CN109142075A - A kind of deep-sea pressure-resistance structure device for testing creep resistance - Google Patents
A kind of deep-sea pressure-resistance structure device for testing creep resistance Download PDFInfo
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- CN109142075A CN109142075A CN201811141665.9A CN201811141665A CN109142075A CN 109142075 A CN109142075 A CN 109142075A CN 201811141665 A CN201811141665 A CN 201811141665A CN 109142075 A CN109142075 A CN 109142075A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0071—Creep
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of deep-sea pressure-resistance structure device for testing creep resistance, it is related to the field of test technology, in the device, deep-sea pressure-resistance structure to be tested is placed in pressure measuring cylinder ontology, pressure measuring cylinder ontology provides deep sea pressure experimental enviroment, pressure measuring cylinder ontology is placed in temperature test chamber, by temperature needed for the gas temperature in the adjustable temperature test chamber of temperature control system to test and keep constant, it not only can be with simulated deep-sea environment temperature, to which more accurate test obtains the creep properties under ocean temperature, the temperature for being also able to maintain deep-sea pressure-resistance structure to be tested is constant, to reduce influence of the cold and hot deformation to test result caused by temperature, it ensure that the measuring accuracy of long-term creep characteristic test.
Description
Technical field
The present invention relates to the field of test technology, especially a kind of deep-sea pressure-resistance structure device for testing creep resistance.
Background technique
Deep-sea pressure-resistance structure is various deep sea equipments, mechanical supporting body, especially for riding type benthoscope, by
In the safety of personnel to be guaranteed, therefore the long-term reliability of deep-sea pressure-resistance structure is required high.Traditional deep-sea pressure-resistance structure
Stiffness steel are mainly used, but are continuously increased as deep sea equipment is latent deep, titanium alloy is with its specific strength height and corrosion resistance
The characteristics such as good and the construction for being more and more applied to deep-sea pressure-resistance structure.But titanium alloy material is long-term under normal temperature high voltage
Work, can generate very important creep, the deformation of creep of metal structure is mainly shown as and can also hold under constant stress
The raw deformation of supervention may cause geometrical shapes and be unsatisfactory for application requirement, and geometrical defect amplifies, under ultimate bearing capacity
Drop, or even unstable failure occurs.Therefore it before deep-sea pressure-resistance structure comes into operation, needs through model test to titanium alloy
The creep properties of deep-sea pressure-resistance structure carry out experimental study, thus the safety evaluation side of the deep-sea pressure-resistance structure for long service
Method provides support.
According to the universal law of metal creep, deformation of creep amount and stress level are positively correlated, in the biggish allusion quotation of structural stress
Type position, the deformation of creep is also obvious, therefore leads at present when the creep properties to deep-sea pressure-resistance structure carry out experimental study
It is often to arrange foil gauge at these positions, then entire model is placed in the pressure measuring cylinder of simulated deep-sea environment, so that it may which simulation is deep
Creep at room temperature behavior of the extra large pressure-resistance structure under deep sea pressure.But during current experimental study, the pressure measuring cylinder master of use
It to be directed to the bearing capacity of short time, it is insensitive to temperature change, and pressure-resistance structure creep at room temperature test in deep-sea needs to hold
Continuous test test specimen generally reaches the several months, and environment temperature can affect greatly strain testing, seriously affects measuring accuracy.Separately
On the one hand, the creep rate Yu temperature of metal material also have direct relation, the temperature of temperature and land under deep-marine-environment
There is larger difference, also will affect the accuracy of test.
Summary of the invention
The present inventor regarding to the issue above and technical need, proposes a kind of deep-sea pressure-resistance structure creep performance test dress
It sets, influence of the environment temperature to test result can be effectively reduced when carrying out creep performance test using the device, so that creep
Performance test is more accurate.
Technical scheme is as follows:
A kind of deep-sea pressure-resistance structure device for testing creep resistance, including deep-sea pressure-resistance structure to be tested, which includes:
Pressure measuring cylinder ontology, temperature test chamber, foil gauge, pressure sensor, pressure gauge, temperature sensor, load shut-off valve, high pressure water
Pump, temperature control system and strain pressure testing system；
Deep-sea pressure-resistance structure to be tested is arranged in pressure measuring cylinder ontology, and pressure measuring cylinder ontology connects water-filled pipe, water service pipe
Road, which is disposed with, loads shut-off valve and high-pressure hydraulic pump, hydraulically full in pressure measuring cylinder ontology；Pressure measuring cylinder ontology is arranged in temperature
In chamber, temperature test chamber connects vent line, and vent line connects temperature control system, is full of gas in temperature test chamber
Body；
The position to be tested of deep-sea pressure-resistance structure to be tested is arranged in foil gauge, and the conducting wire of foil gauge leads to temperature examination
Tryoff is outer and connects strain pressure testing system；Pressure sensor is contacted with the intrinsic liquid of pressure measuring cylinder, pressure sensor
Conducting wire leads to outside temperature test chamber and connects strain pressure testing system；Pressure gauge is arranged in temperature test chamber and pressure gauge
Pressure sensor is connected, temperature test chamber offers watch window, and watch window face pressure gauge, pressure gauge is for showing pressure
The pressure value that sensor sensing arrives；Temperature sensor is arranged in pressure measuring cylinder ontology and/or in temperature test chamber, temperature sensor
Conducting wire lead to that temperature test chamber is outer and connect temperature control system, and temperature control system includes display screen, and display screen is used for
The temperature value that displays temperature sensor sensing arrives.
Its further technical solution is that pressure measuring cylinder ontology includes pressure measuring cylinder cylinder and pressure measuring cylinder end socket, pressure measuring cylinder end socket
Together with the dismountable combination sealing of pressure measuring cylinder cylinder, pressure sensor is arranged on pressure measuring cylinder end socket and probes into pressure measuring cylinder sheet
It is contacted in vivo with liquid, it is external that the conducting wire of pressure sensor is located at pressure measuring cylinder sheet；Watertight cable hole is offered on pressure measuring cylinder end socket,
The conducting wire of foil gauge and the conducting wire that the intrinsic temperature sensor of pressure measuring cylinder is arranged in lead to pressure by watertight cable hole
Cylinder is originally external；
Temperature test chamber includes humid test box body and temperature test chamber top cover, humid test box body and humid test
The dismountable combination sealing of case top cover together, offers heat-insulating and sealing aperture on temperature test chamber top cover, pressure sensor
Conducting wire, the conducting wire for the temperature sensor being arranged in temperature test chamber and the conducting wire drawn out of pressure measuring cylinder ontology pass through heat-insulated
Seal and opening is led to outside temperature test chamber.
The method have the benefit that:
(1), in pressure-resistance structure device for testing creep resistance in deep-sea disclosed in the present application, pressure measuring cylinder ontology provides deep-sea pressure
Power experimental enviroment, the gas temperature in temperature test chamber can need to adjust according to test, to realize deep-marine-environment temperature
Simulation can directly test the croop property under ocean temperature, survey by the way that temperature test chamber is arranged in pressure measuring cylinder body exterior
Test result is more accurate.
(2), it is constant can also effectively to control the intrinsic temperature of pressure measuring cylinder for the setting of temperature test chamber, on the one hand can protect
The constant of the temperature of deep-sea pressure-resistance structure to be tested is held, on the other hand also ensures that the temperature of pressure liquid within the cartridge is constant, keeps away
Exempt from temperature change and cause stress the variation of cylinder pressure, to eliminate cold and hot deformation caused by temperature to creep test result
Influence, reduce the variation of the pressure and temperature of deep-sea pressure-resistance structure to be tested in long-term test process, reduce test result by
The data fluctuations that temperature influences achieve the purpose that precise measurement, guarantee the measuring accuracy during long-term creep characteristic test, and
Engineering reliability is high, convenient for installation and maintenance.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of pressure-resistance structure device for testing creep resistance in deep-sea disclosed in the present application.
Specific embodiment
The following further describes the specific embodiments of the present invention with reference to the drawings.
Referring to FIG. 1, the device is for treating this application discloses a kind of deep-sea pressure-resistance structure device for testing creep resistance
The deep-sea pressure-resistance structure M of test carries out creep performance test, which includes pressure measuring cylinder ontology and temperature test chamber, pressure measuring cylinder sheet
Body is made of pressure-resistant material, and temperature test chamber is made of heat-barrier material, and pressure measuring cylinder ontology is arranged in temperature test chamber.This
Pressure measuring cylinder ontology and temperature test chamber in application are all made of split type structure, and pressure measuring cylinder ontology includes pressure measuring cylinder cylinder 11 and pressure
Power cylinder end socket 12；Temperature test chamber includes humid test box body 21 and temperature test chamber top cover 22, pressure measuring cylinder end socket 12 and temperature
Degree chamber top cover 22 can lift by crane separation.It, can be with after pressure measuring cylinder end socket 12 and the lifting separation of temperature test chamber top cover 22
Deep-sea pressure-resistance structure M to be tested is arranged in pressure measuring cylinder ontology, after being provided with, then by pressure measuring cylinder end socket 12 and pressure measuring cylinder
11 combination sealing of cylinder is together, by temperature test chamber top cover 22 together with 21 combination sealing of humid test box body.Meanwhile
In order to facilitate the extraction of the conducting wire of the electronic device in pressure measuring cylinder ontology and temperature test chamber, watertight is offered on pressure measuring cylinder ontology
Cable hole 13, watertight cable hole 13 are usually to be provided on pressure measuring cylinder end socket 12；Heat-insulating and sealing is offered on temperature test chamber to open
Hole 23, heat-insulating and sealing aperture 23 are usually to be provided on temperature test chamber top cover 22.
The device further include foil gauge 31, pressure sensor 32, pressure gauge 33, temperature sensor 34, load shut-off valve 35,
The mating auxiliaries such as high-pressure hydraulic pump 36, temperature control system 40 and strain pressure testing system 50, specific:
Pressure measuring cylinder ontology connects water-filled pipe, and load shut-off valve 35 and high-pressure hydraulic pump 36 are disposed on water-filled pipe,
It is hydraulically full in pressure measuring cylinder ontology, it is usually full of water, high-pressure hydraulic pump 36 and load 35 cooperating of shut-off valve, for adjusting pressure
Pressure loading in power cylinder ontology.
The position to be tested of deep-sea pressure-resistance structure M to be tested is arranged in foil gauge 31, and the conducting wire of foil gauge 31 passes through water
It is external that close cable hole 13 leads to pressure measuring cylinder sheet, then is led to outside temperature test chamber by heat-insulating and sealing aperture 23, and connect and answer
Transformation force test system 50.
Pressure sensor 32 is contacted with the intrinsic liquid of pressure measuring cylinder, usually all setting methods are as follows: by pressure sensor 32
It is arranged on pressure measuring cylinder end socket 12 and probes into pressure measuring cylinder ontology and is contacted with liquid, in this setup, pressure sensor
32 conducting wire is located in temperature test chamber, pressure measuring cylinder sheet is external, and the conducting wire of pressure sensor 32 is drawn by heat-insulating and sealing aperture 23
Out to outside temperature test chamber, and connect strain pressure testing system 50.Pressure gauge 33, pressure are also connected on pressure sensor 32
Table 33 is located in temperature test chamber, and pressure gauge 33 is for showing the pressure data that pressure sensor 32 senses.It is corresponding, temperature
Chamber offers watch window 24, can be provided on humid test box body 21, can also be provided with temperature test chamber top
On lid 22, if Fig. 1 is for opening up watch window 24 on temperature test chamber top cover 22,24 face pressure gauge 33 of watch window is used
Family can use the registration that watch window 24 observes pressure gauge 33.
Strain the strain testing data that pressure testing system 50 acquires foil gauge 31, and the pressure of acquisition pressure sensor 32
Force data, so that it may strain-pressure versus time data are obtained according to strain testing data and pressure data, to strain test data
The creep strain situation of position to be tested can be obtained by carrying out Mathematical treatment.Straining pressure testing system 50 is existing creep
Common Component during performance test, for carrying out Mathematical treatment to test data, those skilled in the art can be with reference to normal
The croop property test of rule determines the specific structure and working principle of strain pressure testing system 50.
Gassy in temperature test chamber, temperature sensor 34 are arranged in pressure measuring cylinder ontology and/or in temperature test chamber,
The schematic diagram of temperature sensor 34 is respectively provided in pressure measuring cylinder ontology and in temperature test chamber as shown in figure 1.It is arranged in pressure measuring cylinder
To lead to pressure measuring cylinder sheet external by watertight cable hole 13 for the conducting wire of intrinsic temperature sensor 34, then is opened by heat-insulating and sealing
Hole 23 is led to outside temperature test chamber, and connects temperature control system 40.Temperature sensor 34 in temperature test chamber is set
Conducting wire led to outside temperature test chamber by heat-insulating and sealing aperture 23, and connect temperature control system 40.Temperature control system
40 include display screen, and temperature control system 40 receives the temperature value of temperature sensor 34, and the temperature value is shown in display screen,
When being respectively provided with temperature sensor in pressure measuring cylinder ontology and in temperature test chamber, the temperature value of the two temperature sensors is aobvious
Show screen display.It should be noted that when being respectively provided with temperature sensor in temperature test chamber and pressure measuring cylinder ontology, originally this two
There may be differences for the temperature value of a temperature sensor, but the gas of this inside and outside of pressure measuring cylinder carry out sufficient heat exchange it
Afterwards, the temperature value of two temperature sensors can be identical, therefore a temperature sensor actually can only be arranged.
Temperature test chamber connects temperature control system 40 by vent line, and temperature control system 40 is for controlling temperature examination
Gas temperature in tryoff.Temperature control system 40 is current existing common system, it will usually including temperature controller, heating
The structures such as system and refrigeration system can use heating system by the control of temperature controller and carry out heating or utilizing refrigeration
System is freezed, so that the gas temperature controlled in temperature test chamber is maintained at temperature constant state.Those skilled in the art can be with
With reference to the circuit structure and working principle of common temperature control system 40, the application is not described in detail.
Pressure-resistance structure device for testing creep resistance in deep-sea disclosed in the present application is to pressure-resistance structure M progress in deep-sea to be tested
Process when creep performance test is as follows:
One, the preparation stage is tested:
1, by pressure measuring cylinder end socket 12 and the lifting separation of temperature test chamber top cover 22, then by deep-sea pressure-resistance structure to be tested
M is arranged in pressure measuring cylinder ontology, foil gauge 31 is arranged in the position to be tested of deep-sea pressure-resistance structure M to be tested, by temperature
Sensor 34 is arranged in pressure measuring cylinder ontology.
2, by pressure measuring cylinder end socket 12 together with 11 combination sealing of pressure measuring cylinder cylinder, the conducting wire of foil gauge 31 has been set
The conducting wire of temperature sensor 34 in pressure measuring cylinder ontology is drawn from pressure measuring cylinder ontology by watertight cable hole 13.
3, pressure sensor 32 is installed on pressure measuring cylinder end socket 12, pressure sensor 32 probes into pressure measuring cylinder ontology.Pressure
Pressure gauge 33,33 face watch window 24 of pressure gauge are installed on sensor 32.Temperature sensor 34 is set in temperature test chamber.
4, by temperature test chamber top cover 22 together with 21 combination sealing of humid test box body, pressure sensor 32 is led
The conducting wire for the temperature sensor 34 being arranged in line, temperature test chamber and the conducting wire drawn from pressure measuring cylinder ontology pass through heat-insulated
Seal and opening 23 is drawn from temperature test chamber, and is separately connected temperature control system 40 and strain pressure testing system 50.
Two, experimental stage:
1, load shut-off valve 35 is opened, liquid is injected into pressure measuring cylinder ontology by water-filled pipe using high-pressure hydraulic pump 36,
While the intrinsic pressure data of pressure measuring cylinder of the display of pressure gauge 33 is observed, until closing and adding when the reading of pressure gauge 33 is greater than 0
Carry shut-off valve 35.
2, the temperature value in the temperature test chamber that the display screen of observation temperature control system 40 is shown, passes through temperature and controls system
System 40 adjusts the temperature of the gas in temperature test chamber until temperature value is preset test temperature.Static a period of time guarantees
The sufficient heat exchange of gas.
3, load shut-off valve 35 is opened, is continued according to the load process pre-established using high-pressure hydraulic pump 36 to pressure measuring cylinder
It pressurizes in ontology, until the pressure data that pressure gauge 33 is shown reaches the required pressure of test, closes load shut-off valve 35.
4, the strain testing data of foil gauge 31, and acquisition pressure sensor are acquired using strain pressure testing system 50
The time interval of 32 pressure data, acquisition customized can be arranged.Occur failing as deep-sea pressure-resistance structure M to be tested or
After test has reached scheduled test period, load shut-off valve 35 is opened, the intrinsic pressure 0 of pressure measuring cylinder is made, completes pressure
Test.Strain pressure testing system 50 can obtain pressure resistance knot in deep-sea to be tested according to strain testing data and pressure data
In the entire strain-pressure versus time data kept during load, carrying out Mathematical treatment to strain test data can obtain structure M
To the creep strain situation of position to be tested.
Above-described is only the preferred embodiment of the application, and present invention is not limited to the above embodiments.It is appreciated that this
The other improvements and change that field technical staff directly exports or associates without departing from the spirit and concept in the present invention
Change, is considered as being included within protection scope of the present invention.
Claims (2)
1. a kind of deep-sea pressure-resistance structure device for testing creep resistance, including deep-sea pressure-resistance structure to be tested, which is characterized in that institute
Stating device includes: pressure measuring cylinder ontology, temperature test chamber, foil gauge, pressure sensor, pressure gauge, temperature sensor, load cut-off
Valve, high-pressure hydraulic pump, temperature control system and strain pressure testing system；
The deep-sea pressure-resistance structure to be tested is arranged in the pressure measuring cylinder ontology, and the pressure measuring cylinder ontology connects water service pipe
Road, is disposed with the load shut-off valve and high-pressure hydraulic pump on the water-filled pipe, hydraulically full in the pressure measuring cylinder ontology；
The pressure measuring cylinder ontology is arranged in the temperature test chamber, and the temperature test chamber connects vent line, the vent line
Connect the temperature control system, gassy in the temperature test chamber；
The position to be tested of the deep-sea pressure-resistance structure to be tested is arranged in the foil gauge, and the conducting wire of the foil gauge is drawn
Outside to the temperature test chamber and connect the strain pressure testing system；In the pressure sensor and the pressure measuring cylinder ontology
Liquid contact, it is outer and connect the strain pressure test system that the conducting wire of the pressure sensor leads to the temperature test chamber
System；The pressure gauge is arranged in the temperature test chamber and the pressure gauge connects the pressure sensor, the temperature examination
Tryoff offers watch window, and pressure gauge described in the watch window face, the pressure gauge is for showing the pressure sensing
The pressure value that device senses；The temperature sensor setting is in the pressure measuring cylinder ontology and/or in the temperature test chamber, institute
The conducting wire for stating temperature sensor leads to outside the temperature test chamber and connects the temperature control system, temperature control system
System includes display screen, and the display screen is for showing the temperature value that the temperature sensor senses arrive.
2. the apparatus according to claim 1, which is characterized in that
The pressure measuring cylinder ontology includes pressure measuring cylinder cylinder and pressure measuring cylinder end socket, and the pressure measuring cylinder end socket and the pressure measuring cylinder cylinder can
Together, the pressure sensor is arranged on the pressure measuring cylinder end socket and probes into the pressure measuring cylinder ontology combination sealing of disassembly
Interior to contact with liquid, it is external that the conducting wire of the pressure sensor is located at the pressure measuring cylinder sheet；It is offered on the pressure measuring cylinder end socket
Watertight cable hole, the conducting wire of the foil gauge and the conducting wire that the intrinsic temperature sensor of the pressure measuring cylinder is arranged in pass through institute
Stating watertight cable hole, to lead to the pressure measuring cylinder sheet external；
The temperature test chamber includes humid test box body and temperature test chamber top cover, the humid test box body with it is described
The dismountable combination sealing of temperature test chamber top cover together, offers heat-insulating and sealing aperture on the temperature test chamber top cover,
The conducting wire of the pressure sensor, the conducting wire for the temperature sensor being arranged in the temperature test chamber and from the pressure measuring cylinder
The conducting wire drawn in ontology is led to outside the temperature test chamber by the heat-insulating and sealing aperture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811141665.9A CN109142075A (en) | 2018-09-28 | 2018-09-28 | A kind of deep-sea pressure-resistance structure device for testing creep resistance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811141665.9A CN109142075A (en) | 2018-09-28 | 2018-09-28 | A kind of deep-sea pressure-resistance structure device for testing creep resistance |
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| CN201811141665.9A Pending CN109142075A (en) | 2018-09-28 | 2018-09-28 | A kind of deep-sea pressure-resistance structure device for testing creep resistance |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110243695A (en) * | 2019-07-12 | 2019-09-17 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | It is a kind of for providing the pilot system of structure deformation of creep environment |
| CN111458097A (en) * | 2020-04-27 | 2020-07-28 | 中国船舶科学研究中心 | Underwater structure collision test device |
| CN111583769A (en) * | 2020-03-26 | 2020-08-25 | 广东工业大学 | Deep sea environment simulation temperature control system and use method thereof |
| CN111721642A (en) * | 2020-06-22 | 2020-09-29 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Temperature acceleration test system |
| WO2020192040A1 (en) * | 2019-03-22 | 2020-10-01 | 江苏大学 | Fracture toughness testing device under low-temperature and high-pressure hydrogen charged environment and method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020192040A1 (en) * | 2019-03-22 | 2020-10-01 | 江苏大学 | Fracture toughness testing device under low-temperature and high-pressure hydrogen charged environment and method thereof |
| CN110243695A (en) * | 2019-07-12 | 2019-09-17 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | It is a kind of for providing the pilot system of structure deformation of creep environment |
| CN111583769A (en) * | 2020-03-26 | 2020-08-25 | 广东工业大学 | Deep sea environment simulation temperature control system and use method thereof |
| CN111458097A (en) * | 2020-04-27 | 2020-07-28 | 中国船舶科学研究中心 | Underwater structure collision test device |
| CN111458097B (en) * | 2020-04-27 | 2021-09-07 | 中国船舶科学研究中心 | Underwater structure collision test device |
| CN111721642A (en) * | 2020-06-22 | 2020-09-29 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Temperature acceleration test system |
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Application publication date: 20190104 |