JPH07140036A - Method and equipment for vibration test in special environment - Google Patents

Abstract

PURPOSE:To provide a method and equipment for vibration test of a sample in special environment, e.g. high temperature or high humidity, in which a vibration pattern detector for the sample is not required to be operated in the special environment. CONSTITUTION:Vibration pattern of a vibration table 2 coupled with a shaker 1 is detected while vibrating a sample 20 mounted in a predetermined vibration pattern with a normal environment being sustained and the detected vibration pattern is stored in a memory 10. The shaker 1 is then controlled such that the vibration pattern of the table 2 matches the vibration pattern stored in the memory 10 while sustaining the sample 20 in a special environment. In this regard, first and second switching means 11, 12 realize highly efficient vibration test.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration test method and a device therefor under a special environment such as high temperature and high humidity.

[0002]

2. Description of the Related Art A conventional vibration testing device in a special environment is shown in FIG.
As shown in FIG. 3, the vibrator 1, the vibration table 2 coupled to the vibrator 1, and the sample holder 4 mounted on the vibration table 2 via columns 3 are provided. A chamber 5 for forming a special environment so as to surround the sample holder 4
Is provided. This special environment forming chamber 5
Is a constant temperature bath, for example. Further, the detector 6 for detecting the vibration pattern of the specimen 20 on the specimen holder 4 is compared with the detection signal from the detector 6 and the setting signal from the setting device 7 to compare the vibration pattern of the specimen 20. And a vibration control device 8 for controlling the vibration exciter 1 so as to obtain a desired set vibration pattern.

In a conventional vibration test in a special environment using such a test apparatus, a required vibration pattern is set based on a detection signal from the detector 6 while the specimen 20 is kept in a special environment such as under high temperature. Was operated to become. The vibration test is, for example, a sweep endurance test (a test in which 1 G is constant and 10 to 150 Hz is performed in 10 cycles).

[0004]

However, in the conventional vibration test method in the special environment and the apparatus therefor as described above, it is necessary to use a detector that can withstand the environment depending on the required special environment. There are problems, and in some cases it is possible that no detector is guaranteed to operate in the required special environment. The present invention is intended to solve such a problem, and in a state where the specimen is kept in a special environment, a special detector is used without detecting a test pattern of the specimen itself. It is a voluntary purpose to provide a vibration test method in a special environment and a device therefor, which enables a required vibration test to be performed in a special environment by indirectly detecting a vibration pattern by another detector outside the environment. To do.

[0005]

In order to achieve the above-mentioned object, a vibration test method in a special environment according to the present invention is such that a test piece is vibrated while being kept in a special environment on a vibration table connected to a vibration exciter. When performing a test, the vibration pattern of the vibration table is detected and stored in a storage device while vibrating in the required vibration pattern while keeping the test object in a normal environment beforehand, and then the test sample is stored in a special environment. By controlling the vibration exciter so that the vibration pattern of the vibration table becomes the same as the vibration pattern stored in the storage device while keeping it under, a vibration test is performed on the specimen with the required vibration pattern. The feature is to do.

Further, the vibration testing device in a special environment of the present invention comprises a vibrating machine, a vibration table coupled to the vibrating machine,
The test piece pedestal mounted on the vibration table via the support, the special environment forming chamber surrounding the test piece pedestal, and the vibration pattern of the test piece on the test piece pedestal The first detector for detecting, the second detector for detecting the vibration pattern of the vibration table, and the detection signal from the first detector are compared with the setting signal from the setting device to detect the sample. The vibration control device controls the vibration exciter so that the vibration pattern becomes a required set vibration pattern, and a storage device that receives the detection signal from the second detector and stores the detection signal, and further includes the vibration. First switching means for the control device to selectively receive the detection signals from the first and second detectors, and the vibration control device to select the output signals from the setting device and the storage device. Received It is characterized in that a second switching means.

[0007]

In the above-mentioned vibration test method and apparatus for a special environment of the present invention, the vibration controller controls the setting signal from the setting device and the vibration pattern of the test object itself while the test object is kept in a normal environment. Is compared with the detection signal from the first detector to detect the vibration, and the vibrator is controlled so that the vibration pattern of the specimen becomes the required set vibration pattern, and the vibration pattern of the vibration table is changed to the second vibration pattern. Is detected by the detector and stored in the storage device. Then, with the above specimen kept in a special environment,
The vibration control device compares the output signal from the storage device with the detection signal from the second detector, and the vibration pattern of the vibration table becomes the same as the vibration pattern stored in the storage device. Thus, the action of controlling the vibration exciter is performed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An apparatus used for a vibration test method in a special environment as an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view of an apparatus used for the vibration test method in a special environment. As shown in FIG. 1, the vibration testing device in a special environment of the present embodiment includes a vibration exciter 1 and a vibration table 2 coupled to the vibration exciter 1, and the vibration table 2 is provided on the vibration table 2. The sample holder 4 is attached via the column 3.

A chamber 5 for forming a special environment is provided so as to surround the sample receiving table 4, and a first detector 6 for detecting a vibration pattern of the sample 20 on the sample receiving table 4 is provided as the sample. It is equipped with 20 while the vibrating table 2
A second detector 9 for detecting the vibration pattern of the vibration table is provided above. The special environment forming chamber 5 is, for example, a thermostat, and the special environment may be high temperature, high humidity, salt spray, gas radioactivity, electromagnetic field, or the like. Further, a setting device 7 for setting a required vibration pattern is provided, and the vibration signal of the test piece 20 is compared by comparing the setting signal from the setting device 7 and the detection signal from the first detector 6. Vibration control device 8 for controlling the vibration exciter 1 so as to obtain a required set vibration pattern
Is provided.

Further, there is provided a storage device 10 which receives the detection signal from the second detector 9 and stores it. Further, the vibration control device 8 has the first switching means 11 for selectively receiving the detection signals from the first detector 6 and the second detector 9, and the vibration control device 8 also has the setting device 7 and Second switching means 12 for selectively receiving each output signal from the storage device 10 is provided.

Next, a method of conducting a vibration test in a special environment using the apparatus having the above-mentioned structure will be described. First, while the specimen 20 is kept in the chamber 5 in a normal environment in advance, the vibration controller 8 causes the first detector 6
The shaker 1 is controlled so that the vibration pattern of the test piece 20 becomes a required vibration pattern by comparing the detection signal from the setting device 7 with the setting signal from the setting device 7. Then, in this state, the vibration pattern of the vibration table 2 is detected by the second detector 9,
This is stored in the storage device 10. At this time, the first switching means 11 is connected to the first detector 6 side as shown by the broken line, and the second switching means 12 is connected to the setting device 7 side as shown by the broken line.

Next, the specimen 20 is kept in a special environment by the special environment forming chamber 5. At this time, the first detector 6 is removed from the sample 20 and placed outside the special environment forming chamber 5. Then, in this state, the vibration control device 8 stores the detection signal from the second detector 9 in the storage device.
The vibration exciter 1 is controlled so that the vibration pattern of the vibration table 2 becomes the same as the vibration pattern stored in the storage device 10 as compared with the output signal from 10. As a result, the test piece 20 undergoes the vibration test with the required vibration pattern. At this time, the first switching means 11 is connected to the second detector 9 side as shown by the solid line, and the second switching means 12 is connected.
Is connected to the storage device 10 side as shown by the solid line.

As described above, according to the vibration test method in the special environment of the present embodiment, the vibration test under the special environment can be performed under the special environment (high temperature, high humidity, salt spray, special gas atmosphere, radioactivity, The desired vibration pattern can be achieved without using a special detector whose operation is guaranteed by the electromagnetic field). Further, according to the vibration testing apparatus in the special environment of the present invention, the test of the above method can be efficiently and accurately performed by the first and second switching means.

[0014]

As described above in detail, according to the vibration test method in the special environment of the present invention, a preliminary vibration experiment is first performed in a normal environment, and based on the experiment, indirectly in the special environment. In order to vibrate the test piece of, the required vibration pattern can be obtained without using a special detector whose operation is guaranteed in its special environment (high temperature, high humidity, salt spray, special gas atmosphere, radioactivity, electromagnetic field). The effect that a vibration test in a special environment can be performed is obtained. Further, according to the vibration testing apparatus in the special environment of the present invention, there is an effect that the vibration testing method in the special environment of the present invention can be efficiently and accurately performed by using the first and second switching means. .

[Brief description of drawings]

FIG. 1 is a schematic view of an apparatus used for a vibration test method in a special environment as an embodiment of the present invention.

FIG. 2 is a schematic view of an apparatus used for a conventional vibration test method in a special environment.

[Explanation of symbols]

 1 shaker 2 vibration table 3 column 4 sample holder 5 special environment forming chamber 6 detector 7 setting device 8 vibration control device 9 detector 10 storage device 11 first switching means 12 second switching means 20 supply Sample

Claims (2)

[Claims] 1. When performing a vibration test while a specimen is kept in a special environment on a vibration table connected to an exciter, the specimen is vibrated in a required vibration pattern while being kept in a normal environment in advance. While the vibration pattern of the vibration table is detected, the vibration pattern of the vibration table is stored in the storage device, and then the vibration pattern of the vibration table is the same as the vibration pattern stored in the storage device while keeping the specimen under the special environment. A vibration test method in a special environment, characterized in that a vibration test is performed on the sample under the above-mentioned required vibration pattern by controlling the vibration exciter so that 2. A vibrating machine, a vibrating table coupled to the vibrating machine, a sample holder mounted on the vibrating table via columns, and provided so as to surround the same. A chamber for forming a special environment, a first detector for detecting the vibration pattern of the sample on the sample holder, a second detector for detecting the vibration pattern of the vibration table, and the first A vibration control device for controlling the vibration exciter such that the detection signal from the detector is compared with the setting signal from the setting device so that the vibration pattern of the sample has a required setting vibration pattern; A first switch for receiving a detection signal from the detector and storing the same, and for allowing the vibration control device to selectively receive each detection signal from the first and second detectors. Means and the vibration control device And a second switching means for selectively receiving the respective output signals from the setting device and the storage device, and a vibration testing device in a special environment.