CN106997705A - A kind of gas pressure sensor demarcation teaching experimental base and its scaling method - Google Patents
A kind of gas pressure sensor demarcation teaching experimental base and its scaling method Download PDFInfo
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- CN106997705A CN106997705A CN201710250007.2A CN201710250007A CN106997705A CN 106997705 A CN106997705 A CN 106997705A CN 201710250007 A CN201710250007 A CN 201710250007A CN 106997705 A CN106997705 A CN 106997705A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/08—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics
- G09B23/12—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics of liquids or gases
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Abstract
The invention discloses a kind of gas pressure sensor demarcation teaching experimental base and its scaling method, experimental bench includes housing, air gauge, compression pump, gas conduit, adjusting pressuring knob, controller, RS232 interfaces and host computer；Gas conduit one end and compression pump gas outlet are fixedly linked, and the other end is provided with magnetic valve；Pressure sensor is additionally provided with gas conduit；Barometric pressure tap and gas conduit are fixedly linked；Adjusting pressuring knob is used to control calm the anger pump work, the output pressure of regulation compression pump；Controller and pressure sensor are electrically connected, and are connected by RS232 interfaces with host computer.During work, host computer input air pressure table need the atmospheric pressure value demarcated with and combine the magnitude of voltage of the corresponding pressure sensor of input air pressure value pressure sensor demarcated.The present invention is capable of the hardware configuration of observing system and deepens the understanding to transducer calibration by practical operation, is easy to maintenance, simple in construction.
Description
Technical field
The present invention relates to sensor teaching aid equipment field, more particularly to a kind of demarcation teaching of gas pressure sensor are real
Test platform and its scaling method.
Background technology
At present, sensor teaching aid equipment of the prior art is generally only and a certain sensor is arranged on to be fixed on
On Graphic Panel, by numeral method current sensor measured value on panel, sensor operating principles and measurement how is realized
It can only be combined by classroom instruction and picture, allow student's familiar with understanding operation principle, teaching efficiency is not good enough, and fixed Graphic Panel
Overall structure compares space-consuming, and needs periodically to being cleaned exposed to each outside parts, maintenance work fiber crops
Tired, more key is that its static characteristic can change sensor in use for some time, is needed again for actual use
Demarcation is carried out to sensor and can be only achieved good control effect, and the teaching bench for adding transducer calibration does not have substantially at present,
Student is caused to understand that the knowledge of sensor is not deep enough.
The content of the invention
The technical problems to be solved by the invention are that there is provided a kind of gas pressure for defect involved in background technology
Force sensor caliberating teaching experimental base and its scaling method.
The present invention uses following technical scheme to solve above-mentioned technical problem：
A kind of gas pressure sensor demarcates teaching experimental base, includes housing, air gauge, compression pump, gas conduit, pressure regulation
Knob, controller, RS232 interfaces and host computer；
The compression pump, gas conduit, controller are arranged in the housing, the air gauge, adjusting pressuring knob, RS232
Interface is set on the housing；
Described gas conduit one end and the compression pump gas outlet are fixedly linked, and the other end is provided with control gas conduit break-make
Magnetic valve；
The gas conduit is provided with the pressure sensor for being used for measuring air pressure in gas conduit；
The barometric pressure tap and the gas conduit are fixedly linked, for measuring the air pressure in gas conduit；
The adjusting pressuring knob is used to control the pump work of calming the anger, the output pressure of the regulation compression pump；
The controller and the pressure sensor are electrically connected, and pass through the RS232 interfaces and the host computer phase
Even, for receiving the AD values of pressure sensor feedback and passing it to the host computer；
The host computer is used to input the atmospheric pressure value for needing to demarcate and combines the corresponding pressure sensor of input air pressure value
AD values are demarcated to pressure sensor.
As a kind of gas pressure sensor demarcation further prioritization scheme of teaching experimental base of the invention, the housing is adopted
It is made of transparent plastic.
It is used as a kind of gas pressure sensor demarcation further prioritization scheme of teaching experimental base of the invention, the controller
Using Freescale MC9S08DZ60 single-chip microcomputers.
It is used as a kind of gas pressure sensor demarcation further prioritization scheme of teaching experimental base of the invention, the host computer
Using PC.
The invention also discloses it is a kind of based on the gas pressure sensor demarcate teaching experimental base scaling method, comprising with
Lower step：
Step 1), control magnetic valve is opened, and adjusting pressuring knob is screwed into the position that pressure value is 0, electromagnetism jam pot cover is then controlled
Hold one's breath body canal；
Step 2), write default first pressure threshold value as the gas pressure value for needing to demarcate in host computer；
Step 3), demarcated, scaling method is as follows：
Step 3.1), turn clockwise and adjusting pressuring knob and read barometric pressure value so that barometric pressure value and
Need the gas pressure value of demarcation identical；
Step 3.2), control host computer is passed to the AD values that controller obtains pressure sensor feedback, and by the AD values
Be converted to the magnitude of voltage of pressure sensor；
Step 3.3), it would be desirable to the gas pressure value of demarcation and the magnitude of voltage of pressure sensor are used as one group of demarcation number
According to record into host computer；
Step 4), the pressure value to current gas pressure table is carried out after increase 5Kpa operation, as the gas for needing to demarcate
In body pressure value write-in host computer；
Step 5), demarcated；
Step 6), repeat step 4) to step 5), until barometric pressure value is equal to default second pressure threshold
Value；
Step 7), write default second pressure threshold value as the gas pressure value for needing to demarcate in host computer；
Step 8), demarcated；
Step 9), control magnetic valve is opened, and after the gases at high pressure discharge in gas conduit, controls magnetic valve confining gas
Conduit；
Step 10), write default second pressure threshold value as the gas pressure value for needing to demarcate in host computer；
Step 11), demarcated；
Step 12), the pressure value to current gas pressure table is carried out after reduction 5Kpa operation, as the gas for needing to demarcate
In body pressure value write-in host computer；
Step 13), demarcated；
Step 14), repeat step 12) to step 13), until barometric pressure value is equal to default first pressure
Threshold value；
Step 15), write default first pressure threshold value as the gas pressure value for needing to demarcate in host computer；
Step 16), demarcated；
Step 17), control magnetic valve is opened, and the gases at high pressure in gas conduit are discharged；
Step 18), for all nominal datas, to the voltage of the wherein corresponding pressure sensor of identical gas pressure value
Value progress is taken after average operation, draws the curve map of pressure-magnitude of voltage.
The present invention uses above technical scheme compared with prior art, with following technique effect：
It is capable of the hardware configuration of observing system and the understanding to transducer calibration is deepened by practical operation, is easy to maintenance,
It is simple in construction.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation that compression pump in the present invention, gas conduit, pressure sensor, magnetic valve are engaged；
Fig. 3 is the schematic diagram of the monitoring interface of host computer in the present invention；
The nominal data of physical record when Fig. 4 is a specific embodiment experiment in the present invention；
Fig. 5 is sensor real work curve and theoretical fitting curve comparison figure in a specific embodiment in the present invention.
In figure, 1- housings, 2- air gauges, 3- compression pumps, 4- is calmed the anger pump steam inlet, and 5- compression pumps gas outlet, 6- gases are led
Pipe, 7- pressure sensors, 8- magnetic valves, 9- adjusting pressuring knobs, 10-PC machines.
Embodiment
Technical scheme is described in further detail below in conjunction with the accompanying drawings：
As depicted in figs. 1 and 2, the invention discloses a kind of gas pressure sensor demarcate teaching experimental base, comprising housing,
Air gauge, compression pump, gas conduit, adjusting pressuring knob, controller, RS232 interfaces and host computer；
The compression pump, gas conduit, controller are arranged in the housing, the air gauge, adjusting pressuring knob, RS232
Interface is set on the housing；
Described gas conduit one end and the compression pump gas outlet are fixedly linked, and the other end is provided with control gas conduit break-make
Magnetic valve；
The gas conduit is provided with the pressure sensor for being used for measuring air pressure in gas conduit；
The barometric pressure tap and the gas conduit are fixedly linked, for measuring the air pressure in gas conduit；
The adjusting pressuring knob is used to control the pump work of calming the anger, the output pressure of the regulation compression pump；
The controller and the pressure sensor are electrically connected, and pass through the RS232 interfaces and the host computer phase
Even, for receiving the AD values of pressure sensor feedback and passing it to the host computer；
The host computer is used to input the atmospheric pressure value for needing to demarcate and combines the corresponding pressure sensor of input air pressure value
AD values are demarcated to pressure sensor.
The housing is made of transparent plastic.
The controller uses Freescale MC9S08DZ60 single-chip microcomputers.
The host computer uses PC.
MC9S08DZ60 single-chip microcomputers are electrically connected by the USB interface of RS232 communication interfaces and PC, complete single-chip microcomputer and
The communication of host computer.
The invention also discloses it is a kind of based on the gas pressure sensor demarcate teaching experimental base scaling method, comprising with
Lower step：
Step 1), control magnetic valve is opened, and adjusting pressuring knob is screwed into the position that pressure value is 0, electromagnetism jam pot cover is then controlled
Hold one's breath body canal；
Step 2), write default first pressure threshold value as the gas pressure value for needing to demarcate in host computer；
Step 3), demarcated, scaling method is as follows：
Step 3.1), turn clockwise and adjusting pressuring knob and read barometric pressure value so that barometric pressure value and
Need the gas pressure value of demarcation identical；
Step 3.2), control host computer is passed to the AD values that controller obtains pressure sensor feedback, and by the AD values
Be converted to the magnitude of voltage of pressure sensor；
Step 3.3), it would be desirable to the gas pressure value of demarcation and the magnitude of voltage of pressure sensor are used as one group of demarcation number
According to record into host computer；
Step 4), the pressure value to current gas pressure table is carried out after increase 5Kpa operation, as the gas for needing to demarcate
In body pressure value write-in host computer；
Step 5), demarcated；
Step 6), repeat step 4) to step 5), until barometric pressure value is equal to default second pressure threshold
Value；
Step 7), write default second pressure threshold value as the gas pressure value for needing to demarcate in host computer；
Step 8), demarcated；
Step 9), control magnetic valve is opened, and after the gases at high pressure discharge in gas conduit, controls magnetic valve confining gas
Conduit；
Step 10), write default second pressure threshold value as the gas pressure value for needing to demarcate in host computer；
Step 11), demarcated；
Step 12), the pressure value to current gas pressure table is carried out after reduction 5Kpa operation, as the gas for needing to demarcate
In body pressure value write-in host computer；
Step 13), demarcated；
Step 14), repeat step 12) to step 13), until barometric pressure value is equal to default first pressure
Threshold value；
Step 15), write default first pressure threshold value as the gas pressure value for needing to demarcate in host computer；
Step 16), demarcated；
Step 17), control magnetic valve is opened, and the gases at high pressure in gas conduit are discharged；
Step 18), for all nominal datas, to the voltage of the wherein corresponding pressure sensor of identical gas pressure value
Value progress is taken after average operation, draws the curve map of pressure-magnitude of voltage.
In the embodiment shown in fig. 3, program stopped button is included immediately below host computer interface and serial ports opens button, experiment
Start to be first turned on the left of the real-time monitoring of serial ports guarantee, interface including Experiment name, port numbers, reading buffering area, AD values, reference
Pressure, gauge pressure, demarcation, this nine Option Boxs of drafting curve click on data of the demarcation button record per minor tick 5Kpa, when
Experiment is finished, and is clicked on and is drawn the curve map that curve button draws pressure-magnitude of voltage.
Shown in Fig. 4 and Fig. 5, the data of physical record when Fig. 4 is one group of experiment, Fig. 5 curves are the biography of one embodiment
Sensor real work curve and theoretical fitting curve comparison figure.It is implemented as follows：Sensor characteristic approximating method is used
Least square method, it is linear equation to make sensor characteristics equation：Y=B+KX.Wherein X for each calibration value of correspondence output valve (i.e.
Gage pressure value), Y is calibration engineering value (i.e. magnitude of voltage), and K is linear equation slope, and B is linear equation intercept.By minimum
The calculating formula that square law can obtain K, B is respectively：
Wherein, N is total calibration points, i=1,2....., N.
Sensor's Static characteristic is characterized using nonlinearity.It reflects that sensor real work curve and theoretical fitting are straight
The inconsistency of line, be defined as the real work curve determined by experiment of sensor to the maximum deviation of theoretical fitting straight line with
The percentage of full scale is exported, i.e.,
As shown in Figure 5, real work curve is the heavy line with square frame, and theoretical fitting curve is fine line, theoretical fitting
Curvilinear equation is y=1.0426x, and real work curve deviation theory matched curve spacing in 5KPa is maximum, takes this point value meter
Calculate nonlinearity：
To this completion transducer calibration experiment, the functional relation for inputting and exporting in Sensor's Static characteristic is found out, at this
Nonlinearity shows that the sensor can still be used when required precision is not high for 4.2% in embodiment.
Those skilled in the art of the present technique are it is understood that unless otherwise defined, all terms used herein (including skill
Art term and scientific terminology) with the general understanding identical meaning with the those of ordinary skill in art of the present invention.Also
It should be understood that those terms defined in such as general dictionary should be understood that with the context of prior art
The consistent meaning of meaning, and unless defined as here, will not be explained with idealization or excessively formal implication.
Above-described embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not limited to this hair
Bright, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc. should be included in the present invention
Protection domain within.
Claims (5)
1. a kind of gas pressure sensor demarcates teaching experimental base, it is characterised in that include housing, air gauge, compression pump, gas
Conduit, adjusting pressuring knob, controller, RS232 interfaces and host computer；
The compression pump, gas conduit, controller are arranged in the housing, the air gauge, adjusting pressuring knob, RS232 interfaces
Set on the housing；
Described gas conduit one end and the compression pump gas outlet are fixedly linked, electricity of the other end provided with control gas conduit break-make
Magnet valve；
The gas conduit is provided with the pressure sensor for being used for measuring air pressure in gas conduit；
The barometric pressure tap and the gas conduit are fixedly linked, for measuring the air pressure in gas conduit；
The adjusting pressuring knob is used to control the pump work of calming the anger, the output pressure of the regulation compression pump；
The controller and the pressure sensor are electrically connected, and are connected by the RS232 interfaces with the host computer, use
In receive pressure sensor feedback AD values and pass it to the host computer；
The host computer is used to input the atmospheric pressure value for needing to demarcate and combines the AD values of the corresponding pressure sensor of input air pressure value
To be demarcated to pressure sensor.
2. gas pressure sensor according to claim 1 demarcates teaching experimental base, it is characterised in that the housing is used
Transparent plastic is made.
3. gas pressure sensor according to claim 1 demarcates teaching experimental base, it is characterised in that the controller is adopted
With Freescale MC9S08DZ60 single-chip microcomputers.
4. gas pressure sensor according to claim 1 demarcates teaching experimental base, it is characterised in that the host computer is adopted
Use PC.
5. the scaling method of teaching experimental base is demarcated based on the gas pressure sensor described in claim 1, it is characterised in that bag
Containing following steps：
Step 1）, control magnetic valve opening, it is 0 position that adjusting pressuring knob is screwed into pressure value, then controls electromagnetism valve closure gas
Body canal；
Step 2）, write default first pressure threshold value as the gas pressure value for needing to demarcate in host computer；
Step 3）, demarcated, scaling method is as follows：
Step 3.1）, turn clockwise and adjusting pressuring knob and read barometric pressure value so that barometric pressure value and needs
The gas pressure value of demarcation is identical；
Step 3.2）, control host computer is passed to the AD values that controller obtains pressure sensor feedback, and the AD values are changed
For the magnitude of voltage of pressure sensor；
Step 3.3）, it would be desirable to the gas pressure value of demarcation and the magnitude of voltage of pressure sensor are remembered as one group of nominal data
Record is into host computer；
Step 4）, the pressure value to current gas pressure table is carried out after increase 5Kpa operation, as the gas pressure for needing to demarcate
In force value write-in host computer；
Step 5）, demarcated；
Step 6）, repeat step 4）To step 5）, until barometric pressure value is equal to default second pressure threshold value；
Step 7）, write default second pressure threshold value as the gas pressure value for needing to demarcate in host computer；
Step 8）, demarcated；
Step 9）, control magnetic valve is opened, after the gases at high pressure in gas conduit are discharged, and control magnetic valve confining gas is led
Pipe；
Step 10）, write default second pressure threshold value as the gas pressure value for needing to demarcate in host computer；
Step 11）, demarcated；
Step 12）, the pressure value to current gas pressure table is carried out after reduction 5Kpa operation, as the gas pressure for needing to demarcate
In force value write-in host computer；
Step 13）, demarcated；
Step 14）, repeat step 12）To step 13）, until barometric pressure value is equal to default first pressure threshold
Value；
Step 15）, write default first pressure threshold value as the gas pressure value for needing to demarcate in host computer；
Step 16）, demarcated；
Step 17）, control magnetic valve is opened, by the gases at high pressure discharge in gas conduit；
Step 18）, for all nominal datas, the magnitude of voltage of the wherein corresponding pressure sensor of identical gas pressure value is entered
Row is taken after average operation, draws the curve map of pressure-magnitude of voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710250007.2A CN106997705A (en) | 2017-04-17 | 2017-04-17 | A kind of gas pressure sensor demarcation teaching experimental base and its scaling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710250007.2A CN106997705A (en) | 2017-04-17 | 2017-04-17 | A kind of gas pressure sensor demarcation teaching experimental base and its scaling method |
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| Publication Number | Publication Date |
|---|---|
| CN106997705A true CN106997705A (en) | 2017-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710250007.2A Pending CN106997705A (en) | 2017-04-17 | 2017-04-17 | A kind of gas pressure sensor demarcation teaching experimental base and its scaling method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109932895A (en) * | 2019-03-19 | 2019-06-25 | 南京航空航天大学 | A kind of motor speed control teaching experimental base and its application method |
| CN110542535A (en) * | 2019-07-29 | 2019-12-06 | 中国空气动力研究与发展中心 | Normalization method for pulse wind tunnel multi-sensor negative pressure test system |
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| US20030226392A1 (en) * | 2002-06-05 | 2003-12-11 | Robert Naumiec | Calibration method and system for a dynamic combustor sensor |
| CN102445303A (en) * | 2011-11-28 | 2012-05-09 | 武汉理工大学 | Experiment table for mass calibration of oil pressure sensor |
| CN102809463A (en) * | 2011-06-03 | 2012-12-05 | 上海保隆汽车科技股份有限公司 | Method and device for calibrating pressure sensors in batches |
| CN103645010A (en) * | 2013-12-09 | 2014-03-19 | 湖北汽车工业学院 | Gas pressure sensor test method for braking system and test system thereof |
| CN105527374A (en) * | 2014-10-24 | 2016-04-27 | 霍尼韦尔国际公司 | Automatic calibration system and gas supply method thereof |
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2017
- 2017-04-17 CN CN201710250007.2A patent/CN106997705A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030226392A1 (en) * | 2002-06-05 | 2003-12-11 | Robert Naumiec | Calibration method and system for a dynamic combustor sensor |
| CN102809463A (en) * | 2011-06-03 | 2012-12-05 | 上海保隆汽车科技股份有限公司 | Method and device for calibrating pressure sensors in batches |
| CN102445303A (en) * | 2011-11-28 | 2012-05-09 | 武汉理工大学 | Experiment table for mass calibration of oil pressure sensor |
| CN103645010A (en) * | 2013-12-09 | 2014-03-19 | 湖北汽车工业学院 | Gas pressure sensor test method for braking system and test system thereof |
| CN105527374A (en) * | 2014-10-24 | 2016-04-27 | 霍尼韦尔国际公司 | Automatic calibration system and gas supply method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109932895A (en) * | 2019-03-19 | 2019-06-25 | 南京航空航天大学 | A kind of motor speed control teaching experimental base and its application method |
| CN110542535A (en) * | 2019-07-29 | 2019-12-06 | 中国空气动力研究与发展中心 | Normalization method for pulse wind tunnel multi-sensor negative pressure test system |
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