CN108151962A - A kind of method and its testing machine of positive-pressure type simulation vacuum test - Google Patents
A kind of method and its testing machine of positive-pressure type simulation vacuum test Download PDFInfo
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- CN108151962A CN108151962A CN201711351322.0A CN201711351322A CN108151962A CN 108151962 A CN108151962 A CN 108151962A CN 201711351322 A CN201711351322 A CN 201711351322A CN 108151962 A CN108151962 A CN 108151962A
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- pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
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- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses the methods and its testing machine of a kind of positive-pressure type simulation vacuum test, and this method comprises the following steps：Step 1 starts pressure source, is opened by PLC control valves, and pressure source supplies pressure difference sensor positive pressure by pipeline makes the presser sensor chip of pressure difference sensor generate the warpage towards atmospheric pressure；Step 2, closing valve makes presser sensor chip return；Step 3 intends vacuum pressure life test by the continuous die opening and closing of PLC control valves.The present invention solves the difficulty that the life experiment of vacuum pressure sensor can not be run under the conditions of high frequency long-time.By the valve constantly opening and closing and the adjusting of pressure source pressure size of PLC controls, which can realize simulation different frequency difference vacuum values and the various vacuum pressure life tests of different cycle-index requirements.
Description
Technical field
The invention belongs to life test machine technical fields, and in particular to a kind of method of positive-pressure type simulation vacuum test and its
Testing machine.
Background technology
Vacuum degree pressure sensor is the important branch in sensor application, however is limited to the continuous of vacuum pump for a long time
Boat power and bear the ability frequently switched on, there is no the simulation practical vacuum applications of good method to carry out life test.
Traditional life test or mixed by a constant-pressure source pressure valve that can be frequently switched on or
It is that required high-frequency pressure waveform is realized by the way that the pressure source of high-frequency impulse pressure wave can be generated.However both methods
It is not suitable for vacuum application, because the vacuum pump as vacuum source can not bear prolonged frequent start-stop, and due to taking out
The time that vacuum needs is significantly larger than the time that compressed air establishes positive pressure, and this method, which also is difficult to reach pressure wave change frequency, to exist
The requirement of more than 1Hz.
Invention content
The present invention is directed at least solve one of technical problem in the prior art.For this purpose, the present invention is providing one kind just
Pressure type simulates the method and its testing machine of vacuum test, it is therefore an objective to simulate the life test of vacuum pressure sensor.
To achieve these goals, the technical solution taken of the present invention is：
A kind of method of positive-pressure type simulation vacuum test, includes the following steps：
Step 1 starts pressure source, is opened by PLC control valves, pressure source supplies pressure difference sensor by pipeline
Positive pressure makes the presser sensor chip of pressure difference sensor generate the warpage towards atmospheric pressure；
Step 2, closing valve makes presser sensor chip return；
Step 3 intends vacuum pressure life test by the continuous die opening and closing of PLC control valves.
The opening and closing twice of the PLC control valves forms a pressures cycle.
The method further includes the life test for by the size of regulated pressure source pressure value simulate different vacuum values.
The pressure source is high-pressure air source or compression pump.
A kind of positive-pressure type simulates vacuum testing machine, and including gas transmission mechanism and PLC, the testing machine further includes differential sensing
Device and valve, the PLC are electrically connected with valve, and the gas transmission mechanism supplies pressure difference sensor forward direction pressure by the opening and closing of valve
Power.
The gas transmission mechanism includes pressure source and air delivering pipeline, and the valve is set on air delivering pipeline.
Beneficial effects of the present invention：
What the 1st, the life experiment of the invention for solving vacuum pressure sensor can not be run under the conditions of high frequency long-time is tired
It is difficult.
2nd, the realization method economy of the testing machine can be transformed from any positive pressure pressure circulator.
3rd, the testing machine can realize the vacuum experiment condition of wide width.
4th, by controlling positive pressure that can realize the controllable precise of simulation vacuum pressure numerical value.
Description of the drawings
This specification includes the following drawings, and shown content is respectively：
Fig. 1 is the testing machine structure block diagram of the present invention；
Fig. 2 is the experimental principle figure of vacuum application environment and simulated experimental environments.
Specific embodiment
Below against attached drawing, by the description of the embodiment, making to the specific embodiment of the present invention further details of
Explanation, it is therefore an objective to those skilled in the art be helped to have more complete, accurate and deep reason to design of the invention, technical solution
Solution, and contribute to its implementation.
As shown in Figure 1 to Figure 2, a kind of positive-pressure type simulation vacuum testing machine, including gas transmission mechanism and PLC, the testing machine is also
Including pressure difference sensor and valve, PLC is electrically connected with valve, and gas transmission mechanism supplies pressure difference sensor by the opening and closing of valve
Positive pressure.Gas transmission mechanism includes pressure source and air delivering pipeline, and the valve is set on air delivering pipeline.Pressure source provides long-term steady
Fixed positive pressure, according to vacuum pressure wave period control valve is opened and closed PLC.
Life test is carried out for the ease of simulation practical vacuum, proposes a kind of method of positive-pressure type simulation vacuum test, packet
Include following steps：
Step 1 starts pressure source, is opened by PLC control valves, pressure source supplies pressure difference sensor by pipeline
Positive pressure makes the presser sensor chip of pressure difference sensor generate the warpage towards atmospheric pressure (ATM)；
Step 2, closing valve makes presser sensor chip return；
Step 3 intends vacuum pressure life test by the continuous die opening and closing of PLC control valves.
For the ease of simulating the vacuum pressure life test of different cycle-index requirements, the two of PLC control valves can be made
Secondary opening and closing forms a pressures cycle.
According to the characteristics of pressure difference class vacuum transducer product, it is changed to make pressure using the mode that positive pressure source is reversely pressurizeed
Sensing element is in simulation vacuum work state.Positive pressure source can realize high-frequency and prolonged by traditional method
Switch, so simulate required high frequency (>1Hz) and for a long time (>100000 times) vacuum pressure waveform.When valve is beaten
When opening, positive pressure reversely supplies pressure difference sensor, generates the presser sensor chip of product and is equal under vacuum environment
Deformation, and when the valve is closed, pressure disappears, presser sensor chip return.The opening and closing twice of valve forms a pressures cycle,
Simulation different frequencies can be realized by the valve constantly opening and closing and the adjusting of pressure source pressure size, the testing machine of PLC controls
Rate difference vacuum values and the various vacuum pressure life tests of different cycle-index requirements.By controlling positive pressure real
Now simulate the controllable precise of vacuum pressure numerical value.Coordinate the temperature/humidity cabinet on periphery etc. attachment, can further realize with warm and humid
The simulation vacuum pressure life test of cycle is spent, meets the needs of user.
The present invention is exemplarily described above in association with attached drawing.Obviously, present invention specific implementation is not by above-mentioned side
The limitation of formula.As long as employ the improvement of the various unsubstantialities of inventive concept and technical scheme of the present invention progress；Or not
It is improved, the above-mentioned design of the present invention and technical solution are directly applied into other occasions, in protection scope of the present invention
Within.
Claims (6)
- A kind of 1. method of positive-pressure type simulation vacuum test, which is characterized in that include the following steps：Step 1 starts pressure source, is opened by PLC control valves, and pressure source supplies pressure difference sensor forward direction by pipeline Pressure makes the presser sensor chip of pressure difference sensor generate the warpage towards atmospheric pressure；Step 2, closing valve makes presser sensor chip return；Step 3 intends vacuum pressure life test by the continuous die opening and closing of PLC control valves.
- 2. the method for positive-pressure type simulation vacuum test according to claim 1, which is characterized in that the PLC control valves Opening and closing forms a pressures cycle twice.
- 3. the method for positive-pressure type simulation vacuum test according to claim 1, which is characterized in that the method, which further includes, to be passed through The size of regulated pressure source pressure value simulate the life test of different vacuum values.
- 4. the method for positive-pressure type simulation vacuum test according to claim 1, which is characterized in that the pressure source is high pressure gas Source or compression pump.
- 5. a kind of positive-pressure type simulates vacuum testing machine, including gas transmission mechanism and PLC, which is characterized in that the testing machine further includes Pressure difference sensor and valve, the PLC are electrically connected with valve, and the gas transmission mechanism supplies differential biography by the opening and closing of valve Sensor positive pressure.
- 6. positive-pressure type simulation vacuum testing machine according to claim 5, which is characterized in that the gas transmission mechanism includes pressure source And air delivering pipeline, the valve are set on air delivering pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711351322.0A CN108151962A (en) | 2017-12-15 | 2017-12-15 | A kind of method and its testing machine of positive-pressure type simulation vacuum test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711351322.0A CN108151962A (en) | 2017-12-15 | 2017-12-15 | A kind of method and its testing machine of positive-pressure type simulation vacuum test |
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| CN108151962A true CN108151962A (en) | 2018-06-12 |
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| CN201711351322.0A Pending CN108151962A (en) | 2017-12-15 | 2017-12-15 | A kind of method and its testing machine of positive-pressure type simulation vacuum test |
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Citations (13)
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| US3508431A (en) * | 1968-09-05 | 1970-04-28 | Us Interior | System for calibration of a differential pressure transducer |
| CN101706347A (en) * | 2009-09-25 | 2010-05-12 | 徐工集团工程机械有限公司 | Method for realizing high and low pressure sensor test in low pressure environment |
| CN102445303A (en) * | 2011-11-28 | 2012-05-09 | 武汉理工大学 | Experiment table for mass calibration of oil pressure sensor |
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| CN203037408U (en) * | 2012-12-04 | 2013-07-03 | 武汉和越装备技术有限公司 | Pressure sensor durability test bench |
| CN103499414A (en) * | 2013-10-16 | 2014-01-08 | 北京航空航天大学 | Dynamic calibration device for small-size pressure sensor |
| CN204142417U (en) * | 2014-08-13 | 2015-02-04 | 江汉大学 | A kind of car force sensor endurance testing device |
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| CN105651458A (en) * | 2016-04-07 | 2016-06-08 | 中国科学院光电研究院 | Device and method for calibrating differential pressure sensor in low-pressure environment with high or low temperature |
| CN106092440A (en) * | 2016-08-09 | 2016-11-09 | 江苏方天电力技术有限公司 | A kind of detection device for differential pressure transmitter |
| CN206609562U (en) * | 2017-03-30 | 2017-11-03 | 中广核核电运营有限公司 | A kind of used in nuclear power station differential pressure and pressure transmitter reliability detecting device |
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2017
- 2017-12-15 CN CN201711351322.0A patent/CN108151962A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3508431A (en) * | 1968-09-05 | 1970-04-28 | Us Interior | System for calibration of a differential pressure transducer |
| CN101706347A (en) * | 2009-09-25 | 2010-05-12 | 徐工集团工程机械有限公司 | Method for realizing high and low pressure sensor test in low pressure environment |
| CN103048085A (en) * | 2011-10-13 | 2013-04-17 | 江苏恩泰传感器有限公司 | Temperature compensation system of pressure sensor and temperature compensation method thereof |
| CN102445303A (en) * | 2011-11-28 | 2012-05-09 | 武汉理工大学 | Experiment table for mass calibration of oil pressure sensor |
| CN203037408U (en) * | 2012-12-04 | 2013-07-03 | 武汉和越装备技术有限公司 | Pressure sensor durability test bench |
| CN104422563A (en) * | 2013-09-10 | 2015-03-18 | 珠海格力电器股份有限公司 | Life test device |
| CN103499414A (en) * | 2013-10-16 | 2014-01-08 | 北京航空航天大学 | Dynamic calibration device for small-size pressure sensor |
| CN204142417U (en) * | 2014-08-13 | 2015-02-04 | 江汉大学 | A kind of car force sensor endurance testing device |
| CN104535260A (en) * | 2014-12-15 | 2015-04-22 | 重庆布莱迪仪器仪表有限公司 | Dynamic pressure fatigue testing device for pressure gage |
| CN204422139U (en) * | 2015-02-09 | 2015-06-24 | 徐桂林 | Fatigue tester for pressure instruments |
| CN105651458A (en) * | 2016-04-07 | 2016-06-08 | 中国科学院光电研究院 | Device and method for calibrating differential pressure sensor in low-pressure environment with high or low temperature |
| CN106092440A (en) * | 2016-08-09 | 2016-11-09 | 江苏方天电力技术有限公司 | A kind of detection device for differential pressure transmitter |
| CN206609562U (en) * | 2017-03-30 | 2017-11-03 | 中广核核电运营有限公司 | A kind of used in nuclear power station differential pressure and pressure transmitter reliability detecting device |
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Application publication date: 20180612 |
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| RJ01 | Rejection of invention patent application after publication |