CN85104740B - Hydraulic dynamic testing system used for pressure sensor - Google Patents
Hydraulic dynamic testing system used for pressure sensor Download PDFInfo
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- CN85104740B CN85104740B CN85104740A CN85104740A CN85104740B CN 85104740 B CN85104740 B CN 85104740B CN 85104740 A CN85104740 A CN 85104740A CN 85104740 A CN85104740 A CN 85104740A CN 85104740 B CN85104740 B CN 85104740B
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- pressure
- pressure transducer
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- pressure sensor
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- Measuring Fluid Pressure (AREA)
Abstract
The present invention relates to a metering test system used for testing dynamic characteristics of a pressure sensor. The method and the principle which are used by the present invention are novel and creative. The test pressure can be freely regulated within the pressure range of a plurality of kilograms to thousands of kilograms. The occupation area of the present invention is only a few square meters; the present invention has the advantages of easy assembly and disassembly, easy carrying and low investment (only about one tenth of the shock tube method). The test cost of a single pressure sensor is only about 1/200 to 1/500 of the shock tube method. The present invention is safe and reliable in use, and is high in test precision due to the adoption of some measures; the advantages of the present invention is obviously displayed under large test pressure.
Description
A kind of hydraulic dynamic testing system used for pressure sensor of setting up on the new principle basis belongs to the metrology and measurement class.
Pressure transducer is carried out dynamic test both at home and abroad at present, shock tube method in vogue, but experimental pressure has only tens kilograms of pressure to hundreds of kilogram pressure.Single testing expense of pressure transducer needs hundreds of unit to several thousand yuan.Set up the shock tube equipment of a cover experimental pressure at 1000 kilograms of pressure, capital investment is estimated to want about 1,000,000 yuan, and (2 04 in Xi'an), because due to the principle, pressure is higher, the degree of confidence of experimental result is just lower, safety problem also is difficult for solving.Other method as drop hammer, gunpowder explosion, high-speed switch etc., experimental pressure can be accomplished bigger, but desire is tried the pressure transducer dynamic perfromance of high frequency range and is had any problem, the precision that mainly is test result is difficult for reaching, and the domestic and international at present dynamic characteristic test to the high frequency range pressure transducer of big pressure still has difficulties.
The present invention is used for the pressure transducer dynamic test, because it is the application of the mechanics effect of electrohydraulic effect, so claim hydraulic dynamic testing system used, the mechanics effect of electrohydraulic effect, be widely used in ore reduction at present, cast(ing) surface sand removal, kidney stone fragmentation, but be used for the pressure transducer dynamic test, currently at home and abroad still belong to the first time.Because it is different with existing method that the obtaining of pumping signal is based on, require experimental pressure height not only safety but also the difficulty that is difficult to overcome that has aspect such as certain precision to exist in the present pressure dynamic test so solved.
Hydraulic dynamic testing system used its method of sensor and principle and existing shock tube, drop hammer etc. different, so overcome the problem and the difficulty that in the pressure transducer dynamic test, exist at present.Can obtain experimental pressure with hydraulic dynamic testing system used for pressure sensor is 5000 kilograms to 10000 kilograms pressure.Equipment capital investment only is about 1/10 of shock tube method.Single pressure transducer testing expense only is about 1/200～1/500 of a shock tube method.Pressure transducer frequency range 5,000,000 all can be tested with interior.
Use a kind of new principle to obtain test of pulse pressure, set up an experimental pressure can be in several kilograms to several thousand kilograms pressure limits regulated at will, equipment capital investment is little, experimental expenses is low, only 2～3 square metres of floor areas, easily the dress folding be easy to carry, Data Processing in Experiment (in a few minutes can in the on-the-spot dynamic perfromance that obtain tested pressure transducer of experiment) fast, a logarithm pressure transducer carries out the novel dynamic test system of pressure transducer of dynamic test simultaneously on an equipment.
The cardinal principle of this invention is that commercial power is risen to tens thousand of volts., and sparking electrode placed in the dielectric fluid to low electrification capacity charge by rectification, electric energy is discharged suddenly, thereby produce the pressure pulse of an approximate δ function, as driving source, come the dynamic perfromance of gaging pressure sensor with this.Can obtain amplitude spectrum, transport function, logarithm magnitude-phase characteristics of pressure transducer etc. by routine package.
Hydraulic dynamic testing system used for pressure sensor is made up of following main several parts, is respectively described below:
(1) heavy impulse current device:
Come down to a charge-discharge circuit, purpose is to obtain energy and low-inductive capacitor is charged from electrical network, utilizes it to provide power for experimental signal.
Control desk for improving the stability of sparking voltage, has sparking voltage that switch is set on the control platform except discharge and recharge and igniting etc. controlled, and voltage surpasses or when being lower than the required value margin tolerance, firing circuit is protected automatically, and discharge can not be carried out.The directly control knob of lifting pressure sensor experiment stand also is housed on control desk in addition.
(2) arc chamber and experiment table:
This is the place that forms pressure pulse and carry out the product experiment, according to calculation requirement, can distribute several pressure transducers are installed, to improve conventional efficient on experimental stand.In order to improve measuring accuracy, must eliminate the influence of wave reflection and interference, for this reason, cancel the ripple facility the arc chamber planted agent, metal frame should be made into the wedge shape structure with certain angle meeting the ripple direction.Should design a reflex housing in addition, the reflex housing curved surface should calculate through strict.In arc chamber, there is a specular dead like this, pressure transducer and electrode are placed in the blind area.
In addition, in order to obtain the dynamic model of comparatively accurate tested pressure transducer, can a precision height, the wide pressure transducer more than 5～10 times of the tested pressure transducer of duty-cycle be installed with tested pressure transducer equivalent position.Its output signal is imported computing machine with tested pressure transducer output signal, to ask for the mathematical model of tested pressure transducer.
In order there to be the rapid-mounted metal to ignite the device of silk between the stability that guarantees to discharge, two discharge electrodes, can guarantee that metal is ignited the each length of silk and rate of tension is approaching.
(3) data acquisition and disposal system.
Test all kinds of pressure transducer dynamic perfromances with hydraulic dynamic testing system used for pressure sensor, begin only to need time a few minutes to obtaining experimental result from experiment.Data processing can off line also can be carried out at the scene, laboratory.Can obtain the amplitude spectrum curve of tested pressure transducer, transport function, logarithm amplitude/phase characteristic curves.
Accompanying drawing is a principle schematic of the present invention, wherein:
1, heavy impulse current device 2, arc chamber and experiment table 3, ignition silk 4, electrode 5, pressure transducer 6, dielectric fluid 7, plastic of adsorbing wave and reflex housing 8, data acquisition and disposal system.
Claims (4)
1, a kind of hydraulic dynamic testing system used for pressure sensor of making according to the mechanics effect principle of electrohydraulic effect comprises:
A, heavy impulse current device come down to a charge-discharge circuit, and it obtains energy and to the electric capacity charging, utilize it to provide power for experimental signal from electrical network;
B, arc chamber, it is equipped with dielectric fluid and has sparking electrode, and electric energy discharges suddenly in this dielectric fluid, produces the pressure pulse of an approximate δ function, a reflex housing is set in the arc chamber, makes to exist a specular dead pressure transducer can be placed in the blind area in the arc chamber.
C, experiment table, four pressure transducers that on experiment table, can be installed simultaneously, a precision height, the wide pressure transducer more than 5～10 times of the tested pressure transducer of duty-cycle.Its output signal is imported computing machine with tested pressure transducer output signal, to ask for the mathematical model of tested pressure transducer.The experiment table metal frame should be made into the wedge shape structure with certain angle meeting the ripple direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85104740A CN85104740B (en) | 1985-06-24 | 1985-06-24 | Hydraulic dynamic testing system used for pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85104740A CN85104740B (en) | 1985-06-24 | 1985-06-24 | Hydraulic dynamic testing system used for pressure sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85104740A CN85104740A (en) | 1987-01-07 |
| CN85104740B true CN85104740B (en) | 1988-06-08 |
Family
ID=4794027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85104740A Expired CN85104740B (en) | 1985-06-24 | 1985-06-24 | Hydraulic dynamic testing system used for pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85104740B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519663B (en) * | 2011-12-08 | 2013-10-02 | 武汉理工大学 | Polymer film optical fiber F-P cavity-based underwater shock pressure sensor and dynamic calibration experiment system thereof |
| CN105547582A (en) * | 2015-12-03 | 2016-05-04 | 中国航空工业集团公司北京长城计量测试技术研究所 | Portable pulse stress generator |
| US20180080854A1 (en) * | 2016-09-20 | 2018-03-22 | Ford Global Technologies, Llc | Vehicle impact testing |
| CN106441694A (en) * | 2016-10-10 | 2017-02-22 | 海南大学 | Fluid pressure sensor |
| CN106525331B (en) * | 2016-11-25 | 2022-09-30 | 中国人民解放军61489部队 | Pen type free field pressure sensor calibration device |
-
1985
- 1985-06-24 CN CN85104740A patent/CN85104740B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85104740A (en) | 1987-01-07 |
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