CN203011606U - Resistance strain gauge based intelligent pressure detecting system - Google Patents
Resistance strain gauge based intelligent pressure detecting system Download PDFInfo
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- CN203011606U CN203011606U CN 201220602330 CN201220602330U CN203011606U CN 203011606 U CN203011606 U CN 203011606U CN 201220602330 CN201220602330 CN 201220602330 CN 201220602330 U CN201220602330 U CN 201220602330U CN 203011606 U CN203011606 U CN 203011606U
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- resistance strain
- strain gage
- chip microcomputer
- intelligent pressure
- detection system
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- 238000001514 detection method Methods 0.000 claims description 14
- 239000000758 substrate Substances 0.000 claims description 11
- 239000000839 emulsion Substances 0.000 claims description 8
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 3
- 230000004044 response Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model discloses a resistance strain gauge based intelligent pressure detecting system, comprising a single-chip microcomputer, a signal amplifier connected with the A/D converter, a strain type pressure sensor connected with the signal amplifier, and a keyboard, an LED (Light-Emitting Diode) display and an A/D converter respectively connected with the single-chip microcomputer,. The strain type pressure sensor is employed in the utility model, and is full-bridge differentially connected, and a tri-operation amplifier is used; and compared with the prior art, the resistance strain gauge based intelligent pressure detecting system is simpler in structure, higher in sensitivity, faster in response and more precise in measurement.
Description
Technical field
The utility model relates to data collecting field, specifically, is based on the intelligent pressure detection system of resistance strain gage.
Background technology
Pressure survey has great importance to Real-Time Monitoring and safety in production.In commercial production, for efficient, safety in production, the major parameters such as pressure, flow, temperature in necessary effectively production control process.Because pressure control plays conclusive safety effect in process of production, therefore be necessary Measurement accuracy pressure.And in existing pressure detection technology, often have the inadequate problem of pressure detection precision, and complex structure, wayward.
The utility model content
The purpose of this utility model is to provide the intelligent pressure detection system based on resistance strain gage, by the pressure swing type pressure transducer, pressure signal is changed into electric signal, and is simple in structure, sensitive reliable; Show output by light-emitting diode display, make the user can receive more intuitively testing result, the utility model has improved the work efficiency of whole system effectively mainly for the pressure detection in commercial production.
The utility model is achieved through the following technical solutions: based on the intelligent pressure detection system of resistance strain gage, comprise single-chip microcomputer, and be connected to keyboard, light-emitting diode display and A/D converter on single-chip microcomputer, also comprise the signal amplifier that is connected on A/D converter, and the strain pressure transducer that is connected with signal amplifier.
Be provided with resistance strain gage in strain pressure transducer; Strain pressure transducer is that the variation that the variation of pressure converts resistance value to is measured, resistance strain gage is the resistive element of being made by metallic conductor or semiconductor, is a kind of Sensitive Apparatus that strain variation on measured piece is converted into a kind of electric signal.It is one of chief component of pressure resistance type strain transducer.Sensor in resistance strain gage makes resistance change along with the pressure of outside produces deformation, is added in ohmically voltage and changes thereby make.Resistance strain gage is when pressurized, and its shape can change, and xsect and length all can change, and resistance also changes with shape.
Resistance strain gage comprise substrate, with substrate the match emulsion sheet, the lead-in wire that is clipped in the sensor between substrate and emulsion sheet and is connected with sensor of location.
Strain pressure transducer adopts the connected mode of full-bridge differential circuit, during work, four resistance strain gages is accessed adjacent two arms of electric bridges.The change in resistance that resistance strain gage produces when stressed is usually less, so resistance strain gage is formed strain bridge, not only can eliminate nonlinearity erron, but also has improved the output sensitivity of electric bridge, also has simultaneously the effect of temperature compensation.
Signal amplifier is three fortune amplifiers, and three fortune amplifiers are comprised of three integrated operational amplifiers, by three fortune amplifiers, signal is amplified, and has not only effectively amplified signal, also error has been dropped to minimum.
Single-chip microcomputer is the AT89C51 single-chip microcomputer.
The utility model compared with prior art has the following advantages and beneficial effect:
(1) the utility model has adopted strain pressure transducer, and the variation of the resistance that can produce because of compressive deformation according to sensor in resistance strain gage 2 changes into electric signal with pressure signal, thereby measures the pressure size.It is simple in structure, and volume is little, and is easy to use, stable and reliable for performance, highly sensitive, and dynamic response is fast.
(2) in the utility model, strain pressure transducer has adopted the differential connected mode of full-bridge, and is simple in structure, and eliminated nonlinearity erron, also improved output sensitivity, has the effect of temperature compensation.
(3) amplifier in the utility model has adopted three fortune amplifiers, and three fortune amplifiers are highly sensitive, easily drive, and are very little on the impact of signal, and the measuring accuracy of whole system is improved a lot.
Description of drawings
Fig. 1 is structured flowchart of the present utility model.
Fig. 2 is the structural representation of resistance strain gage.
1-substrate wherein, 2-sensor, 3-emulsion sheet, 4-lead-in wire.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail, but embodiment of the present utility model is not limited to this.
Embodiment:
Intelligent pressure detection system based on resistance strain gage, its structure as shown in Figure 1, comprise single-chip microcomputer, and be connected to keyboard, light-emitting diode display and A/D converter on single-chip microcomputer, also comprise the signal amplifier that is connected on A/D converter, and the strain pressure transducer that is connected with signal amplifier.Be provided with resistance strain gage in strain pressure transducer.The structure of resistance strain gage as shown in Figure 2, comprise substrate 1, with substrate 1 the match emulsion sheet 3, the lead-in wire 4 that is clipped in the sensor 2 between substrate 1 and emulsion sheet 3 and is connected with sensor 2 of location.Strain pressure transducer adopts the connected mode of full-bridge differential circuit.Signal amplifier is three fortune amplifiers.Single-chip microcomputer is the AT89C51 single-chip microcomputer.
The utility model according to full-bridge differential circuit connected mode, is bonded in the position of required measurement with strain pressure transducer by bonding agent when practicality.After switching on power, system initialization.In measuring process, sensor 2 compressive deformations in strain pressure transducer, its resistance value also changes thereupon, and the electric current by strain pressure transducer also changes thereupon, then pressure signal has been changed into electric signal, and 4 send out by going between.3 pairs of sensors of substrate 1 and emulsion sheet 2 and lead-in wire 4 have also played certain protective effect in this process.The pressure swing type pressure transducer adopts the differential connected mode of full-bridge to connect, and has not only eliminated the nonlinearity erron in the measuring process, has also improved the output sensitivity of electric bridge, has also played simultaneously the effect of temperature compensation.But because the distortion of sensor is small, be fainter so produce this electric signal.Therefore electric signal need to carry out the signal amplification through three fortune amplifiers, and three fortune amplifiers are comprised of three integrated operational amplifiers, have very high input impedance, and are minimum on the impact of signal, measuring error dropped to minimum.Electric signal is delivered to A/D converter after amplifying through three fortune amplifiers, and the digital signal that then becomes single-chip microcomputer to identify analog signal conversion after the single-chip microcomputer computing, converts signal to information that light-emitting diode display can be identified, shows at last output.The user can also think the computer system various data of input and order by keyboard, and Single Chip Microcomputer (SCM) system is arranged, and realizes man-machine interaction.
The above; it is only preferred embodiment of the present utility model; be not that the utility model is done any pro forma restriction, any simple modification, equivalent variations that every foundation technical spirit of the present utility model is done above embodiment are within all falling into protection domain of the present utility model.
Claims (6)
1. based on the intelligent pressure detection system of resistance strain gage, comprise single-chip microcomputer, and be connected to keyboard, light-emitting diode display and A/D converter on single-chip microcomputer, it is characterized in that: also comprise the signal amplifier that is connected on A/D converter, and the strain pressure transducer that is connected with signal amplifier.
2. the intelligent pressure detection system based on resistance strain gage according to claim 1, is characterized in that: be provided with resistance strain gage in described strain pressure transducer.
3. the intelligent pressure detection system based on resistance strain gage according to claim 1 and 2 is characterized in that: described resistance strain gage comprise substrate (1), with substrate (1) the match emulsion sheet (3) of location, the lead-in wire (4) that is clipped in the sensor (2) between substrate (1) and emulsion sheet (3) and is connected with sensor (2).
4. the intelligent pressure detection system based on resistance strain gage according to claim 3, is characterized in that: the connected mode of described strain pressure transducer employing full-bridge differential circuit.
5. the intelligent pressure detection system based on resistance strain gage according to claim 1 is characterized in that: described signal amplifier is three fortune amplifiers.
6. the intelligent pressure detection system based on resistance strain gage according to claim 1, work being characterised in that: described single-chip microcomputer is the AT89C51 single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220602330 CN203011606U (en) | 2012-11-15 | 2012-11-15 | Resistance strain gauge based intelligent pressure detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220602330 CN203011606U (en) | 2012-11-15 | 2012-11-15 | Resistance strain gauge based intelligent pressure detecting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203011606U true CN203011606U (en) | 2013-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220602330 Expired - Fee Related CN203011606U (en) | 2012-11-15 | 2012-11-15 | Resistance strain gauge based intelligent pressure detecting system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103643628A (en) * | 2013-11-16 | 2014-03-19 | 姬志刚 | Bridge support with pressure monitoring function |
| CN105005238A (en) * | 2015-07-01 | 2015-10-28 | 武汉理工大学 | Strain triggering high-altitude protection automatic control system |
| US10352801B2 (en) | 2016-05-10 | 2019-07-16 | Fike Corporation | Intelligent temperature and pressure gauge assembly |
-
2012
- 2012-11-15 CN CN 201220602330 patent/CN203011606U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103643628A (en) * | 2013-11-16 | 2014-03-19 | 姬志刚 | Bridge support with pressure monitoring function |
| CN105005238A (en) * | 2015-07-01 | 2015-10-28 | 武汉理工大学 | Strain triggering high-altitude protection automatic control system |
| US10352801B2 (en) | 2016-05-10 | 2019-07-16 | Fike Corporation | Intelligent temperature and pressure gauge assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130619 Termination date: 20131115 |