CN106768626B - A kind of gas Step Pressure signal generator - Google Patents
A kind of gas Step Pressure signal generator Download PDFInfo
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- CN106768626B CN106768626B CN201611098258.5A CN201611098258A CN106768626B CN 106768626 B CN106768626 B CN 106768626B CN 201611098258 A CN201611098258 A CN 201611098258A CN 106768626 B CN106768626 B CN 106768626B
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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
- G01L27/002—Calibrating, i.e. establishing true relation between transducer output value and value to be measured, zeroing, linearising or span error determination
- G01L27/005—Apparatus for calibrating pressure sensors
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Abstract
The present invention relates to a kind of gas Step Pressure signal generator, in particular to a kind of fast-changing positive and negative Step Pressure driving source of pressure belongs to experimental technique field.Core of the invention is to drive the rotation of partial gear using external force, partial gear is by driving the rack gear compressed spring on mass block, spring is by generating a powerful reaction force after compression, after partial gear is separated with rack gear, mass block is quickly popped up and opens the valve body between large and small pressure chamber by hitting by the reaction force of spring, generates a fast-changing Step Pressure.What large and small cavity pressure size can be convenient is adjusted.Pressure driving source of the invention has very high durability and reliability, is very suitable for the calibration and simulation test of low middle pressure and negative pressure dynamic pressure.
Description
Technical field
The present invention relates to a kind of gas Step Pressure signal generator, in particular to a kind of pressure is fast-changing positive and negative
Step Pressure driving source, belongs to experimental technique field.
Background technique
With the continuous development of science and technology, the field for carrying out dynamic test is needed to be continuously increased, at present step class pressure
Generator is most widely used one of pressure generator, and step class pressure generator can make sensor exciting in an experiment,
To obtain the Frequency Response of sensor.Shock wave pipe device is the current relatively common step class dynamic pressure generator used,
But shock tube other than involving great expense there is also a shortcoming can not be obtained since shock tube plateau time is short
Obtain the Frequency Response of sensor low-frequency range.For most dynamic pressure measurements, the low frequency component of signal accounts for signal energy
The overwhelming majority.Therefore, the low frequency characteristic that cannot get sensor is a serious defect.
Summary of the invention
The object of the present invention is to provide a kind of gas Step Pressure signal generator, which is capable of providing quick variation
Positive and negative Step Pressure driving source, generate mesolow and negative pressure amplitude Step Pressure variation.The present invention and shock tube phase
Than Step Pressure plateau time is longer, can preferably examine and determine the low frequency characteristic of sensor；And the pressure that the present invention uses is situated between
Matter is gas, effectively avoids liquid medium leakage, long-time goes bad and needs to be provided separately the inconveniences such as hydraulic power source
Place.
The purpose of the present invention is what is be achieved through the following technical solutions.
A kind of gas Step Pressure signal generator, comprising: small chamber, big chamber, the first spring, support rod, every pressing plate, second
Spring, partial gear, mass block, shock plate, big cavity pressure inlet and outlet, small cavity pressure inlet and outlet；
Connection relationship: generator is convex shape structure, and top is small chamber, and lower part is big chamber；Generator center position peace
Equipped with support rod；Sleeve is installed on the part support rod in big chamber, sleeve upper end is fixedly connected with every pressing plate, and sleeve is worn
Mass block posterior end is crossed to be fixedly connected with shock plate；The shock plate is kept at a distance with big chamber lower surface；It is described every clamp surface
Product is greater than the area of small chamber and big chamber junction, to separate small chamber and big chamber；The fixed company of first spring and small chamber top
It connects, is fixedly connected after support rod with every pressing plate；Second spring is wound on sleeve, and company is fixed with every pressing plate in one end of second spring
It connects, the other end is fixedly connected with mass block；Mass block side is provided with rack gear, and is engaged by the rack gear with partial gear；
Small cavity pressure inlet and outlet are provided on small chamber；Big cavity pressure inlet and outlet are provided on big chamber；
When carrying out positive step pressure testing, the gas in generator is emptied first, is then filled with and sets in big chamber
The gas of pressure closes big cavity pressure inlet and outlet, it is ensured that device is in after closed environment, by rotating clockwise incomplete tooth
Wheel drives mass block to move up, squeezes second spring, when partial gear is rotated to the direction of not tooth, second
Spring generates powerful reaction force to mass block, makes on mass block fast ram to shock plate, due to shock plate and every pressing plate
Between be rigid connection, therefore shock in a flash, shock plate moves down simultaneously with every pressing plate, greatly intracavitary gas rapidly into
Enter in small chamber, generates a fast-changing positive step pressure.
When carrying out the test of negative Step Pressure, the gas in generator is emptied first, is then filled with and sets in small chamber
The gas of pressure closes small cavity pressure inlet and outlet；When needing to do negative pressure negative step test, the pressure in big chamber is evacuated to negative
Pressure；When needing to do normal pressure negative step test, the pressure in big chamber is emptied；Ensure that device is in after closed environment, passes through
Rotate clockwise partial gear, drive mass block to move up, second spring is squeezed, when partial gear rotate to
There is no the direction of tooth, second spring generates powerful reaction force to mass block, makes on mass block fast ram to shock plate, by
In shock plate and be rigid connection between pressing plate, thus shock in a flash, shock plate moves down simultaneously with every pressing plate, small
Intracavitary pressure quickly enters in big chamber, generates a fast-changing negative Step Pressure.
Beneficial effect
1, the present apparatus generates a quick positive and negative Step Pressure, and pressure magnitude is adjustable, and the apparatus platform time is than swashing
The plateau time of the wave duct device orders of magnitude several greatly, as long as device is air tight, theoretically plateau time can achieve endless；And
And it is easy to operate simple, it is pollution-free, do not damage sensor, there is very high durability and reliability, be very suitable in it is low
The calibration and simulation test of pressure and negative pressure dynamic pressure.
2, the compressed air that the medium of the present apparatus uses, storage, convenient transportation, the air after finishing test can be directly discharged into
Among atmosphere, no pollution to the environment, processing is conveniently；Gone bad, using medium to pipeline for a long time using air without worry
The problems such as corrosivity and supplement replacement；And pneumatic reaction is fast, is swift in motion, and maintenance is simple, and pipeline is not easy to block.
3, present apparatus compact structure, it is easy to operate, the capital construction auxiliary equipment such as mounting foundation is not needed, experiment operator can
With random mobile device, changes place to use and the environment of device, in vitro calibrating and measuring may be implemented, it can also band
On-the-spot test is carried out to field, laboratory school can not be taken to by solving some utensils for being difficult to dismantle or can only carry out field calibration
Quasi- problem.
Detailed description of the invention
Fig. 1 is apparatus of the present invention schematic illustration.
Wherein, 1-small chamber, 2-big chambers, the 3-the first spring, 4-support rods, 5-are every pressing plate, 6-second springs, 7-
Partial gear, 8-mass blocks, 9-shock plates, 10-big cavity pressure inlet and outlet, 11-small cavity pressure inlet and outlet.
Specific embodiment
The invention will be further described with embodiment with reference to the accompanying drawing.
Embodiment 1
A kind of gas Step Pressure signal generator, as shown in Figure 1, comprising: small chamber 1, big chamber 2, the first spring 3, support
Bar 4, every pressing plate 5, second spring 6, partial gear 7, mass block 8, shock plate 9, big cavity pressure inlet and outlet 10, small cavity pressure into
Outlet 11；
Connection relationship: generator is convex shape structure, and top is small chamber 1, and lower part is big chamber 2；Generator center position
Support rod 4 is installed；Sleeve is installed on the part support rod 4 in big chamber 2, sleeve upper end is fixedly connected with every pressing plate 5,
Sleeve passes through 8 posterior end of mass block and is fixedly connected with shock plate 9；The shock plate 9 is kept at a distance with big 2 lower surface of chamber；It is described
It is greater than the area of small chamber 1 and big 2 junction of chamber every 5 surface area of pressing plate, to separate small chamber 1 and big chamber 2；First spring 3
It is fixedly connected with small 1 top of chamber, is fixedly connected after support rod 4 with every pressing plate 5；Second spring 6 is wound on sleeve, second spring
6 one end is fixedly connected with every pressing plate 5, and the other end is fixedly connected with mass block 8；8 side of mass block is provided with rack gear, and passes through
The rack gear is engaged with partial gear 7；Small cavity pressure inlet and outlet 11 are provided on small chamber 1；Be provided on big chamber 2 big cavity pressure into
Outlet 10；The pressure sensor that range is 2MPa is installed on small chamber 1.
When carrying out positive step pressure testing, the vent valve being first turned in large and small chamber empties the gas in generator,
Then be filled with the gas for setting 1MPa pressure in big chamber 2, close big cavity pressure inlet and outlet 10, it is ensured that device be in closed environment it
Afterwards, it by rotating clockwise partial gear 7, drives mass block 8 to move up, second spring 6 is squeezed, when incomplete
Gear 7 is rotated to the direction of not tooth, and second spring 6 generates powerful reaction force to mass block 8, hits mass block 8 quickly
Hit on shock plate 9, be due to shock plate 9 and between pressing plate 5 rigid connection, therefore shock in a flash, shock plate 9 with every
Pressing plate 5 moves down simultaneously, and the gas in big chamber 2 quickly enters in small chamber 1, generates a fast-changing 1MPa positive step pressure
Power.It can analyze to obtain rise time, overshoot, settling time and the resonance of pressure sensor by the output of pressure sensor
The characteristic indexs such as frequency.
When carrying out the test of negative Step Pressure, the gas in generator is emptied first, is then filled with and sets in small chamber 1
1MPa pressure gas, close small cavity pressure inlet and outlet 11；When needing to do negative pressure negative step test, by the pressure in big chamber 2
Power is evacuated to negative pressure；When needing to do normal pressure negative step test, the pressure in big chamber 2 is emptied；Ensure that device is in closed environment
Later, it by rotating clockwise partial gear 7, drives mass block 8 to move up, second spring 6 is squeezed, when endless
All gear 7 is rotated to the direction of not tooth, and second spring 6 generates powerful reaction force to mass block 8, keeps mass block 8 quick
Strike on shock plate 9, be due to shock plate 9 and between pressing plate 5 rigid connection, therefore shock in a flash, shock plate 9 with
It is moved down simultaneously every pressing plate 5, the pressure in small chamber 1 quickly enters in big chamber 2, generates a fast-changing negative step of 1MPa
Pressure.Rise time, overshoot, the settling time that can analyze to obtain pressure sensor by the output of pressure sensor are harmonious
The characteristic indexs such as vibration frequency.
During the test, pressure initially set can be adjusted according to the supply gas source of size chamber.
Mechanical structure involved in Step Pressure driving source of the invention all have very long service life and it is long when
Between ability, and using gas medium is used continuously, sensor and use environment all will not be damaged and polluted.
Claims (3)
1. a kind of gas Step Pressure signal generator, it is characterised in that: include: small chamber (1), big chamber (2), the first spring (3),
Support rod (4), every pressing plate (5), second spring (6), partial gear (7), mass block (8), shock plate (9), big cavity pressure into
Export (10), small cavity pressure inlet and outlet (11)；
Generator is convex shape structure, and top is small chamber (1), and lower part is big chamber (2)；Generator center position is equipped with support
Bar (4)；Sleeve is installed on the part support rod (4) in big chamber (2), sleeve upper end is fixedly connected with every pressing plate (5), set
Cylinder passes through mass block (8) posterior end and is fixedly connected with shock plate (9)；The shock plate (9) and big chamber (2) lower surface keep away from
From；The area for being greater than small chamber (1) and big chamber (2) junction every pressing plate (5) surface area, so as to by small chamber (1) and big chamber (2)
It separates；First spring (3) is fixedly connected with small chamber (1) top, is fixedly connected afterwards with every pressing plate (5) around support rod (4)；Second
Spring (6) is wound on sleeve, and one end of second spring (6) is fixedly connected with every pressing plate (5), and the other end and mass block (8) are fixed
Connection；Mass block (8) side is provided with rack gear, and is engaged by the rack gear with partial gear (7)；It is provided on small chamber (1)
Small cavity pressure imports and exports (11)；Big cavity pressure inlet and outlet (10) are provided on big chamber (2).
2. a kind of gas Step Pressure signal generator as described in claim 1, it is characterised in that: the generator is worked
Journey are as follows: when carrying out positive step pressure testing, the gas in generator is emptied first, is then filled with and sets in big chamber (2)
The gas of pressure closes big cavity pressure inlet and outlet (10), it is ensured that device is in after closed environment, endless by rotating clockwise
All gear (7) drives mass block (8) to move up, squeezes second spring (6), when partial gear (7) rotation is not to having
Direction with teeth, second spring (6) generate powerful reaction force to mass block (8), make mass block (8) fast ram to impact
On plate (9), be due to shock plate (9) and between pressing plate (5) rigid connection, therefore shock in a flash, shock plate (9) with every
Pressing plate (5) moves down simultaneously, and the gas in big chamber (2) quickly enters in small chamber (1), generates a fast-changing positive step
Pressure.
3. a kind of gas Step Pressure signal generator as described in claim 1, it is characterised in that: the generator is worked
Journey are as follows: when carrying out the test of negative Step Pressure, the gas in generator is emptied first, is then filled with and sets in small chamber (1)
The gas of pressure closes small cavity pressure inlet and outlet (11)；When needing to do negative pressure negative step test, by the pressure in big chamber (2)
It is evacuated to negative pressure；When needing to do normal pressure negative step test, the pressure in big chamber (2) is emptied；Ensure that device is in closed environment
Later, by rotating clockwise partial gear (7), drive mass block (8) is moved up, and is squeezed second spring (6),
When partial gear (7) rotation to the direction of not tooth, second spring (6) generates powerful reaction force to mass block (8), makes
On mass block (8) fast ram to shock plate (9), it is rigid connection due to shock plate (9) and between pressing plate (5), therefore is hitting
It hitting in a flash, shock plate (9) moves down simultaneously with every pressing plate (5), and the pressure in small chamber (1) quickly enters in big chamber (2),
Generate a fast-changing negative Step Pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611098258.5A CN106768626B (en) | 2016-12-03 | 2016-12-03 | A kind of gas Step Pressure signal generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611098258.5A CN106768626B (en) | 2016-12-03 | 2016-12-03 | A kind of gas Step Pressure signal generator |
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| Publication Number | Publication Date |
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| CN106768626A CN106768626A (en) | 2017-05-31 |
| CN106768626B true CN106768626B (en) | 2019-03-08 |
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| CN201611098258.5A Active CN106768626B (en) | 2016-12-03 | 2016-12-03 | A kind of gas Step Pressure signal generator |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107884119B (en) * | 2017-11-08 | 2019-11-26 | 中国航空工业集团公司北京长城计量测试技术研究所 | A kind of mesolow gas pulses pressure generator |
| CN108458861B (en) * | 2018-02-08 | 2020-01-07 | 深圳天溯计量检测股份有限公司 | Durability testing device for new energy automobile |
| CN109443636B (en) * | 2018-11-13 | 2020-08-28 | 浙江大学 | Dynamic response evaluation device of strain type pressure test system |
| CN111220322B (en) * | 2019-11-08 | 2021-04-09 | 中北大学 | Negative step calibrating device |
| CN112284614A (en) * | 2020-11-08 | 2021-01-29 | 中国航空工业集团公司北京长城计量测试技术研究所 | Positive step force generator |
| CN112284680A (en) * | 2020-11-08 | 2021-01-29 | 中国航空工业集团公司北京长城计量测试技术研究所 | Step force generator |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000035367A (en) * | 1998-03-19 | 2000-02-02 | Luk Getriebe Syst Gmbh | Torque sensor |
| CN104062069A (en) * | 2014-06-18 | 2014-09-24 | 中北大学 | Impact type step pressure generating method |
| CN104132776A (en) * | 2014-08-15 | 2014-11-05 | 武汉市天虹仪表有限责任公司 | Gas pressure generating device for pressure calibration |
-
2016
- 2016-12-03 CN CN201611098258.5A patent/CN106768626B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000035367A (en) * | 1998-03-19 | 2000-02-02 | Luk Getriebe Syst Gmbh | Torque sensor |
| CN104062069A (en) * | 2014-06-18 | 2014-09-24 | 中北大学 | Impact type step pressure generating method |
| CN104132776A (en) * | 2014-08-15 | 2014-11-05 | 武汉市天虹仪表有限责任公司 | Gas pressure generating device for pressure calibration |
Non-Patent Citations (1)
| Title |
|---|
| 正弦压力发生器设计;王壮臣等;《佳木斯工学院学报》;19881231;第6卷(第4期);第15-19页 |
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