CN109358091A - A kind of α-Al2O3-SiO2 capacitance sensor dew point measurement device - Google Patents
A kind of α-Al2O3-SiO2 capacitance sensor dew point measurement device Download PDFInfo
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- CN109358091A CN109358091A CN201811114085.0A CN201811114085A CN109358091A CN 109358091 A CN109358091 A CN 109358091A CN 201811114085 A CN201811114085 A CN 201811114085A CN 109358091 A CN109358091 A CN 109358091A
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- chip
- pin
- dew point
- circuit
- xtr115ua
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- 229910052681 coesite Inorganic materials 0.000 title claims abstract description 15
- 229910052906 cristobalite Inorganic materials 0.000 title claims abstract description 15
- 239000000377 silicon dioxide Substances 0.000 title claims abstract description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 229910052682 stishovite Inorganic materials 0.000 title claims abstract description 15
- 229910052905 tridymite Inorganic materials 0.000 title claims abstract description 15
- 238000005259 measurement Methods 0.000 title claims abstract description 12
- 230000002093 peripheral effect Effects 0.000 claims abstract description 17
- 238000004891 communication Methods 0.000 claims abstract description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000003990 capacitor Substances 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/56—Investigating or analyzing materials by the use of thermal means by investigating moisture content
- G01N25/66—Investigating or analyzing materials by the use of thermal means by investigating moisture content by investigating dew-point
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Power Sources (AREA)
Abstract
The invention discloses a kind of α-Al2O3-SiO2 capacitance sensor dew point measurement devices, become module, dew point transducer, microprocessor, measuring circuit and power module including 4~20mA electric current loop, dew point transducer is connect with measuring circuit, 4~20mA electric current loop becomes module, measuring circuit, power module and connect with microprocessor, the microprocessor is also connected with communication module, and communication module includes RS485 circuit；The dew point transducer uses α-Al2O3-SiO2 capacitance sensor；The measuring circuit includes ICM7555CBA chip and peripheral circuit connected to it, and alumina sensor is connect with the pin 5 of ICM7555CBA chip；It includes XTR115UA chip and peripheral circuit connected to it that 4~20mA electric current loop, which becomes module, is used as power input after one diode of series connection of pin 7 of XTR115UA chip, the pin 4 of XTR115UA chip is used as output end.The present invention has the beneficial effects such as structure is simple, at low cost, low in energy consumption, measurement range is big.
Description
Technical field
The invention belongs to dew point transmitter fields, and in particular to a kind of α-Al2O3-SiO2 capacitance sensor dew point measurement dress
It sets.
Background technique
Dew point transmitter is the instrument for measuring dew point, mainly includes dew point transducer, measuring circuit and micro process
Device, dew point transducer are mostly capacitance sensor, carry out relationship by capacitance and dew point and are fitted to obtain dew point, by dew point signal with
Three lines or four-wire system 4~20mA analog signal output.The measuring circuit and line of the dew point transmitter of current this structure or four lines
The effect of making 4~20mA analog signal output is larger.
Summary of the invention
The purpose of the present invention is to provide α-Al2O3-SiO2 capacitance sensor dew that is a kind of low in energy consumption and can uploading in real time
Point measuring device.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of α-Al2O3-SiO2 capacitance sensor dew point measurement device, including 4~20mA electric current loop becomes module, dew point passes
Sensor, microprocessor, measuring circuit and power module, dew point transducer are connect with measuring circuit, and 4~20mA electric current loop becomes mould
Block, measuring circuit, power module are connect with microprocessor, it is characterised in that: and the microprocessor is also connected with communication module,
Communication module includes RS485 circuit；The dew point transducer uses α-Al2O3-SiO2 capacitance sensor；The measuring circuit packet
Include ICM7555CBA chip and peripheral circuit connected to it, the company of pin 5 of alumina sensor and ICM7555CBA chip
It connects；It includes XTR115UA chip and peripheral circuit connected to it that 4~20mA electric current loop, which becomes module, and described
The peripheral circuit of XTR115UA chip connection includes the triode being connected on the pin 5,6,7 of XTR115UA chip, triode
Collector be connected with the capacitor and zener diode of parallel relationship, capacitor and zener diode it is in parallel after with XTR115UA chip
Pin 4 connect, the pin 7 of XTR115UA chip connects and is used as power input after a diode, XTR115UA chip
Pin 4 is used as output end.
Further, the peripheral circuit connecting with the XTR115UA chip includes the pin for being connected to XTR115UA chip
5, the triode on 6,7, the collector of triode are connected with the capacitor and zener diode of parallel relationship, two pole of capacitor and pressure stabilizing
It is connect after pipe is in parallel with the pin 4 of XTR115UA chip.
Further, the microprocessor use MSP430F169 chip, the pin 5 of the MSP430F169 chip with
The pin 3 of ICM7555CBA chip connects.
Further, the power module includes voltage regulator circuit and power voltage step down circuit, and the voltage regulator circuit includes
ME6203A50M chip and peripheral circuit connected to it, the power voltage step down circuit include TLV70433DBVR chip and
Peripheral circuit connected to it, the pin 2 of the TLV70433DBVR are connect with the pin 2 of ME6203A50M chip.
The invention has the following advantages:
(1) chip of the ICM7555CBA as measuring circuit is used, the whole power consumption of device can be reduced；
(2) 485 chips of the MAX3471 as communicating circuit are used, being not only device has the function of real-time transmission data,
Also reduce power consumption；
(3) using α-Al2O3-SiO2 capacitance sensor as dew point transducer, increase the range for detecting dew point, response
Speed is fast；
(4) 4~20mA output end is changed to two-wire system, i.e. two output ends, power consumption can be reduced；
(5) structure is simple, at low cost, low in energy consumption, measurement range is big.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is microprocessor circuit schematic diagram of the present invention.
Fig. 3 is measuring circuit schematic diagram of the present invention.
Fig. 4 is that the present invention 4~20mA electric current loop becomes modular circuit schematic diagram.
Fig. 5 is communicating circuit structural schematic diagram of the present invention.
Fig. 6 is voltage regulator circuit figure of the present invention.
Fig. 7 is power voltage step down circuit diagram of the present invention.
Specific embodiment
As shown in Figure 1, α-Al2O3-SiO2 capacitance sensor dew point measurement device provided in this embodiment includes 4~20mA
Electric current loop becomes module, dew point transducer, microprocessor, measuring circuit and power module, and the microprocessor uses
MSP430F169 chip, circuit diagram is as shown in Fig. 2, the chip includes 64 pins, wherein the pin 8 and pin 9 are connected with
32.768K crystal oscillating circuit.The dew point transducer uses alumina sensor, described by the measure of the change dew point value of capacitor
Dew point transducer is connect with measuring circuit, and the measuring circuit includes ICM7555CBA chip, and circuit diagram is as shown in figure 3, described
ICM7555CBA chip pin 1 is grounded after being connected with resistance, and pin 3 is connect with the pin 5 of MSP430F169 chip, pin 5 with
Alumina sensor connection, pin 6, pin 7 and 8 parallel connection of pin connect to power supply, and measuring circuit is used for alumina sensor
The dew point value of acquisition is sent to microprocessor by measuring circuit, and the measuring circuit uses ICM7555CBA chip, low in energy consumption.
4~20mA electric current loop becomes module XTR115UA chip and peripheral circuit connected to it, physical circuit such as Fig. 4 institute
Show, pin 2 is connect with MSP430F169 chip, and pin 5,6,7 connects a triode, and the collector of triode is connected with parallel connection
It is connect after the capacitor and zener diode of relationship, capacitor and zener diode are in parallel with the pin 4 of XTR115UA chip, triode
Collector and the pin 4 of XTR115UA chip be used as output end, the pin 7 of XTR115UA chip, which is connected, to be made after a diode
Pin 4 for power input, XTR115UA chip is used as output end.Traditional four lines output is changed to the output of two lines, is compared
Lower power consumption.
The microprocessor is also connected with communication module, and communication module includes RS485 circuit；Physical circuit as shown in figure 5,
The RS485 circuit includes MAX3471 chip, and the pin 1,2,3 and 4 and MSP430F169 chip of the MAX3471 chip connect
It connects, the output end as data transmission of pin 6 and pin 7.
The power module includes voltage regulator circuit and power voltage step down circuit, and the voltage regulator circuit includes ME6203A50M chip
And peripheral circuit connected to it, as shown in fig. 6, the power voltage step down circuit include TLV70433DBVR chip and and its
The peripheral circuit of connection, the pin 2 of the TLV70433DBVR are connect with the pin 2 of ME6203A50M chip, as shown in Figure 7.
The above is only the preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto, any
The transformation and replacement carried out based on technical solution provided by the present invention and inventive concept should all be covered in protection model of the invention
In enclosing.
Claims (4)
1. a kind of α-Al2O3-SiO2 capacitance sensor dew point measurement device, including 4~20mA electric current loop become module, dew point sensor
Device, microprocessor, measuring circuit and power module, dew point transducer are connect with measuring circuit, 4~20mA electric current loop change module,
Measuring circuit, power module are connect with microprocessor, it is characterised in that: the microprocessor is also connected with communication module, leads to
Interrogating module includes RS485 circuit；The dew point transducer uses α-Al2O3-SiO2 capacitance sensor；The measuring circuit includes
ICM7555CBA chip and peripheral circuit connected to it, alumina sensor are connect with the pin 5 of ICM7555CBA chip；
It includes XTR115UA chip and peripheral circuit connected to it that 4~20mA electric current loop, which becomes module, with the XTR115UA
The peripheral circuit of chip connection includes the triode being connected on the pin 5,6,7 of XTR115UA chip, the collector of triode
Be connected with the capacitor and zener diode of parallel relationship, capacitor and zener diode it is in parallel after pin 4 with XTR115UA chip
It connects, is used as power input after one diode of series connection of pin 7 of XTR115UA chip, the pin 4 of XTR115UA chip is made
For output end.
2. α-Al2O3-SiO2 capacitance sensor dew point measurement device according to claim 1, it is characterised in that: described
RS485 circuit includes MAX3471 chip and peripheral circuit connected to it.
3. α-Al2O3-SiO2 capacitance sensor dew point measurement device according to claim 1, it is characterised in that: described micro-
Processor uses MSP430F169 chip, and the pin 5 of the MSP430F169 chip and the pin 3 of ICM7555CBA chip connect
It connects.
4. α-Al2O3-SiO2 capacitance sensor dew point measurement device according to claim 1, it is characterised in that: the electricity
Source module includes voltage regulator circuit and power voltage step down circuit, and the voltage regulator circuit includes ME6203A50M chip and connected to it
Peripheral circuit, the power voltage step down circuit include TLV70433DBVR chip and peripheral circuit connected to it, described
The pin 2 of TLV70433DBVR is connect with the pin 2 of ME6203A50M chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811114085.0A CN109358091A (en) | 2018-09-25 | 2018-09-25 | A kind of α-Al2O3-SiO2 capacitance sensor dew point measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811114085.0A CN109358091A (en) | 2018-09-25 | 2018-09-25 | A kind of α-Al2O3-SiO2 capacitance sensor dew point measurement device |
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| Publication Number | Publication Date |
|---|---|
| CN109358091A true CN109358091A (en) | 2019-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811114085.0A Pending CN109358091A (en) | 2018-09-25 | 2018-09-25 | A kind of α-Al2O3-SiO2 capacitance sensor dew point measurement device |
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| CN (1) | CN109358091A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2104006U (en) * | 1991-06-17 | 1992-05-13 | 王晓林 | Humidometer |
| WO1996005506A1 (en) * | 1994-08-16 | 1996-02-22 | Industrial Research Limited | A dew point sensor |
| CN2237238Y (en) * | 1995-04-08 | 1996-10-09 | 南征 | Intelligent SF6 gas density monitor |
| CN2711715Y (en) * | 2004-07-07 | 2005-07-20 | 李冠文 | Pressure temperature voltage sensing transmitter for tyre tester |
| CN101162162A (en) * | 2007-11-14 | 2008-04-16 | 合肥工业大学 | Low-power consumption two-wire system vortex flowmeter |
| CN201837606U (en) * | 2010-11-03 | 2011-05-18 | 苏赋文 | Online monitor for dew point and density of sulfur hexafluoride |
| CN102103099A (en) * | 2009-12-21 | 2011-06-22 | 上海莫克电子技术有限公司 | Natural gas dew point instrument |
| CN102103110A (en) * | 2009-12-21 | 2011-06-22 | 上海莫克电子技术有限公司 | High-temperature dew point meter with longer service life |
| CN102520015A (en) * | 2011-12-12 | 2012-06-27 | 北京航空航天大学 | Sensitive circuit type dew point measuring method |
| CN204832086U (en) * | 2015-08-05 | 2015-12-02 | 无锡市计量检定测试中心 | Automatic calbiration system of dew -point hygrometer |
| CN205748769U (en) * | 2016-06-15 | 2016-11-30 | 西安中星测控有限公司 | Pressure transducer |
-
2018
- 2018-09-25 CN CN201811114085.0A patent/CN109358091A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2104006U (en) * | 1991-06-17 | 1992-05-13 | 王晓林 | Humidometer |
| WO1996005506A1 (en) * | 1994-08-16 | 1996-02-22 | Industrial Research Limited | A dew point sensor |
| CN2237238Y (en) * | 1995-04-08 | 1996-10-09 | 南征 | Intelligent SF6 gas density monitor |
| CN2711715Y (en) * | 2004-07-07 | 2005-07-20 | 李冠文 | Pressure temperature voltage sensing transmitter for tyre tester |
| CN101162162A (en) * | 2007-11-14 | 2008-04-16 | 合肥工业大学 | Low-power consumption two-wire system vortex flowmeter |
| CN102103099A (en) * | 2009-12-21 | 2011-06-22 | 上海莫克电子技术有限公司 | Natural gas dew point instrument |
| CN102103110A (en) * | 2009-12-21 | 2011-06-22 | 上海莫克电子技术有限公司 | High-temperature dew point meter with longer service life |
| CN201837606U (en) * | 2010-11-03 | 2011-05-18 | 苏赋文 | Online monitor for dew point and density of sulfur hexafluoride |
| CN102520015A (en) * | 2011-12-12 | 2012-06-27 | 北京航空航天大学 | Sensitive circuit type dew point measuring method |
| CN204832086U (en) * | 2015-08-05 | 2015-12-02 | 无锡市计量检定测试中心 | Automatic calbiration system of dew -point hygrometer |
| CN205748769U (en) * | 2016-06-15 | 2016-11-30 | 西安中星测控有限公司 | Pressure transducer |
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|---|
| 孙丽梅 等: "基于MSP430FR6972的四声道超声波智能水表的电路设计", 《仪器仪表用户》 * |
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| 王雪文 等: "《传感器原理及应用》", 31 March 2004 * |
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Application publication date: 20190219 |
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| RJ01 | Rejection of invention patent application after publication |