Four-comprehensive vibration test system

Abstract

The utility model discloses a four-comprehensive vibration test system, and belongs to the technical field of environment simulation test. The four-comprehensive vibration test system comprises a test box, a workbench, a vibration generator, a transition device, an air source, a first pressure detection piece and a second pressure detection piece, the workbench is arranged in the test box; the vibration generator is connected with the workbench through the transition device and can drive the workbench to vibrate. The air source is communicated with the transition air bag of the transition device so as to inflate the transition air bag or deflate the transition air bag; the first pressure detection piece is arranged in the test box, the first pressure detection piece is used for detecting first current air pressure in the test box, and the first pressure detection piece is in signal connection with the air source; and the second pressure detection piece is arranged on the transition device, is used for detecting the second current air pressure of the transition air bag and is in signal connection with the air source. The four-comprehensive vibration test system can keep the dynamic balance of the internal and external pressure difference of the test box.

Description

TECHNICAL FIELD

[0001] The utility model relates to environmental simulation test technical field, concretely relates to a four comprehensive vibration test system. BACKGROUND

[0002] The four comprehensive vibration test system is a kind of powerful, widely used test equipment, can comprehensively examine the adaptability of product under complex environment.The four comprehensive vibration test system is widely applied in the product test of aviation, aerospace, automobile, electronics, communication and multiple fields because of its advantages such as high integration, high reliability, accurate test result, energy saving and environmental protection, meets the test demand under various complex environmental conditions.

[0003] The four comprehensive vibration test system in the related art usually includes box, control module, temperature and humidity adjusting module, pressure adjusting module and vibration module, wherein, the box can provide enough space to accommodate the tested piece, while ensuring the stability and controllability of internal environment;The control module is responsible for the control and monitoring of the whole test process, ensures that each parameter changes according to the preset program;The temperature and humidity adjusting module accurately controls the temperature and humidity in the box through heating, refrigeration, humidification and dehumidification devices;The pressure adjusting module simulates different altitude environmental conditions by adjusting the air pressure in the box;The vibration module simulates the vibration environment that product may encounter in transportation and use process through vibration table and vibration generator, and the vibration table is usually driven by servo motor device or electric vibration device, which can generate linear vibration or rotary vibration.Because the air pressure in the box is lower than the external air pressure, a transition device needs to be arranged between the vibration generator and the vibration table, and the transition air bag in the transition device can realize pressure compensation between the inside and outside of the box, eliminate the initial displacement of the moving coil assembly of the vibration generator, and make it in the balanced position.However, in the prior art, when the air pressure in the box changes during the test process, and the air pressure of the transition air bag does not change synchronously, the moving coil assembly of the vibration generator will deviate from the balanced position, and then affect the accuracy of test results.

[0004] Therefore, there is an urgent need for a four comprehensive vibration test system to solve the above problems. UTILITY MODEL CONTENT

[0005] The utility model aims at solving or at least alleviating part or all of the above problems.Therefore, the utility model aims at providing a four comprehensive vibration test system, which can adjust the air pressure of transition air bag in real time, so as to adapt to the air pressure in the box, thereby ensuring the accuracy of test results.

[0006] In order to achieve the above target, the utility model adopts the following technical scheme:

[0007] A four comprehensive vibration test system, comprising:

[0008] test chamber;

[0009] a workbench arranged in the test chamber, the workbench being used for carrying a test piece;

[0010] a vibration generator and a transition device, the vibration generator being connected with the workbench through the transition device, and the vibration generator being capable of driving the workbench to vibrate;

[0011] a gas source being in communication with a transition air bag of the transition device, so as to inflate or deflate the transition air bag;

[0012] a first pressure detection piece arranged in the test chamber, the first pressure detection piece being used for detecting a first current air pressure P1 in the test chamber, and the first pressure detection piece being in signal connection with the gas source;

[0013] a second pressure detection piece arranged on the transition device, the second pressure detection piece being used for detecting a second current air pressure P2 of the transition air bag, and the second pressure detection piece being in signal connection with the gas source.

[0014] As a preferred scheme of the four-combination vibration test system provided by the utility model, the four-combination vibration test system further comprises a gas pump, the gas pump is in communication with the inside of the test chamber, so as to inflate or deflate the test chamber, and the gas pump is in signal connection with the first pressure detection piece and the second pressure detection piece.

[0015] As a preferred scheme of the four-combination vibration test system provided by the utility model, the four-combination vibration test system further comprises a gas pressure regulation unit, and the first pressure detection piece, the second pressure detection piece, the gas source and the gas pump are all in signal connection with the gas pressure regulation unit.

[0016] As a preferred scheme of the four-combination vibration test system provided by the utility model, the first current air pressure P1 and the second current air pressure P2 satisfy the following formula: |P0-P1|*s1=P2*s2.

[0017] Wherein, P0 is a standard atmospheric pressure, s1 is the area of the pressure difference between the inside and outside of the test chamber, and s2 is the effective cross-sectional area of the transition air bag.

[0018] As a preferred scheme of the four-combination vibration test system provided by the utility model, the first pressure detection piece is a pressure gauge, a pressure sensor or a pressure meter.

[0019] As a preferred scheme of the four-combination vibration test system provided by the utility model, the second pressure detection piece is a pressure gauge, a pressure sensor or a pressure meter.

[0020] As a preferred scheme of the four-combination vibration test system provided by the utility model, a through hole is formed in the side wall of the test box, the vibration generator is arranged outside the test box, one end of the transition device is connected with the output end of the vibration generator, and the other end penetrates through the through hole and is connected with the workbench.

[0021] As a preferred scheme of the four-combination vibration test system provided by the utility model, a sealing assembly is arranged between the transition device and the through hole.

[0022] As a preferred scheme of the four-combination vibration test system provided by the utility model, a connecting head is further arranged between the transition device and the workbench.

[0023] As a preferred scheme of the four-combination vibration test system provided by the utility model, the test box comprises an outer wall, a heat preservation structure and an inner wall, and the heat preservation structure is arranged between the outer wall and the inner wall.

[0024] The utility model has the advantages of:

[0025] The four-combination vibration test system provided by the utility model comprises a test box, a workbench, a vibration generator, a transition device and a gas source, wherein the test box is arranged on the workbench, the vibration generator is arranged on the test box, the transition device is arranged on the test box, and the gas source is connected with the transition device. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme in the utility model embodiment, the drawings needed to be used in the utility model embodiment will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the contents of the utility model embodiment and the drawings by those skilled in the art without any creative labor.

[0027] Figure 1 It is the structure schematic view of the four-combination vibration test system provided by the utility model;

[0028] Figure 2 It is the principle view of the four-combination vibration test system provided by the utility model;

[0029] Figure 3 is Figure 1 Local enlarged view at A.

[0030] Reference signs:

[0031] 100, test chamber; 101, through hole; 110, outer wall; 120, inner wall; 130, heat preservation structure;

[0032] 200, workbench;

[0033] 300, vibration generator;

[0034] 400, transition device;

[0035] 501, first pressure detection piece; 502, second pressure detection piece;

[0036] 600, air pressure regulation unit;

[0037] 700, sealing assembly; 710, sealing part; 720, fixed part;

[0038] 800, connecting head. DETAILED DESCRIPTION

[0039] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above-described accompanying drawings.

[0040] In the present application, the terms "comprise", "contain", "have" or any other variant thereof are intended to cover non-exclusive inclusions, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0041] In the present application, the term "and / or" is a description of the association relationship between the associated objects, which means that there can be three kinds of relationships. For example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents that the front and rear associated objects are in a "and / or" relationship.

[0042] In the present utility model, the terms "connect", "combine", "couple", "mount" can be direct connection, combination, coupling or mounting, or indirect connection, combination, coupling or mounting. Among them, the direct connection means that two parts or components are connected together without setting intermediate parts, and the indirect connection means that two parts or components are connected with at least one intermediate part, and the two parts or components are connected through the intermediate part. In addition, "connection" and "coupling" are not limited to physical or mechanical connection or coupling, and can include electrical connection or coupling.

[0043] In the present utility model, the relative terms (for example, "about", "approximately", "substantially" and the like) used in connection with quantities or conditions will be understood by those skilled in the art to include the stated value and have the meaning indicated by the context. For example, the relative terms at least include the degree of error related to the measurement of a specific value, the tolerance caused by manufacturing, assembly, use and the like related to a specific value. Such terms should also be regarded as disclosing a range defined by the absolute values of the two endpoints. The relative term can refer to the addition or subtraction of a certain percentage (for example, 1%, 5%, 10% or more) of the indicated value. The numerical value without the relative term should also be disclosed as a specific value with a tolerance. In addition, "substantially" when expressing the relative angular position relationship (for example, substantially parallel, substantially perpendicular), can refer to the addition or subtraction of a certain degree (for example, 1 degree, 5 degrees, 10 degrees or more) based on the indicated angle.

[0044] In the present utility model, those skilled in the art will understand that the functions performed by the components can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by the parts can also be performed by one part, one component, or multiple parts in combination.

[0045] In the present utility model, the terms "up", "down", "left", "right", "front", "back" and the like are described in the orientation and positional relationship shown in the drawings, and should not be understood as limiting the embodiments of the present utility model. In addition, it should also be understood in the context that when referring to one element connected to another element "up" or "down", it can not only be directly connected to another element "up" or "down", but also indirectly connected to another element "up" or "down" through an intermediate element. It should also be understood that the orientation terms such as upper side, lower side, left side, right side, front side and back side not only represent the positive direction, but also can be understood as the side direction. For example, the lower side can include the directly below, left below, right below, front below and back below.

[0046] Figure 1 The structure schematic diagram of the four comprehensive vibration test system provided by the embodiment is shown. Figure 1As shown, the embodiment provides a four-combined vibration test system, which comprises a test box 100, a workbench 200, a vibration generator 300, a transition device 400, an air source, a first pressure detection member 501 and a second pressure detection member 502; the workbench 200 is arranged in the test box 100, and the workbench 200 is used for carrying a test piece; the vibration generator 300 is connected with the workbench 200 through the transition device 400, and the vibration generator 300 can drive the workbench 200 to vibrate; the air source is connected with a transition air bag of the transition device 400 in communication, so as to inflate or deflate the transition air bag; the first pressure detection member 501 is arranged in the test box 100, and the first pressure detection member 501 is used for detecting a first current air pressure P1 in the test box 100; the first pressure detection member 501 is signal-connected with the air source; the second pressure detection member 502 is arranged on the transition device 400, and the second pressure detection member 502 is used for detecting a second current air pressure P2 of the transition air bag; and the second pressure detection member 502 is signal-connected with the air source.

[0047] The four-combined vibration test system provided by the embodiment can realize that the first pressure detection member 501 and the second pressure detection member 502 are arranged, and both are signal-connected with the air source; the first pressure detection member 501 and the second pressure detection member 502 can respectively detect the first current air pressure P1 in the test box 100 and the second current air pressure P2 of the transition air bag of the transition device 400 in real time; and the air source can inflate or deflate the transition air bag according to specific change amounts of the first current air pressure P1 and the second current air pressure P2, so as to ensure that the transition device 400 can provide dynamic pressure compensation for air pressure change of the test box 100 in a working process, thereby making the support force provided by the transition air bag for the workbench 200 always balance with the pressure difference between the inside and outside of the test box 100, and eliminating the initial displacement of a moving coil assembly of the vibration generator 300, and further ensuring the accuracy of a test result when the four-combined vibration test system tests the test piece.

[0048] Further, the four-combined vibration test system further comprises an air pump, which is connected with the inside of the test box 100 in communication, so as to inflate or deflate the test box 100; and the air pump is signal-connected with the first pressure detection member 501 and the second pressure detection member 502. By arranging the air pump, the air pump can inflate or deflate the test box 100 according to specific change amounts of the first current air pressure P1 and the second current air pressure P2; when the first current air pressure P1 or the second current air pressure P2 changes, the air source and the air pump are simultaneously started, the air source inflates or deflates the transition air bag, and the air pump inflates or deflates the test box 100, so as to realize the timeliness of an adjustment process of the pressure difference between the inside and outside of the test box 100. In addition, when one of the air source and the air pump fails, the other one can still work, so as to ensure that the four-combined vibration test system can smoothly complete the test.

[0049] It should be noted that the transition device 400 is a relatively mature technology in the prior art, and the specific structure and working principle of the transition device 400 are not described again in this embodiment.

[0050] The four-combination vibration test system also includes an air pressure regulation unit 600, and the first pressure detection member 501, the second pressure detection member 502, the air source, and the air pump are all in signal connection with the air pressure regulation unit 600. By setting the air pressure regulation unit 600, the control of the first pressure detection member 501, the second pressure detection member 502, the air source, and the air pump can be realized to ensure the cooperative work of the components and the timeliness and accuracy of the pressure regulation process of the test box 100 and the transition air bag.

[0051] Alternatively, the first current air pressure P1 and the second current air pressure P2 satisfy: |P0-P1|*s1=P2*s2; wherein P0 is one standard atmospheric pressure; s1 is the area of the pressure difference between the inside and outside of the test box 100; and s2 is the effective cross-sectional area of the transition air bag. That is, the air pressure regulation unit 600 functions to: when the first current air pressure P1 changes dynamically, the air pressure regulation unit 600 can output a signal to regulate P2 in real time to realize the dynamic pressure compensation between the inside and outside of the test box 100. The area s1 of the pressure difference between the inside and outside of the test box 100 and the effective cross-sectional area s2 of the transition air bag are both fixed values, which can be manually input into the air pressure regulation unit 600 by an operator before the test operation.

[0052] It should be noted that the technology involved in the air pressure regulation unit 600 belongs to the existing mature technology, which has been widely applied in the field and has clear principles, so it will not be described in detail here.

[0053] In this embodiment, the first pressure detection member 501 is a pressure gauge, and the second pressure detection member 502 is a pressure gauge. The pressure gauge has high measurement accuracy, simple and intuitive operation, high automation degree, and strong reliability. Of course, in other embodiments, the first pressure detection member 501 can also use devices with pressure detection functions such as pressure sensors and pressure gauges; the second pressure detection member 502 can also use devices with pressure detection functions such as pressure sensors and pressure gauges, and this embodiment does not limit this.

[0054] Figure 2 The principle diagram of the four-combination vibration test system provided in this embodiment is shown. As shown in FIG. 1, the four-combination vibration test system includes a test box 100, a transition air bag 200, and a transition device 400. Figure 2 and in combination with Figure 1As shown, when the first pressure detection member 501 detects a change in the first current air pressure P1 in the test chamber 100, a signal can be transmitted to the air pressure regulation unit 600, which controls the air source and / or the air pump to start according to the change in the first current air pressure P1, so as to adjust the air pressure of the transition air bag and / or the test chamber 100. For example, when the first pressure detection member 501 detects a decrease in the first current air pressure P1 in the test chamber 100, the air pressure regulation unit 600 receives the signal from the first pressure detection member 501, and controls the air source to deflate the transition air bag and / or the air pump to inflate the test chamber 100; when the first pressure detection member 501 detects an increase in the first current air pressure P1 in the test chamber 100, the air pressure regulation unit 600 receives the signal from the first pressure detection member 501, and controls the air source to inflate the transition air bag and / or the air pump to deflate the test chamber 100.

[0055] Figure 3 As shown Figure 1 The local enlarged view at A. As Figure 3 And in combination Figure 1 As shown, the side wall of the test chamber 100 is provided with a through hole 101, the vibration generator 300 is arranged outside the test chamber 100, one end of the transition device 400 is connected to the output end of the vibration generator 300, and the other end penetrates through the through hole 101 and is connected to the workbench 200. By arranging the vibration generator 300 outside the test chamber 100, the occupied space in the test chamber 100 can be reduced, the volume of the test chamber 100 can be reduced, and the material cost can be reduced to a certain extent.

[0056] Optionally, a sealing assembly 700 is arranged between the transition device 400 and the through hole 101, so as to ensure the sealing performance of the test chamber 100 and the transition device 400 at the connection position, and ensure that the internal environment of the test chamber 100 is not disturbed by external factors. It can be understood that, in the test, keeping the air pressure, temperature and other conditions in the test chamber 100 stable can prevent gas leakage, ensure the stability of the pressure difference, and avoid the influence of environmental changes on the accuracy of the test results.

[0057] Specifically, the sealing assembly 700 includes a sealing portion 710 and a fixing portion 720, one end of the sealing portion 710 is sleeved outside the transition device 400, and the other end of the sealing portion 710 is fixed to the inner wall 120 of the test chamber 100 through the fixing portion 720, so as to ensure the sealing performance of the test chamber 100 and the transition device 400 at the connection position and the installation stability of the sealing assembly 700. In this embodiment, the sealing portion 710 can be made of materials such as butyronitrile rubber and silicone rubber, so as to adapt to different media and working conditions.

[0058] Optionally, a connecting head 800 is arranged between the transition device 400 and the workbench 200 to ensure stable connection between the transition device 400 and the workbench 200. In the embodiment, the connecting head 800 is a clamping jaw structure, the fixed end of the clamping jaw structure is fixedly connected to the transition device 400, and the clamping end of the clamping jaw structure is used for clamping the edge of the workbench 200, thereby improving the stability of the workbench 200 during the test.

[0059] As shown in FIG. 1, the test box 100 includes an outer wall 110, a thermal insulation structure 130 and an inner wall 120, and the thermal insulation structure 130 is arranged between the outer wall 110 and the inner wall 120. Figure 1 The arrangement of the thermal insulation structure 130 can reduce heat exchange between the inside and outside of the test box 100, help maintain the temperature stability inside the test box 100, reduce the energy consumption of the temperature and humidity adjusting module, improve the uniformity of the temperature and humidity, keep the workbench 200 working in a stable environment, and improve the accuracy and reliability of the test results. Specifically, the outer wall 110 of the test box 100 is used to support the entire box structure and provide a stable external framework for the test box 100; the inner wall 120 of the test box 100 constitutes a pressure-bearing structure to ensure that the test box 100 meets the performance requirements during low-pressure test and makes the test carried out in a safe and qualified environment. In the embodiment, the thermal insulation structure 130 is thermal insulation cotton, which has good thermal insulation effect and low material cost.

[0060] The basic principle, main features and advantages of the utility model are shown and described above. The skilled in the art should understand that the above embodiments do not limit the utility model in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the utility model.

Claims

1. A four-combined vibration test system characterized by comprising: The application relates to a four-combined vibration test system. The four-combined vibration test system comprises a test box (100), a workbench (200) arranged in the test box (100) and used for carrying a test piece, a vibration generator (300) and a transition device (400), the vibration generator (300) is connected with the workbench (200) through the transition device (400), and the vibration generator (300) can drive the workbench (200) to vibrate, an air source is connected with a transition air bag of the transition device (400) and used for inflating or deflating the transition air bag, a first pressure detection piece (501) is arranged in the test box (100) and used for detecting a first current air pressure P1 in the test box (100), the first pressure detection piece (501) is signal-connected with the air source, and a second pressure detection piece (502) is arranged on the transition device (400) and used for detecting a second current air pressure P2 of the transition air bag, the second pressure detection piece (502) is signal-connected with the air source. The four-combined vibration test system further comprises an air pump, the air pump is connected with the inside of the test box (100) and used for inflating or deflating the test box (100), and the air pump is signal-connected with the first pressure detection piece (501) and the second pressure detection piece (502). The four-combined vibration test system further comprises an air pressure regulation unit (600), and the first pressure detection piece (501), the second pressure detection piece (502), the air source and the air pump are signal-connected with the air pressure regulation unit (600). The first current air pressure P1 and the second current air pressure P2 satisfy the formula: |P0-P1|*s1=P2*s2, wherein P0 is a standard atmospheric pressure, s1 is the area of the pressure difference between the inside and the outside of the test box (100), and s2 is the effective cross-sectional area of the transition air bag. The first pressure detection piece (501) is a pressure gauge, a pressure sensor or a pressure meter. The second pressure detection piece (502) is a pressure gauge, a pressure sensor or a pressure meter.

2. The four-combined vibration test system according to claim 1, wherein A through hole (101) is arranged on the side wall of the test box (100), the vibration generator (300) is arranged outside the test box (100), one end of the transition device (400) is connected with the output end of the vibration generator (300), the other end of the transition device (400) penetrates through the through hole (101) and is connected with the workbench (200).

3. The four-combined vibration test system according to claim 2, wherein A sealing assembly (700) is arranged between the transition device (400) and the through hole (101).

4. The four-combined vibration test system according to claim 1, wherein A connecting head (800) is further arranged between the transition device (400) and the workbench (200). The test box (100) comprises an outer wall (110), a heat preservation structure (130) and an inner wall (120), and the heat preservation structure (130) is arranged between the outer wall (110) and the inner wall (120).

5. The four-combined vibration test system according to claim 1, wherein ​ 6. The four-combined vibration test system according to claim 1, wherein ​ 7. The four-combined vibration test system according to claim 1, wherein ​ 8. The four-combined vibration test system according to claim 7, wherein ​ 9. The four-combined vibration test system according to claim 1, wherein ​ 10. The four-combined vibration test system according to any one of claims 1 to 9, characterized by ​

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