JP3537734B2 - Vibration environment combined test equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration environment combined test having a constant temperature bath capable of imparting desired environmental conditions to a test object by an air conditioner and a vibration generator capable of applying vibration to the test object. The apparatus is advantageously used as a dedicated machine for performing a composite test by simultaneously giving vibration and environmental conditions to parts of an automobile or an aircraft.

[0002]

2. Description of the Related Art A conventional vibration environment composite test apparatus is used to facilitate the work of maintenance of a vibration generator and to simultaneously use a vibration generator and a thermostat independently.
For example, as disclosed in Japanese Patent Publication No. 54890/1990, a separation type device is used so that the vibration generator and the thermostat can be easily separated.

[0003] However, such a separation type apparatus has a structure in which a bottom portion 33 of a constant temperature bath is cut out widely and up to a door contact surface, as seen in the above-mentioned conventional example. A structure for closing the lid 8, a bottom lid elevating and lowering supporting structure including its bearing shaft 8b and the like, a bottom lid elevating and lowering mechanism including an eccentric cam and the like, a constant temperature bath moving supporting structure and a moving rail 5,
A space or the like for movement is provided, and the apparatus is extremely complicated, large, and requires a large installation space for separation. In addition, there is a problem that extra sealing portions are generated between the wide bottom lid 8 and the bottom surface and the inner surface of the door, and the sealing tends to be defective.

[0004] Further, although not explicitly stated in the above publication,
The vibrator was usually cooled by a blower, and the blower made noise around. Further, the operation control panel for the thermostat and the operation control panel for the vibrator are separately provided, which is expensive and inconvenient in operation.

[0005]

On the other hand, in recent years, applications dedicated to combined vibration / environment tests for parts of automobiles and aircraft have been increasing. That is, for such parts,
Rather than conducting vibration tests alone, there is a growing demand for tests that provide some severe environmental conditions at the same time as vibration, and that when parts have defects, they can be manifested earlier and that such parts can be eliminated. I have. It is also possible to make the vibration generator maintenance-free and to improve the workability at the time of maintenance. In particular, in the newly developed air bearing type vibrator,
The need to separate the vibrator from the thermostat for maintenance is completely eliminated because there are no parts that need to be replaced in a relatively short time, such as oil seals in oil bearing type devices. .

Accordingly, the present invention solves the above-mentioned problems in the prior art, and provides a vibration environment composite test apparatus which has a simple structure, does not require a large installation space, has good sealability, has low noise, and has good operability. The task is to provide.

[0007]

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention is directed to a thermostat having an air conditioner capable of imparting a target environmental condition to a device under test and the device under test. In a vibration environment combined test apparatus having a vibration generator capable of adding vibration to the vibration chamber, the constant temperature bath and the vibration generator are installed so as to maintain a fixed relational position, and the vibration generator is a cylinder. A vibrating body having a shape capable of applying vibration to the test object, a guiding space for guiding the vibrating body to be vibrable, and a supporting space for supporting the vibrating body. In the cylindrical wall of the vibrator
Top and support guide member provided so as to form between the surface and the head internal surface, and the guide space and the compressed gas supply means capable of supplying compressed gas to the support space portion, the vibrating body
Accommodate a coil that generates a magnetic field so that it vibrates downward.
Main body and cover for covering the main body and its upper part
Between the cover and the upper end of the vibrating body.
And an internal seal, wherein the thermostatic oven is
Enclosed in an insulated casing to form a test chamber
And introduce the vibration generator into the test chamber
Cut out the bottom of the heat insulating casing
Having an interposition between a side surface of the cover and an end surface of the notch.
Mounted external seal, and the external seal
A top attached to the top of the cover and the top of the bottom
And a part seal .

[0008]

In addition to the features of the first aspect of the present invention, a vibration environment
The composite test apparatus includes a refrigerator that forms a part of the air conditioner so that the environmental condition includes a low temperature condition and can apply the low temperature condition, and a vibration generator that is installed near the refrigerator. It can be configured to have a blower that can be cooled and a soundproof member provided to reduce noise during operation of the refrigerator and the blower .

[0010] Also, in addition to the features of the invention of claim 1, together the air-conditioning operation unit and the vibrating operation section and the air-conditioning device operable air-conditioning operation unit and the vibration generating device operable vibration operation unit And an operation device provided so as to be provided in a specific manner .

[0011]

FIG. 1 shows an example of the overall configuration of a vibration environment composite test apparatus (hereinafter, referred to as a "composite test machine") to which the present invention is applied. The composite testing machine is a thermostatic chamber 1 that can apply temperature and humidity conditions to be tested as target environmental conditions to a sample W as an object to be tested by an air conditioner, and a vibration generator that can apply vibration to the sample W. This is a device having a vibrator 2 and installed such that the constant temperature bath 1 and the vibrator 2 maintain a fixed relational position as described below.

The thermostat 1 is surrounded by a heat insulating casing 11, and is divided into a test room 12 and an air conditioning room 13 separated by a partition plate.
It has. The vibrator 2 is arranged below the test room 12, and the operation control panel 4 and the machine room 5 are arranged on both sides of the thermostat 1. The operation control panel 4 is shown below for convenience of illustration. Since the thermostatic chamber 1 is combined with the lower vibrator 2, it is above the installation surface 100, one end of which is supported on the installation surface 100 by the lower support 6 formed of a frame and a panel structure, and the other end is a machine. It is supported by being connected to the chamber 5.

The lower support 6 and the machine room 5 are mounted on the mounting surface 100 by mounting feet 6a and 5a, respectively. In this way, the thermostat 1 is installed at a fixed position on the installation surface 100. In addition, installation foot 6a,
5a may be of a height-adjustable type. The lower portion of the thermostatic bath 1 is surrounded by the outer supporting plates 7 and 8 including the back side, together with the lower support 6. Inside these members, so as to reduce the noise generated by the vibrator 2,
Although not shown, a sponge-like sound-absorbing material is attached as in the machine room 5 as described later. Reference numeral 34 denotes an adjustable installation foot that allows the height of the vibrator 2 to be adjusted.

An air-conditioning chamber 13 of the thermostat 1 has a heater 14, a humidifier 15, and an evaporator 16 supplied with a refrigerant from a refrigerator unit 16 disposed in the machine room 5.
a, a blower 17 that circulates air-conditioned air driven by a motor 17a as shown by an arrow, and the like. Temperature and humidity conditions up to low temperatures. The humidifier 15 may be a humidifying dish type, but in this example, a boiler portion for generating steam is arranged below the air conditioning room 13 and the generated steam is supplied from below to the air conditioning room 13.
To diverge.

The test chamber 12 is provided with a temperature sensor 18 and a humidity sensor 19 at the position where the air is blown out, and the temperature and humidity conditions are automatically adjusted so that the temperature and humidity measured by these become the set values. It is a matter of course that the temperature and humidity conditions may be different from those described above, or an apparatus that applies only vibration and a temperature environment may be used. The sample W is placed on a sample table 12a connected to a vibration table described later.

The operation control panel 4 is a common operation device provided so as to integrally include a power unit 41, a master unit 42, and a power supply control unit 43 for the vibrator 2 and an air conditioning operation unit 44a and a vibration operation unit 44b. And a temperature / humidity vibration control recording unit 44. In the air-conditioning operation unit 44a, setting of temperature and humidity, setting of a test cycle, and the like can be performed. The vibration operation unit 44b can set the frequency and acceleration of vibration, and the like. Each operation unit may be operated using one operation screen display unit.

The operation control panel 4 is arranged adjacent to or at a distance from the constant temperature bath 1 or arranged side by side, or in some cases in an L-shape. It has the same mounting feet 4a as the thermostat. The thermostat 1 and the vibrator 2 are connected by a cable 45.

The machine room 5 has a structure of a frame and a panel 51 for covering the frame. The machine room 5 includes the refrigerator unit 16 and a vibrator provided in the vicinity of the refrigerator unit 16 in this embodiment in the same machine room. Cooling blower 20, heating control device 14
a, a humidification control device 15a, a refrigeration circuit control device 16b, an intake pipe 32 for sucking air that has cooled the vibrator 2 as will be described later, and other mechanical and electrical components.
On the indoor side of the panel 51, a sponge-like sound absorbing material 5 as a soundproof member provided so as to reduce noise to the outside when the refrigerator unit 16 and the blower 20 are operated.
2 is pasted.

FIG. 2 shows a structural example of the vibrator 2. The vibrator 2 is an air bearing type having a newly developed new structure and is advantageously applied to the present invention. The vibrator 2
Vibration table 2 which is a vibrating body capable of applying vibration to sample W
1. A cylinder 22 as a support and guide member, and a compressed air supply system in a factory of 5 × pressure
A compressed air pipe 23 provided to supply compressed air of about 10 ⁵ Pa is provided. The cylindrical body 22 forms between the vibration table 21 and a peripheral gap 22a which is a guide space for guiding the vibration table 21 so as to be able to vibrate and an upper air chamber 22b which is a support space for supporting the vibration table 21. It is provided as follows.

The vibration table 21 is provided with the above-mentioned peripheral gap 22a.
And the upper air chamber 22b is formed in a cylindrical shape, and a plurality of radial sheets (in this example, 8
An intermediate plate 21a is integrally formed, and a coupling member 21b for attaching the sample stage 12a also shown in FIG. The cylinder 22 has an air supply passage 22c to which the compressed air pipe 23 is connected, and a large number of air holes 2 formed so as to communicate with the peripheral gap 22a.
2d, an air discharge passage 22e for discharging the compressed air supplied to the upper air chamber 22b, and the like are formed. The air discharged from the air discharge passage 22e is taken out by a pipe (not shown), and is discharged to the outside air via a regulating valve. In addition, when there is no compressed air supply equipment at the factory where the present composite testing machine is installed, a compressor dedicated to the vibrator is provided.

The vibration generating portion of the vibrator 2 includes a driving coil 24 attached to an intermediate plate 21a of the vibration table 21,
The upper and lower excitation coils 25 and 26 for generating a magnetic field so as to vibrate the drive coil 24 in the vertical direction, the main body 27 containing these coils, and the main body 27 and the intermediate plate 21a are connected to each other to supply power to the drive coil 24. Power supply mechanism 28,
Similarly, a detent mechanism 29 of a vibration table having a detent plate 29a attached to the main body 27 and the intermediate plate 21a and a roller 29b rotatably supported in contact with the detent plate 29a, is mainly incorporated to cool coils. It comprises an air passage 30, an exhaust port 31, and a flexible intake pipe 32 also shown in FIG. The lower part of the cylindrical body 22 is fitted into the main body 27 and fixed to the main body with bolts 33.

FIG. 3 shows a structure of a combination part of the thermostat 1 and the vibrator 2. The thermostat 1 has the installation surface 100 as described above.
, And is maintained at a fixed position. The arrangement-related members of the vibrator 2 are arranged on the installation surface 100 in a fixed positional relationship with respect to the constant temperature bath 1, and are provided between the adjustable installation foot 34, the support 35, and the main body 27 shown in FIG. Notch end face 11a at the bottom of heat insulating casing 11 opened for introducing vibration isolator 36, body 27 and cover 27a covering the upper part thereof and vibrator 2 into a thermostat.
External seal packing 37, cover 2 interposed between
Internal seal gasket 38 for sealing between 7a and the upper end portion of vibrating table 21, upper seal 39 made of silicone cloth provided to more completely prevent water leakage into the vibrator, and bottom seal 39 11b and a stopper plate 40 for fixing the cover 27a with screws or the like.

With such a structure, the vibrator 2 is firstly adjusted in a planar installation position with respect to the thermostatic bath 1 and a height position by the adjustable mounting feet 34, and thereafter maintained in that state, and maintained. It is not separated from the thermostat 1 for separate use with the thermostat or the thermostat.

The above-described composite testing machine is operated as follows and exhibits its operational effects. The sample W to be tested is fixed and attached to the sample table 12a, the thermostat 1 and the vibrator 2 are operated, and the sample W is subjected to a predetermined vibration under predetermined temperature and humidity conditions to perform a composite test. In the operation of the vibrator 2, before the drive coil 24 and the excitation coils 25 and 26 are operated, the surrounding gap 2 is removed from the compressed air pipe 23 via an automatic valve or the like.
Compressed air is introduced into the upper air chamber 2a and the upper air chamber 22b, and the vibration table 21 is pneumatically supported so as to be substantially at the center of the amplitude. Note that the amount of air discharged from the air discharge passage 22e is adjusted in advance by an adjusting valve or the like so as to achieve such a support state.

The operation control of the thermostat 1 and the vibrator 2 are all performed by the operation control panel 4, and the temperature / humidity condition, frequency, acceleration and the like given to the sample W are controlled by the temperature / humidity vibration control recording unit of the operation control panel 4. 44. Therefore,
By having a structure in which the thermostatic chamber and the vibrator are integrated and held as in the present invention, there is no need to separate the operation control panel of the thermostatic chamber and the operation control panel of the vibrator as in the related art, These can be integrated to improve operability and reduce device cost.

In the vibrator 2, the vibration table 21 and the sample W are vibrated in the vertical direction, for example, with a single amplitude of about 25 mm, depending on the model, the mass of the sample W, the operating state, and the like. Such a vibration state is also favorably supported by the air bearing.

In the combined environment / vibration test, the vibrator 2, the refrigerator unit 16 in the thermostat 1, and the cooling fan 2
0, etc., generate noise, but in the device of the present invention, since it is of an integral type, both sides of the vibrator are closed by the machine room 5 and the lower support base 6 and other parts are Can also be enclosed, and the noise radiated from the vibrator to the outside can be reduced. The refrigerator 16 is placed in the machine room 5 and the inside of the machine room 5 is soundproofed.
The cooling blower 20, which has conventionally been installed alone as a noise source and has become a noise source, can be placed in this soundproof section to prevent noise radiating to the outside.

In the environmental test, it is necessary to realize accurate test conditions while maintaining the target temperature and humidity. In this regard, since the apparatus of the present invention is integrated and does not have a seal portion for separating the thermostat and the vibrator, the sealing property between the thermostat and the vibrator is good even in a multifunction machine. . Therefore,
It is possible to perform an environmental test with higher accuracy than a conventional device. In addition, since it is not a separation type, a structure such as the upper seal 39 as shown in FIG. 3 is adopted, and the intrusion of drain into the vibrator 2 can be completely prevented.

In this composite testing machine, when a series of composite tests on one sample W is completed, the same composite test is performed on the next sample W. In this case, it is necessary to detect potential defects in automobiles and aircraft parts at an early stage and conduct a combined vibration / environmental test to eliminate such parts. As such, the machine is very advantageously used in such applications.

On the other hand, in a vibrator having an air bearing structure as shown in FIG. 2, since there is no complicated structure as in an oil bearing type vibrator, the constant temperature bath and the vibrator are separated for parts replacement or the like. The need for maintenance. As a result, a rail for moving the thermostat is not required, and the equipment cost and installation space can be reduced.

In the above description, a composite testing machine using a vibrator having an air bearing structure has been described. However, even in the case of a vibrator having an oil bearing structure, an external lubrication system is used or the life of replacement parts is extended. Accordingly, even if there is a disadvantage to some extent in terms of maintenance, it is possible to adopt an integral connection structure.

[0032]

As described above, according to the present invention, in the first aspect of the present invention, the constant temperature bath and the vibration generator are installed so as to maintain a fixed relational position. This eliminates the need for a seal portion for separation from the thermostat and improves the sealing performance between the thermostat and the vibrator. As a result, an accurate environmental test can be performed under vibration conditions. In addition, the seal between the inside of the thermostat and the vibrator can be made more complete, and the intrusion of water or the like into the vibrator can be completely prevented. Further, a rail for moving the thermostat is not required, so that equipment costs and installation space can be reduced. In addition, in addition to the above, since the vibration generating device of the composite device includes the vibrating body having a predetermined configuration, the support guide member, and the compressed gas supply means, the vibrating body can have an air bearing structure. As a result, there is no need to separate and maintain the thermostat and the vibrator for maintenance such as oil supply and replacement of parts of the bearing structure, so that even if the composite device is of an integrated structure type, there is no disadvantage in terms of maintenance. There is no such thing. And improvement of sealing performance, improvement of accuracy of environmental test,
Various operational effects such as a reduction in equipment cost and a reduction in installation space can be enjoyed.

On the other hand, there are a large number of DUTs that require a combined test of vibration and environmental conditions of temperature and humidity, and the necessity of conducting a test limited to the combined test has increased. However, the operating rate can be sufficiently increased.

[0034]

Further , the vibration environment combined test apparatus according to the first aspect of the present invention is provided with a refrigerator that has a low temperature condition as an environmental condition and therefore constitutes a part of an air conditioner, and is installed near the refrigerator. the vibration generator and coolable blower, a soundproof member provided to reduce the noise during operation of the refrigerator and blower, by the structure having a noise prevention of the blower noise prevention equipment of a refrigerator Can be shared. As a result, when cooling the vibrator, it is possible to effectively prevent noise emission to the periphery of the device at a low cost with a simple structure.

[0036] Further, the configuration of the invention of claim 1, eliminates the need to separate and the vibration operation system unit air-conditioning operation unit, by these provide an operating device which is the integrated, apparatus cost and improving the operability Can be reduced.

[Brief description of the drawings]

FIGS. 1A and 1B are explanatory views showing an example of the entire configuration of a multifunction tester to which the present invention is applied.

FIG. 2 is an explanatory view showing a structure of a main part of a vibrator which can be advantageously used in the above-mentioned device.

FIG. 3 is an explanatory view showing a combined state of the vibrator and the thermostat.

[Explanation of symbols]

Reference Signs List 1 constant temperature bath 2 vibrator (vibration generator) 4 operation control panel 14 heater (air conditioner) 15 humidifier (air conditioner) 16 refrigerator unit (refrigerator, air conditioner) 16a evaporator (air conditioner) 17 blower ( 20 air blower for cooling the vibrator (blower) 21 vibrating table (vibrating body) 22 cylindrical body (supporting guide member) 22a peripheral gap (guide space) 22b upper air chamber (supporting space) 23 compressed air pipe (compression) Gas supply means) 44 Temperature / humidity vibration control recording unit (operating device) 44a Air conditioning operation unit 44b Vibration operation unit 52 Sound absorbing material (soundproofing member) W Sample (test object)

Continuation of the front page (56) References JP-A-5-26785 (JP, A) JP-A-11-351779 (JP, A) JP-A-6-137991 (JP, A) JP-A-56-148038 (JP) JP-A-6-323950 (JP, A) JP-A-9-304221 (JP, A) JP-A-11-125543 (JP, A) JP-A-61-40645 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) G01M 19/00 B06B 1/04 G01N 17/00

Claims (1)

(57) [Claims] 1. A vibration environment combined test apparatus comprising: a constant temperature bath capable of applying a target environmental condition to a test object by an air conditioner; and a vibration generator capable of applying vibration to the test object. and the vibration generator and is being installed so as to keep a constant relationship position, the vibration generating apparatus,
A vibrating body that is in a shape of a cylinder and can apply vibration to the test object, a guide space for guiding the vibrating body to be vibrable, and a supporting space for supporting the vibrating body.
And the the support guide member provided, the compressed gas supply means capable of supplying compressed gas to said guide space and the support space portion so as to form between the said cylindrical wall inside surface and head inner surface, said Magnetic field to vibrate the vibrating body up and down
Body accommodating a coil that generates
A cover for covering the upper part, and an upper end of the cover and the vibrating body
And an internal seal for sealing between the parts.
The hot bath forms a test chamber in which the test sample is placed.
In front of the vibration generator
The bottom of the insulated casing for introduction into the test chamber
A notch formed in a side surface of the cover and the notch.
An outer seal interposed between the notch end face and the outer seal;
To cover the upper surface of the cover and the upper surface of the bottom portion.
And a top seal attached to the vibration environment combined test apparatus.