CN202267586U - Product testing system - Google Patents

Product testing system Download PDF

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Publication number
CN202267586U
CN202267586U CN2011203852999U CN201120385299U CN202267586U CN 202267586 U CN202267586 U CN 202267586U CN 2011203852999 U CN2011203852999 U CN 2011203852999U CN 201120385299 U CN201120385299 U CN 201120385299U CN 202267586 U CN202267586 U CN 202267586U
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CN
China
Prior art keywords
air
chamber
shaking platform
product
shaking
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CN2011203852999U
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Chinese (zh)
Inventor
詹姆士·A·普若沃斯特
马修·吉尔拉法
温德尔·K·R·哈特庆斯
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Ace Parker North America Ltd
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Qualmark Corp
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Priority claimed from US12/896,254 external-priority patent/US8485039B2/en
Priority claimed from US13/209,136 external-priority patent/US8616063B2/en
Application filed by Qualmark Corp filed Critical Qualmark Corp
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass
    • G01M99/002—Thermal testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00—Vibration-testing of structures; Shock-testing of structures
    • G01M7/02—Vibration-testing by means of a shake table
    • G01M7/025—Measuring arrangements

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

The product testing system includes a plurality of vibration platforms. The vibration platforms are controllable to vibrate products installed on the vibration platforms. The product testing system also includes an air circulator used control the temperature of air in the surrounding of the products. The vibration platforms include table tops and fixing devices connecting the products with the table tops. The table tops can selectively be fixed onto a mating structure in the product testing system and work as the vibration platforms in the product testing system in a starting process. And the table tops. And the table tops can be removed from the mating structure selectively to facilitate the connection or disconnection of the products and the table tops. A product testing controller includes a device used for controlling the vibration of the vibration platforms in a shared machine cabinet and a device used for controlling the temperature of air around the products installed on the vibration platforms.

Description

The product test system
Technical field
The application relates to the product test system.
Background technology
The exercise question that the application requires to submit on August 12nd, 2011 is the 13/209th of " METHOD AND APPARATUS FOR THERMAL CONTROL OF A MULTIPLE CHAMBER TEST SYSTEM (the thermal control method and apparatus of multicell test macro) " the; The right of priority of No. 136 U.S. Patent applications; The 13/209th; No. 136 U.S. Patent applications are that the exercise question of submitting on October 1st, 2010 is the continuation application of the 12/896th, No. 254 U.S. Patent application of " METHOD AND APPARATUS FOR THERMAL CONTROL OF A MULTIPLE CHAMBER TEST SYSTEM (the thermal control method and apparatus of multicell test macro) ".The exercise question that the application also requires on October 1st, 2010 to submit to is the right of priority of the 12/896th, No. 245 U.S. Patent application of " TESTSYSTEM WITH VIBRATION TABLE (test macro with shaking platform) ".Whole disclosures of above-mentioned application are incorporated this paper into way of reference.
Being used to carry out high accelerated aging test (HALT), highly accelerated stress screen (HASS) and the high system that quickens stress sampling observation screening (HASA) can be in order to the reliability of products and the permanance of test manufacturing.More specifically, durability of products can adopt HALT system and step to test.Product also can use HASS step or the test of HASA step to find defective before being dispensed into the consumer, in the HASS step, tested all over products, and in the HASA step, from product stream, selected sample to test.Generally, such test comprises and makes device under test stand vibrational energy and/or temperature cycles.Through device under test being installed to oscillator or the shaking platform in the test cabinet of controlled environment, can be with such stress to tested device.
The utility model content
The purpose that the application proposes is at least one defective that exists in the prior art in order to solve, as dumb, capacity is little and cost is high.
With regard to HASS and HASA program, comprise and utilize the HASS and the HASA program of the multiaxis random vibration of (per minute is greater than 40C) variation fast that following system can test large-tonnage product effectively.Disclose following test cabinet, said test cabinet allows to get into shaking platform from many sides, is placed in the test cabinet thereby be convenient to product to be measured, and is convenient to the interconnection of product to be measured to shaking platform.The prior art that has the big zone (and therefore seldom being used to support product to be measured) that is difficult to get into shaking platform is different, and system operation disclosed herein to be to increase the test cabinet treatment capacity, and the cost that therefore whenever receives measurement unit is lower than answering the cost during there is something special.In these systems, the shaking platform surface is determined size making full use of the space, thereby compared with prior art, the energy efficiency during having reduced the size of peripheral chambers and having improved thermal cycle.
According to some embodiment of the present disclosure, the system of the product test with a plurality of test cabinets or rack is provided.More particularly, all related with shaking platform a plurality of test cabinets or test volume are set in the single rack (among this paper, being sometimes referred to as " shell "), are used for testing simultaneously the multiple arrangement or the product that are called device under test here.Each test cabinet in the shell is provided to the temperature controlled air from plenum chamber.In addition, for the embodiment that adopts pneumatic actuator or pneumatic jack hammer, can involving vibrations platform gas shell, mix with the chamber atmosphere of temperature control to prevent the gas that actuator is discharged.
For in a plurality of chambers each identical or similar hot state is provided, various features has been developed and has been incorporated in the plenum chamber design.For example, in the inlet plenum part of air treatment system, arrange heating element and/or cooling element.Through one or more fans, air sucks inlet plenum, through heating and/or cooling element.According to some embodiment of the present disclosure, fan has the design of tangential air blast type.In addition, fan can have the width that is at or about the part plenum chamber assembly or the plenum chamber assembly.The air of fan output is through the exit portion of plenum chamber assembly or through the downstream chamber.Air is provided in the situation of a plurality of test cabinets that vertically pile up at the plenum chamber assembly, the downstream chamber is tapered or staggered, makes the area of plenum chamber increase with the distance of leaving fan and reduces.According to another embodiment of the present disclosure, can comprise one or more flow control apparatus.More particularly, flow control apparatus or fluidic can be arranged in the downstream chamber or be communicated with the downstream chamber, so that air is to the equilibrium distribution of a plurality of test cabinets.In addition, flow control apparatus can comprise changed course device, air damper, valve, flabellum, blade or be used for other structure or the device of the control air flow rate or the flow direction.According to other embodiment, the effect of flow control apparatus can change, in order to control from the downstream chamber to the air flow of the test cabinet related with flow control apparatus.According to another embodiment, adopting pneumatic actuator to operate in the situation of shaking platform, can shell be set so that the gas that pneumatic actuator is discharged is separated with the temperature control chamber atmosphere that occupies the test zone of said chamber.
According to some embodiment of the present disclosure, a plurality of test cabinets can be arranged to row.According to such embodiment, each row can with the air circulator part relation of special use.For example, each row test cabinet can be related with one or more heating elements, one or more cooling element, one or more fan and downstream chamber.In addition, be listed as the mode Be Controlled that related air circulator parts can have nothing to do through the air circulator parts with other test cabinet or test cabinet row with specific test cabinet or test cabinet, thereby increase the dirigibility and the application of product test system.Other the embodiment according to another, the flow control apparatus related with each test cabinet or test cabinet group can be by control respectively.
Method according to some embodiment of the present disclosure comprises a plurality of test cabinets that equably air are assigned to the product test system.This can comprise the air of Control Allocation to different chamber, makes that being blown into each indoor air rate equates or equate substantially.According to another other embodiment, the foundation of thermal uniformity or keep comprising with different flow rates being that different chambers provides the air from plenum chamber.According to another embodiment, said method can comprise the flow rate of the one or more supply air of variation in said test cabinet.In addition, can be separated from the air in the source outside the thermal control plenum chamber, influence the hot state in the test zone of a plurality of chambers to prevent this air.
According to another embodiment of the present disclosure, method can comprise that control air is to the different chamber of product test chamber system or the distribution of one group of chamber independently.For example, when system has a plurality of volume of many test cabinets,,, can control heating element, cooling element or fan individually for each volume.As another example, can control flow control apparatus individually, said flow control apparatus includes but not limited to the active flow control apparatus related with each test cabinet.For example, in same test cabinet row or in different test cabinet row, the flow control apparatus that is used for certain test cabinet can irrespectively be operated with the flow control apparatus that is used for other test cabinet.
The embodiment of this paper can make up with the any-mode in the following mode, and after those skilled in the art read and understand the disclosure, other embodiments will be conspicuous.
A. the product test system can comprise a plurality of shaking platforms, controlledly is installed on the product on the said shaking platform with vibration; And air circulator, control the air themperature of said product surrounding air.
B. system controller be can comprise like the indicated system of A more than, said air themperature and the vibration that is applied to said shaking platform controlled.
C. can comprise system controller like A or the indicated system of B more than, said system controller has the vibrating controller of the said vibration of control.
D. above as system that A, B or C are indicated can the involving vibrations controller, and vibrating controller can be operated with the vibration of all shaking platforms in control (a) a plurality of shaking platforms respectively or control the vibration of the one or more subclass in (b) a plurality of shaking platforms.
E. can comprise temperature controller like the indicated system of A to D more than, control said air circulator to adjust said air themperature.
F. can comprise air circulator like the indicated system of A to E more than; Said air circulator has at least one thermal control element, pipeline and at least one fan, and at least one thermal control element, said pipeline and said at least one fan collaborative work are to adjust said air themperature.This thermal control element can be one of heating element and cooling element.
G. can comprise stratie like the indicated system of A to F more than as the thermal control element.
H. can comprise air circulator like the indicated system of A to G more than, air circulator is configured to adopt cryogenic liquid to cool off said product.In these systems, air circulator can be configured to adopt air at room temperature to blow through (a) and annotate the pairing chamber of said product, and then (b) adopts said cryogenic liquid, and said product is cooled off from the temperature higher at least 20 degrees centigrade than room temperature.
I. abovely can comprise one or more in a plurality of shaking platforms like the indicated system of A to H, it can remove from system to help the installation of said product.
J. abovely can comprise the rack that holds said shaking platform like the indicated system of A to I, one or more in the said shaking platform can slip into or skid off said rack, to help the installation of said product.In these systems, shaking platform can slip into or skid off said rack through sliding part, linear bearing, roller bearing or wheel.
K. abovely can comprise fabricated section, in the said shaking platform each is mounted in the said system securely like the indicated system of A to J.
L. can comprise stationary installation like the indicated system of A to K more than, can operate so that said product is mounted to said shaking platform.Stationary installation can comprise the one or more elements in the following element: be configured to the hand welding with the shape and size of said product coupling, magnetic forceps, vacuum forceps, bolt; Door bolt, hinge, button, magnet; Electric actuator, spring is equipped with the equipment of spring, and locatees link stopper.
M. can comprise a plurality of chambers like the indicated system of A to L more than, each in said a plurality of chambers is surrounded one of said shaking platform, and has the controllable actuator that produces the vibration that is applied to said product.In these systems, (i) at least two chambers in a plurality of chambers can have different size or shape; At least one shaking platform in (ii) a plurality of shaking platforms can be along the wall or the top configuration of its chamber; (iii) air circulator can comprise the air-flow blade that can control, said air-flow blade can operate with the flow rate through the air of at least one chamber in said a plurality of chambers of convection current selectively with one of flow to or all adjust; And thereby at least one chamber in (iv) a plurality of chamber can be arranged in the top formation row of another chamber.
N. can comprise air circulator like the indicated system of A to M more than, it is the said air themperature of each independent control in a plurality of chambers that air circulator is configured to.In these systems, (i) at least two chambers in a plurality of chambers can have different size or shape; (ii) air circulator can comprise the air-flow blade that can control, said air-flow blade can operate with the flow rate through the air of at least one chamber in said a plurality of chambers of convection current selectively with one of flow to or all adjust; And thereby at least one chamber in (iii) a plurality of chamber can be arranged in the top formation row of another chamber.
O. can comprise the rack that holds a plurality of said chambers like the indicated system of A to N more than, said rack can comprise at least one access door of the chamber that is used to form row.In these systems; (i) access door can form a plurality of access door; Each access door in wherein closed said a plurality of access door is isolated one or more chambers and the room air in said a plurality of chamber, and opens at least one access door and can not change the isolation with the corresponding chamber of at least one other access door; One or more height in said rack in the (ii) said chamber can be adjusted vertically; (iii) said row can remove from said rack, and said system can also comprise the product frame, are used to be placed on the position at row in the said rack, that be removed place; Thereby under controlled air themperature, can product be placed on the said product frame in the said rack; (iv) in said a plurality of chambers each; Said system can also comprise no screw thread side plate; Be used to make oscillation actuator to separate on environment with shaking platform separately, said actuator can comprise pneumatic actuator, and said side plate and separately chamber can form labyrinth sealing; (vi) said air circulator can comprise the air-flow plenum chamber that interlocks, thereby flows for each chamber in the said row provides uniformly, and said plenum chamber is shaped at the rear wall place of said rack; And/or (vii) said system can comprise controller; Be used for the control air temperature and for the vibratory output of each shaking platform of chamber; Each chamber in said a plurality of chamber can comprise (a) at least one thermocouple, to said controller temperature survey feedback is provided, and (b) at least one accelerometer; To said controller Accelerator Feedback is provided, thereby helps the active feedback control of temperature and vibratory output respectively.
P. can comprise the rack that holds a plurality of said chambers like the indicated system of A to O more than; Said rack can comprise at least one access door of the chamber that is used to form row; And said air circulator can comprise the air-flow plenum chamber that interlocks, thereby flows for each chamber in the said row provides uniformly.In these systems; The vibration of the platform in the said row can be that the unit is controlled with the group; And/or the staggered plenum chamber of said air-flow can link to each other with each chamber in the said row through air out, wherein apart from the area of the farther air out of the fan of the said air actuator area less than the nearer air intake of the said fan of distance.
Q. can comprise the rack that holds a plurality of said chambers like the indicated system of A to P more than; Said rack can comprise at least one access door of the chamber that is used to form row; And said air circulator can comprise the air-flow plenum chamber that interlocks, thereby flows for each chamber in the said row provides uniformly.In these systems, the one or more chambers in said a plurality of chambers can comprise at least one thermocouple, to said controller the temperature survey feedback are provided; And at least one accelerometer; To said controller Accelerator Feedback is provided; Thereby help the active feedback control of temperature and vibratory output respectively; And (i) said at least one accelerometer can be or comprise that three axis accelerometer, said three axis accelerometer can be operated and think that its shaking platform provides three-dimensional vibrating feedback; (ii) said at least one accelerometer can be first linear accelerometer, and perpendicular to second linear accelerometer of said first linear accelerometer, said second linear acceleration is counted its shaking platform the twin shaft feedback is provided.
R. above can being configured like the indicated system of A to Q makes that the temperature of each chamber and vibration can be through network controls.
S. can comprise like the indicated system of A to R more than: shaking platform, shaking platform comprises framework, framework is connected with oscillation actuator; And stationary installation pallet; Be connected with said product; Said framework and said stationary installation pallet are configured to (a) and in said system, link together securely, perhaps (b) thus separate with said system said stationary installation pallet can be removed from said system.In this system, (i) framework can comprise the seal pad of the said product ambient air of isolation to prevent to discharge from actuator; (ii) be not the framework of sealing, but said stationary installation pallet seal, make that said stationary installation pallet is mounted to said lframe cross piece to leave said product ambient air and discharge from actuator preventing; Each shaking platform in perhaps (iii) said a plurality of shaking platforms can comprise two-layer; Ground floor in two-layer forms the framework that is connected with oscillation actuator; The second layer in two-layer forms the stationary installation pallet; Be used for product is installed in said stationary installation pallet, and said system also comprises rack and a plurality of chamber that each chamber comprises the said second layer; Make (a) when each shaking platform of said system two-layer links together securely; Said chamber separates on said rack internal environment, perhaps (b) when the two separate of each shaking platform of said system, said chamber can remove from said rack.
T. abovely can comprise at least one shaking platform in said a plurality of shaking platform like the indicated system of A to S, it can be vertically and is selectively removable, to help placing the product that is installed on said at least one shaking platform.
U. can comprise rack and a plurality of chamber like the indicated system of A to T more than; Each chamber in said a plurality of chamber surrounds one of said shaking platform and has the actuator that causes the platform vibration of independent control; Said air circulator is configured each chamber of making in said a plurality of chamber control air temperature separately, and the height of each chamber in said rack can be adjusted.In this system, two or more chambers in said a plurality of chambers are networked together and are used for shared vibration and air themperature operation.
V. can comprise the electric actuation stationary installation like the indicated system of A to U more than, said electric actuation stationary installation can be operated to make product be attached to each platform automatically at least in part.
W. can comprise at least one shaking platform like the indicated system of A to V more than; A said shaking platform one of comprises in electromagnet and the vaccum suction pipe or all, said electromagnet and said vaccum suction pipe can be controlled selectively product is attached to said vacuum platform or product is discharged from said shaking platform.
X. can comprise the rack that holds said chamber like the indicated system of A to W more than, said rack comprises at least one access door that is used for said row.
Y. above can test products like the indicated system of A to X, said product comprises the electronic product that has stationary installation or do not have stationary installation.
Z. can comprise at least one shaking platform in said a plurality of shaking platform like the indicated system of A to Y more than, it is bent, is shaped or increases the weight of, to change the vibration frequency response of said at least one shaking platform on the zone at said platform when starting.
AA. can comprise a plurality of tangential fans like the indicated system of A to Z more than, the product of each fan in chamber in said a plurality of tangential fans provides air-flow, and said chamber is arranged to vertical row.In this system, said tangential fan can be along the common drive axis configuration that is driven by engine and/or band.
AB. can comprise centrifugal blower like the indicated system of A to AA more than.
AC. vibratory tray can comprise: desktop; And stationary installation; Be used for product is connected to said desktop; Wherein, said desktop can selectively be fixed to the intrasystem supporting structure of product test, and when starting, is used as the intrasystem shaking platform of said product test; And said desktop can selectively remove from said supporting structure, to help making product be connected or separate with said desktop.
AD. the product test controller can comprise the device that the vibration of a plurality of shaking platforms in the shared rack is controlled; And the device that the air themperature of the product installed on the said shaking platform is controlled.
AE. the above device that can comprise the control air temperature like the indicated system of AD forms the device that the air circulator that drives air-flow in the said rack is controlled.
AF. above as AD or the indicated system of AE can comprise the device of control vibration, and its utilization is controlled said vibration from following one or two Accelerator Feedback: (a) at least one shaking platform said a plurality of shaking platform; And (b) be mounted to the product of at least one shaking platform in said a plurality of shaking platform.
AG. the above as indicated system of AD, AE or AF can comprise the device of control air temperature, and its utilization is controlled said air themperature from following one or two Temperature Feedback: (a) air temperature sensor and (b) product temperature sensor.
The vibration chamber that AH. can seal on the environment can the involving vibrations platform, and product is mounted to said shaking platform; And one or more oscillation actuators, make said shaking platform vibration in response to drive signal.Said vibration chamber can selectively be fixed in the product test system; Said product test system provides said drive signal and controls the air themperature in the said chamber; And said chamber can selectively remove from said system, to help making product be connected or separate with said shaking platform.
AI. test macro can comprise the test cabinet; Be arranged in a plurality of test cabinets in the said test cabinet; Air circulator comprises: air intake, a plurality of air outs; Wherein at least one air out is related with each test cabinet in said a plurality of test cabinets, inlet plenum, fan; Wherein said fan is supplied air from said inlet plenum, the downstream chamber, and wherein said fan supplies air to the downstream chamber; And a plurality of shaking platforms, each test cabinet in wherein said a plurality of test cabinets comprises at least one shaking platform.
AJ. above can involving vibrations platform cover like the indicated test macro of AI, wherein at least one shaking platform is related with the shaking platform cover; And/or a plurality of shaking platform actuators; Each shaking platform in wherein said a plurality of shaking platform is related with the shaking platform actuator, and the said shaking platform cover of said at least one shaking platform surrounds the volume that the shaking platform actuator that is used for this shaking platform and qualification and said air circulator separate.
AK. above as AI or the indicated test macro of AJ can comprise and (i) be arranged in above another shaking platform, and (ii) comprise related said at least one shaking platform cover of shaking platform of header board and base plate.
AL. can comprise the whole shaking platform related like the indicated test macro of AI, AJ or AK more than with the shaking platform cover; Wherein at least one shaking platform cover related with shaking platform comprises header board in the bottom of a row shaking platform, and at least one the shaking platform cover that is associated with the shaking platform that is arranged in another shaking platform top comprises header board and base plate.
AM. can comprise at least one changed course device like the indicated test macro of AI to AL more than, wherein at least one changed course device is arranged in the said downstream chamber, and said at least one changed course device forms the constriction zone in the said downstream chamber.In this system, said changed course device can be in the upper reaches or the downstream of arbitrary said air out.
AN. can comprise at least one flow control apparatus like the indicated test macro of AI to AM more than.Said at least one flow control apparatus can comprise any changed course device, damper, valve, grid, air hole, outlet and active flow control apparatus.
AO. can comprise tangential fan like the indicated test macro of AI to AN more than as fan.
AP. can comprise the thermal control element that is arranged in the said inlet plenum like the indicated test macro of AI to AN more than.
AQ. the multicell test macro can comprise rack; At least one door; A plurality of test cabinets, wherein each said test cabinet is arranged in the said rack; A plurality of shaking platforms, wherein each test cabinet comprises at least one shaking platform, and gets into each shaking platform through at least one door; And air circulator, comprising at least one inlet, downstream chamber, be arranged in said air out indoor at least one changed course device and a plurality of air out, each test cabinet in wherein said a plurality of test cabinets is related with at least one air out.
AR. abovely can comprise a plurality of test cabinets like the indicated test macro of AQ, said a plurality of test cabinets are arranged to form at least one row test cabinet, and wherein the shaking platform cover is related with each test cabinet above any other test cabinet.
AS. can comprise at least one shaking platform cover like AQ and the indicated test macro of AR more than, at least one test cabinet in wherein said a plurality of test cabinets is related with the shaking platform cover.
AT. the system that the temperature of the product in the test cabinet is controlled can comprise the thermal control element, is used for heating or cooling air; Fan is used to make air movement through said thermal control element and get into said test cabinet; Temperature sensor is positioned at said test cabinet; Storer has the preferred temperature spectrum that is stored in wherein; And controller, be connected to said temperature control element and said temperature sensor.Said controller can use the actual temperature of the said test cabinet of said temperature sensor measurement; Based on said preferred temperature spectrum and said actual temperature, usage ratio integral differential (PID) function is confirmed the temperature throttling valve; And the temperature throttling of said thermal control element is set to said temperature throttling valve.
AU. can comprise controller like the indicated system of AT more than, said controller is carried out convergence algorithm to confirm said temperature throttling valve, and the temperature throttling valve of the said convergence algorithm pair storage that moves before relative with said preferred temperature spectrum is handled.
AV. can use the PID function to come the said temperature throttling of further adjustment based on the measured temperature values of the storage of operation before said and the difference between the said actual temperature like AT or the indicated system of AU more than.
AW. can also comprise the fan throttling like the indicated system of AT, AU or AV more than; Be used to control the speed and the air-flow that gets into said chamber of said fan; And controller can use the PID function that said fan throttling is set based on the measured temperature values of the storage of operation before said and the difference between the said actual temperature.
AX. can also comprise changeable flow equipment like the indicated system of AT to AW more than, be used to limit the air-flow that gets into said chamber; And the flow throttling, be used to control said changeable flow equipment.Controller can use the PID function that said flow throttling is set based on the measured temperature values of the storage of operation before said and the difference between the said actual temperature.
According to above-mentioned one or more technical schemes, can make at least that test macro has flexibly, one of the advantage in high capacity and the low cost.
According to following discussion, particularly when combining accompanying drawing, it is more clear that the feature and advantage of other of the application's embodiment will become.
Description of drawings
Fig. 1 is the front perspective view according to the product test system of embodiment;
Fig. 2 is that wherein open at the Qianmen according to the front perspective view of the product test system of embodiment;
Fig. 3 is the side cross-sectional view according to the part of the product test system of embodiment, has wherein described some characteristics of air circulator;
Fig. 4 A is the front view according to the part of the product test system of embodiment, has wherein described some characteristics of air circulator;
Fig. 4 B is the front view according to the part of the product test system of embodiment, has wherein described some characteristics of air circulator;
Fig. 4 C is the front schematic view according to the shaking platform assembly of the product test system of embodiment;
Fig. 4 D is the front schematic view according to the shaking platform assembly of the product test system of embodiment;
Fig. 4 E is the front schematic view according to the product test system of the extensible row chamber of having of embodiment;
Fig. 4 F is according to embodiment, the front view of the product test system that has shown in Fig. 4 E, and wherein, an extensible row chamber is moved out of and is substituted by the product frame;
Fig. 5 A is the bottom perspective view according to the part of the shaking platform assembly of embodiment;
Fig. 5 B is the backplan according to the part of the shaking platform assembly of embodiment;
Fig. 5 C is the top view according to the part of the shaking platform assembly of embodiment;
Fig. 5 D is the front view according to the part of the shaking platform assembly of embodiment, comprising the shaking platform support component;
Fig. 5 E is the side view according to the part of the shaking platform assembly of embodiment, comprising the shaking platform support component;
Fig. 5 F shows the framework according to embodiment, and this framework is configured to the airtight stationary installation pallet that product can be installed and is connected;
Fig. 5 G schematically shows the stationary installation pallet according to the line 5G-5G along Fig. 5 F of embodiment and how to realize seal with framework, and shows and can be used in the fixed form that the product of testing in the system is installed;
Fig. 6 is the block diagram that illustrates according to the parts of the product test system of embodiment;
Fig. 7 is the process flow diagram that illustrates according to the operation of the product test system of embodiment;
Fig. 8 is the block diagram that illustrates according to the parts of the product test system of other embodiment;
Fig. 9 shows the air out according to embodiment;
Figure 10 shows the air out according to embodiment;
Figure 11 is according to embodiment, like Fig. 1, and 2,3,4A-4D, the synoptic diagram of 6 and 8 product test system, it has further shown the details that exemplary temperature control is provided;
Figure 12-the 18th illustrates and is used for controlling the process flow diagram like the illustrative methods of the temperature in Fig. 1,2,3,4,6 and 8 the test cabinet according to embodiment;
Figure 19 is the temperature-time diagram according to embodiment, and wherein, the solid line representative is like the preferred temperature of test cabinet among the Fig. 1,2,3,4,6 and 8 that thinks to limit in the expectation spectrum among Figure 11, and dotted line is represented the measurement temperature of test cabinet; And
Figure 20 is the temperature-time diagram according to embodiment, and wherein, solid line is represented the preferred temperature of test cabinet among Fig. 1 shown in Figure 19,2,3,4,6 and 8, and the dotted line representative utilizes the measurement temperature of the test cabinet of the adjustment spectrum control among Figure 11.
Embodiment
Fig. 1 is the front perspective view of product test system 100, and this product test system 100 comprises rack or the shell 104 with a plurality of independent test cabinets 108.In the example shown, six test cabinets 108 are included in the system 100.But, under the situation that does not break away from the application's scope, can comprise any a plurality of test cabinet 108 in the system 100.According to illustrative embodiments, each independent test cabinet 108 involving vibrations platform and the thermal control environment that is suitable for carrying out reliability of products, durability and/or defect test.Though a plurality of test cabinets 108 shown in Fig. 1 are similar on size and dimension, under the situation that does not break away from the application's scope, system 100 can comprise a plurality of test cabinets with different size and shape.
Fig. 2 shows the product test system 100 of Fig. 1, and wherein access door 204 is opened, to allow to enter into each test cabinet 108.Under the state that door 204 is opened, in embodiment, can observe some parts in the parts of test cabinet 108.Especially, in the embodiment of Fig. 2, each test cabinet 108 comprises oscillator or shaking platform assembly 208.Each shaking platform assembly 208 usually comprises the shaking platform 212 with installation side or surface 214, and said installation side or surface 214 comprise mounting points 216, and product to be measured can directly or be connected to mounting points 216 through one or more stationary installations.Though the shaking platform that shown among Fig. 2 212 is rectangle, shaking platform can be bent, is shaped or increases the weight of, when starting, changing the frequency response of platform, such as among Fig. 5 A-5E for example demonstration or as described in.
Each shaking platform assembly 208 can be associated with side plate 220; Side plate 220 is with the sidewall 228 and the median wall 230 of the lateral extent of shaking platform cover 224 (as shown in Figure 3) and qualification test cabinet 108; Surround actuator and the support member (in Fig. 2 not shown, see 5A to Fig. 5 E) related with shaking platform assembly 208.This air that allows the weather in the test cabinet 108 to control is retained with actuator and separates.For example, the actuator of shaking platform assembly 208 can be accommodated in the environment that separates with the chamber atmosphere that is provided to test cabinet 108 thus, and wherein device under test is arranged in the test cabinet 108 and stands thermal cycle and/or heat control.As another example; For the system 100 that uses pneumatic actuator; Through surrounding the actuator related, can prevent to mix with the chamber atmosphere that is provided to test cabinet 108 from the gas of the pneumatic actuators discharge related with shaking platform assembly 208 with each shaking platform assembly 208.
Fig. 2 shows the embodiment of the parts related with the air circulator of product test system 100 232.In the embodiment of Fig. 2, air circulator 232 comprises at least one air intake 236.In addition, for each test cabinet 108 that comprises in the system 100, be communicated with at least one this inlet 236 with test cabinet 108 related volumes.In the example system shown in Fig. 2 100, three test cabinets 108 of each row have an air intake 236.Air circulator 232 comprises inlet plenum 240 extraly.Inlet plenum 240 passes through air intake 236 admission of airs, and can take in air circulation fan 304 or be communicated with (see figure 3) with air circulation fan 304.
Fig. 3 shows the sectional view of the system 100 in the embodiment, and shows the characteristic of air circulator 232 especially.Usually, the chamber atmosphere of temperature control circulates via test cabinet 108 through air circulator 232.In operation, air is drawn in the inlet plenum 240 through air intake 236 by fan 304.Fan 304 can comprise the tangential fan blower; But a plurality of fans 304 can be set.As shown in Figure 3, inlet plenum 240 is taken in thermal control element 306, and each in these thermal control elements can comprise heating arrangement 308 and/or cooling device 312.As an example, heating arrangement 308 is straties, and cooling device 312 is the cooling systems (this cryogenic liquid can be liquid nitrogen or other cryogenic liquids) that utilize cryogenic liquid.In some embodiments, from high temperature (for example, than room temperature high 20 degrees centigrade or more) downward cooling products is at first through using air circulator 232 to utilize air at room temperature flushing test cabinet 108, thereby save the cryogenic liquid cost.After the section or when sensing predetermined temperature decline, then can implement the cryogenic liquid cooling at the fixed time to accomplish the finishing temperature that product is cooled to expect.
The air that is sucked in the inlet plenum 240 can be heated or cooled as required, is provided to the test cabinet 108 of system 100 with the supply air that will be in desired temperature.Can understand like those of ordinary skills, the operation of the thermal control element 306 of particular type can increase or reduce the volume of the air in the air circulator 232.Therefore, in some embodiments, air circulator 232 can comprise the setting of taking in as requested or discharging air, to keep the air pressure of the constant or approximately constant in the rack 104.
Distribute or downstream chamber 320 through fan outlet 316 arrival air by the air of fan 304 through inlet plenum 240 suctions.As shown in Figure 3, downstream chamber 320 has with the degree of depth that reduces usually apart from increasing apart from fan outlet 316.In addition, for each test cabinet 108 air out 324 is set.The reducing of the depth d of downstream chamber 320 provides the air-flow plenum chamber that interlocks, and this helps the air of the temperature control of isodose is provided to test cabinet 108.In addition, downstream chamber 320 can include the further feature that helps the air of isodose is provided to each test cabinet 108.For example, one or more changed course devices 328 can be set, with the air flow in the control downstream chamber 320.
Air circulator 232 can comprise one or more flow control apparatus 330.For example, can comprise flow control apparatus 330 with one or more changed course devices 328.Changed course device 328 can comprise surface or the volume that forms the contraction flow region in the downstream chamber 320.In addition, changed course device 328 can be disposed in 324 downstream.The changed course device 328 that comprises contraction flow region forms the zone that pressure rises, and this zone has promoted the air flow of passing through air out 324 at the direct upstream end of changed course device 328.Therefore, changed course device 328 can be in order to equilibrate to the air flow of test cabinet 108.Other the embodiment according to another, changed course device 328 can comprise the contraction flow region with movable surfaces 334, with the change in size of the contraction flow region in the permission downstream chamber 320, thereby changes the air flow through near air out 324.Alternatively or additionally, air out 324 can comprise the flow control apparatus 330 of valve or grid form, said flow control apparatus can be conditioned with the air flow of control through air out 324.
According to other embodiment, downstream chamber 320 can have along the downstream chamber 320 length and keep the constant degree of depth.According to such embodiment, can be by the changed course device, air damper, valve or 330 controls of other flow control apparatus that are arranged in fan 304 and the one or more test cabinet 108 from downstream chamber 320 to each test cabinet 108 interior air flow.For example, with can have relative bigger throttling property than outlet 324 related flow control apparatus 330 with the first outlet downstream part near the outlet 324 related flow control apparatus 330 of fan 304.For example, can have the littler area of area apart from fan 304 relative nearer outlets 324 than the air out 324 farther relatively apart from fan 304.Through constructing flow control apparatus 330 so in a different manner, can make the flow equalization of each chamber 108, be positioned at diverse location even supply the outlet 324 of each test cabinet 108 with respect to fan 304.According to another embodiment, flow control apparatus 330 can comprise variable flow control apparatus 330.In addition, variable flow control apparatus 330 can receive ACTIVE CONTROL.For example, initiatively flow control apparatus 330 can comprise the device 328 that initiatively alters course, and the device 328 that wherein alters course has the surface 334 movable with respect near outlet 324.Especially, move, can increase or reduce the zone of downstream chamber 320 through making this surface.This allows to regulate flowing through one or more outlets 324 conversely.As another example, flow control apparatus 330 can comprise variable air damper.
Fig. 4 A is the front view according to the part of the used air circulator 232 of the product test system of another illustrative embodiments 100.In this embodiment, for each row test cabinet 108 is provided with air intake 236, and air out 324 is set for each test cabinet 108.In addition, air circulator 232 comprises first 320a of downstream chamber and second 320b of downstream chamber.More particularly, first 320a of downstream chamber is related with the first row test cabinet 108, and second 320b of downstream chamber is related with secondary series test cabinet 108.Product test system 100 can comprise two fan 304a and 304b, and each fan 304 can supply air to one among 320a of downstream chamber and the 320b.Therefore, each 320a of downstream chamber can be related with fan 304 with 320b.Two fans 304 can be from public inlet plenum 240 extracting airs.Alternatively, inlet plenum 240 can be divided into the first inlet plenum 240a and the second inlet plenum 240b.In the situation of inlet plenum 240a that separation is provided and 240b, they all can hold the thermal control element 306a and the 306b of separation, the heating arrangement 308a that said thermal control element comprises separation and 308b and/or the cooling device 312a and the 312b that separate.Perhaps public inlet plenum 240 can hold the thermal control element 306a and the 306b of separation, and both serve relevant 320a of downstream chamber and 320b fully or mainly.In addition, the thermal control element 306a of separation and 306b can be provided different heat or the amount of cooling water of adding with the test cabinet 108 to different lines by control respectively.For example; Shown embodiment can comprise two tangential fans 304; One of them fan 304a supplies air to the first row test cabinet 108 via first 320a of downstream chamber, and the second fan 304b supplies air to secondary series test cabinet 108 via second 320b of downstream chamber.In addition, each fan 304a and 304b can receive independently control, to provide different air capacity to different outlets chamber 320a and 320b.By way of parenthesis, each 320a of downstream chamber and 320b can comprise one or more flow control apparatus 330.For example, the area of outlet 324 can change with the distance apart from inlet plenum 240.In addition, one or more flow control apparatus 330 can comprise variset.For example, changed course device 328 and/or export 324 and can operate, with optionally change through or air flow through flow control apparatus 330.In the situation that variable flow control apparatus 330 is provided, said flow control apparatus can receive ACTIVE CONTROL.In addition, related with first 320a of downstream chamber flow control apparatus 330 can be controlled with the flow control apparatus that is associated with second 320b of downstream chamber 330 with being separated.The increase of the distance of the air that the width of downstream chamber 320 and/or the degree of depth can be used to supply weather control with distance fan 304 of 320 to the downstream chamber reduces.Alternatively, for example in the situation that comprises changed course device 328 or other flow control apparatus 330, it is constant that the degree of depth of downstream chamber 320 and width can keep.
Fig. 4 B is the front view according to the part of the used air circulator 232 of the product test system of illustrative embodiments 100.In this embodiment, for each row test cabinet 108 air intake 236 is set.In addition, for each row test cabinet 108 air out 324 is set.Therefore, the air circulator in this embodiment 232 comprises the air intake 236 and air out 324 that usually is arranged to two parallel columns.In this example, the width W of downstream chamber 320 is constant.According to other embodiment, this width W can increase with the distance apart from fan 304 and reduce.Therefore, no matter whether the width W and/or the depth d of downstream chamber reduce, the volume of downstream chamber can increase with the distance apart from fan 304 and reduce.Although air intake 236 can be arranged to parallel row with air out 324, the thermal control element 306 in fan 304, inlet plenum 240 and the inlet plenum 240 air circulator 232 relatively is shared.Therefore, these shared parts of air circulator 232 can be supplied the test cabinet 108 of the air of thermal control to system 100.
Fig. 4 C is the front schematic view according to shaking platform assembly 208 in the product test system 100 of another embodiment.In this embodiment, each shaking platform assembly 208 is configured to and utilizes sliding part 207 to load the product with uninstalling system 100 build-in tests.Be arranged with each shaking platform assembly 208 corresponding sliding part 207 and make assembly 208 in system 100, can outwards slide at least.Sliding part 207 is slide plates, but term " sliding part " also comprises this equipment among this paper, and this equipment comprises is convenient to linear bearing, roll, wheel hub and the similar devices that the transverse movement of shaking platform assembly got into or left system 100.In Fig. 4 C, show pair of sliders 207 for each assembly 208, but some embodiment can only use a sliding part 207; And independent sliding part 207 can be advantageously installed with other structures, for example from the back mounted on surface of system 100.Sliding part 207 can also be configured and make shaking platform assembly 208 to remove from system 100 fully.Use sliding part to help getting into shaking platform 212 (for example, as shown in Figure 2), thus convenient and loading and unloading test cabinet 108 quickly.In some embodiments, sliding part 207 can also be configured to when shaking platform assembly 208 is regained from system 100 fully and make each shaking platform assembly 208 downward-sloping further to be convenient to get into shaking platform 212.In addition; In some embodiments; Test macro 100 can comprise fabricated section, and when shaking platform assembly 208 was positioned at test macro 100 fully, fabricated section was mounted to test macro 100 securely with each shaking platform assembly 208; Discharge from sliding part 207, make the moving-member of sliding part 207 or frailish parts during vibration-testing, can not become tired or introduce beyond thought vibration.In these embodiments, in the time of in shaking platform 212 is installed to system 100, sliding part 207 can keep the one or more couplings in vibration component 208, sidewall 228 and the center wall 230, perhaps can remove sliding part 207.
Can understand after considering the disclosure like those skilled in the art, the layout of air circulator 232 can change, to hold the structure of different test cabinet 108.Shaking platform assembly 208 can correspondingly change with the structure of its corresponding air intake 236 and air out 324 thus.For example; Test cabinet 108 (for example can be organized into row; Each row is made up of at least two test cabinets 108; A test cabinet is arranged in the top of another test cabinet), make air circulator 232 comprise at least one air intake 236 that is used for each row test cabinet 108 and at least one air out 324 that is used for each test cabinet 108.Alternatively, test cabinet 108 can be organized and embark on journey or son row (for example, each row is made up of at least two test cabinets 108, and contiguous another test cabinet of each test cabinet is arranged).And test cabinet 108 does not need in the horizontal direction towards its shaking platform 212; Shaking platform the direction vertical and diagonal angle is also expected.
Fig. 4 D shows some above-mentioned embodiments.Fig. 4 D is compared with Fig. 4 C; Two chambers 108 that comprise the shaking platform assembly 208 that it is associated have been removed, and are substituted by two chambers that comprise the shaking platform assembly 208 ' that it is associated 108 ', and two chambers 108; Disposed adjacent one another, thus the delegation chamber produced.In addition, Fig. 4 D shows the shaking platform 212 that is associated with each shaking platform assembly 208,208 '.The shaking platform that is associated with shaking platform assembly 208 ' have vertical towards but not level towards shaking platform 212.Correspondingly, the actuator in the shaking platform assembly 208 ' from sidepiece but not from bottom influences its shaking platform that is associated.The vertical layout of shaking platform assembly 208 ' can be held more multicell so that the rack of system 100 is compared with other possibility situation.
It should be understood that air circulator 232 and nonessential be closed-loop system.
Fig. 4 E is the front view according to the product test system 100 of embodiment, and wherein product test system 100 has the removable row of being made up of chamber 108 209.In Fig. 4 E, removable row 209 comprise four chambers 108, and each chamber is associated with shaking platform assembly 208, and is as shown in the figure; Yet removable row 209 can comprise the chamber of any amount.Sliding part 207 is convenient to removable row 209 are positioned in the system 100 and/or from system 100, remove, and as stated, after placing removable row 209 in the system 100, can remove sliding part 207.
Fig. 4 F is the front view according to the product test system shown in Fig. 4 E of embodiment, and this product test system has removed removable row 209 and utilized product frame 213 to substitute.Sliding part 207 helps making product frame 213 to be positioned in the system 100 and/or from system 100, removes, and after product frame 213 being placed in the system 100, can remove sliding part 207, as stated.Through applying thermal stress but not vibration, product frame 213 can be used for product to be measured or to be shielded.Skilled person will appreciate that; Test products (does not for example vibrate in system 100; On product frame 213); Simultaneously like products carries out vibration-testing (for example, use in the same system 100 chamber 108) and helps clear and definite comparative heat stress to the influence of reliability and the vibration influence to reliability under identical thermal environment.In embodiment, product frame 213 can adopt shape and/or the size in the system of being suitable for use in 100, to replace chamber 108 or its combination of any amount.
Fig. 5 A to Fig. 5 G shows according to different views some embodiment, that can be included in the shaking platform assembly 208 in the test macro 100.Fig. 5 A to Fig. 5 E shows shaking platform 212, and this shaking platform 212 comprises that seal pad 211, the first sides or installation surface 214 with first side or installation surface 214 can comprise a plurality of stationary installations or fastening point 216.Fig. 5 F and Fig. 5 G show framework 211 ', and framework 211 ' is configured to the sealed fixing device pallet 218 that can be mounted on it with product and is connected.
A plurality of hammers or actuator 520 are interconnected to second side 504 of shaking platform 212.Actuator 520 can be the actuator of any type.For example, can use pneumatic operation actuator, electro-motor actuator, hydraulic actuator and/or can quicken shaking platform 212 or to the device of any other type of shaking platform 212 application of forces and/or other mechanical energies.According to some embodiment, actuator 520 be configured to provide shaking platform 212 about the translation of x axle, y axle and z axle and rotate both motion.Therefore, shaking platform assembly 208 can provide the platform motion with six degree of freedom.As shown in Fig. 5 D and Fig. 5 E, shaking platform bearing 524 can provide contiguous or towards the support that is used for spring 508 or the pillar 528 of second side 504 of shaking platform 212.Can understand after considering the disclosure like those skilled in the art, shaking platform bearing 524 is fixed to rack 104.
Similar with the above description that combines Fig. 2; Though shaking platform 212 is shown as rectangle in Fig. 5 A-5E; But expectedly be; Shaking platform 212, plate 211 and/or framework 211 ' can be bent, are shaped or increase the weight of, when loading product and starting, to change the frequency response of whole shaking platform 212.
In the embodiment in Fig. 5 A-5E, plate 211 is airtight, makes the air separation below the product ambient air that is installed on the installation surface 214 and the plate 211, helps exhaust and product through making actuator and isolates and carry out temperature and control, and is described below.Shaking platform 212 is supported on second side 504 relative with installation surface 214 through one or more support members or platform mounting spring 508, and wherein support member or platform mounting spring 508 are installed within the edge of shaking platform 212.Spring can be the combination in any of compression-type, extension type or blade profile.For example, spring can be positioned at the center of the point 512 at the angle that forms rectangle, and this rectangle itself is positioned at the center (seeing Fig. 5 B) of the rectangle 514 that is limited installation surface 214, and defines 50% zone of the area that equals to be no more than installation surface 214.Through inner installation site being provided for spring 508, be installed in the peripheral shaking platform of perhaps installing of platform with spring and compare near the platform periphery, shaking platform 212 can better support Devices to test.For example, mounting spring 508 is placed the platform that allows near the center of shaking platform 212 more, this can open degree of freedom at the Machine Design and/or the improvement aspect of performance of shaking platform 212.Particularly, the platform that property firm in structure is lower allows shaking platform 212 to realize spectral response widely, has particularly improved the power of 1000Hz lower frequency.
The inside of spring 508 is installed and is also helped that shaking platform 21 comprises framework 211 ' but not the embodiment of plate 2112.Fig. 5 F shows framework 211 ', and this framework 211 ' is configured to the airtight stationary installation pallet 218 that product can be installed above that and is connected.Fig. 5 F comprises the shade of framework 211 ', so that pass the clear of framework 211 ' than macropore, and only airtight stationary installation pallet 218 is expressed as empty profile, and make that the characteristic of passing through of framework 211 ' is visual.Fig. 5 F is also shown in broken lines is used for the attachment point 530 of the actuator and the spring of support frame 211 ', and the position class shown in position and Fig. 5 B seemingly.The peripheral edge of framework 211 ' and platform cover 224 (not shown among Fig. 5 F, as to see Fig. 3 and Fig. 5 G) are connected, but framework 211 ' is because the hole of therefrom passing rather than airtight.When the peripheral edge of stationary installation pallet 218 (for example is connected with framework 211 '; Through stationary installation pallet 218 being fixed to framework 211 ' in stationary installation or fastening point 216 places) time; Stationary installation pallet 218 is accomplished seal 217 with framework 211 ', thereby platform cover, framework 211 ' and stationary installation pallet 218 form continuous airtight surface.Though seal 217 is shown in the inside of fastening point 216; But be contemplated that; Seal 217 can also be formed on the outside of fastening point 216, and the rectangular shape shown in being not limited to, and can be the arbitrary shape of framework 211 ' and 218 realizations of stationary installation pallet.Seal 217 can contact with stationary installation pallet 218 through the flat surfaces of framework 211 ' and simple formation, and the characteristic that liner for example etc. perhaps can be provided is to help gas-tight seal 217.Dotted line 5G-5G representes the plane through the view of Fig. 5 F, and this plane is shown in Fig. 5 G.
Along the line 5G-5G of Fig. 5 F, Fig. 5 G schematically shows stationary installation pallet 218 and how to realize seal 217 with framework 211 ', and show can be used in to the product of testing in the system 100 10 install fixing.Fig. 5 G shows four parts of framework 211 ', like the line 5G-5G finding in Fig. 5 F.Shown in Fig. 5 G, the outermost portion of framework 211 ' seals the edge of platform cover part 224 and 224 '.Therefore, through the outermost portion to 211 ' seals at seal 217 places, the continuous gas-tight seal that stationary installation pallet 218 is accomplished from platform cover part 224 to platform cover part 224 '.Continuous sealing makes air and the air separation above the pallet 218 below the pallet 218; Thereby not with actuator (for example; The exhaust of above-mentioned actuator 520) sending or other gas produce under the situation about disturbing, can be to controlling around product 10,10 ' air themperature.
Fig. 5 G also schematically shows and can be used for product 10,10 ', 10 " (being referred to as product 10) be fixed to the stationary installation 540,540 ', 540 of plate 211 ", 540 ' " (being referred to as stationary installation 540).In other embodiments, it will be appreciated by persons skilled in the art that when not using stationary installation pallet 218 that stationary installation 540 can be fixed to plate 211 (for example, the plate shown in Fig. 5 A to Fig. 5 E 211) with product 10.Stationary installation 540 can comprise the hand welding that is configured to the shape and size of product 10 coupling, magnetic forceps, vacuum forceps, bolt, door bolt; Hinge, button, magnet, electric actuator; Spring is equipped with the equipment of spring, and element such as piece, and/or these combination of elements.For example, the stationary installation shown in Fig. 5 G 540 is that product is remained on the pincers on the device pallet 218; Stationary installation 540 " be the piece that the size and dimension with product 10 ' is complementary, and also stationary installation 540 ' can form by bolt, and this bolt is bolt to stationary installation pallet 218 on the either side of product 10 '.In another embodiment, stationary installation 540 ' " be the two-piece type stationary installation, at 542 places hinged and at 543 places about product 10 " snapping, and fix against plate 211 by the vacuum that the vacuum line 547 through accessory 545 is applied through the downside of slave plate 211.The applicant comprises along the possibility of the vacuum hole that passes this plate 211 definition of " airtight pane 211 "; Need only this hole or (for example be connected to vacuum line; Shown vacuum line 547), it is airtight or (b) being added a cover so that plate 211 is kept from an example to opposite side.It should be understood that stationary installation that vacuum, pneumatic and/or electro-motor activate can help making product 10 to be loaded on the stationary installation 218 automatically and/or directly is loaded on the shaking platform 212.
As stated; Each shaking platform assembly 208 can with the cover 224 related (as shown in Figure 3); (for example make when shaking platform has seal pad 211; Shown in Fig. 5 A to Fig. 5 E) or when sealed fixing device pallet 218 accomplish frameworks 211 ' be sealed across the open area time (shown in Fig. 5 F and Fig. 5 G), 208 formation of shaking platform assembly are held the spring 504 that supports shaking platform 212 and shaking platform 212 are applied the enclosed volume of the actuator 520 of vibration.Therefore, by the chamber atmosphere of air circulator 232 supplies and the air insulated of actuator that centers on shaking platform 520 and spring 508.Therefore, comprise in the situation of pneumatic jack hammer that the air of discharging from actuator 520 does not mix with chamber atmosphere, influences the temperature of chamber atmosphere at actuator 520.As shown in Figure 3, cover 224 can comprise front panel or forward part 226.For the test cabinet 108 that is positioned at another test cabinet 108 tops, cover 224 can also comprise that bottom panel or bottom divide 332 (see figure 3)s.In addition, bottom panel or bottom divide 332 can be separated components, surface that perhaps can involving vibrations stage support 524.
Fig. 6 is the block diagram that illustrates according to the product test system 100 of embodiment.As shown in Figure 6, product test system 100 comprises air circulator 232, shaking platform actuating system 604 and control system 608.Control system 608 receives input 612, and input 612 is supplied to controller 616, with the aspect of the operation of control product test system 100.Controller 616 can as or comprise optional vibrating controller 650, optional temperature controller 660, or comprise the two.(for clear explanation, in Fig. 6, the mark of vibrating controller 650 and temperature controller 660 is abbreviated as " VIBE " and " TEMP " respectively).
In embodiment, controller 616 involving vibrations controllers 650 are used for the vibration that is applied to product to be measured through shaking platform 212 is controlled.For example, vibrating controller 650 can be concurrently controlled the vibration of all platforms 212 of system 100, perhaps can to the subclass of shaking platform 212 or separately platform control.
Input 612 can comprise that the user passes through the input that input media is keyed in, and can also comprise the controlled variable of sequencing.Controller 616 can comprise general purpose programmable processors, have the controller of integrated storer or other processor that is used to execute instruction or computer implemented device.Instruction by controller 616 is carried out can be adopted following form: the user imports, is stored in the instruction of the sequencing in the storer perhaps as the data storage of software and/or the firmware of coding.More particularly, controller 616 can be carried out the control control algolithm, and said control algolithm realizes or comprises PID (PID) control system.In addition, controller 616 can comprise a plurality of processors, memory device and/or logical device.As general description here, control system 608 can provide a signal to air circulator 232 and shaking platform actuating system 604.In addition, control system 608 can be from receiving signal with air circulator 232 and/or shaking platform actuating system 604 related sensors.Control system 608 can also be connected with outer computer through wired or wireless connection 670; Connecting 670 for example can be that network connects (for example, the Internet), makes system 100, control system 609, controller 616, chamber 108 and parts thereof to control through network.
The control signal that is provided to air circulator 232 by control system 608 comprises the signal that is provided to the thermal control element 306 that is arranged in inlet plenum 240.Especially, the control signal that is provided by control system 608 can be instructed thermal control element 306 to heat or cooled off the air in the inlet plenum 240.Control system 608 can also comprise the control signal in order to the operation of control fan 304.In addition, control system 608 can provide control signal with active flow control apparatus 330, and said flow control apparatus includes but not limited to variable outlet 324, variable changed course device 328 or variable air draught regulator 606.As shown in Figure 6, the air of air intake 236 suctions through air circulator 232 is received in the inlet plenum 240, and wherein said air can be by 306 heating of thermal control element or cooling under the instruction of control system 608.In addition, air is aspirated with the mode that strides across thermal control element 306 through air intake 236 and inlet plenum 240 by fan 304.The air of heating or cooling is delivered to downstream chamber 320 by fan 304 then.320 beginnings from the downstream chamber, air passes air out 324 and arrives each test cabinet 108.In the example shown, downstream chamber 320 supply air to the first outlet 324a related with the first test cabinet 108a, with the related second outlet 324b of the second test cabinet 108b, and related n of n test cabinet 108n export 324n.Therefore, the air of heating or cooling is provided for a plurality of test cabinets 108.In addition, air circulator 232 can be configured such that air heating or cooling is supplied to the test cabinet 108 of arbitrary number.The air that is provided to test cabinet 108 is got back to inlet plenum 240 through air in 236 by suction.Alternatively or additionally, air circulator 232 can make the air of surrounding environment get into, or release air into surrounding environment, with the stress level in the control test cabinet 108.
Air circulator 232 can utilize the relevant feedback of control signal that provides with control system 608; This feedback can be through wherein controller 616 and/or optional temperature controller 660 carry out.Especially, one or more test cabinets 108 for example can comprise temperature sensor 620, can send the thermopair of temperature signal to controller 616.Controller 616 (or optional wherein temperature controller 660) can utilize the information about the temperature of test cabinet 108 that is provided by temperature sensor 620 to control thermal control element 306, fan 304 and/or flow control apparatus 330 initiatively, makes the air with desired temperature be provided to test cabinet 108.In the drawings, each test cabinet among temperature sensor 620a, 620b and 620n and the first test cabinet 108a, the second test cabinet 108b and n the test cabinet 108n is related.Therefore, controller 616 can utilize the operation that the round-the-clock temperature signal that provides in the temperature sensor 620 comes control air circulator 232.Alternatively, can be used by controller 616 by the medial temperature of temperature sensor 620 sensings, this controller 616 can be in response to being operated by any signal that provides in the temperature sensor 620.Alternatively, temperature sensor 620 only need be arranged among in the test cabinet 108, can be in order to control air circulator 232 from the signal that this temperature sensor 620 sends.Other the embodiment according to another, temperature sensor 620 can be arranged in another part of air circulator 232, such as being arranged on inlet plenum 240 or being arranged in the downstream chamber 320.Other the embodiment according to another; For example when air out 324 and/or changed course device 328 are comprised as air circulator 232 a part of; Thermopair can be arranged in a plurality of chambers 108 or a plurality of positions in each chamber 108, makes controller 616 can operate to control variable air out 324 and/or changed course device 328.In addition, variable air out 324 and/or variable changed course device 328 can be controlled by controller 616 independently, with other control of branch for the air themperature in the different test cabinets 108.Can also comprise other sensor, with the signal that provides the control used by controller 616 to be associated with air circulator 232.For example, one or more pressure transducers can be arranged in the air circulator 232, to provide a signal to controller 616.
Controller 616 and/or optional temperature controller 650 can also be operated the operation with control shaking platform 208.More particularly, in the example shown in Fig. 6, shaking platform actuating system 604 comprises pneumatic system.Therefore, supply air source 624 provides control air to one group of valve 628.For example, can valve 628 be set for the every group of actuator 520 that is included in the shaking platform assembly 208 with certain orientation.Header 632 is assigned to those actuators 520 with valve 628 air supplied then.Can understand like those skilled in the art.The operation of actuator 520 applies acceleration to platform 212.The gas that actuator 520 is discharged can be collected in the discharge air chamber 636.Air from discharge air chamber 636 can be sent to surrounding environment.Other the embodiment according to another, each exhaust line can be in order to directly to export to surrounding environment with exhaust from actuator 520.
One or more shaking platforms 212 can have the one or more accelerometers 640 that are mounted on it.In embodiment, accelerometer 640 is three axis accelerometers, and this 3-axis acceleration is counted its shaking platform the three-dimensional vibrating feedback is provided.In other embodiments, accelerometer 640 is linear accelerometers that feedback is provided on an axle; In this embodiment, each shaking platform 212 can utilize two or three accelerometers 640 that diaxon or three feedbacks are provided.
Therefore, as shown in Figure 6, each shaking platform 212 can be related with accelerometer (perhaps a plurality of linear accelerometer) 640a, 640b and 640n respectively.Signal from each accelerometer 640 can be provided to controller 616 then, and the mean value of a selecteed signal or said signal can be used by controller 616 in the said signal.According to some embodiment, only needs in the platform 212 are related with accelerometer 640.
The method that is used to provide the product test system according to embodiment has been shown in Fig. 7.This method can be associated through the control algolithm of being carried out by controller 616.According to this method, a plurality of test cabinets 108 are disposed in the shell 104 (step 704).Each test cabinet is related with shaking platform assembly 208.In addition, said shell comprises air circulator 232, and said air circulator 232 comprises at least one inlet 236 and at least one air out 324 that is communicated with each test cabinet 108.Cabinet door 204 is opened to get into a plurality of test cabinets 108 (step 708).At least one device under test or product are arranged and are interconnected to each shaking platform 208 (step 712) then.After device under test all had been interconnected to shaking platform 208, cabinet door 204 was closed (step 716).
Then can begin the operation (step 720) of air circulator.Especially, fan 304 can be opened, with suction air through air in 236, through inlet plenum 240 and stride across or through thermal control element 306.Then, air current heating or cooling is forced 320 flow further downstream along the downstream chamber, flows out air out 324 and flows into test cabinet 108.Forced air flow goes out air out 324 can comprise the air diverts that makes in the downstream chamber 320.More particularly, steering gear can be arranged in the downstream chamber 320, and the downstream of air out 324 are to form contraction flow region, in order to promote air flowing through air out 324.Use steering gear 328 to make the equalization of pressure at air out 324 places, so that identical or approximately uniform air flow and hot state or the pressure device under test in each test cabinet 108 to be provided.Alternatively or additionally, air out 324 and/or the air damper 606 or other the flow control apparatus 330 that can be actively controlled can be provided.
The operation of shaking platform 208 can also begin (step 724) after door 204 is closed.According to some embodiment, shaking platform 208 can make attached device quicken, and attached device is quickened with six degree of freedom.According to these and other embodiments, the acceleration that whole shaking platforms 208 can be operated to apply same train arrives attached device, makes identical stress be applied to device.The control of shaking platform can be associated with the information that accelerometer provides.Accelerometer can be attached in the shaking platform 208.Alternatively, more than one shaking platform 208 or even whole shaking platforms 208 can comprise accelerometer.
In step 728, whether accomplish the working time of test in the step that can confirm carrying out or pre-burning (burn).If accomplish working time, then handle and to finish.Otherwise processing will continue, and reach preset working time (step 732) up to.
Fig. 8 is the block diagram according to some parts of the product test system 100 of other embodiment.More particularly, Fig. 8 shows the air circulator 232 of the illustrative embodiments of many test cabinets 108 systems 100, and wherein system 100 has the first air circulator 232a and the second air circulator 232b.The first air circulator 232a can be related with the first row test cabinet 108, and the second air circulator 232b can be related with secondary series test cabinet 108.In this embodiment, show shared control system 608.Control system 608 receives the input 612 that is supplied to controller 616.Therefore, in some aspects, this control system 608 and the control system 608 in the embodiment that comprises single air circulator 232 are similar.For controlling a plurality of air circulator 232a and the 232b in the embodiment shown in Figure 8 individually, controller 616 can be carried out concurrency control algorithm.These parallel algorithms can realize through the processor that separates, perhaps realize through the single processor of realizing a plurality of virtual machines.Other the embodiment according to another, controller 616 can be realized single processor algorithm, this algorithm provides the independent control for the various parts of air circulator 232a and 232b.For example; The algorithm that controller 616 is carried out can be realized PID control system or algorithm; This control system or algorithm response are operated in the temperature information that is provided by temperature sensor 620a; So that thermal control element 306a and 306b operation, thereby reduce or eliminate in first district that comprises the one or more test cabinets 108 of first row and comprise the temperature difference between second district of the one or more test cabinets of secondary series.As another example; Pid control algorithm can use temperature information from the temperature sensor 620 in the first row test cabinet 108 as elementary input; Can pass through then to add heat to the selection operation of the heating arrangement 308 related and with impulse form with test cabinet 108 row; Make and compare that the temperature sensor 620 related with secondary series has lower temperature with the related temperature sensor 620 of first row.Therefore, the difference algorithm that comprises in the main algorithm can make with multiple row test cabinet 108 in a related thermal control element 306 of row and related air circulator 232a and 232b difference ground operate.
The first air circulator 232a that provides and the second air circulator 232b can provide the heat control of enhancing about the various test cabinets 108 that comprise in the system 100.For example, for each air circulator 232a and 232b, can control thermal control element 306a and 306b, fan 304a and 304b independently.For example; Related at the first air circulator 232a with the first row test cabinet 108; And in the related situation of the second air circulator 232b and secondary series test cabinet 108; Can come control system 100 through the zone, wherein first district comprises that first row test cabinet 108, the second districts related with the first air circulator 232a are associated with the secondary series test cabinet 108 related with the second air circulator 232b.Other the embodiment according to another, air out 324 can comprise the flow control apparatus 330 of ACTIVE CONTROL.These air outs 324 can be by controller 616 in response to the control respectively with those test cabinet 108 related temperature sensors 620, to realize and to keep the desired temperature in each test cabinet 108.Therefore, can adapt to the different thermal loads and/or the hear rate of arranging generation by the difference of the device under test in the test cabinet 108.
Fig. 9 and Figure 10 show the outlet 324 of the test cabinet 108 that comprises flow control apparatus 330, and wherein said flow control apparatus 330 has grid or air hole assembly 904.Grid component 904 can comprise each fluidic or blade 908, in order to the air flow that downstream chamber 320 is provided be directed to related test cabinet 108.Especially, the embodiment shown in Fig. 9 has been integrated the blade 908 of vertical alignment, so that the air along continuous straight runs turns to.Figure 10 shows the air out 324 that comprises the grid component 904 that has blade 908, wherein blade 908 by horizontal arrangement in test cabinet 108, to flow along the vertical direction control air.Each blade 908 can be adjusted to provide the air flow of the particular configuration, number and/or the layout that are suitable for device under test, suitably flows uniformly and/or temperature thereby in the test cabinet that is associated 108, provide.This control can manually be carried out or undertaken by controller 616 instructions.For example, blade 908 can be related with motor or other control actuator in response to the control command operation that is provided by controller 616.
According to other embodiment, grid component 904 can comprise confinement plate and/or vertically, flatly, angled ground or the blade 908 arranged agley.Outside the control flow direction, blade 908 can be in order to providing the different air mass flow zones of different to the test cabinet that is associated 108, and pass through the airflow total amount of test cabinet in order to control.
Figure 11 is Fig. 1, the synoptic diagram of 2,3,4,6 and 8 product test system 100, and it has shown other details of exemplary temperature control in the test cabinet 108.The controller 616 that illustrates has storer 1102, processor 112 and spectrum clock 1114.Storer 1102 can be represented volatile memory (for example, one or both RAM) and in the nonvolatile memory (for example, ROM, FLASH storer).Spectrum clock 1114 for example is the timer of controller 616, and the control cycle of the TEMPERATURE SPECTROSCOPY of its expression system 100 that periodically expires (for example, qualifying part) is accomplished, and new control cycle begins.Control cycle for example is one second time.The spectrum 1107 of the spectrum 1104 of the memory stores that illustrates expectation, daily record data 1106, adjustment and comprise PID1108 and the software of convergence algorithm 1,110 1105.Though being shown as, PID 1108 is stored in the storer 1102; But under the situation that does not break away from the scope of the present disclosure; PID1108 can implement (for example, as hardware, FPGA or other electronic components) at least in part and controlled by controller 616 in the outside of controller 616.The function of processor 1112 executive softwares 1105 to provide controller 616 to be described below.
The spectrum 1104 of an exemplary expectation illustrates to illustrative in Figure 19, and Figure 19 is the chart 1900 of temperature relative time.In chart 1900, spectrum 1104 limited, test cabinet 108 preferred temperatures in time of solid line 1902 expressions as expectation, and the actual temperature of measuring in the dotted line 1904 expression test cabinets 108.Chart 1900 has been described preferred temperature and the actual temperature during the " RUN ", and it comprises that series of temperature changes, and finishes under the identical temperature of the temperature that brings into operation.The temperature cycles that is used for reliability testing usually comprises makes product stand repeatedly this " RUN " continuously.In chart 1900, can find out; In being expressed as 1906 zone; Actual temperature not and the preferred temperature coupling, this regional temperature over time expectation change fast, and in being expressed as 1908 zone; Before turning back to desired temperatures, temperature has surpassed the desired temperatures variation.
Convergence algorithm 1110 for example is to use the iterative processing of the data of daily record data 1106 stored; Daily record data 1106 comprises one or more in temperature value measured, temperature throttling valve, fan throttling valve and the flow throttling valve of the test cabinet 108 that writes down in the operational processs before the system 100, and for example the PID through the temperature error between the chamber temp of measuring is composed with expectation responds and controls.The spectrum 1107 of the data of daily record data 1106 stored, the spectrum 1104 of expectation and adjustment is based on the time; And convergence algorithm 1110 produces adjustable spectrum 1107 one or more in temperature throttling valve, fan throttling valve and the flow throttling valve are defined as time-based throttling setting; Be used for controlling the one or more of thermal control element 306, fan 304 and changeable flow equipment 330, make test cabinet 108 interior actual temperatures follow the spectrum 1104 of expectation.
In operating process, convergence algorithm 1110 will expect that the limiting temperatures of spectrum in 1104 compare with the measurement temperature of daily record data 1106 stored, and adjust the throttling setting of storage up or down based on the difference between the two.For example; If the measurement temperature that is stored in the daily record data 1106 of moment is lower than the limiting temperature in the expectation spectrum 1104; Convergence algorithm 1110 can limit adjustment spectrum 1107 to have the temperature throttling valve so; This temperature throttling valve increases the measurement temperature that (for example, 5%) surpasses daily record data 1106 stored.Similarly, when temperature composed 1104 above expectation, convergence algorithm 1110 can be regulated temperature throttling (for example, 5%) downwards.Then, convergence algorithm 1110 can be carried out in operational process subsequently, so that the throttling valve of error still appears in further adjustment.In the operation that limits number of times (for example; Three operations) afterwards; Throttling setting in the adjustment spectrum 1107 is used as one or more basic controlling in thermal control element 306, fan 304 and the changeable flow equipment 330; And one or more PID functions can be with doing the adjusting of basic controlling, to proofread and correct any further deviation with preferred temperature.For example, PID 1108 can be used for the variation of the thermal mass of any test products of placement in the test cabinet 108 is adjusted.In one embodiment, call convergence algorithm 1110 and be in the limit standard up to the temperature-responsive of measuring, then need further not adjust throttling valve, and controller 616 utilizes the qualification throttling valve of adjustment spectrum 1107.
The output of controller 616 is controlled in the flow throttling 1120 of fan throttling 1118 and changeable flow equipment 330 of temperature throttling 1116, fan 304 of thermal control element 306 one or more alternatively.One or more temperature sensors 620 in one or more test cabinets 108 provide Temperature Feedback to controller 616, thereby allow the temperature and the flow rate of the air 1124 of 616 pairs of entering test cabinets 108 of controller to control.
The temperature of that controller 616 can use is shared (between test cabinet) 306 pairs of a plurality of test cabinets 108 of thermal control element is controlled; Shown in the embodiment of Fig. 6; And/or can control a plurality of air circulators 232, wherein each air circulator 232 comprises thermal control element 306 and one or more test cabinets 108.
Figure 12-the 18th, according to the process flow diagram of embodiment, it shows an illustrative methods 1200 of the temperature in the test cabinet that is used for control chart 1,2,3,4,6 and 8.For example, method 1200 is carried out in the controller 616 of system 100, and is called in each cycle of expectation spectrum 104.
In step 1202, method 1200 is confirmed the spectrum temperature of each test cabinet.In an embodiment of step 1202, controller 616 is confirmed the preferred temperature of test cabinet 108 based on the current period of expectation spectrum 1104.In step 1204, method 1200 reads room temperature.In an embodiment of step 1204, temperature sensor 620 is placed in the specific test cabinet 108, and controller 616 reads the temperature of fc-specific test FC chamber 108 from temperature sensor 620.In another embodiment of step 1204, controller 616 reads temperature from each of a plurality of temperature sensors 620 of being arranged in one or more test cabinets 108, and temperature value measured is got average.
Step 1206 is judged.In step 1206, if method 1200 confirms to have accomplished the above temperature cycle of operation (for example, three operations) of pre-determined number, method 1200 continues step 1220 so; Otherwise method 1200 continues step 1208.
In step 1208, method 1200 is called the temperature throttling submethod 1300 of Figure 13.
Step 1210 is optional.If comprise, then in step 1210, method 1200 is called the fan throttling submethod 1400 of Figure 14.
Step 1212 is optional.If comprise step 1212, method 1200 is called the flow throttling submethod 1500 of Figure 15 so.
Step 1216 is judged.In step 1216, be operation for the first time if method 1200 is confirmed current operation, method 1200 withdraws from so; Otherwise method 1200 continues step 1218.In step 1218, method 1200 utilizes convergence algorithm to confirm the adjustment spectrum, and this adjustment spectrum improves the temperature control of test cabinet.In an embodiment of step 1218; Controller 616 is carried out convergence algorithm 1110 and is handled daily record data 1106 is expected relatively spectrum 1104, thereby confirms the one or more setting in temperature throttling 1116, fan throttling 1118 and the flow throttling 1120 is composed 1107 to form adjustment.
In step 1220, method 1200 is called the temperature control submethod 1600 of the adjustment of Figure 16.
Step 1222 is optional.If comprise, then in step 1222, method 1200 is called the fan control submethod 1700 of the adjustment of Figure 17.
Step 1224 is optional.If comprise, then in step 1224, method 1200 is called the flow control submethod 1800 of the adjustment of Figure 18.Method 1200 stops then.
Method 1200 repeats when the each run of expectation spectrum 1104, with the temperature in the control test cabinet 108.
In step 1302, submethod 1300 stores the room temperature of measuring in the step 1204 in the daily record data into.In an embodiment of step 1302, controller 616 stores the temperature of measuring from temperature sensor 620 in the step 1204 daily record data 1106 that is associated with the current period of expecting to compose 1104 into.In step 1304, submethod 1300 uses the throttling of PID accounting temperature based on the spectrum temperature of confirming in the step 1204 and the temperature of measurement.In an embodiment of step 1304, controller 616 uses processor 1112 to carry out PID 1108 based on the temperature of measuring through temperature sensor 620 in the current period of expecting spectrum 1104 and the step 1204, with the temperature throttling of calculating thermal control element 306.
In step 1306, submethod 1300 stores the temperature throttling of calculating in the daily record data into.In an embodiment of step 1306, controller 616 stores the temperature throttling valve that calculates in the step 1304 in the daily record data 1106 relevant with the current period of expecting to compose 1104 into.In step 1308, submethod 1300 is provided with the temperature throttling of thermal control element.In an embodiment of step 1308, controller 616 is provided with temperature throttling 1116 based on the temperature throttling valve that calculates in the step 1304, with the operation of control thermal control element 306.
Submethod 1300 returns then, continues control method 1200.
In step 1402, submethod 1400 uses PID to calculate the fan throttling based on the temperature throttling of confirming in the spectrum temperature of confirming in the step 1202, the submethod 1300 and the temperature of measurement.In an embodiment of step 1402; Controller 616 is based on the temperature of measuring through temperature sensor 620 in temperature throttling valve of confirming in the current period of expecting spectrum 1104, the submethod 1300 and the step 1204; Use processor 1112 to carry out PID 1108, to calculate the fan throttling valve of fan 304.
In step 1404, submethod 1400 stores the fan throttling valve that calculates in the daily record data into.In an embodiment of step 1404, controller 616 stores the fan throttling valve that calculates in the step 1402 in the daily record data 1106 relevant with the current period of expecting to compose 1104 into.In step 1406, submethod 1400 is provided with the fan throttling of fan.In an embodiment of step 1406, controller 616 is provided with fan throttling 1118 based on the fan throttling valve that calculates in the step 1402, with the operation of control fan 304.
Submethod 1400 returns then, continues control method 1200.
In step 1502, submethod 1500 uses the throttling of PID calculated flow rate based on the fan throttling of confirming in the temperature throttling of confirming in the spectrum temperature of confirming in the step 1202, the submethod 1300, the submethod 1400 and the temperature of measurement.In an embodiment of step 1502; Controller 616 is based on the temperature of passing through temperature sensor 620 measurements in fan throttling valve of confirming in the temperature throttling valve of confirming in the current period of expecting spectrum 1104, the submethod 1300, the submethod 1400 and the step 1204; Use processor 1112 to carry out PID 1108, to calculate the flow throttling valve of changeable flow equipment 330.
In step 1504, submethod 1500 stores the flow throttling valve that calculates in the daily record data into.In an embodiment of step 1504, controller 616 stores the flow throttling valve that calculates in the step 1502 in the daily record data 1106 relevant with the current period of expecting to compose 1104 into.In step 1506, submethod 1500 is provided with the flow throttling of changeable flow equipment.In an embodiment of step 1506, controller 616 is provided with fan throttling 1118 based on the flow throttling valve that calculates in the step 1502, with the operation of control changeable flow equipment 330.
Submethod 1500 returns then, continues control method 1200.
If comprise submethod 1600, submethod 1600 begins to call from the step 1220 of method 1200 so.
In step 1602, submethod 1600 is confirmed the temperature throttling valve according to the adjustment spectrum.In an embodiment of step 1602, controller 616 is confirmed the temperature throttling valve according to adjustment spectrum 1107.In step 1604, submethod 1600 uses the temperature throttling variable of PID accounting temperature throttling based on the temperature in temperature that writes down in the daily record data and the test cabinet.In an embodiment of step 1604; Controller 616 is based on the temperature of the test cabinet 108 of serviceability temperature sensor 620 measurements in temperature that writes down in the step 1302 of submethod 1300 and the step 1204; Use processor 1112 to carry out PID 1108, with accounting temperature throttling variate-value.In step 1606, submethod 1600 will output to the thermal control element through temperature throttling adjustment, step 1602 of the temperature throttling variate-value of step 1604.In an embodiment of step 1606, controller 616 increases to the temperature throttling of confirming in the step 1602 with the temperature throttling variate-value of step 1604, and the result is outputed to temperature throttling 1116 with control thermal control element 306.
Submethod 1600 returns then, continues control method 1200.
If comprise submethod 1700, submethod 1700 begins to call from the step 1222 of method 1200 so.
In step 1702, submethod 1700 is confirmed the fan throttling valve according to the adjustment spectrum.In an embodiment of step 1702, controller 616 is confirmed the fan throttling valve according to adjustment spectrum 1107.In step 1704, submethod 1700 uses PID to calculate the fan throttling variable of fan throttling based on the temperature in temperature that writes down in the daily record data and the test cabinet.In an embodiment of step 1704; Controller 616 is based on the temperature of the test cabinet 108 of serviceability temperature sensor 620 measurements in temperature that writes down in the step 1302 of submethod 1300 and the step 1204; Use processor 1112 to carry out PID 1108, to calculate fan throttling variate-value.In step 1706, submethod 1700 will output to fan through fan throttling adjustment, step 1702 of the temperature throttling variate-value of step 1704.In an embodiment of step 1706, controller 616 increases to the fan throttling of confirming in the step 1702 with the fan throttling variate-value of step 1704, and the result is outputed to fan throttling 1118 with control fan 304.
Submethod 1700 returns then, continues control method 1200.
If comprise submethod 1800, submethod 1800 begins to call from the step 1224 of method 1200 so.
In step 1802, submethod 1800 is confirmed the flow throttling valve according to the adjustment spectrum.In an embodiment of step 1802, controller 616 is confirmed the flow throttling valve according to adjustment spectrum 1107.In step 1804, submethod 1800 uses the flow throttling variable of PID calculated flow rate throttling based on the temperature in temperature that writes down in the daily record data and the test cabinet.In an embodiment of step 1804; Controller 616 is based on the temperature of the test cabinet 108 of serviceability temperature sensor 620 current measurements in temperature that writes down in the step 1302 of submethod 1300 and the step 1204; Use processor 1112 to carry out PID 1108, with calculated flow rate throttling variate-value.In step 1806, submethod 1800 will output to changeable flow equipment through flow throttling adjustment, step 1802 of the flow throttling variate-value of step 1804.In an embodiment of step 1806, controller 616 increases to the flow throttling of confirming in the step 1802 with the flow throttling variate-value of step 1804, and the result is outputed to flow throttling 1120 with control fan changeable flow equipment 330.
Submethod 1800 returns then, continues control method 1200.
Figure 20 is temperature-time diagram 2000, and wherein, solid line 1902 is represented the preferred temperature of test cabinet among Fig. 1 shown in Figure 19,2,3,4,6 and 8, and the desired temperature of the test cabinet 108 of adjustment spectrum 1107 controls among Figure 11 is used in dotted line 2004 representatives.Shown in Figure 200 0, utilize minimum dash down 2006 with the overshoot that reduces, the temperature of test cabinet 108 is more closely followed the preferred temperature of the indicated TEMPERATURE SPECTROSCOPY of line 1902.
Though specific example has illustrated and described the test macro 100 that comprises shell 104, said shell accommodates with three of every row six test cabinets 108 arranging of the mode of two row totally, and the embodiment of this paper is not limited to this structure.Generally, the embodiment of this paper can be applied to be integrated with any test macro 100 of a plurality of test cabinets 108.In addition, though show the shell 104 that only has access door 204, some embodiments can have the door that is configured to allow as required or gets into test cabinet 108 for specific use or convenient in application ground.According to the embodiment that utilizes shared control unit 616, controller 616 can be operated through single copy or the instance of carrying out control algolithm.Therefore, test cabinet 108 can be provided the air of thermal control, and the shaking platform 212 in each test cabinet 108 can use single controller 616 and control algolithm to operate in a similar fashion.In conjunction with such embodiment, with in the test cabinet 108 any or provide temperature information to controller 616 with the temperature sensor 620 of any other partial association in the air circulator 232.With any the related single accelerometer 640 in the platform 212 can be with thinking that controller 616 provides acceleration information.According to such embodiment, advantageously, test cabinet 108, shaking platform assembly 208 with attached device under test construct identically.Although the various examples that provide have been discussed the use of pneumatic actuator 520, also can use the actuator of other type here.

Claims (52)

1. product test system comprises:
A plurality of shaking platforms controlledly are installed on the product on the said shaking platform with vibration; And
Air circulator is controlled the air themperature of said product surrounding air.
2. system according to claim 1 is characterized in that also comprising:
System controller is controlled said air themperature and the vibration that is applied to said shaking platform.
3. system according to claim 2 is characterized in that said system controller comprises the vibrating controller of controlling said vibration.
4. system according to claim 3 is characterized in that, said vibrating controller can be operated the vibration with the one or more subclass in the vibration of controlling all shaking platforms in (a) a plurality of shaking platforms respectively or control (b) a plurality of shaking platforms.
5. system according to claim 1 is characterized in that, said system controller comprises:
Temperature controller is controlled said air circulator to adjust said air themperature.
6. system according to claim 1; It is characterized in that; Said air circulator has at least one thermal control element, pipeline and at least one fan, and said at least one thermal control element, said pipeline and said at least one fan collaborative work are to adjust said air themperature.
7. system according to claim 6 is characterized in that, said thermal control element comprise in heating element and the cooling element one of.
8. system according to claim 6 is characterized in that, said thermal control element comprises stratie.
9. system according to claim 1 is characterized in that, said air circulator is configured to adopt cryogenic liquid to cool off said product.
10. system according to claim 9; It is characterized in that; After said air circulator was configured to adopt air at room temperature to blow to annotate the pairing chamber of said product through (a), then (b) adopted said cryogenic liquid that said product is cooled off from the temperature higher at least 20 degrees centigrade than room temperature.
11. system according to claim 1 is characterized in that, one or more can from system, the removing in said a plurality of shaking platforms.
12. system according to claim 1 is characterized in that also comprising:
The rack that holds said shaking platform, one or more in the said shaking platform can slip into or skid off said rack.
13. system according to claim 12 is characterized in that, said shaking platform slips into or skids off said rack through sliding part, linear bearing, roller bearing or wheel.
14. system according to claim 13 is characterized in that, when packing said shaking platform into said system, said sliding part, linear bearing or roller bearing can be removed from said system.
15. system according to claim 12 is characterized in that also comprising:
Fabricated section is mounted in the said shaking platform each in the said system securely.
16. system according to claim 1 is characterized in that also comprising:
Stationary installation can be operated so that said product is mounted to said shaking platform.
17. system according to claim 16 is characterized in that said stationary installation comprises the one or more elements in the following element: be configured to the hand welding with the shape and size of said product coupling, magnetic forceps, vacuum forceps; Bolt, door bolt, hinge; Button, magnet, electric actuator; Spring is equipped with the equipment of spring, and locatees link stopper.
18. system according to claim 1 is characterized in that also comprising:
A plurality of chambers, each in said a plurality of chambers is surrounded one of said shaking platform, and has the controllable actuator that produces the vibration that is applied to said product.
19. system according to claim 18 is characterized in that, said air circulator is configured to and is the said air themperature of the independent control of each said chamber.
20. system according to claim 18 is characterized in that, at least two chambers in said a plurality of chambers have different size or shape.
21. system according to claim 18 is characterized in that, at least one shaking platform in said a plurality of shaking platforms is along the wall or the top configuration of its chamber.
22. system according to claim 18; It is characterized in that; Said air circulator comprises the air-flow blade that can control, said air-flow blade can operate with the flow rate through the air of at least one chamber in said a plurality of chambers of convection current selectively with one of flow to or all adjust.
23. system according to claim 18 is characterized in that, thereby at least one chamber in said a plurality of chamber is arranged in the top formation column of cavities of another chamber.
24. system according to claim 23 is characterized in that also comprising the rack that holds said chamber, said rack comprises at least one access door that is used for said row.
25. system according to claim 24; It is characterized in that; Said access door comprises a plurality of access door; Each access door in wherein closed said a plurality of access door is isolated one or more chambers and the room air in said a plurality of chamber, and opens at least one access door and can not change the isolation with the corresponding chamber of at least one other access door.
26. system according to claim 24 is characterized in that, the height of one or more chambers in said rack can be adjusted vertically.
27. system according to claim 24 is characterized in that, said row can remove from said rack, and said system also comprises the product frame, are used to be placed on the position at row in the said rack, that be removed place; Thereby under controlled air themperature, can product be placed on the said product frame in the said rack.
28. system according to claim 24; It is characterized in that; For in said a plurality of chambers each; Said system also comprises a plurality of actuators, and at least one actuator is configured to and collides its shaking platform separately from the side to reduce the required vertical cabinet space of said actuator, in said rack, stays greater room for adjacent chamber.
29. system according to claim 24 is characterized in that, in said a plurality of chambers each, said system also comprises no screw thread side plate, is used to make oscillation actuator to separate on environment with shaking platform separately.
30. system according to claim 29 is characterized in that, said oscillation actuator comprises pneumatic actuator, wherein said side plate and chamber formation labyrinth sealing separately.
31. system according to claim 24 is characterized in that, said air circulator comprises the air-flow chamber that interlocks, thereby flows for each chamber in the said row provides uniformly, and said plenum chamber is shaped at the rear wall place of said rack.
32. system according to claim 31 is characterized in that, the vibration of the platform in the said row can be that the unit is controlled with the group.
33. system according to claim 31; It is characterized in that; The staggered plenum chamber of said air-flow links to each other with each chamber in the said row through air out, and apart from the area of the farther air out of the fan of the said air actuator area less than the nearer air intake of the said fan of distance.
34. system according to claim 24 is characterized in that also comprising controller, is used for the control air temperature and for the vibratory output of each shaking platform of chamber, each chamber in said a plurality of chambers comprises:
(a) at least one thermocouple provides the temperature survey feedback to said controller, and
(b) at least one accelerometer provides Accelerator Feedback to said controller.
35. system according to claim 34 is characterized in that, said at least one accelerometer comprises three axis accelerometer, and said three axis accelerometer can be operated and think that its shaking platform provides the three-dimensional vibrating feedback.
36. system according to claim 34; It is characterized in that; Said at least one accelerometer is first linear accelerometer; And said system also comprises second linear accelerometer perpendicular to said first linear accelerometer, and said second linear acceleration is counted its shaking platform the twin shaft feedback is provided.
37. system according to claim 18 is characterized in that, the temperature of at least one chamber in said a plurality of chambers can be through network control with vibration.
38. system according to claim 1 is characterized in that, each shaking platform in said a plurality of shaking platforms comprises:
Framework is connected with oscillation actuator, and
The stationary installation pallet is connected with said product, and said framework and said stationary installation pallet are configured to (a) and in said system, link together securely, perhaps (b) thus separate with said system said stationary installation pallet can be removed from said system.
39., it is characterized in that said framework comprises isolates the seal pad of said product ambient air to prevent to discharge from actuator according to the described system of claim 38.
40. according to the described system of claim 38; It is characterized in that; Said framework does not seal, and said stationary installation pallet seals, and makes that said stationary installation pallet is mounted to said lframe cross piece discharges from actuator preventing from said product ambient air.
41., it is characterized in that each shaking platform in said a plurality of shaking platforms comprises two-layer according to the described system of claim 38;
Ground floor in two-layer forms the framework that is connected with oscillation actuator,
The second layer in two-layer forms the stationary installation pallet, be used for product is installed in said stationary installation pallet, and said system also comprises rack and a plurality of chamber that each chamber comprises the said second layer, makes
(a) when each shaking platform of said system two-layer linked together securely, said chamber separated on said rack internal environment, perhaps
(b) when the two separate of each shaking platform of said system, said chamber can remove from said rack.
42. system according to claim 1 is characterized in that, at least one shaking platform in said a plurality of shaking platforms can move vertically and selectively.
43. system according to claim 1 is characterized in that, at least one shaking platform in said a plurality of shaking platforms is non-configuration flatly in said system.
44. system according to claim 1; It is characterized in that also comprising rack and a plurality of chamber; Each chamber in said a plurality of chamber surrounds one of said shaking platform and has the actuator that causes the platform vibration that can control separately; Said air circulator is configured each chamber of making in said a plurality of chamber control air temperature separately, and the height of each chamber in said rack can be adjusted.
45., it is characterized in that at least two chambers in said a plurality of chambers are networked together and are used for shared vibration and air themperature operation according to the described system of claim 44.
46. system according to claim 1 is characterized in that also comprising the electric actuation stationary installation, said electric actuation stationary installation can be operated to make product be attached to each platform automatically at least in part.
47. system according to claim 1; It is characterized in that; At least one shaking platform one of comprises in electromagnet and the vaccum suction pipe or all, said electromagnet and said vaccum suction pipe can be controlled selectively product be attached to said vacuum platform and alternatively product discharged from said shaking platform.
48. system according to claim 1 is characterized in that, said product comprises the electronic product that has stationary installation or do not have stationary installation.
49. system according to claim 1 is characterized in that, at least one shaking platform in said a plurality of shaking platforms is bent, is shaped or increases the weight of, to change the frequency response of said at least one shaking platform on the zone at said platform when starting.
50. system according to claim 1 is characterized in that, said air circulator comprises a plurality of tangential fans, and the product of each fan in chamber in said a plurality of tangential fans provides air-flow, and said chamber is arranged to vertical row.
51., it is characterized in that said tangential fan is along the common drive axis configuration that is driven by engine and/or band according to the described system of claim 50.
52. system according to claim 1 is characterized in that, said air circulator comprises centrifugal blower.
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US12/896,254 US8485039B2 (en) 2010-10-01 2010-10-01 Method and apparatus for thermal control of a multiple chamber test system
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US12/896,245 2010-10-01
US13/209,136 US8616063B2 (en) 2010-10-01 2011-08-12 Method and apparatus for thermal control of a multiple chamber test system
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