CN101281074B - Pressure sensor calibrating method for test system with calibration scale - Google Patents
Pressure sensor calibrating method for test system with calibration scale Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000012360 testing method Methods 0.000 title claims abstract description 16
- 238000005259 measurement Methods 0.000 claims description 7
- 230000011218 segmentation Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 2
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims 1
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- 238000012986 modification Methods 0.000 description 2
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- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 description 1
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Abstract
The present invention relates to a calibration method of a pressure sensor of a testing system with calibration scale; the method comprises the steps of: a) using the piezometric tube to connect the standard pressure generator and the pressure sensor of the testing system in series; b) linearly dividing the corresponding relationship between the signal and the range of the pressure sensor; c) ensuring the numbers N of the calibration points, and filling in the calibration scale with the signal of each calibration point and the predetermined value of the range of the pressure sensor corresponding to the signal; d) detecting the precision of the pressure sensor, pressing on the standard pressure generator in section; when the measuring and controlling system displays each predetermined value of the pressure sensor in the calibration scale in the step c), recording each pressure valve of the standard pressure generator corresponding to the pressure sensor; e) modifying the calibration scale, using each pressure valve of the standard pressure generator in the step d) to instead of each predetermined value of the pressure sensor in the calibration scale corresponding to the standard pressure generator.
Description
Technical field
The present invention relates to a kind of scaling method of pressure transducer, relate in particular to the scaling method of the pressure transducer of the test macro that is used to have calibration scale.
Background technology
In the TT﹠C system, pressure transducer uses frequent, and sensor uses for a long time, and linear change or zero point drift can take place, and can seriously distort experimental result.Detect sensor commonly used, the time interval is long, and expense height, and testing requirements difference are changed sensor through regular meeting, perhaps add measurement point, and sensor can't be in slave mode fully, and its practical application causes very big deviation.
Scaling method commonly used in the prior art is as follows:
To export 0 ~ 5V, the sensor of range-100 ~ 100KPa is an example
1. piezometric tube is connected in series the pressure transducer of normal pressure generator and TT﹠C system
2. according to the corresponding relation of the linear division signals of perfect condition (voltage) with transducer range (KPa), as follows:
| ?0 | ?0.5V | ?1V | ?1.5V | ?2.0V | 2.5V | 3.0V | 3.5V | 4.0V | 4.5V | 5V |
| ?-100?KPa | ?-80?KPa | ?-60?KPa | ?-40?KPa | ?-20?KPa | 0 | 20 KPa | 40 KPa | 60 KPa | 80 KPa | 100 KPa |
3. be example with 3 demarcation, fill in calibration scale
| 1.Raw | 1.Phys | 2.Raw | 2.Phys | 3.Raw | ?3.Phys |
| 0.5V | -80KPa | 2.5V | 0 | 5V | ?100KPa |
4. sensor accuracy detects, normal pressure generator generation-80KPa, and 0, three normal pressures of 100KPa, TT﹠C system shows respectively-79.78KPa, 0.09KPa, 99.83KPa. illustrates that sensor has error by complete linear measurement.
5. modification calibration scale ,-79.78KPa, 0.09KPa, 99.83KPa, three values are inserted calibration scale
| 1.Raw | 1.Phys | 2.Raw | 2.Phys | 3.Raw | 3.Phys |
| 0.5V | -79.78 KPa | 2.5V | 0.09KPa | 5V | 99.83 KPa |
6. detecting sensor once more is forced into respectively on the normal pressure generator-80KPa, and 0,100KPa, TT﹠C system display result
| Normal pressure value (KPa) | TT﹠C system indicating value (KPa) |
| -80 | -79.56 |
| 0 | 0.13 |
| 100 | 99.54 |
From above table, the difference of calibration back TT﹠C system indicating value and normal pressure value is bigger as can be seen.
Summary of the invention
The technical problem to be solved in the present invention is in order to satisfy testing requirement, to solve not exclusively controlled problem of sensor, providing a kind of new pressure transducer detection, scaling method at this.
According to embodiments of the invention, a kind of pressure sensor calibrating method that is used to have the test macro of calibration scale is provided, this method comprises the steps:
A) with the pressure transducer of piezometric tube serial connection normal pressure generator and TT﹠C system;
B) corresponding relation of linear division signals and pressure transducer range;
C) determine the number N of calibration point, and in calibration scale, fill in the signal of each calibration point and the predetermined value in the pressure transducer range corresponding with this signal;
D) precision of detected pressures sensor, segmentation is exerted pressure on the normal pressure generator, TT﹠C system is step display c respectively) calibration scale in during each predetermined value of pressure transducer, record is each pressure values of corresponding normal pressure generator with it;
E) revise calibration scale, with each predetermined value of pressure transducer in alternative its corresponding calibration scale of each pressure values of standard pressure generator in the step d).
According to above-mentioned scaling method, wherein said signal is a voltage signal, and described predetermined value is a pressure values.
According to above-mentioned scaling method, the output area of wherein said voltage signal is 0～5V, and the scope of described predetermined value is-100～100KPa.
According to above-mentioned scaling method, the number N of wherein said calibration point is 3.
According to another embodiment of the present invention, provide a kind of pressure sensor calibrating method that is used to have the test macro of calibration scale, this method comprises the steps:
A) with the pressure transducer of piezometric tube serial connection normal pressure generator and TT﹠C system;
B) corresponding relation of linear division signals and pressure transducer range;
C) determine the number N of calibration point, and in calibration scale, fill in the signal of each calibration point and the predetermined value in the pressure transducer range corresponding with this signal;
D) precision of detected pressures sensor, segmentation is exerted pressure on the normal pressure generator, TT﹠C system is step display c respectively) calibration scale in during each predetermined value of pressure transducer, record is each pressure values of corresponding normal pressure generator with it;
E) revise calibration scale, with each predetermined value of pressure transducer in alternative its corresponding calibration scale of each pressure values of standard pressure generator in the step d);
Repeating said steps is a) to step e), to continue to improve the precision of sensor.
According to above-mentioned scaling method, wherein said signal is a voltage signal, and described predetermined value is a pressure values.
According to above-mentioned scaling method, the output area of wherein said voltage signal is 0-5V, and the scope of described predetermined value is-100 ~ 100KPa.
According to above-mentioned scaling method, the number N of wherein said calibration point is 3.
According to another embodiment of the present invention, provide a kind of pressure sensor calibrating method that is used to have the test macro of calibration scale, this method comprises the steps:
A) with the pressure transducer of piezometric tube serial connection normal pressure generator and TT﹠C system;
B) corresponding relation of linear division signals and pressure transducer range;
C) determine the number N of calibration point, and in calibration scale, fill in the signal of each calibration point and the predetermined value in the pressure transducer range corresponding with this signal;
D) precision of detected pressures sensor, segmentation is exerted pressure on the normal pressure generator, TT﹠C system is step display c respectively) calibration scale in during each predetermined value of pressure transducer, record is each pressure values of corresponding normal pressure generator with it;
E) revise calibration scale, with each predetermined value of pressure transducer in alternative its corresponding calibration scale of each pressure values of standard pressure generator in the step d);
F) on the normal pressure generator, apply the pressure of each predetermined value in the step c) respectively, the record pressure that this moment, measuring system showed, the pressure of judging sensor measurement thus is poor with the pressure of normal pressure generator generation.
According to above-mentioned scaling method, wherein also comprise repeating said steps a) to step f), the pressure values of measurement that makes sensor is more near the actual pressure value.
The present invention adopts a kind of high-precision pressure criteria device, each pressure transducer of using with our TT﹠C system compares, judge that its error is whether within the scope that we allow, revise and improve calibration scale, accurately find out the one-to-one relationship between electric signal and the pressure, its corresponding relation is input to computer, after computer receives electric signal, pass through calibration scale, change corresponding force value, thereby obtain truly, force value accurately, the warranty test result's is true, reliable, effectively, provides foundation for designing and developing.This methods and results is true, and is simple to operate, convenient and practical.Demarcate duration and only need demarcate this pressure criteria device, need not that all the sensors is delivered to the First Astronautic Research Institute for Measurement and Test and demarcate, save demarcation expense and time greatly.
Description of drawings
Fig. 1 is the test macro work synoptic diagram of nominal pressure sensor of the present invention.
Embodiment
To describe embodiments of the invention below, Fig. 1 is the test macro work synoptic diagram of nominal pressure sensor of the present invention.
To export 0 ~ 5V, the sensor of range-100 ~ 100KPa is an example according to the embodiment of the invention.
1. piezometric tube is connected in series the pressure transducer of normal pressure generator and TT﹠C system:
2. according to the corresponding relation of the linear division signals of perfect condition (voltage) with transducer range (KPa), as follows
| ?0V | ?0.5V | ?1V | ?1.5V | ?2.0V | 2.5V | 3.0V | 3.5V | 4.0V | 4.5V | 5V |
| ?-100?KPa | ?-80?KPa | ?-60?KPa | ?-40?KPa | ?-20?KPa | 0 | 20 KPa | 40 KPa | 60 KPa | 80 KPa | 100 KPa |
3. fill in calibration scale, can multi-point calibration, can be divided into 16 points at most, cut-point is many more, and sensor just can be more accurate, is example with 3 demarcation:
| 1.Raw | 1.Phys | 2.Raw | 2.Phys | 3.Raw | ?3.Phys |
| 0.5V | -80KPa | 2.5V | 0 | 5V | ?100KPa |
4. detecting sensor precision, TT﹠C system show respectively-80KPa, 0, and three values that 100KPa, pressure calibration are corresponding with it ,-80.2KPa, 0.35KPa, 100.54KPa.
5. modification calibration scale ,-80.2KPa, 0.35KPa, three values of 100.54KPa. are inserted calibration scale again
| 1.Raw | 1.Phys | 2.Raw | 2.Phys | 3.Raw | 3.Phys |
| 0.5V | -80.2 KPa | 2.5V | 0 | 5V | 100.54 KPa |
6. the precision after detecting sensor is calibrated once more, pressure calibration device segmentation pressurization, to-80KPa, 0,100KPa, observing and controlling display result
| Pressure criteria indicating value (KPa) | TT﹠C system indicating value (KPa) |
| -80 | -79.91 |
| 0 | 0.29 |
| 100 | 100.06 |
7. the result before and after the sensor calibration more once:
| Before the correction (KPa) | After the correction (KPa) | ||||
| Normal pressure | Sensor shows | Difference | Normal pressure | Sensor shows | Difference |
| -80 | -80.2 | 0.20 | -80 | -79.91 | 0.09 |
| 0 | 0.35 | 0.35 | 0 | 0.29 | 0.29 |
| 100 | 100.54 | 0.54 | 100 | 100.06 | 0.06 |
Error before error ratio after proofreading and correct is proofreaied and correct is little, reaches alignment purpose, and so said method carries out repeatedly, can be infinitely near its true pressure value.
Claims (2)
1. a pressure sensor calibrating method that is used to have the test macro of calibration scale is characterized in that, comprises the steps:
A) with the pressure transducer of piezometric tube serial connection normal pressure generator and TT﹠C system;
B) the linear corresponding relation of dividing voltage signal and pressure transducer range, the output area of this voltage signal is 0-5V;
C) determine the number 3 of calibration point, and fill in the voltage signal of each calibration point and the pressure values in the pressure transducer range corresponding with this voltage signal in calibration scale, the scope of this pressure values is one 100～100KPa;
D) precision of detected pressures sensor, segmentation is exerted pressure on the normal pressure generator, TT﹠C system is step display c respectively) each pressure values the time, record is each pressure values of corresponding normal pressure generator with it;
E) revise calibration scale, with each pressure values of pressure transducer in alternative its corresponding calibration scale of each pressure values of standard pressure generator in the step d);
F) repeating said steps is a) to step e), to continue to improve the precision of sensor;
G) pressure transducer after the detection calibration, on the normal pressure generator, apply the pressure of each pressure values in the step c) respectively, the pressure that record this moment, measuring system showed, the pressure of judging sensor measurement thus is poor with the pressure of normal pressure generator generation.
2. the pressure sensor calibrating method that is used to have the test macro of calibration scale as claimed in claim 1 wherein also comprises repeating said steps a) to step g), and the pressure values of measurement that makes sensor is more near the actual pressure value.
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| CN2007103025388A CN101281074B (en) | 2007-12-28 | 2007-12-28 | Pressure sensor calibrating method for test system with calibration scale |
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| CN2007103025388A CN101281074B (en) | 2007-12-28 | 2007-12-28 | Pressure sensor calibrating method for test system with calibration scale |
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| CN101281074B true CN101281074B (en) | 2011-05-11 |
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| US8561453B2 (en) * | 2010-09-14 | 2013-10-22 | GM Global Technology Operations LLC | Calibration of all pressure transducers in a hydrogen storage system |
| CN104568078B (en) * | 2013-10-21 | 2018-01-16 | 哈尔滨飞机工业集团有限责任公司 | A kind of method of field calibration ground hydraulic exerciser |
| CN103884458B (en) * | 2014-03-27 | 2016-01-20 | 东南大学 | A kind of two-way interior force measuring sensors of thin bar and scaling method |
| CN105738031A (en) * | 2016-02-01 | 2016-07-06 | 安徽中科本元信息科技有限公司 | Air pressure type flexible array pressure sensor calibration device and calibration method |
| CN105716787A (en) * | 2016-02-19 | 2016-06-29 | 云南电网有限责任公司电力科学研究院 | Calibration method of fiber grating pressure sensor |
| CN106525332A (en) * | 2016-12-15 | 2017-03-22 | 上海市共进通信技术有限公司 | Calibration method of flexible pressure sensor |
| CN107702848A (en) * | 2017-10-25 | 2018-02-16 | 北京航天发射技术研究所 | A kind of sensor online calibration method in special purpose vehicle |
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| CN109269715A (en) * | 2018-09-11 | 2019-01-25 | 海恩思(深圳)信息科技有限公司 | A kind of test method of organism pressure sensor |
| CN110617918B (en) * | 2019-10-31 | 2022-03-29 | 广东利元亨智能装备股份有限公司 | Pressure calibration mechanism and pressure calibration method |
| CN111854913A (en) * | 2020-07-20 | 2020-10-30 | 洛阳卡瑞起重设备有限公司 | Five-point calibration method based on load lifting limiter |
| CN115373372A (en) * | 2022-10-08 | 2022-11-22 | 傲拓科技股份有限公司 | Calibration method of analog quantity measurement module |
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