CN201314856Y - Low air pressure and vibration combined test vibration table center maintaining device - Google Patents
Low air pressure and vibration combined test vibration table center maintaining device Download PDFInfo
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- CN201314856Y CN201314856Y CNU200820199288XU CN200820199288U CN201314856Y CN 201314856 Y CN201314856 Y CN 201314856Y CN U200820199288X U CNU200820199288X U CN U200820199288XU CN 200820199288 U CN200820199288 U CN 200820199288U CN 201314856 Y CN201314856 Y CN 201314856Y
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Abstract
The utility model discloses a low air pressure and vibration combined test vibration table center maintaining device, relating to mechanics environmental test device field. The utility model designs the inner room of the electrical vibration table body into an enclosed rigid gas chamber; the platform is positioned at the vibration center in the vertical vibration test or horizontal vibration test and is supported by the floating balance of the pressure in the low pressure test box on one end of the platform and the pressure in the rigid gas chamber on the other end of the platform. A measuring device is adopted to test the distance and direction of the deviation of the static and dynamic platform to the theoretical vibration center. A gas feeding circuit and two gas drawing circuits are adopted for the gas feeding and drawing of the rigid gas chamber to maintain the platform at the vibration center during test. The utility model is applicable to the vertical vibration composite test and the horizontal vibration composite test. During the combined test, the vibration table is maintained at the vibration center automatically. More particularly, when the test low pressure is in variation, the vibration table can still be maintained at the vibration center.
Description
Technical field
The utility model relates to the combinational environment vibration rig in the dynamic environmental test equipment, particularly the center holding device of vibration table in infrabar and the vibration composite test equipment.This device can keep vibration table to be in the center of displacement all the time in composite testing is carried out automatically, when particularly testing infrabar and being in variable condition, also can make vibration table be in the center of displacement all the time.
Background technology
Electric vibration table is a kind of testing equipment of analog vibration mechanical environment.Low pressure test chamber is a kind of testing equipment of simulating hypobaric.In the past because the restriction of testing equipment, test products (as equipment and devices such as electronic devices and components, instruments) is carried out the vibration simulation test and the infrabar simulation test is normally carried out respectively.The method of testing respectively also can be found the defective of existence in the product design manufacturing, if but test specimen is applied to aerospace field, composite testing can be found more problems of existence in the product design manufacturing more near physical environment, and this point is proved by practice.
Infrabar and vibration composite test are the tests that electric vibration table and low pressure test chamber are combined and be engaged in.The table top of electric vibration table stretches in the low pressure test chamber in the test, and the test products clamping and is in the low pressure test chamber on table top, simulation hypobaric in analog vibration.When air pressure reduces or when infrabar returns to 1 atmospheric pressure gradually gradually since 1 atmospheric pressure, just can simulated aircraft and the lift-off of spacecraft or land residing infrabar and vibration compound mechanics environment.
As shown in Figure 1, because the table top 2 fixedly connected moving-coils 3 (drive coil) of existing electric vibration table, the rubber pneumatic bag formula air spring 13 that the weight of test products, table top 2 and moving-coil 3 is installed by moving-coil 3 belows supports, and stage body 1 inside is communicated with atmosphere.In infrabar and vibration composite test, because the air pressure in the low pressure test chamber changes≤1 barometric pressure range, therefore test products, table top 2 and moving-coil 3 can move upward under the external air pressure effect, make table top 2 vertical direction of vibration work upwards depart from position, the centre of oscillation, cause composite testing normally to carry out.For this reason, how keeping the center of electric vibration table table top 2 automatically at the air pressure change in the low pressure test chamber is problems of the utility model research.
Summary of the invention
The utility model provides a kind of infrabar and vibration composite testing vibration table surface center holding device, when its objective is that will solve the low pressure test chamber internal gas pressure changes, automatically keep the center problem of electric vibration table table top on vertical vibration direction or horizontal vibration direction, infrabar and vibration composite test are normally carried out.
For achieving the above object, the technical solution adopted in the utility model is: a kind of infrabar and vibration composite testing vibration table surface center holding device, and its innovation is:
Rigidity air chamber in a sealing of electric vibration table stage body inner space design, the centre of oscillation position of table top in vertical vibration test or horizontal vibration test is by the unsteady balanced support of low pressure test chamber air pressure that is positioned at table top one end and the rigidity air chamber air pressure that is positioned at the table top other end;
Have an air pressure to be higher than the source of inflation gas of rigidity air chamber internal gas pressure all the time, this source of inflation gas is connected to the rigidity air chamber by one road pipeline and ventilating control valve, forms the inflation gas circuit that a road direction rigidity air chamber is inflated; There is an air pressure to be lower than the source of the gas of bleeding of rigidity air chamber internal gas pressure all the time, this source of the gas of bleeding is parallel-connected to the rigidity air chamber by the two-way pipeline and the operation valve of bleeding, form the gas circuit of bleeding that two-way is bled to the rigidity air chamber, wherein one the tunnel is first gas circuit of bleeding, first bleed the operation valve of bleeding in the gas circuit is first operation valve of bleeding, another road is second gas circuit of bleeding, and second bleed the operation valve of bleeding in the gas circuit is second operation valve of bleeding;
There is a table top center position measurement device to be used for detecting table top distance and direction static and dynamically position, the deviation theory centre of oscillation, this table top center position measurement device is mainly by survey sensor, signal processing circuit and controller are formed, survey sensor is located on the corresponding electric vibration table stage body of table vibration center position measurement point, the output signal of survey sensor is connected with the input end of signal processing circuit, the output terminal of signal processing circuit is connected with the controller input end, the output terminal of controller respectively with the ventilating control valve, first operation valve of bleeding is connected with second control end of bleeding operation valve.
Related content in the technique scheme is explained as follows:
1, in the such scheme, described " rigidity air chamber " is meant that the airtight container that constitutes air chamber is a rigid structure, do not have elastic deformation in theory.And the weight of table top, moving-coil and the test products of original electric vibration table supports (seeing the air spring 13 among Fig. 1) by the rubber pneumatic bag formula air spring that is installed in the moving-coil below.And the relative external atmosphere pressure of air pressure in the air spring is to work in barotropic state.In infrabar and vibration composite test, because the air pressure in the low pressure test chamber is less than or equal to 1 atmospheric pressure, therefore when the relative external atmosphere pressure of the air pressure in the air spring is in negative pressure, use the air bag contraction of air spring not have equilibrium activity, the center that can't keep table top.Here it is this programme cancellation air spring, and whole stage body inner space as a rigidity air chamber reason.Could carry out negative pressure ventilation to the rigidity air chamber in the stage body like this, play equilibrium activity, thereby keep the center of vibration table.
2, in the such scheme, described " low pressure test chamber " is a kind of test casing of simulating hypobaric, and it belongs to prior art.In infrabar and vibration composite test, low pressure test chamber will just can carry out composite testing with the electric vibration table combination.Low pressure test chamber static air pressure at work is between 1 atmospheric pressure～vacuum, and dynamic air pressure has two kinds of variation tendencies, and first kind is that air pressure is changed to low by height, and second kind is that air pressure changes from low to high.These two kinds of variations all can cause position, the table top deviation theory centre of oscillation.When the air pressure in the low pressure test chamber by height during to low the variation, table top is to the skew of low pressure test chamber direction, on the contrary table top is offset to rigidity air chamber direction.
3, in the such scheme, described " infrabar and vibration composite test " comprises two kinds of situations.First kind is that the direction of vibration of composite testing is a vertical direction, can be described as " vertical vibration composite testing ".In the vertical vibration composite testing, low pressure test chamber is positioned at table top top, and the rigidity air chamber is positioned at the table top below, the direction of position, the table top deviation theory centre of oscillation for upwards depart from or downward bias from.Second kind is that the direction of vibration of composite testing is a horizontal direction, can be described as " horizontal vibration composite testing ".In the horizontal vibration composite testing, low pressure test chamber is positioned at table top left side (or right side), and the rigidity air chamber is positioned at table top right side (or left side), and the direction of position, the table top deviation theory centre of oscillation is for departing to the left or departing to the right.The utility model technology all is applicable to both of these case.
4, the principle of work of such scheme is:
(1) according to the volume size of low pressure test chamber and the rate of change situation of low pressure test chamber internal gas pressure, is that benchmark is divided into two grades of controls to the distance of low pressure test chamber deviation in driction with table top with position, the theoretical centre of oscillation, first grade of expression to the distance of low pressure test chamber deviation in driction less than certain setting value situation, second grade of expression to the distance of low pressure test chamber deviation in driction more than or equal to certain setting value situation.
(2) utilize a table top center position measurement device to detect table top distance and direction static and dynamically position, the deviation theory centre of oscillation, and with controller of measurement result input, when table top during to rigidity air chamber deviation in driction, controller starts the inflation gas circuit by the ventilating control valve and inflates to the rigidity air chamber, table top is moved to the low pressure test chamber direction, when moving playing surface position, the theoretical centre of oscillation, stop; When table top to the low pressure test chamber deviation in driction and when dropping on described first grade of range of control, controller starts first gas circuit of bleeding the rigidity air chamber is bled by first operation valve of bleeding, table top is moved to rigidity air chamber direction, when moving playing surface position, the theoretical centre of oscillation, stop; When table top to the low pressure test chamber deviation in driction and when dropping on described second grade of range of control, controller starts first gas circuit and second gas circuit of bleeding of bleeding simultaneously the rigidity air chamber is bled by first operation valve and second operation valve of bleeding of bleeding, perhaps controller only starts second gas circuit of bleeding the rigidity air chamber is bled by second operation valve of bleeding, table top is moved to rigidity air chamber direction, when moving playing surface position, the theoretical centre of oscillation, stop.
5, in the such scheme, why adopt first via gas circuit and the second tunnel this two-way of the gas circuit method that gas circuit bleeds to the rigidity air chamber of bleeding of bleeding of bleeding, be because low pressure test chamber is in normal pressure or air pressure when not too low, table top can make table top remain on the center to the distance of low pressure test chamber deviation in driction little (being not more than 2mm such as the distance that departs from) as long as there is the one road small-bore gas circuit of bleeding that the rigidity air chamber is bled.Gas circuit is worked simultaneously if two-way is bled, and rate of air sucked in required is excessive, and such as in the vertical vibration composite testing, two-way is worked simultaneously, and one bleeds makes table top low excessively, and an inflation makes table top too high again, will cause and constantly fill exhaust, makes table top be in oscillatory regime.And when the air pressure of rigidity air chamber and low gas test pressure case hangs down, only not enough with the one road small-bore gas circuit unit interval rate of air sucked in required of bleeding, table top can not arrive the center for a long time, therefore adopt the two-way gas circuit of bleeding to work simultaneously, perhaps adopt one bigbore second gas circuit of bleeding separately, can shorten the time of bleeding, table top is recentered rapidly.
6, in the such scheme, why adopt one tunnel inflation gas circuit to be because there is time enough to be used for inflating under the static state of table top before beginning to vibrate, and the hyperbar of low pressure test chamber is 1 atmospheric pressure, in composite testing table top downward bias from distance little, therefore as long as adopt one tunnel inflation gas circuit just can meet the demands, needn't adopt two kinds of inflation gas circuits.
7, in the such scheme, described second bleeds can adopt proportioning valve to control rate of air sucked in required in the gas circuit, realizes the rate of air sucked in required control of this gas circuit.
8, in the such scheme, described survey sensor is current vortex sensor or photoelectric sensor.When survey sensor adopts current vortex sensor, table top center position measurement device can be with reference to Chinese patent ZL200520074318.0, name is called " the static and dynamic retainer in electric vibration table table top center ", and publication number is the disclosed content of the utility model patent of CN2819203Y.Here no longer be repeated in this description.
9, in the such scheme, for the ease of observing, a table top center indicator can be set, the input end of this indicator is connected with the output terminal of controller, is used to indicate the distance and the direction of position, the table top deviation theory centre of oscillation.Because table top is arranged in low pressure test chamber during electric vibration table work, can not find out intuitively whether table top is in position, the theoretical centre of oscillation.The center indicator can indicate clearly position, the deviation theory centre of oscillation apart from size and Orientation.
Because the technique scheme utilization, the utility model compared with prior art has following advantage and effect:
1, the utility model is from the angle of system, and table top keeps the center scheme when having formulated infrabar and vibration composite test comprehensively, and particularly following 2 can be good at embodying the utility model substantive distinguishing features:
(1) electric vibration table stage body inner space is designed to the rigidity air chamber of a sealing, the centre of oscillation position of table top in vertical vibration test or horizontal vibration test is by the unsteady balanced support of low pressure test chamber air pressure that is positioned at table top one end and the rigidity air chamber air pressure that is positioned at the table top other end;
(2) adopt the two-way gas circuit of bleeding, and select the different schemes of bleeding to satisfy the needs of actual rate of air sucked in required in conjunction with table top to the distance size of low pressure test chamber deviation in driction, therefore preferably resolve the problem that dynamically departs from the table top center that low pressure test chamber air pressure changes from high to low or from low to high and rate of change produced.
2, the utility model design concept novelty is ingenious, and implementation is simple and practical, and the practical problems that the table top center changes when efficiently solving infrabar and vibration composite test has outstanding substantive distinguishing features and significant technical progress.
Description of drawings
Accompanying drawing 1 is the existing electric vibration table stage body structural drawing that is supported by rubber air spring;
Accompanying drawing 2 is the electric vibration table stage body structural drawing of the utility model by the rigidity air chamber support of stage body inside;
Accompanying drawing 3 is the utility model embodiment 1 principle schematic;
Accompanying drawing 4 is the schematic diagram of gas circuit of bleeding that fills of the utility model embodiment 1 rigidity air chamber;
Accompanying drawing 5 is the embodiment of the invention 2 principle schematic.
In the above accompanying drawing: 1, stage body; 2, table top; 3, moving-coil; 4, rigidity air chamber; 5, magnetic cylinder ring; 6, go up cover; 7, cover down; 8, sealing and dustproof film; 9, central magnetic pole; 10, field coil; 11, upper block structure; 12, lower tumbler structure; 13, air spring; 14, test products; 15, low pressure test chamber; 16, survey sensor; 17, ventilating control valve; 18, first operation valve of bleeding; 19, second operation valve of bleeding; 20, horizontal sliding table; 21, slide unit table top; 22, pedestal.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described:
Embodiment 1: a kind of in infrabar and vertical vibration composite testing the center holding device of vibration table
As shown in Figures 2 and 3, electric vibration table stage body 1 inner space is designed to the rigidity air chamber 4 of a sealing, the centre of oscillation position of test products 14 on table top 2 and the table top 2 in the vertical vibration test supported by the unsteady balance of low pressure test chamber 15 air pressure that are positioned at the top and rigidity air chamber 4 air pressure that are positioned at the below.
The source of inflation gas (see figure 3) that an air pressure is higher than rigidity air chamber 4 internal gas pressures all the time is set.This source of inflation gas can be understood as an air chamber that is full of pressure air, and the pressure air of this air chamber is formed to the air chamber inflation by inflator pump, also can be understood as an inflator pump, and this inflation delivery side of pump forms high-pressure aerated source of the gas.This source of inflation gas is connected to rigidity air chamber 4 by one road pipeline and ventilating control valve 17, thereby forms the inflation gas circuit that a road direction rigidity air chamber 4 is inflated.
The source of the gas (see figure 3) of bleeding that an air pressure is lower than rigidity air chamber 4 internal gas pressures all the time is set.This source of the gas of bleeding can be understood as an infrabar or vacuum room, and the air pressure of this air chamber is bled to air chamber by aspiration pump and formed, and also can be understood as an aspiration pump, and this delivery side of pump of bleeding forms low pressure source of the gas of bleeding.This source of the gas of bleeding is parallel-connected to rigidity air chamber 4 by the two-way pipeline and the operation valve of bleeding, thereby forms the gas circuit of bleeding that two-way is bled to rigidity air chamber 4.Wherein, the one tunnel is first gas circuit of bleeding, and first bleed the operation valve of bleeding in the gas circuit is first operation valve 18 of bleeding, and another road is second gas circuit of bleeding, and second bleed the operation valve of bleeding in the gas circuit is second operation valve 19 of bleeding.
According to the volume size of low pressure test chamber 15 and the rate of change situation of low pressure test chamber internal gas pressure, is that the distance that benchmark upwards departs from is divided into two grades of controls with table top with position, the theoretical centre of oscillation, the distance that first grade of expression upwards departs from is less than the 2mm situation, and the distance that second grade of expression upwards departs from is more than or equal to the 2mm situation.
Utilize a table top center position measurement device to detect table top distance and direction static and dynamically off-center position.This table top center position measurement device mainly is made up of survey sensor 16, signal processing circuit and controller, survey sensor 16 adopts current vortex sensor, table top center position measurement device can be with reference to Chinese patent ZL 200520074318.0, name is called " the static and dynamic retainer in electric vibration table table top center ", and publication number is the disclosed content of the utility model patent of CN2819203Y.Here no longer be repeated in this description.Current vortex sensor is located on the corresponding electric vibration table stage body 1 of table top center position measurement point, the output signal of current vortex sensor is connected with the input end of signal processing circuit, the output terminal of signal processing circuit is connected with the controller input end, and the output terminal of controller is connected with second control end of bleeding operation valve 19 with ventilating control valve 17, first operation valve 18 of bleeding respectively.(see figure 3) in the work, survey sensor 16 and signal processing circuit are imported controller with measurement result, when table top 2 downward bias decentering positions, controller starts the inflation gas circuit to 4 inflations of rigidity air chamber by ventilating control valve 17, table top 2 is moved up, when table top 2 rises to position, the theoretical centre of oscillation, stop; When table top 2 off-center position and when dropping on first grade of range of control (distance that departs from is less than 2mm) upwards, controller starts first gas circuit of bleeding rigidity air chamber 4 is bled by first the bleed operation valve 18, table top 2 is moved down, when table top 2 drops to position, the theoretical centre of oscillation, stop; When table top 2 off-center position and when dropping on second grade of range of control (distance that departs from is more than or equal to 2mm) upwards, controller starts first gas circuit and second gas circuit of bleeding of bleeding simultaneously rigidity air chamber 4 is bled by first operation valve 18 and second operation valve 19 of bleeding of bleeding, perhaps controller only starts second gas circuit of bleeding rigidity air chamber 4 is bled by second the bleed operation valve 19, table top 2 is moved down, when table top 2 drops to position, the theoretical centre of oscillation, stop.
In order to better meet the needs of different rates of air sucked in required, above-mentioned first gas circuit and second gas circuit of bleeding of bleeding can adopt the gas circuit of different bores, and wherein, first gas circuit of bleeding adopts small-bore gas circuit, is 1/4 inch such as bore; Second gas circuit of bleeding adopts the heavy caliber gas circuit, is 1 inch such as bore.Bleed and adopt in the gas circuit proportioning valve to realize the rate of air sucked in required control of this gas circuit in order to control rate of air sucked in required second.
For the ease of observing, a table top center indicator can be set, the input end of this indicator is connected with the output terminal of controller, is used to indicate the distance and the direction of position, the table top deviation theory centre of oscillation.Because table top is arranged in low pressure test chamber during electric vibration table work, can not find out intuitively whether table top is in position, the theoretical centre of oscillation.The center indicator can indicate clearly position, the deviation theory centre of oscillation apart from size and Orientation.
As shown in Figure 4, in the present embodiment, ventilating control valve 17 is a two-bit triplet solenoid valve V3, and first operation valve 18 of bleeding is a two-bit triplet solenoid valve V2, and second operation valve 19 of bleeding is a two-bit triplet solenoid valve V4.Another two-bit triplet solenoid valve V1 be used for according to table top 2 upwards depart from downward bias from situation, switch between the gas circuit in inflation gas circuit and bleeding.The gas circuit of the different bores of present embodiment employing two-way is inflated rigidity air chamber 4 or is bled, and its principle of work is as follows:
1, low pressure test chamber 15 normal pressure work, when table top 2 was higher, two-bit triplet solenoid valve V1 obtained the control signal that table top 2 upwards departs from, two-bit triplet solenoid valve V1 conversion, rigidity air chamber 4 recenters vibration table surface 2 through V1-V2-throttling valve-exhaust in atmosphere.
2, low pressure test chamber 15 normal pressure work, when table top 2 is low, two-bit triplet solenoid valve V3 obtain table top 2 downward biases from control signal, two-bit triplet solenoid valve V3 conversion, source of inflation gas is through air cleaner, two-bit triplet solenoid valve V3 and two-bit triplet solenoid valve V1, rigidity air chamber 4 inflations to stage body 1 recenter vibration table surface.
Above-mentioned 1 and 2 two kind of situation under, the air pressure in the low pressure test chamber 15 are normal pressure, do not enter the infrabar duty, but this situation also have practical meaning.Because temperature and humidity compbined test function that low pressure test chamber is compound usually when carrying out temperature, humidity and vibration composite test, is exactly above-mentioned 1 and 2 working condition.
3, when carrying out infrabar and vibration composite test, when the center of table top 2 is upwards departed from less than 2mm, two-bit triplet solenoid valve V2 is changed by the infrabar control signal, two-bit triplet solenoid valve V1 conversion, the source of the gas of bleeding is bled to rigidity air chamber 4 through two-bit triplet solenoid valve V2 and two-bit triplet solenoid valve V1.
4, when carrying out infrabar and vibration composite test, when the center of table top 2 was upwards departed from more than or equal to 2mm, small-bore gas circuit can not have been extracted the gas in the rigidity air chamber 4 rapidly out, reached the purpose of balance.At this moment, two-bit triplet solenoid valve V4 conversion, the heavy caliber gas circuit is opened.Rigidity air chamber 4 is worked simultaneously and is finished the task of bleeding jointly by the two-way gas circuit of bleeding, and makes vibration table surface 2 get back to the center of setting rapidly.
Embodiment 2: a kind of in infrabar and horizontal vibration composite testing the center holding device of vibration table
As shown in Figure 5, the difference with embodiment 1 is: first point, horizontal vibration are tested needs to increase horizontal sliding table 20, and horizontal sliding table 20 is slidingly connected in the horizontal direction by slide unit table top 21 and pedestal 22 two parts and constitutes (for prior art).Second point turns over the stage body 1 of electric vibration table and turn 90 degrees, and then the table top on the electric vibration table stage body 12 is connected with the slide unit table top 21 of horizontal sliding table 20, drives slide unit table top 21 with electric vibration table and is engaged in vibration test in the horizontal direction.Thirdly, test products 14 is installed on the slide unit table top 21 of horizontal sliding table 20, and is positioned at low pressure test chamber 15, and the rigidity air chamber 4 in low pressure test chamber 15 and the electric vibration table stage body 1 is on the horizontal direction.In the horizontal vibration composite testing, low pressure test chamber 15 is positioned at table top 2 left sides, and rigidity air chamber 4 is positioned at table top 2 right sides, and the direction of position, the table top 2 deviation theory centre of oscillation is for departing to the left or departing to the right.Other content is substantially the same manner as Example 1, no longer is repeated in this description here.
The foregoing description only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present utility model and enforcement according to this, can not limit protection domain of the present utility model with this.All equivalences of being done according to the utility model spirit change or modify, and all should be encompassed within the protection domain of the present utility model.
Claims (4)
1, a kind of infrabar and vibration composite testing vibration table surface center holding device is characterized in that:
Rigidity air chamber (4) in a sealing of electric vibration table stage body (1) inner space design, the centre of oscillation position of table top (2) in vertical vibration test or horizontal vibration test is by the unsteady balanced support of the low pressure test chamber that is positioned at table top (2) one ends (15) air pressure and rigidity air chamber (4) air pressure that is positioned at table top (2) other end;
Have an air pressure to be higher than the source of inflation gas of rigidity air chamber (4) internal gas pressure all the time, this source of inflation gas is connected to rigidity air chamber (4) by one road pipeline and ventilating control valve (17), forms the inflation gas circuit that a road direction rigidity air chamber (4) is inflated; There is an air pressure to be lower than the source of the gas of bleeding of rigidity air chamber (4) internal gas pressure all the time, this source of the gas of bleeding is parallel-connected to rigidity air chamber (4) by the two-way pipeline and the operation valve of bleeding, form the gas circuit of bleeding that two-way is bled to rigidity air chamber (4), wherein one the tunnel is first gas circuit of bleeding, first bleed the operation valve of bleeding in the gas circuit is first operation valve (18) of bleeding, another road is second gas circuit of bleeding, and second bleed the operation valve of bleeding in the gas circuit is second operation valve (19) of bleeding;
There is a table top center position measurement device to be used for detecting table top (2) distance and direction static and dynamically position, the deviation theory centre of oscillation, this table top center position measurement device is mainly by survey sensor (16), signal processing circuit and controller are formed, survey sensor (16) is located on the electric vibration table stage body (1) of table top (2) centre of oscillation location measurement point correspondence, the output signal of survey sensor (16) is connected with the input end of signal processing circuit, the output terminal of signal processing circuit is connected with the controller input end, the output terminal of controller respectively with ventilating control valve (17), first the bleed control end of operation valve (19) of operation valve (18) and second of bleeding is connected.
2, infrabar according to claim 1 and vibration composite testing vibration table surface center holding device is characterized in that: described second bleeds is provided with proportioning valve in the gas circuit and controls rate of air sucked in required, realizes the rate of air sucked in required control of this gas circuit.
3, infrabar according to claim 1 and vibration composite testing vibration table surface center holding device is characterized in that: described survey sensor (16) is current vortex sensor or photoelectric sensor.
4, infrabar according to claim 1 and vibration composite testing vibration table surface center holding device, it is characterized in that: be provided with a table top center indicator, the input end of this indicator is connected with the output terminal of controller, is used to indicate the distance and the direction of position, table top (2) the deviation theory centre of oscillation.
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| Application Number | Priority Date | Filing Date | Title |
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| CNU200820199288XU CN201314856Y (en) | 2008-11-20 | 2008-11-20 | Low air pressure and vibration combined test vibration table center maintaining device |
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| Application Number | Priority Date | Filing Date | Title |
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| CNU200820199288XU CN201314856Y (en) | 2008-11-20 | 2008-11-20 | Low air pressure and vibration combined test vibration table center maintaining device |
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| CN201314856Y true CN201314856Y (en) | 2009-09-23 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915651A (en) * | 2010-08-02 | 2010-12-15 | 浙江大学 | Push-type displacement feedback pneumatic deviation correction mechanism of vibrating platform used under centrifugal environment |
| CN102566613A (en) * | 2011-12-07 | 2012-07-11 | 青岛四方车辆研究所有限公司 | Air charging and discharging control device for air spring supporting system |
| CN103674458A (en) * | 2013-11-18 | 2014-03-26 | 北京宇航系统工程研究所 | Liquid nitrogen temperature zone vibration test device of low temperature pressure accumulator for carrier rocket |
| CN110907661A (en) * | 2019-12-19 | 2020-03-24 | 中国电子科技集团公司第二十六研究所 | Accelerometer dynamic performance testing device and method under low-pressure environment |
| CN111097558A (en) * | 2020-01-13 | 2020-05-05 | 苏州苏试试验集团股份有限公司 | Horizontal four-comprehensive test system |
| CN118130955A (en) * | 2024-05-06 | 2024-06-04 | 四川天旭新维工程技术股份有限公司 | Energy feedback type frequency converter test equipment |
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2008
- 2008-11-20 CN CNU200820199288XU patent/CN201314856Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915651A (en) * | 2010-08-02 | 2010-12-15 | 浙江大学 | Push-type displacement feedback pneumatic deviation correction mechanism of vibrating platform used under centrifugal environment |
| CN102566613A (en) * | 2011-12-07 | 2012-07-11 | 青岛四方车辆研究所有限公司 | Air charging and discharging control device for air spring supporting system |
| CN103674458A (en) * | 2013-11-18 | 2014-03-26 | 北京宇航系统工程研究所 | Liquid nitrogen temperature zone vibration test device of low temperature pressure accumulator for carrier rocket |
| CN110907661A (en) * | 2019-12-19 | 2020-03-24 | 中国电子科技集团公司第二十六研究所 | Accelerometer dynamic performance testing device and method under low-pressure environment |
| CN111097558A (en) * | 2020-01-13 | 2020-05-05 | 苏州苏试试验集团股份有限公司 | Horizontal four-comprehensive test system |
| CN118130955A (en) * | 2024-05-06 | 2024-06-04 | 四川天旭新维工程技术股份有限公司 | Energy feedback type frequency converter test equipment |
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