includes a vibration unit (1a) that vibrates the specimen and drive control means (for example, a CPU 8) that controls driving of the vibration part and performs a vibration test of the specimen. )
Storage means for storing reference data in which test pattern data of the vibration test of the specimen is associated with reference transfer characteristic data of the excitation unit in the vibration test according to the test pattern data (for example, the RAM 6) )When,
Vibration data acquisition means (for example, CPU 8) for acquiring vibration data when a vibration test is performed by driving the excitation unit by the drive control means based on the reference transfer characteristic data;
Determination means (for example, CPU 8 or the like) for determining an abnormal state based on vibration data acquired by the vibration data acquisition means and test pattern data stored in the storage means;
It is characterized by having.

  According to the second aspect of the present invention, the vibration data when the vibration test is performed by driving the excitation unit based on the reference transfer characteristic data is acquired, and the acquired vibration data is stored in the storage means. Since the abnormal state can be determined based on the test pattern data, the abnormal state of the vibration test apparatus and the specimen can be accurately detected at the initial stage of the test. That is, abnormal conditions such as initial abnormalities / failures of the vibration test apparatus and damage to the specimen are determined based on vibration data and test pattern data, for example, without leaving it to the user's subjectivity. It can be detected almost accurately without causing an oversight. Furthermore, even for a specimen that cannot be output from the specimen as a predetermined signal, which is a criterion for determining the vibration state, the abnormal state of the specimen is detected based on the vibration data and test pattern data. It can be performed.

The invention according to claim 3 is the vibration test apparatus according to claim 1 or 2, for example, as shown in FIG.
It is characterized by comprising stop control means (for example, CPU 8 or the like) for stopping the vibration test when the determination means determines that the state is abnormal.

  According to the invention described in claim 3, it is of course possible to obtain the same effect as that of the invention described in claim 1 or 2, in particular, the vibration test is stopped when it is determined that the state is abnormal. Therefore, it is possible to prevent the failure at the initial stage of the vibration test apparatus from becoming larger. For example, the failure of the vibration test apparatus or the failure to detect the initial failure may cause a serious failure. It is possible to suppress an increase in maintenance cost due to the above.

In the vibration test apparatus according to any one of claims 1 to 3, for example, as shown in FIG.
An input unit (3) for inputting the test pattern data;
Reference transfer characteristic acquisition for acquiring reference transfer characteristic data of the excitation unit when a vibration test is performed by driving the excitation unit by the drive control unit based on the test pattern data input by the input unit Means (for example, CPU8 etc.);
Storage control means (for example, CPU 8 or the like) for storing the reference transfer characteristic data acquired by the reference transfer characteristic acquisition means and the test pattern data in the storage means as the reference data in association with each other;
It is characterized by having.

  According to the invention described in claim 4, it is natural that the same effect as that of the invention described in claims 1-3 can be obtained. In particular, the excitation unit is driven based on the input test pattern data. The reference transfer characteristic data of the vibration exciter when the vibration test is performed can be acquired, and the acquired reference transfer characteristic data and the test pattern data can be associated with each other and stored in the storage means as reference data. Based on the reference data, the vibration test of the specimen can be performed by driving the excitation unit.

  According to the invention described in claim 1, based on the transfer characteristic data and the reference transfer characteristic data, without leaving the abnormal state such as the initial abnormality / failure of the vibration test apparatus and the damage of the specimen to the subjectivity of the user, for example. Therefore, the abnormal state can be detected almost accurately without causing a detection error or an oversight. Furthermore, even for a specimen that does not output a predetermined signal or the like as a criterion for determining whether or not it is in an abnormal state, the abnormal state of the specimen should be detected based on the transfer characteristic data and the reference transfer characteristic data. Can do.

  According to the second aspect of the present invention, the abnormal state such as the initial abnormality / failure of the vibration test apparatus and the damage of the specimen is determined based on the vibration data and the test pattern data without leaving it to the subjectivity of the user, for example. Therefore, the abnormal state can be detected almost accurately without causing a detection error or an oversight. Furthermore, even for a specimen that cannot be output from the specimen as a predetermined signal, which is a criterion for determining the vibration state, the abnormal state of the specimen is detected based on the vibration data and test pattern data. It can be performed.

  According to the invention described in claim 3, since the vibration test is stopped when it is determined that the state is abnormal, it is possible to prevent the failure at the initial test stage of the vibration test apparatus from further increasing. For example, it is possible to suppress an increase in maintenance cost due to the failure becoming serious due to oversight of detection of failure or initial failure of the vibration test apparatus.

  According to the fourth aspect of the present invention, the acquired reference transfer characteristic data and test pattern data can be associated with each other and stored in the storage means as reference data. The vibration test of the specimen can be performed by driving the part.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. However, the scope of the invention is not limited to the illustrated examples.
FIG. 1 is a block diagram illustrating a configuration of a main part of a vibration test apparatus exemplified as a preferred embodiment to which the present invention is applied. FIG. 2 is a cross-sectional view of a vibration unit provided in the vibration test apparatus of FIG. is there.

  As shown in FIG. 1, the vibration test apparatus 100 includes an excitation unit 1 a, a vibration detection unit 2, an input unit 3, a power supply unit 4, a display unit 5, a RAM 6, a ROM 7, and a CPU 8. Each part is connected by a bus Y.

  As shown in FIG. 2, the vibration unit 1a includes an outer magnetic pole 1b, an inner magnetic pole 1c, an exciting coil 1d, a movable coil 1e, a vibration table 1f, an air spring 1g, a bearing 1h, a bolt 1i, and the like. .

The exciting coil 1d is excited by a direct current input from the power supply unit 4 to generate a direct magnetic field, and a direct current across the movable coil 1e is formed in a gap G between the outer magnetic pole 1b and the inner magnetic pole 1c, which are magnetic materials. A magnetic field is formed.
The movable coil 1e is supplied with an alternating current generated by a drive circuit (not shown), and the movable coil 1e vibrates in a direct current magnetic field formed in the gap G at a frequency based on the frequency of the alternating current. The movable coil 1e is fixed to a vibration table 1f supported by an air spring 1g installed in the inner magnetic pole 1c. When the movable coil 1e vibrates, the vibration table 1f is guided by a bearing 1h to be perpendicular. Vibrate.
The vibration unit 1a configured as described above is driven in accordance with a predetermined drive control signal input from the CPU 8 to vibrate the vibration table 1f.
And the vibration part 1a can vibrate a test body with the vibration of this vibration table 1f by vibrating the vibration table 1f to which the test sample (not shown) was attached via the volt | bolt 1i. .

  The vibration detection unit 2 is, for example, a well-known acceleration sensor or the like, detects a voltage signal output according to the vibration state of the vibration table 1f based on the excitation condition, and outputs the voltage signal to the CPU 8 as a detection signal.

The input unit 3 is used to set and input test pattern data for a vibration test of the specimen. For example, the input unit 3 includes operation keys (not shown) for excitation start / stop and condition setting. Various input signals corresponding to the input operation are output to the CPU 8.
Here, the test pattern data refers to data relating to various vibration conditions for defining a series of vibration tests of the specimen, for example, acceleration, vibration frequency, speed, displacement, acceleration time, etc. of the specimen. Among these conditions, data relating to a combination of one or a plurality of the above may be used.

  The power supply unit 4 includes, for example, a DC power supply and an AC power supply, and can supply a DC current or an AC current to the excitation unit 1a under the control of the CPU 8.

  The display unit 5 is configured by an LCD (Liquid Crystal Display) or the like, and based on a display control signal input from the CPU 8, for example, a test pattern data setting input screen, reference transfer characteristic data, transfer characteristic data, and vibration data A predetermined display screen related to the above or the like is displayed.

A RAM (Random Access Memory) 6 is, for example, a volatile semiconductor memory, and a work area for temporarily storing programs, input signals, data, and the like being processed by the CPU 8 and a storage area for storing results of various processes. Etc.
The RAM 6 constitutes storage means for storing reference data in which the input test pattern data is associated with the reference transfer characteristic data of the vibration unit 1a corresponding to the test pattern data.
Here, the reference transfer characteristic data is data related to the drive control amount that is set in correspondence with the test pattern data and controls the drive of the excitation unit 1a by the CPU 8. For example, preliminary vibration of the specimen In the test, data related to the current output level from the power supply unit 4 according to a predetermined frequency, which is necessary for driving the excitation unit 1a based on the test pattern data, can be mentioned.

  A ROM (Read Only Memory) 7 is a read-only memory, and stores application programs for various processes as the vibration test apparatus 100 executed by the CPU 8, data used for various operations, and the like. Specifically, the ROM 7 includes a vibration test control program 7a, a drive control program 7b, a reference transfer characteristic acquisition program 7c, a transfer characteristic acquisition program 7d, a vibration data acquisition program 7e, a storage control program 7f, a determination program 7g, and a stop control program. 7h etc. are memorized.

  A CPU (Central Processing Unit) 8 controls each component of the vibration test apparatus 100 in a unified manner, and is input from the input unit 3, a program designated from various programs stored in advance in the ROM 7. Various signals and data are developed in a work area in the RAM 6, various processes based on the input signals and data are executed according to the program, and the processing results are stored in the storage area of the RAM 6 and displayed on the display unit 5.

Further, the CPU 8 controls the driving of the excitation unit 1a based on the test pattern data input by the input unit 3 according to the vibration test control program 7a, and executes a vibration test of the specimen. Further, prior to the vibration test of the specimen, the CPU 8 executes a preliminary vibration test for controlling the drive of the vibration exciter 1a based on the test pattern data so as to preliminarily vibrate the specimen.
Here, in the vibration test and the preliminary vibration test, the CPU 8 controls a drive control amount such as an output level of a current from the power supply unit 4 to the excitation unit 1a according to the drive control program 7b as a drive control unit. Thus, the drive of the vibration exciter 1a is controlled.

  Further, the CPU 8 performs a preliminary vibration test of the specimen by driving the excitation unit 1a based on the test pattern data input by the input unit 3 according to the reference transfer characteristic acquisition program 7c as a reference transfer characteristic acquisition unit. The reference transfer characteristic data of the vibration exciter 1a is acquired. Further, the CPU 8 serves as storage control means in accordance with the storage control program 7f and associates the acquired reference transfer characteristic data with test pattern data of the vibration test of the specimen as reference data. Store in the storage area.

In the vibration test or the like, the CPU 8 performs feedback control for adjusting the drive control amount of the vibration unit 1a based on the detection signal output from the vibration detection unit 2 and input. As a result, the CPU 8 determines the current output level output from the power supply unit 4 to the excitation unit 1a based on the test pattern data in the reference data, for example, so that the specimen is vibrated at a substantially constant acceleration. The first vibration control for controlling can be executed.
Further, the CPU 8 controls the excitation unit 1a so as not to fluctuate the current output level corresponding to the frequency output from the power supply unit 4 based on the reference transfer characteristic data in the reference data. The second vibration control can be executed.

In the first vibration control described above, the CPU 8 drives the excitation unit 1a based on the test pattern data of the reference data stored in the RAM 6 according to the transfer characteristic acquisition program 7d as transfer characteristic acquisition means. Then, transfer characteristic data of the vibration exciter 1a when the vibration test of the specimen is performed is acquired.
Here, the transfer characteristic data is data related to the drive control amount for controlling the drive of the vibration exciter 1a by the CPU 8 according to the test pattern data. For example, in the vibration test of the specimen, the transfer characteristic data is based on the test pattern data. The data relating to the current output level from the power supply unit 4 according to a predetermined frequency necessary for driving the excitation unit 1a can be given.
Note that the transfer characteristic data is acquired, for example, at the start or end of a preset vibration test, or at an arbitrary timing.

  Further, in the first vibration control described above, the CPU 8 serves as a determination unit according to the determination program 7g, and the acquired transfer characteristic data of the excitation unit 1a and reference transfer characteristic data of the reference data stored in the RAM 6; Based on the above, the abnormal state of the specimen and vibration test apparatus 100 is determined.

Moreover, in said 2nd vibration control, CPU8 drives the vibration part 1a as vibration data acquisition means based on the reference | standard transfer characteristic data of the reference | standard data stored in RAM6 according to the vibration data acquisition program 7e. The vibration data of the specimen when the specimen is subjected to the vibration test is acquired. Specifically, for example, the CPU 8 acquires vibration data of the specimen based on a detection signal output from the vibration detection unit 2 according to the vibration state of the vibration table 1f.
Here, as the vibration data, for example, data relating to the acceleration, speed, displacement, etc. of the specimen according to a predetermined frequency can be cited.
The vibration data is acquired, for example, at the start or end of a preset vibration test or at an arbitrary timing.

  Further, in the second vibration control, the CPU 8 serves as a determination unit based on the acquired vibration data of the specimen and the test pattern data among the reference data stored in the RAM 6 according to the determination program 7g. The abnormal state of the specimen and vibration test apparatus 100 is determined.

  In addition, when the CPU 8 determines that the specimen and the vibration test apparatus 100 are in an abnormal state according to the suspension control program 7h as the suspension control means, the CPU 8 stops the vibration test of the specimen.

Next, a vibration test executed under the control of the CPU 8 will be described with reference to FIGS.
Here, FIG. 3 is a flowchart showing an example of the operation related to the vibration test of the specimen, and FIG. 4 is a diagram schematically showing an example of the test result of the vibration test in the normal state. FIG. 5 is a diagram illustrating an example of a test result of a vibration test in a case where an abnormal state of the vibration test apparatus 100 is schematically reproduced by pressing a bolt against a predetermined part of the vibration test apparatus 100. 4A and 5A are schematic diagrams of the vibration characteristics of the specimen in random vibration, and FIGS. 4B and 5B are outputs from the power supply unit 4 in random vibration. It is a schematic diagram of a current output level.

  As shown in FIG. 3, first, a specimen is attached to the vibration table 1f, and predetermined test pattern data is set and input via the input unit 3 based on the operation of a predetermined operation key by the user (step S3). S1) The CPU 8 outputs a predetermined control signal to the vibration unit 1a, and executes a preliminary vibration test for driving the vibration unit 1a to perform preliminary vibration of the specimen (step S2). Specifically, for example, as shown in FIG. 4, the CPU 8 determines that the specimen is substantially constant at a frequency in a band of 10 [Hz] to 2000 [Hz] that is randomly vibrated, which is defined by the test pattern data. Based on the detection signal from the vibration detector 2, the current output level from the power supply unit 4 is controlled to a predetermined magnitude so that it can be vibrated at a predetermined acceleration. The acceleration at this time is indicated by a broken line L1 in FIG. 4A, and the current output level is indicated by a solid line L2 in FIG. 4B.

  In the preliminary vibration test, the CPU 8 reads the reference transfer characteristic acquisition program 7c from the ROM 7, develops it in the RAM 6, and performs processing for acquiring the reference transfer characteristic data of the excitation unit 1a according to the reference transfer characteristic acquisition program 7c. Execute. Subsequently, the CPU 8 reads out the storage control program 7f from the ROM 7 and expands it in the RAM 6. In accordance with this storage control program 7f, the reference transfer characteristic data and the test pattern data of the vibration test of the specimen are associated with each other as reference data. It is stored in a predetermined storage area of the RAM 6 (step S3). Specifically, for example, the CPU 8 obtains data related to the current output level from the power supply unit 4 according to the frequency in the frequency band defined by the test pattern data in the range of 10 [Hz] to 2000 [Hz]. The data is stored in the RAM 6 as reference data in association with the test pattern data.

  Then, when the CPU 8 is instructed to start the vibration test of the specimen based on the operation of a predetermined operation key by the user (step S4), the CPU 8 reads the drive control program 7b from the ROM 7 and develops it in the RAM 6, The drive of the vibration excitation part 1a is controlled according to the drive control program 7b. Specifically, for example, in the first vibration control, the CPU 8 reads reference data from the RAM 6 and, based on the test pattern data, for example, vibrates the specimen so as to vibrate at a substantially constant acceleration. The current output level output from the power supply unit 4 to the unit 1a is controlled, or in the second vibration control, the reference data is read from the RAM 6 and based on the reference transfer characteristic data, the excitation unit 1a On the other hand, the current output level output from the power supply unit 4 is controlled so as not to fluctuate during the test.

Then, for example, at the start of the vibration test, the CPU 8 reads out the vibration data acquisition program 7e from the ROM 7 and expands it in the RAM 6 in the first vibration control, and supplies it during the vibration test according to the vibration data acquisition program 7e. In the process of acquiring vibration data relating to the vibration characteristics of the specimen or in the second vibration control, the transfer characteristic acquisition program 7d is read from the ROM 7 and expanded in the RAM 6, and the vibration is acquired according to the transfer characteristic acquisition program 7d. A process of acquiring transfer characteristic data of the vibration exciter 1a during the test is executed (step S5).
The acquired vibration data or transfer characteristic data is temporarily stored in a predetermined storage area in the RAM 6.

Subsequently, the CPU 8 reads out the determination program 7g from the ROM 7 and develops it in the RAM 6, and in accordance with this determination program 7g, the vibration data or transfer characteristic data acquired and the test pattern data of the reference data read out from the RAM 6 Alternatively, an abnormal state such as damage to the specimen and vibration test apparatus 100 is determined based on the reference transfer characteristic data (step S6). Specifically, in the first vibration control, the CPU 8 compares the difference in acceleration of the specimen according to the frequency based on the vibration data read from the RAM 6 and the test pattern data, or In the second vibration control, based on the transfer characteristic data read from the RAM 6 and the reference transfer characteristic data, the difference in the current output level from the power supply unit 4 according to the frequency is compared, and the difference is a predetermined value. When the level is higher than the level, it is determined that at least one of the specimen and the vibration test apparatus 100 is in an abnormal state.
Here, when the abnormal state is determined by the CPU 8, the reference level for the difference in the acceleration of the specimen and the difference in the current output level can be arbitrarily changed as appropriate by, for example, a user setting.

If it is determined in step S6 that the state is abnormal (step S6; Yes), that is, for example, in the first vibration control, as shown in FIG. 5A, a solid line corresponding to vibration data. The vibration characteristic indicated by L3 is different from the vibration characteristic indicated by the broken line L1 corresponding to the test pattern data by a predetermined level or more, or in the second vibration control, FIG. 5B corresponding to the transfer characteristic data. If the current output level indicated by the solid line L4 differs from the current output level indicated by the solid line L2 in FIG. 4B corresponding to the reference transfer characteristic data by a predetermined level or more, the CPU 8 determines that the abnormal state has occurred. Then, the process proceeds to step S7. In step S7, the CPU 8 reads out the stop control program 7h from the ROM 7, develops it in the RAM 6, and executes a process of stopping the vibration test of the specimen according to the stop control program 7h.
After that, for example, with the specimen removed from the vibration table 1f, the vibration test apparatus 100 is in an abnormal state due to damage or the like when the CPU 8 executes and controls the vibration test with the same contents as described above. Or whether it is a specimen. That is, when the vibration test is performed with the specimen removed, and the CPU 8 determines that the abnormality is present, the abnormality has occurred in the vibration test apparatus 100 and is determined not to be abnormal. This is because an abnormality has occurred in the specimen.

If it is determined in step S6 that the state is not abnormal (step S6; No), that is, in the first vibration control, the vibration characteristic corresponding to the vibration data is the vibration characteristic corresponding to the test pattern data. The difference between the current output level corresponding to the transfer characteristic data and the current output level corresponding to the reference transfer characteristic data is within the predetermined level in the second vibration control. If not, the CPU 8 proceeds to step S8 and continues the vibration test of the specimen.
Thereafter, the CPU 8 determines whether or not the acquisition of vibration data or transfer characteristic data is instructed at a predetermined timing during the vibration test (step S9). If the CPU 8 determines that the data acquisition is instructed (step S9; Yes), the CPU 8 proceeds to step S5 and controls the execution of the subsequent processing, while the data acquisition is not instructed. (Step S9; No), the process proceeds to step S10, the vibration test of the specimen is continued, and the vibration test is terminated according to the test end instruction.

As described above, according to the vibration test apparatus 100, the acquired reference transfer characteristic data and test pattern data can be associated with each other and stored in the RAM 6 as reference data.
In the first vibration control, the transmission characteristic data of the vibration unit 1a when the vibration unit 1a is driven by driving the vibration unit 1a based on the test pattern data is acquired, and the acquired transmission characteristic data The abnormal state of the specimen and the vibration test apparatus 100 is determined based on the reference transfer characteristic data stored in the RAM 6, or the excitation unit 1a is driven based on the reference transfer characteristic data in the second vibration control. The vibration data when the vibration test is performed can be acquired, and the abnormal state of the specimen and the vibration test apparatus 100 can be determined based on the acquired vibration data and the test pattern data stored in the RAM 6. Therefore, it is possible to accurately detect the abnormal state of the vibration test apparatus 100 and the specimen at the initial stage of the test. That is, the vibration test apparatus 100 does not leave the abnormal state such as initial abnormality / failure of the vibration test apparatus 100 and damage to the specimen, for example, to the user's subjectivity. Since the determination is based on the data and the test pattern data, the abnormal state can be detected almost accurately without causing a detection error or an oversight.
Furthermore, according to the vibration test apparatus 100, even if a specimen that does not output a predetermined signal or the like that is a reference for determining the vibration state is based on the transfer characteristic data and the reference transfer characteristic data, or the vibration data and the test pattern data. Thus, the abnormal state of the specimen can be detected.

  Further, when the CPU 8 determines that it is in an abnormal state, the vibration test of the specimen is stopped, so that the failure of the vibration test apparatus 100 at the initial test stage can be prevented from becoming larger. It is possible to suppress an increase in maintenance cost due to the failure becoming serious due to oversight of detection of failure or initial failure of the vibration test apparatus 100.

The present invention is not limited to the above embodiment, and various improvements and design changes may be made without departing from the spirit of the present invention.
For example, the acquisition timing of vibration data or transfer characteristic data is not limited to the start of the vibration test described above, but at any timing during the vibration test such as the end of the vibration test or an arbitrary set timing. There may be. For example, the abnormal state is determined at a substantially constant timing from the start to the end of the vibration test of the specimen, and various parameters such as the vibration time and the vibration state when it is determined to be an abnormal state In the subsequent vibration test of substantially the same specimen, it is possible to estimate when the specimen and the vibration test apparatus 100 are in an abnormal state based on the obtained various parameters. It becomes possible.

  In the above embodiment, the reference data in which the test pattern data and the reference transfer characteristic data are associated is stored in the RAM 6. However, the present invention is not limited to this, and the reference data is stored in advance in a nonvolatile manner. Of course, it may be configured to be stored in the storage unit. This eliminates the need to re-acquire the reference transfer characteristic data in the vibration test of the specimen substantially the same as the previous test, and makes it possible to perform the vibration test more simply.

  Further, in the above embodiment, the CPU 8 determines that the specimen and the vibration test apparatus 100 are in an abnormal state, but the vibration test of the specimen is stopped. However, the present invention is not limited to this. For example, the configuration may be such that a predetermined notification means (for example, a display unit, a voice output unit, or the like) notifies the user that the user is in an abnormal state. Specifically, by connecting the vibration test apparatus 100 to a terminal device such as a PC via a predetermined communication network such as Ethernet (registered trademark) or LAN, the user can perform the vibration test in a continuous durability test, for example. Even in a situation where the test apparatus 100 is not always present, an abnormal state can be notified by a display unit, an audio output unit, or the like provided in the terminal device.

It is a block diagram which shows the principal part structure of the vibration test apparatus illustrated as suitable embodiment to which this invention is applied. It is sectional drawing of the vibration part with which the vibration test apparatus of FIG. 1 is equipped. 2 is a flowchart showing an example of an operation related to a vibration test of a specimen by the vibration test apparatus of FIG. It is the figure which showed typically an example of the test result of the vibration test of FIG. It is the figure which showed an example of the test result at the time of reproducing typically the abnormal state of a vibration test apparatus in the vibration test of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Vibration test apparatus 1a Excitation part 3 Input part 6 RAM (memory | storage means)
8 CPU (drive control means, reference transfer characteristic acquisition means, transfer characteristic acquisition means, vibration data acquisition means, determination means, stop control means, storage control means)

Claims (4)

In a vibration test apparatus that includes a vibration unit that vibrates the specimen, and a drive control unit that controls driving of the vibration part, and performs a vibration test of the specimen.
Storage means for storing reference data in which test pattern data of the vibration test of the specimen is associated with reference transfer characteristic data of the excitation unit in the vibration test according to the test pattern data;
Transfer characteristic acquisition means for acquiring transfer characteristic data of the excitation unit when the vibration control is performed by driving the excitation unit by the drive control unit based on the test pattern data;
Determining means for determining an abnormal state based on the transfer characteristic data acquired by the transfer characteristic acquiring means and the reference transfer characteristic data stored in the storage means;
A vibration test apparatus comprising: In a vibration test apparatus that includes a vibration unit that vibrates the specimen, and a drive control unit that controls driving of the vibration part, and performs a vibration test of the specimen.
Storage means for storing reference data in which test pattern data of the vibration test of the specimen is associated with reference transfer characteristic data of the excitation unit in the vibration test according to the test pattern data;
Vibration data acquisition means for acquiring vibration data when a vibration test is performed by driving the excitation unit by the drive control means based on the reference transfer characteristic data;
Determination means for determining an abnormal state based on vibration data acquired by the vibration data acquisition means and test pattern data stored in the storage means;
A vibration test apparatus comprising: The vibration test apparatus according to claim 1 or 2,
A vibration test apparatus comprising stop control means for stopping the vibration test when the determination means determines that an abnormal state has occurred. In the vibration testing apparatus according to any one of claims 1 to 3,
An input unit for inputting the test pattern data;
Reference transfer characteristic acquisition for acquiring reference transfer characteristic data of the excitation unit when a vibration test is performed by driving the excitation unit by the drive control unit based on the test pattern data input by the input unit Means,
Storage control means for storing the reference transfer characteristic data acquired by the reference transfer characteristic acquisition means and the test pattern data in the storage means in association with each other;
A vibration test apparatus comprising:

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